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Yan H, Liu Y, Zhang H, Jin S, Han Z, Woo J, Tucker ME, Meng L, Chi X, Han C, Zhao Y, Zhao Y, Zhao H. Interaction of Ca 2+ and Fe 3+ in co-precipitation process induced by Virgibacillus dokdonensis and its application. J Environ Sci (China) 2025; 147:131-152. [PMID: 39003035 DOI: 10.1016/j.jes.2023.10.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/18/2023] [Accepted: 10/18/2023] [Indexed: 07/15/2024]
Abstract
Biomineralization has garnered significant attention in the field of wastewater treatment due to its notable cost reduction compared to conventional methods. The reinjection water from oilfields containing an exceedingly high concentration of calcium and ferric ions will pose a major hazard in production. However, the utilization of biomineralization for precipitating these ions has been scarcely investigated due to limited tolerance among halophiles towards such extreme conditions. In this study, free and immobilized halophiles Virgibacillus dokdonensis were used to precipitate these ions and the effects were compared, at the same time, biomineralization mechanisms and mineral characteristics were further explored. The results show that bacterial concentration and carbonic anhydrase activity were higher when additionally adding ferric ion based on calcium ion; the content of protein, polysaccharides, deoxyribonucleic acid and humic substances in the extracellular polymers also increased compared to control. Calcium ions were biomineralized into calcite and vaterite with multiple morphology. Due to iron doping, the crystallinity and thermal stability of calcium carbonate decreased, the content of OC = O, NC = O and CO-PO3 increased, the stable carbon isotope values became much more negative, and β-sheet in minerals disappeared. Higher calcium concentrations facilitated ferric ion precipitation, while ferric ions hindered calcium precipitation. The immobilized bacteria performed better in ferric ion removal, with a precipitation ratio exceeding 90%. Free bacteria performed better in calcium removal, and the precipitation ratio reached a maximum of 56%. This research maybe provides some reference for the co-removal of calcium and ferric ions from the oilfield wastewater.
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Affiliation(s)
- Huaxiao Yan
- College of Chemical and Biological Engineering, College of Earth Science and Engineering, Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao 266590, China
| | - Yuping Liu
- College of Chemical and Biological Engineering, College of Earth Science and Engineering, Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao 266590, China
| | - Haojuan Zhang
- College of Chemical and Biological Engineering, College of Earth Science and Engineering, Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao 266590, China
| | - Shengping Jin
- College of Chemical and Biological Engineering, College of Earth Science and Engineering, Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao 266590, China
| | - Zuozhen Han
- College of Chemical and Biological Engineering, College of Earth Science and Engineering, Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao 266590, China; Laboratory for Marine Mineral Resources, Center for Isotope Geochemistry and Geochronology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
| | - Jusun Woo
- School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea
| | - Maurice E Tucker
- School of Earth Sciences, University of Bristol, Bristol BS8 1RJ, UK; Cabot Institute, University of Bristol, Cantock's Close, Bristol BS8 1UJ, UK
| | - Long Meng
- College of Chemical and Biological Engineering, College of Earth Science and Engineering, Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao 266590, China
| | - Xiangqun Chi
- College of Chemical and Biological Engineering, College of Earth Science and Engineering, Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao 266590, China
| | - Chao Han
- College of Chemical and Biological Engineering, College of Earth Science and Engineering, Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao 266590, China
| | - Yanyang Zhao
- College of Chemical and Biological Engineering, College of Earth Science and Engineering, Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao 266590, China
| | - Yueming Zhao
- Qingdao West Coast New District First High School, Qingdao 266555, China
| | - Hui Zhao
- College of Chemical and Biological Engineering, College of Earth Science and Engineering, Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao 266590, China.
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Akbaba Y, Kacı FN, Arslan ME, Göksü S, Mardinoğlu A, Türkez H. Novel tetrahydronaphthalen-1-yl-phenethyl ureas: synthesis and dual antibacterial-anticancer activities. J Enzyme Inhib Med Chem 2024; 39:2286925. [PMID: 38062550 DOI: 10.1080/14756366.2023.2286925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 11/19/2023] [Indexed: 12/18/2023] Open
Abstract
Cancer and antibiotic-resistant bacterial infections are significant global health challenges. The resistance developed in cancer treatments intensifies therapeutic difficulties. In addressing these challenges, this study synthesised a series of N,N'-dialkyl urea derivatives containing methoxy substituents on phenethylamines. Using isocyanate for the efficient synthesis yielded target products 14-18 in 73-76% returns. Subsequently, their antibacterial and anticancer potentials were assessed. Cytotoxicity tests on cancer cell lines, bacterial strains, and a healthy fibroblast line revealed promising outcomes. All derivatives demonstrated robust antibacterial activity, with MIC values ranging from 0.97 to 15.82 µM. Notably, compounds 14 and 16 were particularly effective against the HeLa cell line, while compounds 14, 15, and 17 showed significant activity against the SH-SY5Y cell line. Importantly, these compounds had reduced toxicity to healthy fibroblast cells than to cancer cells, suggesting their potential as dual-functioning agents targeting both cancer and bacterial infections.
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Affiliation(s)
- Yusuf Akbaba
- Department of Basic Sciences, Faculty of Science, Erzurum Technical University, Erzurum, Turkey
| | - Fatma Necmiye Kacı
- Department of Molecular Biology & Genetics, Faculty of Science, Erzurum Technical University, Erzurum, Turkey
- Faculty of Medicine and Health, St. James' University Hospital, University of Leeds, Leeds, UK
| | - Mehmet Enes Arslan
- Department of Molecular Biology and Genetics, Faculty of Science, Erzurum Technical University, Erzurum, Turkey
| | - Süleyman Göksü
- Department of Chemistry, Faculty of Science, Atatürk University, Erzurum, Turkey
| | - Adil Mardinoğlu
- Science for Life Laboratory, KTH-Royal Institute of Technology, Stockholm, Sweden
- Centre for Host-Microbiome Interactions, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, London, UK
| | - Hasan Türkez
- Department of Medical Biology, Faculty of Medicine, Atatürk University, Erzurum, Turkey
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Zhang K, Yang N, Teng D, Mao R, Hao Y, Wang J. Expression and characterization of the new antimicrobial peptide AP138L-arg26 anti Staphylococcus aureus. Appl Microbiol Biotechnol 2024; 108:111. [PMID: 38229298 DOI: 10.1007/s00253-023-12947-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 10/18/2023] [Accepted: 10/25/2023] [Indexed: 01/18/2024]
Abstract
The low activity and yield of antimicrobial peptides (AMPs) are pressing problems. The improvement of activity and yield through modification and heterologous expression, a potential way to solve the problem, is a research hot-pot. In this work, a new plectasin-derived variant L-type AP138 (AP138L-arg26) was constructed for the study of recombination expression and druggablity. As a result, the total protein concentration of AP138L-arg26 was 3.1 mg/mL in Pichia pastoris X-33 supernatant after 5 days of induction expression in a 5-L fermenter. The recombinant peptide AP138L-arg26 has potential antibacterial activity against selected standard and clinical Gram-positive bacteria (G+, minimum inhibitory concentration (MIC) 2-16 µg/mL) and high stability under different conditions (temperature, pH, ion concentration) and 2 × MIC of AP138L-arg26 could rapidly kill Staphylococcus aureus (S. aureus) (> 99.99%) within 1.5 h. It showed a high safety in vivo and in vivo and a long post-antibiotic effect (PAE, 1.91 h) compared with vancomycin (1.2 h). Furthermore, the bactericidal mechanism was revealed from two dimensions related to its disruption of the cell membrane resulting in intracellular potassium leakage (2.5-fold higher than control), and an increase in intracellular adenosine triphosphate (ATP), and reactive oxygen species (ROS), the decrease of lactate dehydrogenase (LDH) and further intervening metabolism in S. aureus. These results indicate that AP138L-arg26 as a new peptide candidate could be used for more in-depth development in the future. KEY POINTS: • The AP138L-arg26 was expressed in the P. pastoris expression system with high yield • The AP138 L-arg26 showed high stability and safety in vitro and in vivo • The AP138L-arg26 killed S. aureus by affecting cell membranes and metabolism.
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Affiliation(s)
- Kun Zhang
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, People's Republic of China
- Innovative Team of Antimicrobial Peptides and Alternatives to Antibiotics, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, 100081, People's Republic of China
| | - Na Yang
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, People's Republic of China.
- Innovative Team of Antimicrobial Peptides and Alternatives to Antibiotics, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China.
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, 100081, People's Republic of China.
| | - Da Teng
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, People's Republic of China
- Innovative Team of Antimicrobial Peptides and Alternatives to Antibiotics, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, 100081, People's Republic of China
| | - Ruoyu Mao
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, People's Republic of China
- Innovative Team of Antimicrobial Peptides and Alternatives to Antibiotics, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, 100081, People's Republic of China
| | - Ya Hao
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, People's Republic of China
- Innovative Team of Antimicrobial Peptides and Alternatives to Antibiotics, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, 100081, People's Republic of China
| | - Jianhua Wang
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun Nandajie St., Haidian District, Beijing, 100081, People's Republic of China.
- Innovative Team of Antimicrobial Peptides and Alternatives to Antibiotics, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, People's Republic of China.
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, 100081, People's Republic of China.
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Yang Y, Jia Y, Zhang M, Luo Y, Zhang Z, Wu W, Yuan L. Synthesis, characterization, antioxidant and bacteriostasis in preservation of isoorientin loaded Zein/GA nanoparticles. Food Chem X 2024; 23:101604. [PMID: 39050676 PMCID: PMC11268198 DOI: 10.1016/j.fochx.2024.101604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 06/23/2024] [Accepted: 06/28/2024] [Indexed: 07/27/2024] Open
Abstract
Isoorientin (Iso) is a natural flavone with multiple activities. In the present study, the partial chemical properties and activities of Iso were improved by the nanoparticle loading technique. Zein/GA nanoparticles were successfully synthesized with the antisolvent precipitation method, and the structure and stability of the Zein/GA nanoparticles loaded with Iso (Zein/GA-Iso nanoparticles) were characterized by FTIR, UV-vis spectroscopy and zeta-sizer analysis. Results showed that Zein/GA-Iso nanoparticles possessed greater stability, light stability, hydrophilicity and antioxidant activity. Furthermore, Zein/GA-Iso nanoparticles exerted notable antibacterial activity against E. coli, S. aureus, and P. aeruginosa by destroying the permeability and integrity of cell membrane. On this basis, Zein/GA-Iso nanoparticles do have a bacteriostatic effect on pork. In conclusion, Zein/GA-Iso nanoparticles had better stability and pork preservation for applications in the food processing field as a new type of antiseptic and freshening agent.
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Affiliation(s)
| | | | | | - Ying Luo
- Engineering Research Center of High Value Utilization of Western China Fruit Resources, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, People's Republic of China
| | - Zhong Zhang
- Engineering Research Center of High Value Utilization of Western China Fruit Resources, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, People's Republic of China
| | - Wanqiang Wu
- Engineering Research Center of High Value Utilization of Western China Fruit Resources, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, People's Republic of China
| | - Li Yuan
- Engineering Research Center of High Value Utilization of Western China Fruit Resources, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, People's Republic of China
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5
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Yang L, Wu X, Wu G, Wu Y, Li H, Shao B. Association analysis of antibiotic and disinfectant resistome in human and foodborne E. coli in Beijing, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 944:173888. [PMID: 38866143 DOI: 10.1016/j.scitotenv.2024.173888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 05/21/2024] [Accepted: 06/08/2024] [Indexed: 06/14/2024]
Abstract
The widespread use of chemical disinfectants and antibiotics poses a major threat to food safety and human health. However, the mechanisms of co-transmission of antimicrobial resistance genes (ARGs) and biocides and metal resistance genes (BMRGs) of foodborne pathogens in the food chain is still unclear. This study isolated 343 E. coli strains from animal-derived foods in Beijing and incorporated online data of human-derived E. coli strains from NCBI. Our results demonstrated a relatively uniform distribution of strains from various regions in Beijing, indicating a lack of region-specific clustering. Additionally, predominant sequence types varied between food- and human-derived strains, suggesting a preference for different hosts and environments. Phenotypic association analysis showed that the chlorine disinfectants peroxides had a significant positive correlation with tetracyclines. Many more ARGs and BMRGs were enriched in human-associated E. coli compared with those in chicken- and pork-origin. The quaternary ammonium compounds (QACs) resistance gene qacEΔ1 had a strong correlation with aminoglycoside resistance gene aadA5, folate pathway antagonist resistance gene dfrA17, sul1 and macrolide resistance gene mph(A). The correlation results indicated a significant association between the copper resistance gene cluster pco and the silver resistance gene cluster sil. Coexistence of many resistance genes was observed within the qacEΔ1 gene structure, with qacEΔ1-sul1 being the most common combination. Our findings demonstrated that the epidemiological spread of resistance is affected by a combination of heavy metals, disinfectants and antibiotic use, suggesting that the prevention and control strategies of antimicrobial resistance need to be multifaceted and comprehensive.
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Affiliation(s)
- Lu Yang
- Shanghai Anti-doping Laboratory, Shanghai University of Sport, Shanghai 200438, China; Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Prevention and Control, Beijing 100013, China
| | - Xuan Wu
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Prevention and Control, Beijing 100013, China; School of Public Health, Capital Medical University, Beijing 100069, China
| | - Guoquan Wu
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Prevention and Control, Beijing 100013, China; National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Yige Wu
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Prevention and Control, Beijing 100013, China; National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Hui Li
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Prevention and Control, Beijing 100013, China; School of Public Health, Capital Medical University, Beijing 100069, China.
| | - Bing Shao
- Shanghai Anti-doping Laboratory, Shanghai University of Sport, Shanghai 200438, China; Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Prevention and Control, Beijing 100013, China; National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.
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6
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Huang W, Chen H, Jia M, Li Q, Chen M, Guo X. Genomic and proteomic analyses reveal the reduction mechanism of hexavalent chromium by the culturing supernatant of strain Pediococcus acidilactici 13-7. JOURNAL OF HAZARDOUS MATERIALS 2024; 477:135161. [PMID: 39038378 DOI: 10.1016/j.jhazmat.2024.135161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 05/30/2024] [Accepted: 07/08/2024] [Indexed: 07/24/2024]
Abstract
This study used lactic acid bacteria with high antioxidative properties to screen for strains capable of reducing hexavalent chromium [Cr (VI)] in their culturing supernatants. The strain Pediococcus acidilactici 13-7 exhibited potent Cr (VI)-reducing capability and remarkable resistance to Cr (VI) even at concentration as high as 24 mM. Comparative genomics analysis revealed a unique gene, ChrR, associated with Cr (VI) reduction in this strain, distinguishing it from four reference strains of P. acidilactici. The proteomic investigation identified proteins linked to the ChrR gene, such as nqo1, frdA, and gshR, indicating significant enrichment in redox-related functions and oxidative phosphorylation pathways. These findings suggest that P. acidilactici 13-7 possesses superior electron transfer capacity compared to other strains, making it more adaptable under highly oxidative conditions by modulating the external environment to mitigate oxidative stress. Collectively, the results demonstrated the potential application of this lactic acid bacterial strain for bioremediation of heavy metals by its ability to reduce Cr (VI), and shed light on the molecular mechanisms underlying Cr (VI) reduction of the strain P. acidilactici 13-7.
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Affiliation(s)
- Wenkang Huang
- School of Life Sciences, Lanzhou University, Lanzhou, Gansu Province 730000, China; Probiotics and Life Health Institute, Lanzhou University, Lanzhou 730000, China
| | - Hu Chen
- School of Life Sciences, Lanzhou University, Lanzhou, Gansu Province 730000, China
| | - Mengya Jia
- School of Life Sciences, Lanzhou University, Lanzhou, Gansu Province 730000, China; Probiotics and Life Health Institute, Lanzhou University, Lanzhou 730000, China
| | - Qiang Li
- School of Life Sciences, Lanzhou University, Lanzhou, Gansu Province 730000, China; Probiotics and Life Health Institute, Lanzhou University, Lanzhou 730000, China
| | - Mengyan Chen
- School of Life Sciences, Lanzhou University, Lanzhou, Gansu Province 730000, China; Probiotics and Life Health Institute, Lanzhou University, Lanzhou 730000, China
| | - Xusheng Guo
- School of Life Sciences, Lanzhou University, Lanzhou, Gansu Province 730000, China; Probiotics and Life Health Institute, Lanzhou University, Lanzhou 730000, China.
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Paudel R, Shrestha E, Chapagain B, Tiwari BR. Carbapenemase producing Gram negative bacteria: Review of resistance and detection methods. Diagn Microbiol Infect Dis 2024; 110:116370. [PMID: 38924837 DOI: 10.1016/j.diagmicrobio.2024.116370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 05/18/2024] [Accepted: 05/20/2024] [Indexed: 06/28/2024]
Abstract
Gram negative bacilli that are carbapenem resistant have emerged and are spreading worldwide. Infections caused by carbapenem resistant isolates posses a significant threat due to their high morbidity and mortality rates. Carbapenemases production by multi-drug resistant pathogens severely restricts treatment choices for illnesses caused by bacteria that are resistant to both carbapenems and majority of β-lactam antibiotics. Various phenotypic and genotypic methods for identification can distinguish between different classes of carbapenemase and identify pathogens that are resistant to carbapenems. The establishment of a quick, accurate and reliable test for identifying the clinical strains that produce the carbapenemase enzyme is essential for optimum diagnosis of microbial pathogens and management of the global rise in the prevalence of carbapenemase producing bacterial strains. The aim of this review was to summarize the mechanisms of carbapenem resistance and to provide an overview of different carbapenemase detection methods for carbapenem resistant Gram negative bacilli.
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Affiliation(s)
- Rajan Paudel
- School of Health and Allied Sciences, Pokhara University, Pokhara, Nepal.
| | - Elina Shrestha
- School of Health and Allied Sciences, Pokhara University, Pokhara, Nepal
| | - Bipin Chapagain
- School of Health and Allied Sciences, Pokhara University, Pokhara, Nepal
| | - Bishnu Raj Tiwari
- School of Health and Allied Sciences, Pokhara University, Pokhara, Nepal
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Lamba S, Heruka De Zoysa G, Wang K, Lu J, Swift S, Sarojni V. Homo and Hetero-Branched Lipopeptide Dendrimers: Synthesis and Antimicrobial Activity. Bioorg Chem 2024; 150:107567. [PMID: 38936047 DOI: 10.1016/j.bioorg.2024.107567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 05/30/2024] [Accepted: 06/14/2024] [Indexed: 06/29/2024]
Abstract
Di-branched and tetra-branched versions of a previously reported analogue of the lipopeptide battacin were successfully synthesised using thiol-maleimide click and 1, 2, 3-triazole click chemistry. Antimicrobial studies against drug resistant clinical isolates of Escherichia coli (ESBL E. coli Ctx-M14), Pseudomonas aeruginosa (P. aeruginosa Q502), and Methicillin resistant Staphylococcus aureus (MRSA ATCC 33593), as well as clinically isolated Acinetobacter baumannii (A. baumannii ATCC 19606), and P. aeruginosa (ATCC 27853), revealed that the dendrimeric peptides have antimicrobial activity in the low micromolar range (0.5 -- 4 μM) which was 10 times more potent than the monomer peptides. Under high salt concentrations (150 mM NaCl, 2 mM MgCl2, and 2.5 mM CaCl2) the di-branched lipopeptides retained their antimicrobial activity while the monomer peptides were not active (>100 μM). The di-branched triazole click lipopeptide, Peptide 12, was membrane lytic, showed faster killing kinetics, and exhibited antibiofilm activity against A. baumannii and MRSA and eradicated > 85 % preformed biofilms at low micromolar concentrations. The di-branched analogues were > 30-fold potent than the monomers against Candida albicans. Peptide 12 was not haemolytic (HC10 = 932.12 μM) and showed up to 40-fold higher selectivity against bacteria and fungi than the monomer peptide. Peptide 12 exhibited strong proteolytic stability (>80 % not degraded) in rat serum over 24 h whereas > 95 % of the thiol-maleimide analogue (Peptide 10) was degraded. The tetra-branched peptides showed comparable antibacterial potency to the di-branched analogues. These findings indicate that dual branching using triazole click chemistry is a promising strategy to improve the antimicrobial activity and proteolytic stability of battacin based lipopeptides. The information gathered can be used to build effective antimicrobial dendrimeric peptides as new peptide antibiotics.
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Affiliation(s)
- Saurabh Lamba
- School of Chemical Sciences and The Centre for Green Chemical Science, University of Auckland, Auckland 1142, New Zealand; The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6012, New Zealand
| | - Gayan Heruka De Zoysa
- School of Chemical Sciences and The Centre for Green Chemical Science, University of Auckland, Auckland 1142, New Zealand
| | - Kelvin Wang
- Auckland Bioengineering Institute, University of Auckland, Auckland 1142, New Zealand
| | - Jun Lu
- Auckland Bioengineering Institute, University of Auckland, Auckland 1142, New Zealand
| | - Simon Swift
- Department of Molecular Medicine and Pathology, School of Medical Sciences, University of Auckland, Auckland 1142, New Zealand
| | - Vijayalekshmi Sarojni
- School of Chemical Sciences and The Centre for Green Chemical Science, University of Auckland, Auckland 1142, New Zealand; The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6012, New Zealand.
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9
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Sánchez-Bodón J, Moreno-Benitez I, Laza JM, Larrea-Sebal A, Martin C, Irastorza I, Silvan U, Vilas-Vilela JL. Multifunctional curcumin-based polymer coating: A promising platform against bacteria, inflammation and coagulation. Colloids Surf B Biointerfaces 2024; 241:114048. [PMID: 38954936 DOI: 10.1016/j.colsurfb.2024.114048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 05/30/2024] [Accepted: 06/17/2024] [Indexed: 07/04/2024]
Abstract
The extensive use of polymers in the medical field has facilitated the development of various devices and implants, contributing to the restoration of organ function. However, despite their advantages such as biocompatibility and robustness, these materials often face challenges like bacterial contamination and subsequent inflammation, leading to implant-associated infections (IAI). Integrating implants effectively is crucial to prevent bacterial colonization and reduce inflammatory responses. To overcome these major issues, surface chemical modifications have been extensively explored. Indeed, click chemistry, and particularly, copper (I)-catalyzed azide-alkyne cycloaddition (CuAAC) reaction has emerged as a promising approach for surface functionalization without affecting material bulk properties. Curcumin, known for its diverse biological activities, suffers from low solubility and stability. To enhance its bioavailability, bioconjugation strategy has garnered attention in recent years. This study represents pioneering work in immobilizing curcumin derivative onto polyethylene terephthalate (PET) surfaces, aiming to combat bacterial adhesion, inflammation and coagulation. Before curcumin derivative bioconjugation, a fluorophore, dansyl derivative, was employed in order to monitor and determine the efficiency of the proposed methodology. Previous surface chemical modifications were required for the immobilization of both dansyl and curcumin derivatives. Ultraviolet-Visible (UV-Vis) demonstrated the amidation functionalization of PET surface. Other surface characterization techniques including X-ray Photoelectron Spectroscopy (XPS), Attenuated Total Reflectance Fourier Transformed Infrared (ATR-FTIR), Scanning Electron Microscopy (SEM) and contact angle, among others, confirmed also the conjugation of both dansyl and curcumin derivatives. On the other hand, different biological assays corroborated that curcumin derivative immobilized PET surfaces do not exhibit cytotoxicity effect. Additionally, corresponding inflammation test were performed, indicating that these polymeric surfaces do not produce inflammation and, when curcumin derivative is immobilized, they decrease the inflammation marker level (IL-6). Moreover, the bacterial growth of both Gram positive and Gram negative bacteria were measured, demonstrating that the immobilization of curcumin derivative on PET provided antibacterial properties to the material. Finally, hemolysis rate analysis and whole blood clotting assay demonstrated the antithrombogenic effect of PET-Cur surfaces as well as no hemolysis concern in the fabricated functional surfaces.
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Affiliation(s)
- Julia Sánchez-Bodón
- Macromolecular Chemistry Group (LABQUIMAC), Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country, UPV/EHU, B/Sarriena s/n, Leioa, 48940, Spain
| | - Isabel Moreno-Benitez
- Macromolecular Chemistry Group (LABQUIMAC), Department of Organic and Inorganic Chemistry, Faculty of Science and Technology, University of the Basque Country, UPV/EHU, B/Sarriena s/n, Leioa, 48940, Spain.
| | - José Manuel Laza
- Macromolecular Chemistry Group (LABQUIMAC), Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country, UPV/EHU, B/Sarriena s/n, Leioa, 48940, Spain
| | - Asier Larrea-Sebal
- University of the Basque Country (UPV/EHU), Department of Biochemistry and Molecular Biology, Leioa 48940, Spain; Biofisika Institute (UPV/EHU, CSIC), Barrio Sarriena s/n, Leioa 48940, Spain; Fundación Biofisika Bizkaia, Barrio Sarriena s/n., 48940 Leioa, Bizkaia, Spain
| | - Cesar Martin
- University of the Basque Country (UPV/EHU), Department of Biochemistry and Molecular Biology, Leioa 48940, Spain; Biofisika Institute (UPV/EHU, CSIC), Barrio Sarriena s/n, Leioa 48940, Spain; Fundación Biofisika Bizkaia, Barrio Sarriena s/n., 48940 Leioa, Bizkaia, Spain
| | - Igor Irastorza
- University of the Basque Country, (UPV/EHU), Department of Cell Biology and Histology, Faculty of Medicine, Leioa 48940, Spain; BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
| | - Unai Silvan
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
| | - José Luis Vilas-Vilela
- Macromolecular Chemistry Group (LABQUIMAC), Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country, UPV/EHU, B/Sarriena s/n, Leioa, 48940, Spain; BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain.
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10
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Paankhao N, Sangsawang A, Kantha P, Paankhao S, Promsee K, Soontara C, Kongsriprapan S, Srisapoome P, Kumwan B, Meachasompop P, Phrompanya P, Buncharoen W, Uchuwittayakul A. Antioxidant and antibacterial efficiency of the ethanolic leaf extract of Kratom (Mitragyna speciosa (Korth.) Havil) and its effects on growth, health, and disease resistance against Edwardsiella tarda infection in Nile tilapia (Oreochromis niloticus). FISH & SHELLFISH IMMUNOLOGY 2024; 152:109771. [PMID: 39025168 DOI: 10.1016/j.fsi.2024.109771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 07/12/2024] [Accepted: 07/14/2024] [Indexed: 07/20/2024]
Abstract
The research examined the impact of an ethanolic extract from the leaves of Kratom (Mitragyna speciosa (Korth.) Havil.) on the growth, antioxidant capacity, immune-related gene expression, and resistance to disease caused by Edwardsiella tarda in Nile tilapia (Oreochromis niloticus). The findings revealed that the extract had the important phytochemical content in the extract included total phenolics content, total flavonoids content, vitamin C, and total antioxidant capacity and 5.42 % of the crude extract was mitragynine. The extract demonstrated antioxidant activity, as evidenced by its IC50 values against ABTS and DPPH radicals and its ferric reducing power in vitro. Moreover, the MIC-IC50 value of 0.625 mg/mL indicated that the growth of the bacteria was reduced by approximately 50 %, and the MBC was 2.50 mg/mL against E. tarda. Furthermore, the orally administered Kratom leaf extract to fingerling tilapia for 8 weeks exhibited a noticeable increase in oxidative stress, as demonstrated by the increase in MDA production in the 10 and 25 g/kg groups. It also exhibited an increase in acetylcholinesterase (AChE) activity in muscle tissue at the 50 g/kg group. However, when administered at a feeding rate of 5-10 g/kg feed, the extract showed an increase in the expression of immune-related genes (IL1, IL6, IL8, NF-kB, IFNγ, TNFα, Mx, CC-chemokine, CD4, TCRβ, MHC-IIβ, IgM, IgT, IgD) and enhanced resistance to E. tarda infection in fish. Conversely, administering the extract at 25-50 g/kg feed resulted in contrasting effects, suppressing and reducing the observed parameters. Nevertheless, feeding the extract at all concentrations for 8 weeks did not produce any changes in the histology or systemic functioning of the liver and intestines, as indicated by blood biochemistry. These findings suggest that the ethanolic leaf extract from Kratom has the potential to be used as a substitute for antibiotics in the management of bacterial infections in Nile tilapia culture, with a recommended dosage of 5-10 g/kg feed/day for a maximum of 8 weeks.
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Affiliation(s)
- Natthapong Paankhao
- Kamphaeng Saen Fisheries Research Station, Faculty of Fisheries, Kasetsart University, Kamphaeng Saen Campus, Kamphaeng Saen, Nakhon Pathom, 73140, Thailand.
| | - Akkarasiri Sangsawang
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand.
| | - Phunsin Kantha
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand.
| | - Suwinai Paankhao
- Kamphaeng Saen Fisheries Research Station, Faculty of Fisheries, Kasetsart University, Kamphaeng Saen Campus, Kamphaeng Saen, Nakhon Pathom, 73140, Thailand.
| | - Kittipong Promsee
- Kamphaeng Saen Fisheries Research Station, Faculty of Fisheries, Kasetsart University, Kamphaeng Saen Campus, Kamphaeng Saen, Nakhon Pathom, 73140, Thailand.
| | - Chayanit Soontara
- Kamphaeng Saen Fisheries Research Station, Faculty of Fisheries, Kasetsart University, Kamphaeng Saen Campus, Kamphaeng Saen, Nakhon Pathom, 73140, Thailand.
| | - Sopanat Kongsriprapan
- Faculty of Science at Sriracha, Kasetsart University, Si Racha Campus, Si Racha, Chonburi, 20230, Thailand.
| | - Prapansak Srisapoome
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand; Laboratory of Aquatic Animal Health Management, Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand; Center of Excellence in Aquatic Animal Health Management, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand.
| | - Benchawan Kumwan
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand; Laboratory of Aquatic Animal Health Management, Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand; Center of Excellence in Aquatic Animal Health Management, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand.
| | - Pakapon Meachasompop
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand; Laboratory of Aquatic Animal Health Management, Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand; Center of Excellence in Aquatic Animal Health Management, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand.
| | - Phornphan Phrompanya
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand.
| | - Wararut Buncharoen
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand.
| | - Anurak Uchuwittayakul
- Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand; Laboratory of Aquatic Animal Health Management, Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand; Center of Excellence in Aquatic Animal Health Management, Faculty of Fisheries, Kasetsart University, Bangkok, 10900, Thailand.
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11
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Ribeiro ARM, Teixeira MO, Ribeiro L, Tavares TD, Miranda CS, Costa AF, Ribeiro A, Silva MM, Silva C, Felgueiras HP. Sodium alginate-based multifunctional sandwich-like system for treating wound infections. BIOMATERIALS ADVANCES 2024; 162:213931. [PMID: 38924805 DOI: 10.1016/j.bioadv.2024.213931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 05/29/2024] [Accepted: 06/18/2024] [Indexed: 06/28/2024]
Abstract
Microbial colonization and development of infections in wounds is a sign of chronicity. The prevailing approach to manage and treat these wounds involves dressings. However, these often fail in effectively addressing infections, as they struggle to both absorb exudates and maintain optimal local moisture. The system here presented was conceptualized with a three-layer design: the outer layer made of a fibrous polycaprolactone (PCL) film, to act as a barrier for preventing microorganisms and impurities from reaching the wound; the intermediate layer formed of a sodium alginate (SA) hydrogel loaded with ampicillin (Amp) for fighting infections; and the inner layer comprised of a fibrous film of PCL and polyethylene glycol (PEG) for facilitating cell recognition and preventing wound adhesion. Thermal evaluations, degradation, wettability and release behavior testing confirmed the system resistance overtime. The sandwich demonstrated the capability for absorbing exudates (≈70 %) and exhibited a controlled release of Amp for up to 24 h. Antimicrobial testing was performed against Staphylococcus aureus and Escherichia coli, as representatives of Gram-positive and Gram-negative bacteria: >99 % elimination of bacteria. Cell cytotoxicity assessments showed high cytocompatibility levels, confirming the safety of the proposed sandwich system. Adhesion assays confirmed the system ease of detaching without mechanical effort (0.37 N). Data established the efficiency of the sandwich-like system, suggesting promising applications in infected wound care.
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Affiliation(s)
- Ana R M Ribeiro
- Centre for Textile Science and Technology (2C2T), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - Marta O Teixeira
- Centre for Textile Science and Technology (2C2T), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - Lara Ribeiro
- Centre for Textile Science and Technology (2C2T), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal; Centre of Biological Engineering (CEB), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Tânia D Tavares
- Centre for Textile Science and Technology (2C2T), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - Catarina S Miranda
- Centre for Textile Science and Technology (2C2T), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - André F Costa
- Centre of Biological Engineering (CEB), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Artur Ribeiro
- Centre of Biological Engineering (CEB), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - M Manuela Silva
- Centre of Chemistry, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Carla Silva
- Centre of Biological Engineering (CEB), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Helena P Felgueiras
- Centre for Textile Science and Technology (2C2T), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal.
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12
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Allison KN, Mejlaoui R, DeZeeuw KG, Marek JE, Cassol E, Overhage J. Draft genome sequence of a methicillin-resistant Staphylococcus aureus strain isolated from a chronic wound. Microbiol Resour Announc 2024:e0043124. [PMID: 39177368 DOI: 10.1128/mra.00431-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Accepted: 07/26/2024] [Indexed: 08/24/2024] Open
Abstract
We report the draft genome sequence and antimicrobial resistance gene profile of a methicillin-resistant Staphylococcus aureus (MRSA) clinical isolate recovered from a chronic pressure injury wound infection of an adult female patient. The draft genome sequence included a 2.86-Mb chromosome, which was accompanied by a 27-kb plasmid containing blaZ.
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Affiliation(s)
- Kira N Allison
- Department of Health Sciences, Carleton University, Ottawa, Ontario, Canada
| | - Rayhane Mejlaoui
- Department of Health Sciences, Carleton University, Ottawa, Ontario, Canada
| | - Katrina G DeZeeuw
- Department of Complex Continuing Care, Saint Vincent Hospital, Ottawa, Ontario, Canada
| | - Jonah E Marek
- Department of Complex Continuing Care, Saint Vincent Hospital, Ottawa, Ontario, Canada
| | - Edana Cassol
- Department of Health Sciences, Carleton University, Ottawa, Ontario, Canada
| | - Joerg Overhage
- Department of Health Sciences, Carleton University, Ottawa, Ontario, Canada
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13
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Rajchakit U, Glossop HD, Wang K, Lu J, Sarojini V. Rational design of self-assembling ultrashort peptides for the shape- and size-tunable synthesis of metal nanostructures. J Pept Sci 2024:e3651. [PMID: 39177026 DOI: 10.1002/psc.3651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2024] [Revised: 07/29/2024] [Accepted: 07/30/2024] [Indexed: 08/24/2024]
Abstract
Peptides have attracted great interest as platforms for the design of nanocomposite hydrogels due to their distinct bioactivity, biofunctionality and biocompatibility. Previously, we have reported on a family of peptides that self-assembled to form stabilised three-dimensional hydrogel networks, displaying potent antimicrobial activity. In this paper, we report on the use of these hydrogelator sequences and their analogues as stabilisers and growth controllers to synthesise anisotropic gold nanoparticles (AuNPs) of different sizes and shapes. In particular, hollow spherical nanoparticles were obtained for HG2.81-AuNPs, whereas hexagonal nanoparticles were observed for TOH_1N-AuNPs and PentaOH-AuNPs in their respective hydrogel networks. The PentaOH-AuNPs' hydrogel exhibited excellent results with high antimicrobial potency against Staphylococcus aureus and Pseudomonas aeruginosa ATCC 27853 and negligible cytotoxicity. On the other hand, TOH_1N-AuNPs showed no antibacterial activity and no cytotoxicity, demonstrating the versatility of these peptides. This work gives credence towards the development of these materials towards further applications such as in tissue culture technology and wound dressing materials.
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Affiliation(s)
- Urawadee Rajchakit
- School of Chemical Sciences and The Centre for Green Chemical Science, University of Auckland, Auckland, New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, New Zealand
| | - Hugh Douglas Glossop
- School of Chemical Sciences and The Centre for Green Chemical Science, University of Auckland, Auckland, New Zealand
- Department of Biomedical Engineering, Pennsylvania State University, University Park, PA, USA
| | - Kelvin Wang
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Jun Lu
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Vijayalekshmi Sarojini
- School of Chemical Sciences and The Centre for Green Chemical Science, University of Auckland, Auckland, New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, New Zealand
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14
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Saha D, Dey T, Pal I, Kundu A, Majumdar S, Sadhu S, Yatirajula SK, Rath J, Ray SK, Dey B. Solvent-Directed Bioactive Supramolecular Zinc(II)-Metallogels: Exploring Semiconducting Aptitudes of Fabricating p-n Junction and Schottky Devices. ACS APPLIED BIO MATERIALS 2024; 7:5609-5621. [PMID: 39074362 DOI: 10.1021/acsabm.4c00694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/31/2024]
Abstract
α-Ketoglutaric acid-based supramolecular Zn(II) metallogels in N,N'-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) solvent (i.e., Zn-α-Glu-DMF and Zn-α-Glu-DMSO) were successfully achieved. Zinc(II) acetate salt and α-ketoglutaric acid directed a three-dimensional noncovalent supramolecular network individually entrapped with N,N'-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) solvent to accomplish their respective semisolid flexible metallogel frameworks. The gel features of these synthesized materials were verified by rheological experiments such as amplitude sweep and frequency sweep measurements. The discrete morphological arrangements were analyzed for these metallogel samples through field emission scanning electron microscopic (FESEM) analysis. Highly stacked interconnected blocks of Zn-α-Glu-DMF with hierarchical arrays are found due to the occurrence of diverse noncovalent supramolecular interactions present in the metallogel framework. A distinct spherical shaped microstructure with interconnected hierarchical assembly has been observed for the FESEM pattern of Zn-α-Glu-DMSO. FTIR spectroscopic measurement was carried out to detect some important stretching vibrations of xerogel samples of different metallogels as well as gel-constructing chemical ingredients. A substantial amount of peak shifting of xerogel samples for both metallogels is observed in FTIR analysis, indicating the presence of different noncovalent interactions. ESI-mass analysis portrays a possible metallogel-constructing strategy. The antibacterial potentialities of both metallogels were investigated. These materials exhibited good antimicrobial efficacy toward Gram-positive and Gram-negative bacterial strains (including Escherichia coli, Bacillus cereus, Staphylococcus aureus, Listeria monocytogenes, and Salmonella typhimurium). Both synthesized metallogels were successfully implemented to fabricate the photoresponsive semiconducting diode. These materials offer excellent photodiode parameters including an ideality factor and rectification ratio (ON/OFF ratio). Synthesized metallogels are used to successfully fabricate photodiodes with an Al/p-Si/metallogel/Au structure. The ideality factors (η) for Zn-α-Glu-DMF and Zn-α-Glu-DMSO are found as 1.3 and 2.3, respectively, in dark conditions. The rectification ratios for Zn-α-Glu-DMF and Zn-α-Glu-DMSO metallogels are also determined, and these are found as 40 and 10, respectively.
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Affiliation(s)
- Deblina Saha
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Tamal Dey
- Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Indrajit Pal
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Anupam Kundu
- Department of Botany, Visva-Bharati University, Santiniketan 731235, India
| | - Santanu Majumdar
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
- Department of Chemistry, Seacom Skills University, Kendradangal, Bolpur, Birbhum 731236, West Bengal, India
| | - Subhajoy Sadhu
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Suresh Kumar Yatirajula
- Department of Chemical Engineering, Indian Institute of Technology (ISM) Dhanbad 826004, India
| | - Jnanendra Rath
- Department of Botany, Visva-Bharati University, Santiniketan 731235, India
| | - Samit K Ray
- Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Biswajit Dey
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
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15
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Jian T, Wang M, Hettige J, Li Y, Wang L, Gao R, Yang W, Zheng R, Zhong S, Baer MD, Noy A, De Yoreo JJ, Cai J, Chen CL. Self-Assembling and Pore-Forming Peptoids as Antimicrobial Biomaterials. ACS NANO 2024. [PMID: 39146502 DOI: 10.1021/acsnano.4c05250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Bacterial infections have been a serious threat to mankind throughout history. Natural antimicrobial peptides (AMPs) and their membrane disruption mechanism have generated immense interest in the design and development of synthetic mimetics that could overcome the intrinsic drawbacks of AMPs, such as their susceptibility to proteolytic degradation and low bioavailability. Herein, by exploiting the self-assembly and pore-forming capabilities of sequence-defined peptoids, we discovered a family of low-molecular weight peptoid antibiotics that exhibit excellent broad-spectrum activity and high selectivity toward a panel of clinically significant Gram-positive and Gram-negative bacterial strains, including vancomycin-resistant Enterococcus faecalis (VREF), methicillin-resistant Staphylococcus aureus (MRSA), methicillin-resistant Staphylococcus epidermidis (MRSE), Escherichia coli, Pseudomonas aeruginosa, and Klebsiella pneumoniae. Tuning the peptoid side chain chemistry and structure enabled us to tune the efficacy of antimicrobial activity. Mechanistic studies using transmission electron microscopy (TEM), bacterial membrane depolarization and lysis, and time-kill kinetics assays along with molecular dynamics simulations reveal that these peptoids kill both Gram-positive and Gram-negative bacteria through a membrane disruption mechanism. These robust and biocompatible peptoid-based antibiotics can provide a valuable tool for combating emerging drug resistance.
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Affiliation(s)
- Tengyue Jian
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Minghui Wang
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Jeevapani Hettige
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Yuhao Li
- Materials Science Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Lei Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Ruixuan Gao
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Wenchao Yang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Renyu Zheng
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Shengliang Zhong
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Marcel D Baer
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Aleksandr Noy
- Materials Science Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
- School of Natural Sciences, University of California, Merced, Merced, California 95343, United States
| | - James J De Yoreo
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Chun-Long Chen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
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16
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Her E, Han S, Ha SD. Development of poly(lactic acid)-based natural antimicrobial film incorporated with caprylic acid against Salmonella biofilm contamination in the meat industry. Int J Food Microbiol 2024; 425:110871. [PMID: 39178662 DOI: 10.1016/j.ijfoodmicro.2024.110871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 08/11/2024] [Accepted: 08/14/2024] [Indexed: 08/26/2024]
Abstract
Using a solvent-casting method, a poly(lactic acid) (PLA) film incorporated with caprylic acid (CA) was developed as an active packaging against Salmonella enterica ser. Typhimurium and S. enteritidis to reduce the risk of microbial contamination during distribution and storage of meat. According to the minimum inhibitory concentration (MIC) test results of the natural antimicrobial, CA was introduced at 0.6, 1.2, 2.4, and 4.8 % (v/v) into neat PLA. The biofilm inhibitory effect and antimicrobial efficacy of CA-PLA film against both Salmonella strains, as well as the intermolecular interactions and barrier properties of CA-PLA film, were evaluated. Biofilm formation was reduced to below the detection limit (<1.0 log CFU/cm2) for both S. typhimurium and S. enteritidis when co-cultured overnight with 4.8 % CA-PLA film. The 4.8 % CA-PLA film achieved maximum log reductions of 2.58 and 1.65 CFU/g for S. typhimurium and 2.59 and 1.76 CFU/g for S. enteritidis on inoculated chicken breast and beef stored at 25 °C overnight, respectively, without any quality (color and texture) losses. CA maintained its typical chemical structure in the film, as confirmed by attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectra. Furthermore, film surface morphology observations by field emission scanning electron microscopy (FESEM) showed that CA-PLA film was smoother than neat PLA film. No significant (P > 0.05) changes were observed for water vapor permeability and oxygen permeability by the addition of CA into PLA film, suggesting that CA-PLA film is a promising strategy for active packaging to control Salmonella contamination in the meat industry.
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Affiliation(s)
- Eun Her
- Department of Food Safety and Regulatory Science, Advanced Food Safety Research Group, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - Sangha Han
- Department of Food Safety and Regulatory Science, Advanced Food Safety Research Group, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - Sang-Do Ha
- Department of Food Safety and Regulatory Science, Advanced Food Safety Research Group, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea.
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17
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Jara-Medina NR, Cueva DF, Cedeño-Pinargote AC, Gualle A, Aguilera-Pesantes D, Méndez MÁ, Orejuela-Escobar L, Cisneros-Heredia DF, Cortez-Zambrano R, Miranda-Moyano N, Tejera E, Machado A. Eco-alternative treatments for Vibrio parahaemolyticus and V. cholerae biofilms from shrimp industry through Eucalyptus (Eucalyptus globulus) and Guava (Psidium guajava) extracts: A road for an Ecuadorian sustainable economy. PLoS One 2024; 19:e0304126. [PMID: 39137207 PMCID: PMC11321589 DOI: 10.1371/journal.pone.0304126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 05/07/2024] [Indexed: 08/15/2024] Open
Abstract
Understanding how environmental variables influence biofilm formation becomes relevant for managing Vibrio biofilm-related infections in shrimp production. Therefore, we evaluated the impact of temperature, time, and initial inoculum in the biofilm development of these two Vibrio species using a multifactorial experimental design. Planktonic growth inhibition and inhibition/eradication of Vibrio biofilms, more exactly V. parahaemolyticus (VP87 and VP275) and V. cholerae (VC112) isolated from shrimp farms were evaluated by Eucalyptus and Guava aqueous leaf extracts and compared to tetracycline and ceftriaxone. Preliminary results showed that the best growth conditions of biofilm development for V. parahaemolyticus were 24 h and 24°C (p <0.001), while V. cholerae biofilms were 72 h and 30°C (p <0.001). Multivariate linear regression ANOVA was applied using colony-forming unit (CFU) counting assays as a reference, and R-squared values were applied as goodness-of-fit measurements for biofilm analysis. Then, both plant extracts were analyzed with HPLC using double online detection by diode array detector (DAD) and mass spectrometry (MS) for the evaluation of their chemical composition, where the main identified compounds for Eucalyptus extract were cypellogin A, cypellogin B, and cypellocarpin C, while guavinoside A, B, and C compounds were the main compounds for Guava extract. For planktonic growth inhibition, Eucalyptus extract showed its maximum effect at 200 μg/mL with an inhibition of 75% (p < 0.0001) against all Vibrio strains, while Guava extract exhibited its maximum inhibition at 1600 μg/mL with an inhibition of 70% (p < 0.0001). Both biofilm inhibition and eradication assays were performed by the two conditions (24 h at 24°C and 72 h at 30°C) on Vibrio strains according to desirability analysis. Regarding 24 h at 24°C, differences were observed in the CFU counting between antibiotics and plant extracts, where both plant extracts demonstrated a higher reduction of viable cells when compared with both antibiotics at 8x, 16x, and 32x MIC values (Eucalyptus extract: 1600, 3200, and 6400 μg/mL; while Guava extract: 12800, 25600, and 52000 μg/mL). Concerning 72 h at 30°C, results showed a less notorious biomass inhibition by Guava leaf extract and tetracycline. However, Eucalyptus extract significantly reduced the total number of viable cells within Vibrio biofilms from 2x to 32x MIC values (400-6400 μg/mL) when compared to the same MIC values of ceftriaxone (5-80 μg/mL), which was not able to reduce viable cells. Eucalyptus extract demonstrated similar results at both growth conditions, showing an average inhibition of approximately 80% at 400 μg/mL concentration for all Vibrio isolates (p < 0.0001). Moreover, eradication biofilm assays demonstrated significant eradication against all Vibrio strains at both growth conditions, but biofilm eradication values were substantially lower. Both extract plants demonstrated a higher reduction of viable cells when compared with both antibiotics at 8x, 16x, and 32x MIC values at both growth sets, where Eucalyptus extract at 800 μg/mL reduced 70% of biomass and 90% of viable cells for all Vibrio strains (p < 0.0001). Overall results suggested a viable alternative against vibriosis in the shrimp industry in Ecuador.
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Affiliation(s)
- Nicolás Renato Jara-Medina
- Laboratorio de Bacteriología, Colegio de Ciencias Biológicas y Ambientales COCIBA, Instituto de Microbiología, Calle Diego de Robles y Pampite, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Dario Fernando Cueva
- Laboratorio de Bacteriología, Colegio de Ciencias Biológicas y Ambientales COCIBA, Instituto de Microbiología, Calle Diego de Robles y Pampite, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Ariana Cecibel Cedeño-Pinargote
- Laboratorio de Bacteriología, Colegio de Ciencias Biológicas y Ambientales COCIBA, Instituto de Microbiología, Calle Diego de Robles y Pampite, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Arleth Gualle
- Colegio de Ciencias e Ingenierías, Departamento de Ingeniería Química, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | | | - Miguel Ángel Méndez
- Colegio de Ciencias e Ingenierías, Departamento de Ingeniería Química, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Lourdes Orejuela-Escobar
- Colegio de Ciencias e Ingenierías, Departamento de Ingeniería Química, Universidad San Francisco de Quito USFQ, Quito, Ecuador
- Instituto de Investigaciones Biológicas y Ambientales BIÓSFERA, Universidad San Francisco de Quito USFQ, Quito, Ecuador
- Instituto de Investigaciones en Biomedicina, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Diego F. Cisneros-Heredia
- Colegio de Ciencias Biológicas y Ambientales, Instituto de Biodiversidad Tropical IBIOTROP, Herbario de Botánica Económica, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Rebeca Cortez-Zambrano
- Laboratorio de Bacteriología, Colegio de Ciencias Biológicas y Ambientales COCIBA, Instituto de Microbiología, Calle Diego de Robles y Pampite, Universidad San Francisco de Quito USFQ, Quito, Ecuador
- Colegio de Ciencias Biológicas y Ambientales, Instituto de Biodiversidad Tropical IBIOTROP, Herbario de Botánica Económica, Universidad San Francisco de Quito USFQ, Quito, Ecuador
- Facultad de Medicina Veterinaria, Universidad UTE, Quito, Ecuador
| | - Nelson Miranda-Moyano
- Colegio de Ciencias Biológicas y Ambientales, Instituto de Biodiversidad Tropical IBIOTROP, Herbario de Botánica Económica, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Eduardo Tejera
- Facultad de Ingeniería y Ciencias Agropecuarias Aplicadas, Grupo de Bioquimioinformática, Universidad de Las Américas (UDLA), Quito, Ecuador
| | - António Machado
- Laboratorio de Bacteriología, Colegio de Ciencias Biológicas y Ambientales COCIBA, Instituto de Microbiología, Calle Diego de Robles y Pampite, Universidad San Francisco de Quito USFQ, Quito, Ecuador
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Aouji M, Zirari M, Imtara H, Rkhaila A, Bouhaddioui B, Mothana RA, Noman OM, Tarayrah M, Bengueddour R. Exploring the Chemical Composition, Antioxidant, and Antibacterial Properties of Helix aspersa Müller Flesh Crude Extract: A Comprehensive Investigation. ACS OMEGA 2024; 9:34754-34764. [PMID: 39157072 PMCID: PMC11325497 DOI: 10.1021/acsomega.4c04042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Revised: 07/21/2024] [Accepted: 07/23/2024] [Indexed: 08/20/2024]
Abstract
Snail flesh is a highly nutritious and easily digestible food commonly integrated into the human diet. In this study, snails belonging to the Helix aspersa Müller species were used to determine their chemical composition and evaluate the antioxidant and antibacterial activities of their flesh using successive maceration extractions with three solvents of different polarities. Biomolecules were analyzed spectrophotometrically, and their chemical compositions were determined by using gas chromatography coupled with mass spectroscopy. The antioxidant activity was assessed using three tests: DPPH, iron-reducing power test, and total antioxidant activity. The ethanol extract was found to be the most effective, with a high yield and high biomolecule content compared with other extracts. The extracts showed a significant amount of antioxidants, ranging from 3.14 to 7.04 mg AAE g-1 of dry matter, according to the total antioxidant activity assay. The DPPH scavenging capacity showed a reduction of the radical, with inhibitory concentrations ranging from 507.07 to 829.49 μg mL-1. In contrast, the iron-reducing power ranged from 67.98 to 424.74 μg mL-1. All of the strains studied responded favorably to the antimicrobial effects of H. aspersa extracts, with a zone of inhibition ranging from 8.48 to 15.53 mm. Additionally, at approximately 15 mg mL-1, the ethanolic extract had the lowest minimum inhibitory concentration against Pseudomonas aeruginosa. H. aspersa Müller flesh is rich in biomolecules with antioxidant and antibacterial activities, which could justify its use as a natural product and in therapeutic applications in the food industry.
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Affiliation(s)
- Marouane Aouji
- Laboratory
of Natural Resources and Sustainable Development, Department of Biology,
Faculty of Sciences, Ibn Tofail University, BP 133, Kenitra 14000, Morocco
| | - Malak Zirari
- Laboratory
of Organic Chemistry Catalysis and Environment, Department of Chemistry,
Faculty of Sciences, Ibn Tofail University, BP 133, Kénitra 14000, Morocco
| | - Hamada Imtara
- Faculty
of Medicine, Arab American University Palestine, Jenin 44862, Palestine
| | - Amine Rkhaila
- Laboratory
of Plant, Animal and Agro-Industry Productions, Department of Biology,
Faculty of Sciences, Ibn Tofail University, BP 133, Kenitra 14000, Morocco
| | - Bouchra Bouhaddioui
- Laboratory
of Natural Resources and Sustainable Development, Department of Biology,
Faculty of Sciences, Ibn Tofail University, BP 133, Kenitra 14000, Morocco
| | - Ramzi A. Mothana
- Department
of Pharmacognosy, College of Pharmacy, King
Saud University, Riyadh 11451, Saudi Arabia
| | - Omar M. Noman
- Department
of Pharmacognosy, College of Pharmacy, King
Saud University, Riyadh 11451, Saudi Arabia
| | - Mahmoud Tarayrah
- National
Center for Research in Human Genomics, 2 Rue Gaston Cŕemieux, Evry Courcouronnes 91000, France
| | - Rachid Bengueddour
- Laboratory
of Natural Resources and Sustainable Development, Department of Biology,
Faculty of Sciences, Ibn Tofail University, BP 133, Kenitra 14000, Morocco
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19
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Kruk M, Ponder A, Horoszewicz J, Popławski D, Król K, Leszczyńska J, Jaworska D, Trząskowska M. By-product hazelnut seed skin characteristics and properties in terms of use in food processing and human nutrition. Sci Rep 2024; 14:18835. [PMID: 39138272 PMCID: PMC11322380 DOI: 10.1038/s41598-024-69900-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Accepted: 08/09/2024] [Indexed: 08/15/2024] Open
Abstract
The hazelnut seed skins (HSS) are by-products from roasting or blanching hazelnuts without direct second utilization. The generation of HSS creates an economic and environmental problem. The object of the study was a comprehensive analysis of the properties for reuse of HSS. Water extraction of industrial HSS was applied (water with sonication of the HSS for 10 min at 90 ℃). The extracts obtained were freeze-dried to facilitate analysis and future application. The HSS and their extracts were analysed. Polyphenols, antioxidants, allergens, antimicrobial properties and instrumental sensory analysis were examined. The total polyphenol content in the samples was 37.8-44.0 mg gallic acid equivalent g-1. Gallic acid was the major phenolic compound. The antioxidant capacity of the samples was 198.9-250.6 mg VCEAC g-1 (vitamin C equivalent) according to the ABTS method and 98.4-106.8 mg VCEAC g-1 in the DPPH method. The extracts inhibited all tested strains of pathogenic bacteria. Allergen content was reduced in HSS and the extracts. Instrumental sensory analysis showed differences between taste parameters and odour profile samples. HSS can be reused in food production as a bacteriostatic, antioxidant additive and sensory-creating factor due to various chemical compounds corresponding with taste and odour.
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Affiliation(s)
- Marcin Kruk
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences (WULS), Nowoursynowska St. 159c, 02-776, Warsaw, Poland.
| | - Alicja Ponder
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences (WULS), Nowoursynowska St. 159c, 02-776, Warsaw, Poland
| | - Joanna Horoszewicz
- Faculty of Human Nutrition, Warsaw, University of Life Sciences (WULS), Nowoursynowska St. 159c, 02-776, Warsaw, Poland
| | - Damian Popławski
- Faculty of Human Nutrition, Warsaw, University of Life Sciences (WULS), Nowoursynowska St. 159c, 02-776, Warsaw, Poland
| | - Katarzyna Król
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences (WULS), Nowoursynowska St. 159c, 02-776, Warsaw, Poland
| | - Joanna Leszczyńska
- Institute of General Food Chemistry, Faculty of Biotechnology and Food Sciences, Łódz University of Technology, Stefanowskiego St. 4/10, 90-924, Lodz, Poland
| | - Danuta Jaworska
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences (WULS), Nowoursynowska St. 159c, 02-776, Warsaw, Poland
| | - Monika Trząskowska
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences (WULS), Nowoursynowska St. 159c, 02-776, Warsaw, Poland.
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20
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Pathak R, Mallik SK, Patil PK, Shahi N, Kala K, Bhat RAH, Nadella RK, Pandey N, Pandey PK. Assessment of Single-Dose Pharmacokinetics of Oxolinic Acid in Rainbow Trout and Determination of In Vitro Antibacterial Activity Against Pathogenic Bacteria From Diseased Fish. J Vet Pharmacol Ther 2024. [PMID: 39120127 DOI: 10.1111/jvp.13477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 07/22/2024] [Accepted: 07/24/2024] [Indexed: 08/10/2024]
Abstract
In response to the heightened risk of bacterial diseases in fish farms caused by increased demand for fish consumption and subsequent overcrowding, researchers are currently investigating the efficacy and residue management of oxolinic acid (OA) as a treatment for bacterial infections in fish. This research is crucial for gaining a comprehensive understanding of the pharmacokinetics of OA. The present study investigates pharmacokinetics of OA in juvenile rainbow trout. The fish were given a 12 mg kg-1 dose of OA through their feed, and tissue samples were collected of the liver, kidney, gill, intestine, muscle, and plasma for analysis using LC-MS/MS. The highest concentrations of the drug were found in the gill (4096.55 μg kg-1) and intestine (11592.98 μg kg-1), with significant absorption also seen in the liver (0.36 L/h) and gill (0.07 L/h) (p < 0.05). The liver (0.21 L/h) and kidney (0.03 L/h) were found to be the most efficient (p < 0.05) at eliminating the drug. The study also confirmed the drug antimicrobial effectiveness against several bacterial pathogens, including Shewanella xiamenensis (0.25 μg mL-1), Lactococcus garvieae (1 μg mL-1), and Chryseobacterium aquaticum (4 μg mL-1). The study concludes significant variations among different fish tissues, with higher concentrations and longer half-lives observed in the kidney and intestine. The lowest MIC value recorded against major bacterial pathogens demonstrated its therapeutic potential in aquaculture. It also emphasizes the importance of understanding OA pharmacokinetics to optimize antimicrobial therapy in aquaculture.
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Affiliation(s)
- Richa Pathak
- ICAR-Directorate of Coldwater Fisheries Research (ICAR-DCFR), Nainital, Uttarakhand, India
| | - Sumanta Kumar Mallik
- ICAR-Directorate of Coldwater Fisheries Research (ICAR-DCFR), Nainital, Uttarakhand, India
| | - Prasanna Kumar Patil
- ICAR-Central Institute of Brackishwater Aquaculture (ICAR-CIBA), Chennai, Tamil Nadu, India
| | - Neetu Shahi
- ICAR-Directorate of Coldwater Fisheries Research (ICAR-DCFR), Nainital, Uttarakhand, India
| | - Krishna Kala
- ICAR-Directorate of Coldwater Fisheries Research (ICAR-DCFR), Nainital, Uttarakhand, India
| | - Raja Adil Hussain Bhat
- ICAR-Directorate of Coldwater Fisheries Research (ICAR-DCFR), Nainital, Uttarakhand, India
| | | | - Nityanand Pandey
- ICAR-Directorate of Coldwater Fisheries Research (ICAR-DCFR), Nainital, Uttarakhand, India
| | - Pramod Kumar Pandey
- ICAR-Directorate of Coldwater Fisheries Research (ICAR-DCFR), Nainital, Uttarakhand, India
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21
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Ladva DN, Selvadoss PP, Chitroda GK, Dhanasekaran S, Nellore J, Tippabathani J, Solomon SM. Maleimide conjugated PEGylated liposomal antibiotic to combat multi-drug resistant Escherichia coli and Klebsiella pneumoniae with enhanced wound healing potential. Sci Rep 2024; 14:18361. [PMID: 39112534 PMCID: PMC11306640 DOI: 10.1038/s41598-024-68647-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Accepted: 07/25/2024] [Indexed: 08/10/2024] Open
Abstract
Antibiotic resistance is a significant threat, leaving us vulnerable to bacterial infections. Novel strategies are needed to combat bacterial resistance beyond discovering new antibiotics. This research focuses on using maleimide conjugated PEGylated liposomes (Mal-PL-Ab) to individually encapsulate a variety of antibiotics (ceftriaxone, cephalexin, doxycycline, piperacillin, ampicillin, and ceftazidime) and enhance their delivery against multi-drug resistant (MDR) bacteria like Escherichia coli (E. coli) and Klebsiella pneumoniae (K. pneumoniae). Mal-PL-Ab, with an average size of 84.2 nm ± 4.32 nm, successfully encapsulated these antibiotics with an encapsulation efficiency of 37.73 ± 3.19%. Compared to non-PEGylated liposomes (L-Ab), Mal-PL-Ab exhibited reduced toxicity in human dermal cells, emphasizing the importance of PEGylation in minimizing adverse effects. Mal-PL-Ab significantly decreased the minimum inhibitory concentration (MIC) values against both E. coli and K. pneumoniae by 9.33-fold and eightfold reduction (compared to non-PEGylated liposomes with 2.33-fold and 2.33fold reduction), respectively, indicating enhanced efficacy against MDR strains. Furthermore, in vitro scratch assay and gene expression analysis of human dermal fibroblast revealed that Mal-PL-Ab promoted cell proliferation, migration, and wound healing through upregulation of cell cycle, DNA repair, and angiogenesis-related genes. Harnessing the power of encapsulation, Mal-PL-Ab presents a novel avenue for enhanced antibiotic delivery and wound healing, potentially transcending the limitations of traditional options.
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Affiliation(s)
- Darshan Narendrabhai Ladva
- Department of Chemistry, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, Gujarat, 382426, India
| | - Pradeep Pushparaj Selvadoss
- Department of Biotechnology, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, Gujarat, 382426, India.
| | - Grishma Kantibhai Chitroda
- Department of Chemistry, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, Gujarat, 382426, India
| | - Sivaraman Dhanasekaran
- Department of Biotechnology, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, Gujarat, 382426, India
| | - Jayshree Nellore
- Department of Biotechnology, Sathyabama Institute of Science and Technology, Chennai, Tamil Nadu, 600119, India
| | | | - Sundar Manoharan Solomon
- Department of Chemistry, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, Gujarat, 382426, India.
- Department of Biotechnology, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, Gujarat, 382426, India.
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22
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Mady MS, Sobhy Y, Orabi A, Sharaky M, Mina SA, Abo-Zeid Y. Preparation and characterization of nano-emulsion formulations of Asparagus densiflorus root and aerial parts extracts: evaluation of in-vitro antibacterial and anticancer activities of nano-emulsion versus pure plant extract. Drug Dev Ind Pharm 2024:1-13. [PMID: 39093556 DOI: 10.1080/03639045.2024.2386001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Revised: 06/29/2024] [Accepted: 07/24/2024] [Indexed: 08/04/2024]
Abstract
OBJECTIVE Preparation and characterization of nano-emulsion formulations for Asparagus densiflorus aerial and root parts extracts. SIGNIFICANCE Genus Asparagus is known for its antimicrobial and anticancer activities, however, freeze dried powder of aqueous - alcoholic extract prepared in this study, exhibited a limited water solubility, limiting its therapeutic application. Thus, encapsulation of its phytochemicals into nano-emulsion is proposed as a solution to improve water solubility, and facilitate its clinical translation. METHODS the composition of extracts for both aerial and root parts of Asparagus densiflorus was identified by HPLC and LC-MS analysis. Nano-emulsion was prepared via homogenization where a mixture of Castor oil: phosphate buffered saline (10 mM, pH 7.4): Tween 80: PEG 600 in a ratio of 10: 5: 2.5: 2.5, respectively. Nano-emulsion formulations were characterized for particle size, polydispersity index (PDI), zeta potential, TEM, viscosity and pH. Then, the antibacterial and anticancer activities of nano-emulsion formulations versus their pure plant counterparts was assessed. RESULTS The analysis of extracts identified several flavonoids, phenolics, and saponins which were reported to have antimicrobial and anticancer activities. Nano-emulsion formulations were monodispersed with droplet sizes ranging from 80.27 ± 2.05 to 111.16 ± 1.97 nm, and polydispersity index ≤0.3. Nano-emulsion formulations enhanced significantly the antibacterial (multidrug resistant bacteria causing skin and dental soft tissues infections) and anticancer (HuH7, HEPG2, H460 and HCT116) activities compared to their pure plant extract counterparts. CONCLUSION Employing a nano-delivery system as a carrier for phytochemicals might be an effective strategy to enhance their pharmacological activity, overcome their limitations, and ultimately increase their potential for clinical applications.
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Affiliation(s)
- Mohamed S Mady
- Department of Pharmacognosy, Faculty of Pharmacy, Helwan University. Ain Helwan, Cairo, Egypt
| | - Yasmin Sobhy
- Department of Pharmacognosy, Faculty of Pharmacy, Helwan University. Ain Helwan, Cairo, Egypt
| | - Ahmed Orabi
- Microbiology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Marwa Sharaky
- Pharmacology Unit - Cancer Biology Department, National Cancer Institute, Cairo University, Cairo, Egypt
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Ahram Canadian University, Cairo, Egypt
| | - Suzan A Mina
- Department of Pharmacognosy, Faculty of Pharmacy, Helwan University. Ain Helwan, Cairo, Egypt
| | - Yasmin Abo-Zeid
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Helwan University, Cairo, Egypt
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23
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Miranda CS, Marinho E, Seabra CL, Evenou C, Lamartine J, Fromy B, Costa SPG, Homem NC, Felgueiras HP. Antimicrobial, antioxidant and cytocompatible coaxial wet-spun fibers made of polycaprolactone and cellulose acetate loaded with essential oils for wound care. Int J Biol Macromol 2024; 277:134565. [PMID: 39116984 DOI: 10.1016/j.ijbiomac.2024.134565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 07/29/2024] [Accepted: 08/05/2024] [Indexed: 08/10/2024]
Abstract
Chronic wounds represent a serious worldwide concern, being often associated with bacterial infections. As the prevalence of bacterial infections increase, it is crucial to search for alternatives. Essential oils (EOs) constitute a promising option to antibiotics due to their strong anti-inflammatory, analgesic, antioxidant and antibacterial properties. However, such compounds present high volatility. To address this issue, a drug delivery system composed of coaxial wet-spun fibers was engineered and different EOs, namely clove oil (CO), cinnamon leaf oil (CLO) and tea tree oil (TTO), were loaded. Briefly, a coaxial system composed of two syringe pumps, a coagulation bath of deionized water, a cylindrical-shaped collector and a coaxial spinneret was used. A 10 % w/v polycaprolactone (PCL) solution was combined with the different EOs at 2 × minimum bactericidal concentration (MBC) and loaded to a syringe connected to the inner port, whereas a 10 % w/v cellulose acetate (CA) solution mixed with 10 % w/v polyethylene glycol (PEG) at a ratio of 90:10 % v/v (to increase the fibers' elasticity) was loaded to the syringe connected to the outer port. This layer was used as a barrier to pace the release of the entrapped EO. The CA's inherent porosity in water coagulation baths allowed access to the fiber's core. CA was also mixed with 10 % w/v polyethylene glycol (PEG) at a ratio of 90:10 % v/v (CA:PEG), to increase the fibers' elasticity. Microfibers maintained their structural integrity during 28 days of incubation in physiological-like environments. They also showed high elasticities (maximum elongations at break >300 %) and resistance to rupture in mechanical assessments, reaching mass losses of only ≈ 2.29 % - 57.19 %. The EOs were released from the fibers in a prolonged and sustained fashion, in which ≈ 30 % of EO was released during the 24 h of incubation in physiological-like media, demonstrating great antibacterial effectiveness against Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli and Pseudomonas aeruginosa, the most prevalent bacteria in chronic wounds. Moreover, microfibers showed effective antioxidant effects, presenting up to 59 % of reduction of 2,2-diphenyl-1-picrylhydrazyl (DPPH) activity. Furthermore, the coaxial system was deemed safe for contact with fibroblasts and human keratinocytes, reaching metabolic activities higher than 80 % after 48 h of incubation. Data confirmed the suitability of the engineered system for potential therapeutics of chronic wounds.
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Affiliation(s)
- Catarina S Miranda
- Centre for Textile Science and Technology (2C2T), University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal.
| | - Elina Marinho
- Centre for Textile Science and Technology (2C2T), University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal.
| | - Catarina Leal Seabra
- Associate Laboratory for Green Chemistry (LAQV), Network of Chemistry and Technology (REQUIMTE), Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal.
| | - Camille Evenou
- Équipe Intégrité fonctionnelle du tissu cutané (SKIN). Laboratoire de biologie tissulaire et d'ingénierie thérapeutique (LBTI), CNRS UMR5305, Université Lyon I, 7 passage du Vercors, 69367 Lyon Cedex 07, France.
| | - Jérôme Lamartine
- Équipe Intégrité fonctionnelle du tissu cutané (SKIN). Laboratoire de biologie tissulaire et d'ingénierie thérapeutique (LBTI), CNRS UMR5305, Université Lyon I, 7 passage du Vercors, 69367 Lyon Cedex 07, France.
| | - Berengere Fromy
- Équipe Intégrité fonctionnelle du tissu cutané (SKIN). Laboratoire de biologie tissulaire et d'ingénierie thérapeutique (LBTI), CNRS UMR5305, Université Lyon I, 7 passage du Vercors, 69367 Lyon Cedex 07, France.
| | - Susana P G Costa
- Centre of Chemistry (CQ), University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal.
| | - Natália C Homem
- Simoldes Plastics S.A., Rua Comendador António da Silva Rodrigues, 165, 3720-193 Oliveira de Azeméis, Portugal.
| | - Helena P Felgueiras
- Centre for Textile Science and Technology (2C2T), University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal.
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24
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Pan D, Wu H, Li JJ, Wang B, Jia AQ. Two cinnamoyl hydroxamates as potential quorum sensing inhibitors against Pseudomonas aeruginosa. Front Cell Infect Microbiol 2024; 14:1424038. [PMID: 39165918 PMCID: PMC11333444 DOI: 10.3389/fcimb.2024.1424038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Accepted: 07/18/2024] [Indexed: 08/22/2024] Open
Abstract
Introduction Pseudomonas aeruginosa is a ubiquitous pathogen that causes various infectious diseases through the regulation of quorum sensing (QS). The strategy of interfering with the QS systems of P. aeruginosa, coupled with a reduction in the dosage of conventional antibiotics, presents a potential solution to treating infection and mitigating antibiotic resistance. In this study, seven cinnamoyl hydroxamates were synthesized to evaluate their inhibitory effects on QS of P. aeruginosa. Among these cinnamic acid derivatives, we found cinnamoyl hydroxamic acid (CHA) and 3-methoxy-cinnamoyl hydroxamic acid (MCHA) were the two most effective candidates. Furtherly, the effect of CHA and MCHA on the production of virulence factors and biofilm of P. aeruginosa were evaluated. Ultimately, our study may offer promising potential for treating P. aeruginosa infections and reducing its virulence. Methods The disc diffusion test were conducted to evaluate inhibitory effects on QS of seven cinnamoyl hydroxamates. The influence of CHA and MCHA on the production of virulence and flagellar motility of P. aeruginosa was furtherly explored. Scanning electron microscopy (SEM) experiment were conducted to evaluate the suppression of CHA and MCHA on the formed biofilm of P. aeruginosa. RT-qPCR was used to detect rhlI, lasA, lasB, rhlA, rhlB, and oprL genes in P. aeruginosa. In silico docking study was performed to explore the molecular mechanism of CHA and MCHA. The synergistic effects of CHA with gentamicin were detected on biofilm cell dispersal. Result After treatment of CHA or MCHA, the production of multiple virulence factors, including pyocyanin, proteases, rhamnolipid, and siderophore, and swimming and swarming motilities in P. aeruginosa were inhibited significantly. And our results showed CHA and MCHA could eliminate the formed biofilm of P. aeruginosa. RT-qPCR revealed that CHA and MCHA inhibited the expression of QS related genes in P. aeruginosa. Molecular docking indicated that CHA and MCHA primarily inhibited the RhlI/R system in P. aeruginosa by competing with the cognate signaling molecule C4-HSL.Additionally, CHA exhibited potent synergistic effects with gentamicin on biofilm cell dispersal. Discussion P. aeruginosa is one of the most clinically and epidemiologically important bacteria and a primary cause of catheter-related urinary tract infections and ventilator-associated pneumonia. This study aims to explore whether cinnamoyl hydroxamates have inhibitory effects on QS. And our results indicate that CHA and MCHA, as two novel QSIs, offer promising potential for treating P. aeruginosa infections and reducing its virulence.
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Affiliation(s)
- Deng Pan
- Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
- Key Laboratory of Tropical Biological Resources of Ministry of Education, School of Pharmaceutical Sciences, Hainan University, Haikou, China
| | - Hua Wu
- Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Jun-Jian Li
- Key Laboratory of Tropical Biological Resources of Ministry of Education, School of Pharmaceutical Sciences, Hainan University, Haikou, China
| | - Bo Wang
- Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Ai-Qun Jia
- Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
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25
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Chandrika K, Sachan A. Biosynthesis of bacteriocin BacZY05-silver nanoconjugates and evaluation of their antibacterial properties. World J Microbiol Biotechnol 2024; 40:287. [PMID: 39090427 DOI: 10.1007/s11274-024-04093-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Accepted: 07/22/2024] [Indexed: 08/04/2024]
Abstract
Bacteriocins are antimicrobial peptides produced by bacteria to prevent the growth of pathogens. Combining bacteriocins with metal nanoparticles, like silver nanoparticles (AgNPs), has developed into a viable strategy to get over bacteriocin limitations. In this study, bacteriocin BacZY05 was extracted from Bacillus subtilis ZY05 and purified using various techniques. The resulting purified bacteriocin was then combined with silver nanoparticles to form bacteriocin silver nanoconjugates (BacZY05-AgNPs). The physicochemical properties of the BacZY05-AgNPs were characterized using various analytical techniques. The mean diameter of the synthesized AgNPs was approximately 20-60 nm with an oval or spherical shape. The antimicrobial activity of the BacZY05-AgNPs was evaluated against several indicator strains by their zone of inhibition (ZOI), using the agar well diffusion method. Compared to bacteriocin (ZOI- 13 to 20 mm) and AgNPs (ZOI- 10-22 mm) alone, the antibacterial activity data demonstrated a 1.3-1.5-fold increase in the activity of bacteriocin-nanoconjugates (ZOI- 22 to 26 mm). For Staphylococcus aureus MTCC3103 and Klebsiella pneumoniae MTCC109, BacZY05-capped AgNPs exhibited the lowest minimum inhibitory concentration (MIC), measuring 10.93 µg/mL. For Salmonella typhi NCIM2501, the MIC was 28.75 µg/mL. The highest MIC value was 57.5 µg/mL for Escherichia coli DH5α and Vibrio cholerae MTCC3909. With BacZY05-capped AgNPs, the lowest minimum bactericidal concentration (MBC) of 28.75 µg/mL was observed for Staphylococcus aureus MTCC31003. In the cases of Salmonella typhi NCIM2501 and Klebsiella pneumoniae MTCC109 concentration was 57.5 µg/mL. Vibrio cholerae MTCC3909 and Escherichia coli DH5α had the highest MBC values at 115 µg/mL.
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Affiliation(s)
- Kumari Chandrika
- Department of Life Sciences, Central University of Jharkhand, Jharkhand, Ranchi, 835 222, India
| | - Ashish Sachan
- Department of Life Sciences, Central University of Jharkhand, Jharkhand, Ranchi, 835 222, India.
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Wang Z, Zhou H, Cheng Y, An L, Yan D, Chao H, Wu J. Novel small multidrug resistance protein Tmt endows the Escherichia coli with triphenylmethane dyes bioremediation capability. Biotechnol Lett 2024; 46:627-639. [PMID: 38662307 DOI: 10.1007/s10529-024-03480-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/23/2024] [Accepted: 03/10/2024] [Indexed: 04/26/2024]
Abstract
Dye contamination in printing and dyeing wastewater has long been a major concern due to its serious impact on both the environment and human health. In the quest for bioremediation of these hazardous dyes, biological resources such as biodegradation bacteria and enzymes have been investigated in severely polluted environments. In this context, the triphenylmethane transporter gene (tmt) was identified in six distinct clones from a metagenomic library of the printing and dyeing wastewater treatment system. Escherichia coli expressing tmt revealed 98.1% decolorization efficiency of triphenylmethane dye malachite green within 24 h under shaking culture condition. The tolerance to malachite green was improved over eightfold in the Tmt strain compared of the none-Tmt expressed strain. Similarly, the tolerance of Tmt strain to other triphenylmethane dyes like crystal violet and brilliant green, was improved by at least fourfold. Site-directed mutations, including A75G, A75S and V100G, were found to reinforce the tolerance of malachite green, and double mutations of these even further improve the tolerance. Therefore, the tmt has been demonstrated to be a specific efflux pump for triphenylmethane dyes, particularly the malachite green. By actively pumping out toxic triphenylmethane dyes, it significantly extends the cells tolerance in a triphenylmethane dye-rich environment, which may provide a promising strategy for bioremediation of triphenylmethane dye pollutants in the environments.
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Affiliation(s)
- Zhou Wang
- School of Life Science and Technology, Wuhan Polytechnic University, Wuhan, 430023, People's Republic of China
| | - Haoqiang Zhou
- School of Life Science and Technology, Wuhan Polytechnic University, Wuhan, 430023, People's Republic of China
| | - Yilan Cheng
- School of Life Science and Technology, Wuhan Polytechnic University, Wuhan, 430023, People's Republic of China
| | - Lijin An
- School of Life Science and Technology, Wuhan Polytechnic University, Wuhan, 430023, People's Republic of China
| | - Dazhong Yan
- School of Life Science and Technology, Wuhan Polytechnic University, Wuhan, 430023, People's Republic of China
| | - Hongjun Chao
- School of Life Science and Technology, Wuhan Polytechnic University, Wuhan, 430023, People's Republic of China
| | - Jing Wu
- School of Life Science and Technology, Wuhan Polytechnic University, Wuhan, 430023, People's Republic of China.
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Kaszecki E, Palberg D, Grant M, Griffin S, Dhanjal C, Capperauld M, Emery RJN, Saville BJ. Euglena mutabilis exists in a FAB consortium with microbes that enhance cadmium tolerance. Int Microbiol 2024; 27:1249-1268. [PMID: 38167969 PMCID: PMC11300505 DOI: 10.1007/s10123-023-00474-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/29/2023] [Accepted: 12/15/2023] [Indexed: 01/05/2024]
Abstract
BACKGROUND Synthetic algal-fungal and algal-bacterial cultures have been investigated as a means to enhance the technological applications of the algae. This inclusion of other microbes has enhanced growth and improved stress tolerance of the algal culture. The goal of the current study was to investigate natural microbial consortia to gain an understanding of the occurrence and benefits of these associations in nature. The photosynthetic protist Euglena mutabilis is often found in association with other microbes in acidic environments with high heavy metal (HM) concentrations. This may suggest that microbial interactions are essential for the protist's ability to tolerate these extreme environments. Our study assessed the Cd tolerance of a natural fungal-algal-bacterial (FAB) association whereby the algae is E. mutabilis. RESULTS This study provides the first assessment of antibiotic and antimycotic agents on an E. mutabilis culture. The results indicate that antibiotic and antimycotic applications significantly decreased the viability of E. mutabilis cells when they were also exposed to Cd. Similar antibiotic treatments of E. gracilis cultures had variable or non-significant impacts on Cd tolerance. E. gracilis also recovered better after pre-treatment with antibiotics and Cd than did E. mutabilis. The recoveries were assessed by heterotrophic growth without antibiotics or Cd. In contrast, both Euglena species displayed increased chlorophyll production upon Cd exposure. PacBio full-length amplicon sequencing and targeted Sanger sequencing identified the microbial species present in the E. mutabilis culture to be the fungus Talaromyces sp. and the bacterium Acidiphilium acidophilum. CONCLUSION This study uncovers a possible fungal, algal, and bacterial relationship, what we refer to as a FAB consortium. The members of this consortium interact to enhance the response to Cd exposure. This results in a E. mutabilis culture that has a higher tolerance to Cd than the axenic E. gracilis. The description of this interaction provides a basis for explore the benefits of natural interactions. This will provide knowledge and direction for use when creating or maintaining FAB interactions for biotechnological purposes, including bioremediation.
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Affiliation(s)
- Emma Kaszecki
- Environmental and Life Science Graduate Program, Trent University, Peterborough, ON, Canada
| | - Daniel Palberg
- Environmental and Life Science Graduate Program, Trent University, Peterborough, ON, Canada
| | - Mikaella Grant
- Environmental and Life Science Graduate Program, Trent University, Peterborough, ON, Canada
| | - Sarah Griffin
- Forensic Science Department, Trent University, Peterborough, ON, Canada
| | - Chetan Dhanjal
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | | | - R J Neil Emery
- Environmental and Life Science Graduate Program, Trent University, Peterborough, ON, Canada
- Department of Biology, Trent University, Peterborough, ON, Canada
| | - Barry J Saville
- Environmental and Life Science Graduate Program, Trent University, Peterborough, ON, Canada.
- Forensic Science Department, Trent University, Peterborough, ON, Canada.
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28
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Shao C, Wang Y, Li G, Guan H, Zhu Y, Zhang L, Dong N, Shan A. Novel design of simplified β-hairpin antimicrobial peptide as a potential food preservative based on Trp-pocket backbone. Food Chem 2024; 448:139128. [PMID: 38574714 DOI: 10.1016/j.foodchem.2024.139128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 03/09/2024] [Accepted: 03/22/2024] [Indexed: 04/06/2024]
Abstract
Food contamination from microbial deterioration requires the development of potent antimicrobial peptides (AMPs). The deployment of approved AMPs as dietary preservatives is limited due to barriers such as instability, toxicity, and high synthetic costs. This exploration utilizes the primary structural elements of the Trp-pocket backbone to engineer a series of β-hairpin AMPs (XWRWRPGXKXXR-NH2, X representing I, V, F, and/or L). Peptides WpLF, with Phe as X and Leu arranged at the 11th position, demonstrated exceptional selectivity index (SI = 123.08) and sterilization effects both in vitro and in vivo. WpLF consistently exhibited stable bacteriostasis, regardless of physiological salts, serum, and extreme pH. Mechanistic analysis indicated that the peptide penetrates microbial cell membranes, inducing membrane disruption, thereby impeding drug resistance evolution. Conclusively, AMPs engineered by the Trp-pocket skeleton hold substantial potential as innovative biological preservatives in food preservation, providing valuable insights for sustainable and safe peptide-based food preservatives.
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Affiliation(s)
- Changxuan Shao
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, PR China
| | - Yuanmengxue Wang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, PR China
| | - Guoyu Li
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, PR China
| | - Hongrui Guan
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, PR China
| | - Yongjie Zhu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, PR China
| | - Licong Zhang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, PR China
| | - Na Dong
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, PR China
| | - Anshan Shan
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, PR China.
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Huang G, Wang Q, Wen H, Li J, He S, Wang X, Ding L. Antibiofilm Efficacy and Mechanism of the Marine Chlorinated Indole Sesquiterpene Against Methicillin-Resistant Staphylococcus aureus. Foodborne Pathog Dis 2024; 21:491-498. [PMID: 38900687 DOI: 10.1089/fpd.2024.0003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) can easily form biofilms on food surfaces, thus leading to cross-contamination, which is difficult to remove. Therefore, there is an urgent need to find alternatives with good antibacterial and antibiofilm effects. In this study, two indole sesquiterpene compounds, xiamycin (1) and chlorinated metabolite chloroxiamycin (2), were isolated from the fermentation liquid of marine Streptomyces sp. NBU3429 for the first time. The chemical structures of the two compounds were characterized by spectroscopic data interpretation, including 1D NMR and HRESIMS analysis. Antimicrobial test showed that chloroxiamycin (2) (minimum inhibitory concentration, MIC = 16 μg/mL) exhibited superior antibacterial activity than xiamycin (1) (MIC = 32 μg/mL) against MRSA ATCC43300. Moreover, compound (2) decreased the biofilm formation rate of MRSA ATCC43300 by 12.7%-84.6% in the concentration range of 32-512 μg/mL, which is relatively stronger than xiamycin (1) (4.1%-49.9%) as well. Antibacterial/antibiofilm mechanism investigation indicated that chloroxiamycin (2) could disrupt the cell wall and membrane of MRSA, inhibiting the production of biofilm extracellular polysaccharides. All these results illustrated that chloroxiamycin (2) is an effective antibacterial/antibiofilm agent, which makes it an attractive candidate for food preservatives.
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Affiliation(s)
- Guobao Huang
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Ningbo University, Ningbo, China
- Health Science Center, Ningbo University, Ningbo, China
| | - Qiang Wang
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Ningbo University, Ningbo, China
| | - Huimin Wen
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Ningbo University, Ningbo, China
| | - Jinling Li
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Ningbo University, Ningbo, China
| | - Shan He
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Ningbo University, Ningbo, China
- Health Science Center, Ningbo University, Ningbo, China
| | - Xiao Wang
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Ningbo University, Ningbo, China
- Health Science Center, Ningbo University, Ningbo, China
| | - Lijian Ding
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Ningbo University, Ningbo, China
- Health Science Center, Ningbo University, Ningbo, China
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30
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Zhang Y, Yan Y, Smagghe G, Yang H, Dai RH, Yang WJ. Identification and immune analysis of antimicrobial peptides from the cigarette beetle (Lasioderma serricorne). INSECT SCIENCE 2024; 31:1121-1134. [PMID: 37984503 DOI: 10.1111/1744-7917.13298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 11/22/2023]
Abstract
Antimicrobial peptides (AMPs) in insects are endogenous peptides that are effector components of the innate defense system of the insect. AMPs may serve as antimicrobial agents because of their small molecular weight and broad-spectrum antimicrobial activity. In this study, we performed transcriptome analysis of cigarette beetle (Lasioderma serricorne) larvae, parasitized by the ectoparasitic wasp, Anisopteromalus calandrae. Several AMP genes were significantly upregulated following A. calandrae parasitism, postulating the hypothesis that the parasitization enhanced the host's resistance against pathogenic microorganisms through the regulation of host AMP genes. Specifically, 3 AMP genes (LsDef1, LsDef2, and LsCole) were significantly upregulated and we studied their immune function in L. serricorne. Immune challenge and functional analysis showed that LsCole was responsible for the immune response against Gram-negative and Gram-positive bacteria, while LsDef1 and LsDef2 were involved in insect defense against Gram-positive bacteria. Purified recombinant LsCole exhibited antimicrobial activities against the Gram-negative bacterium Escherichia coli and the Gram-positive bacterium Staphylococcus aureus. LsDef2 showed an antibacterial effect against S. aureus. LsCole and LsDef2 exhibited antibiofilm activity against S. aureus. The 2 AMPs disrupted cell membranes and caused leakage of S. aureus cell contents. The results indicated that the 3 AMPs in L. serricorne are involved in the innate immunity of this pest insect. These AMPs may have potential as antimicrobial agents for bacterial infection chemotherapy. Hence, data are discussed in relation to new control strategies with greater biosafety against pest insects with use of microbial biocontrol agents in combination with RNA interference against the insect's defensive AMP genes.
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Affiliation(s)
- Yue Zhang
- Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Guizhou University, Guiyang, China
| | - Yi Yan
- Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Guizhou University, Guiyang, China
- Guizhou Provincial Key Laboratory for Rare Animal and Economic Insect of the Mountainous Region, College of Biology and Environmental Engineering, Guiyang University, Guiyang, China
| | - Guy Smagghe
- Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Guizhou University, Guiyang, China
| | - Hong Yang
- Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Guizhou University, Guiyang, China
| | - Ren-Huai Dai
- Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Guizhou University, Guiyang, China
| | - Wen-Jia Yang
- Guizhou Provincial Key Laboratory for Rare Animal and Economic Insect of the Mountainous Region, College of Biology and Environmental Engineering, Guiyang University, Guiyang, China
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31
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Wang S, Deng S, Wang Y. Theaflavin-3,3'-digallate effectively attenuates biofilm formation by Enterococcus faecalis via the targeting of specific quorum sensing pathways. Microb Pathog 2024; 193:106739. [PMID: 38857709 DOI: 10.1016/j.micpath.2024.106739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 04/28/2024] [Accepted: 06/07/2024] [Indexed: 06/12/2024]
Abstract
Enterococcus faecalis, an opportunistic pathogen responsible for nosocomial infections, exhibits increased pathogenicity via biofilm formation. Theaflavin-3,3'-digallate (TF3), a theaflavin extracted from black tea, exhibits potent antibacterial effects. In the present study, we investigated the inhibitory effect of TF3 on E. faecalis. Our results indicated that TF3 significantly inhibited E. faecalis ATCC 29212 biofilm formation. This observation was further confirmed via crystal violet staining, confocal laser scanning microscopy, and field emission-scanning electron microscopy. To disclose the underlying mechanisms, RNA-seq was applied. TF3 treatment significantly altered the transcriptomic profile of E. faecalis, as evidenced by identification of 248 differentially expressed genes (DEGs). Through functional annotation of these DEGs, several quorum-sensing pathways were found to be suppressed in TF3-treated cultures. Further, gene expression verification via real-time PCR confirmed the downregulation of gelE, sprE, and secY by TF3. These findings highlighted the ability of TF3 to impede E. faecalis biofilm formation, suggesting a novel preventive strategy against E. faecalis infections.
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Affiliation(s)
- Sa Wang
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China; Key Laboratory of Oral Biomedical Research of Zhejiang Province, Zhejiang University School of Stomatology, Hangzhou, Zhejiang, China
| | - Shuli Deng
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China; Key Laboratory of Oral Biomedical Research of Zhejiang Province, Zhejiang University School of Stomatology, Hangzhou, Zhejiang, China
| | - Ying Wang
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China; Key Laboratory of Oral Biomedical Research of Zhejiang Province, Zhejiang University School of Stomatology, Hangzhou, Zhejiang, China.
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32
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Kozyra M, Biernasiuk A, Gryta E, Kozyra P, Malm A. Phytochemical Profiling and Biological Activity of the Methanolic Extracts of Cirsium Monspessulanum (L.) Hill. Chem Biodivers 2024; 21:e202400944. [PMID: 38828873 DOI: 10.1002/cbdv.202400944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/20/2024] [Accepted: 06/03/2024] [Indexed: 06/05/2024]
Abstract
The study of new plant species and the identification of their chemical composition may contribute to the discovery of a new breakthrough substances for pharmacotherapeutical applications. For the first time, we examined antioxidant and antimicrobial activity of 70 % v/v methanolic extracts from inflorescences and roots of Cirsium monspessulanum (L.) Hill. obtained by the ASE method. In the (2,2-diphenyl-1-picrylhydrazyl) DPPH analysis, tested extract of inflorescences showed antioxidant activity with an EC50=0.223±0.0479 mg/mL, and (Cupric Ion Reducting Antioxidant Capacity) CUPRAC test assessed the antiradical activity on 14.95±0.13 mgTE/g and for roots the values were EC50=0.307±0.0554 mg/mL and 11.18±0.49 mgTE/g, respectively. Furthermore, extract from the inflorescences possessed the highest antimicrobial activity against Staphylococcus aureus, Staphylococcus epidermidis and Micrococcus luteus with MIC=1.25 mg/mL for each. HPLC/ESI-QTOF-MS/MS method identified 7 phenolic acids and 14 flavonoids in inflorescences extract and only 7 phenolic acids in roots extract. To the best of our knowledge, this is the first qualitative analysis of Cirsium monspessulanum (L.) Hill. and all substances were described for the first time.
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Affiliation(s)
- Małgorzata Kozyra
- Department of Pharmacognosy with the Medicinal Plant Garden, Medical University of Lublin, PL-20093, Lublin, Poland
| | - Anna Biernasiuk
- Department of Pharmaceutical Microbiology, Medical University of Lublin, PL-20093, Lublin, Poland
| | - Elżbieta Gryta
- Department of Pharmacognosy with the Medicinal Plant Garden, Medical University of Lublin, PL-20093, Lublin, Poland
| | - Paweł Kozyra
- Independent Radiopharmacy Unit, Faculty of Pharmacy, Medical University of Lublin, PL-20093, Lublin, Poland
| | - Anna Malm
- Department of Pharmaceutical Microbiology, Medical University of Lublin, PL-20093, Lublin, Poland
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Kim TH, Kang J, Jang H, Joo H, Lee GY, Kim H, Cho U, Bang H, Jang J, Han S, Kim DY, Lee CM, Kang CK, Choe PG, Kim NJ, Oh MD, Kim TS, Kim I, Park WB, Kwon S. Blood culture-free ultra-rapid antimicrobial susceptibility testing. Nature 2024; 632:893-902. [PMID: 39048820 DOI: 10.1038/s41586-024-07725-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 06/17/2024] [Indexed: 07/27/2024]
Abstract
Treatment assessment and patient outcome for sepsis depend predominantly on the timely administration of appropriate antibiotics1-3. However, the clinical protocols used to stratify and select patient-specific optimal therapy are extremely slow4. In particular, the major hurdle in performing rapid antimicrobial susceptibility testing (AST) remains in the lengthy blood culture procedure, which has long been considered unavoidable due to the limited number of pathogens present in the patient's blood. Here we describe an ultra-rapid AST method that bypasses the need for traditional blood culture, thereby demonstrating potential to reduce the turnaround time of reporting drug susceptibility profiles by more than 40-60 h compared with hospital AST workflows. Introducing a synthetic beta-2-glycoprotein I peptide, a broad range of microbial pathogens are selectively recovered from whole blood, subjected to species identification or instantly proliferated and phenotypically evaluated for various drug conditions using a low-inoculum AST chip. The platform was clinically evaluated by the enrolment of 190 hospitalized patients suspected of having infection, achieving 100% match in species identification. Among the eight positive cases, six clinical isolates were retrospectively tested for AST showing an overall categorical agreement of 94.90% with an average theoretical turnaround time of 13 ± 2.53 h starting from initial blood processing.
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Affiliation(s)
- Tae Hyun Kim
- Bio-MAX Institute, Seoul National University, Seoul, Korea
- Department of Electrical and Computer Engineering, Seoul National University, Seoul, Korea
| | - Junwon Kang
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, Korea
- Integrated Major in Innovative Medical Science, Seoul National University, Seoul, Korea
| | - Haewook Jang
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, Korea
| | - Hyelyn Joo
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, Korea
| | - Gi Yoon Lee
- Department of Electrical and Computer Engineering, Seoul National University, Seoul, Korea
| | - Hamin Kim
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, Korea
| | | | | | | | | | | | - Chan Mi Lee
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Chang Kyung Kang
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Pyoeng Gyun Choe
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Nam Joong Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Myoung-Don Oh
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Taek Soo Kim
- Department of Laboratory Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Inho Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
| | - Wan Beom Park
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
| | - Sunghoon Kwon
- Bio-MAX Institute, Seoul National University, Seoul, Korea.
- Department of Electrical and Computer Engineering, Seoul National University, Seoul, Korea.
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, Korea.
- QuantaMatrix Inc., Seoul, Korea.
- Inter-University Semiconductor Research Center, Seoul National University, Seoul, Korea.
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Papageorgiou M, Kitsou I, Gkomoza P, Alivisatou AA, Papaparaskevas J, Tsetsekou A. Bioinspired synthesis of multifunctional, highly stable polymeric templated silver-silica colloids as catalytic and antibacterial coatings for paper. Colloids Surf B Biointerfaces 2024; 240:113997. [PMID: 38815309 DOI: 10.1016/j.colsurfb.2024.113997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 04/29/2024] [Accepted: 05/27/2024] [Indexed: 06/01/2024]
Abstract
In this paper, a simple, bottom up, bioinspired technique is proposed for the synthesis of highly stable colloids of silica supported spherical silver nanoparticles (SiO2@Ag) that act as efficient catalytic and antimicrobial coatings for an organic substrate, filter paper. The core - shell structure and the highly branched dendritic polymer, poly(ethylene)imine, enabled the precise control of growth rate and morphology of silica and silver nanoparticles. The polymer also enabled the deposition of these nanoparticles onto an organic substrate, filter paper, through immersion by modifying its surface. The catalytic and antibacterial properties of these samples were assessed. The results obtained from this analysis showed a complete degradation of an aqueous pollutant, 4-nitrophenol, for 6 successive catalytic cycles without intermediate purification steps. Furthermore, the polymeric silica-silver suspension proved to express antibacterial activity against both Gram-positive and Gram-negative bacteria (Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa). The antibacterial properties were evaluated according to the disk diffusion method, whereas the Minimum Inhibitory Concentration was also determined. The samples were examined by Scanning Electron Microscopy, Transmission Electron Microscopy, X-ray diffraction analysis, z-potential analysis, Fourier Transform Infrared Spectroscopy and Ultraviolet-visible Spectroscopy.
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Affiliation(s)
- Michaela Papageorgiou
- School of Mining & Metallurgical Engineering, National Technical University of Athens, Athens 106 82, Greece
| | - Ioanna Kitsou
- School of Mining & Metallurgical Engineering, National Technical University of Athens, Athens 106 82, Greece
| | - Paraskevi Gkomoza
- School of Mining & Metallurgical Engineering, National Technical University of Athens, Athens 106 82, Greece
| | | | - Joseph Papaparaskevas
- Microbiology Department, School of Medicine, National and Kapodistrian University of Athens, Athens 115 27, Greece
| | - Athena Tsetsekou
- School of Mining & Metallurgical Engineering, National Technical University of Athens, Athens 106 82, Greece.
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35
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Chand U, Kushawaha PK. Silibinin-loaded chitosan-capped silver nanoparticles exhibit potent antimicrobial, antibiofilm, and anti-inflammatory activity against drug-resistant nosocomial pathogens. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2024; 35:1771-1793. [PMID: 38787751 DOI: 10.1080/09205063.2024.2355744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024]
Abstract
Nanoparticles capped with natural products can be a cost-effective alternative to treat drug-resistant nosocomial infections. Therefore, silibinin-loaded chitosan-capped silver nanoparticles (S-C@AgNPs) were synthesized to evaluate their antimicrobial and anti-inflammatory potential. The S-C@AgNPs plasmon peak was found at 430 nm and had a particle size distribution of about 130 nm with an average hydrodynamic diameter of 101.37 nm. The Scanning Electron Microscopy images showed the presence of sphere-shaped homogeneous nanoparticles. The Fourier Transform Infrared Spectroscopy analysis confirmed the loading of silibinin and chitosan on the AgNPs surface. The minimum inhibitory concentration of the S-C@AgNPs was reported between 3.12 μg/ml to 12.5 μg/ml and a minimum bactericidal concentration between 6.25 μg/ml to 25 μg/ml against drug-resistant nosocomial pathogens. Moreover, concentration-dependent significant inhibition of the biofilm formation was reported against P. aeruginosa (70.21%) and K. pneumoniae (71.02%) at 30 μg/ml, and the highest destruction of preformed biofilm was observed at 100 μg/ml against P. aeruginosa (89.74%) and K. pneumoniae (77.65%) as compared to individual bacterial control. Additionally, the fluorescence live/dead assay for bacterial biofilm confirmed that 100 µg/ml effectively inhibits the biofilm formed by these pathogens. S-C@AgNPs also showed anti-inflammatory activity, which is evident by the significant decrease in the proinflammatory cytokines and chemokines level in THP1 cells treated with LPS. This study concluded that S-C@AgNPs have potent antimicrobial, antibiofilm, and anti-inflammatory properties and could be a potential option for treating drug resistant nosocomial infections.
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Affiliation(s)
- Umesh Chand
- Department of Microbiology, School of Basic Sciences, Central University of Punjab, Bathinda, Punjab, India
| | - Pramod Kumar Kushawaha
- Department of Microbiology, School of Basic Sciences, Central University of Punjab, Bathinda, Punjab, India
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Li C, Sutherland D, Richter A, Coombe L, Yanai A, Warren RL, Kotkoff M, Hof F, Hoang LMN, Helbing CC, Birol I. De novo synthetic antimicrobial peptide design with a recurrent neural network. Protein Sci 2024; 33:e5088. [PMID: 38988311 PMCID: PMC11237553 DOI: 10.1002/pro.5088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 05/16/2024] [Accepted: 06/10/2024] [Indexed: 07/12/2024]
Abstract
Antibiotic resistance is recognized as an imminent and growing global health threat. New antimicrobial drugs are urgently needed due to the decreasing effectiveness of conventional small-molecule antibiotics. Antimicrobial peptides (AMPs), a class of host defense peptides, are emerging as promising candidates to address this need. The potential sequence space of amino acids is combinatorially vast, making it possible to extend the current arsenal of antimicrobial agents with a practically infinite number of new peptide-based candidates. However, mining naturally occurring AMPs, whether directly by wet lab screening methods or aided by bioinformatics prediction tools, has its theoretical limit regarding the number of samples or genomic/transcriptomic resources researchers have access to. Further, manually designing novel synthetic AMPs requires prior field knowledge, restricting its throughput. In silico sequence generation methods are gaining interest as a high-throughput solution to the problem. Here, we introduce AMPd-Up, a recurrent neural network based tool for de novo AMP design, and demonstrate its utility over existing methods. Validation of candidates designed by AMPd-Up through antimicrobial susceptibility testing revealed that 40 of the 58 generated sequences possessed antimicrobial activity against Escherichia coli and/or Staphylococcus aureus. These results illustrate that AMPd-Up can be used to design novel synthetic AMPs with potent activities.
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Affiliation(s)
- Chenkai Li
- Canada's Michael Smith Genome Sciences CentreBC Cancer AgencyVancouverBritish ColumbiaCanada
- Bioinformatics Graduate ProgramUniversity of British ColumbiaVancouverBritish ColumbiaCanada
| | - Darcy Sutherland
- Canada's Michael Smith Genome Sciences CentreBC Cancer AgencyVancouverBritish ColumbiaCanada
- Public Health LaboratoryBritish Columbia Centre for Disease ControlVancouverBritish ColumbiaCanada
- Department of Pathology and Laboratory MedicineUniversity of British ColumbiaVancouverBritish ColumbiaCanada
| | - Amelia Richter
- Canada's Michael Smith Genome Sciences CentreBC Cancer AgencyVancouverBritish ColumbiaCanada
- Public Health LaboratoryBritish Columbia Centre for Disease ControlVancouverBritish ColumbiaCanada
| | - Lauren Coombe
- Canada's Michael Smith Genome Sciences CentreBC Cancer AgencyVancouverBritish ColumbiaCanada
| | - Anat Yanai
- Canada's Michael Smith Genome Sciences CentreBC Cancer AgencyVancouverBritish ColumbiaCanada
- Public Health LaboratoryBritish Columbia Centre for Disease ControlVancouverBritish ColumbiaCanada
| | - René L. Warren
- Canada's Michael Smith Genome Sciences CentreBC Cancer AgencyVancouverBritish ColumbiaCanada
| | - Monica Kotkoff
- Canada's Michael Smith Genome Sciences CentreBC Cancer AgencyVancouverBritish ColumbiaCanada
| | - Fraser Hof
- Department of Chemistry and the Centre for Advanced Materials and Related TechnologyUniversity of VictoriaVictoriaBritish ColumbiaCanada
| | - Linda M. N. Hoang
- Public Health LaboratoryBritish Columbia Centre for Disease ControlVancouverBritish ColumbiaCanada
- Department of Pathology and Laboratory MedicineUniversity of British ColumbiaVancouverBritish ColumbiaCanada
| | - Caren C. Helbing
- Department of Biochemistry and MicrobiologyUniversity of VictoriaVictoriaBritish ColumbiaCanada
| | - Inanc Birol
- Canada's Michael Smith Genome Sciences CentreBC Cancer AgencyVancouverBritish ColumbiaCanada
- Public Health LaboratoryBritish Columbia Centre for Disease ControlVancouverBritish ColumbiaCanada
- Department of Pathology and Laboratory MedicineUniversity of British ColumbiaVancouverBritish ColumbiaCanada
- Department of Medical GeneticsUniversity of British ColumbiaVancouverBritish ColumbiaCanada
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Aijaz MO, Alnaser IA, Farooq I, Siddiqui MIH, Yang SB, Shakeel F, Karim MR. Developing novel multifunctional protective clothes for disabled individuals using bio-based electrospun nanofibrous membranes. Int J Biol Macromol 2024; 275:133598. [PMID: 38960244 DOI: 10.1016/j.ijbiomac.2024.133598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2024] [Revised: 06/12/2024] [Accepted: 06/29/2024] [Indexed: 07/05/2024]
Abstract
A novel kind of protective apparel for handicapped persons has been created with bio-based electrospun nanofibrous (NFs) membranes. Hydrophobic membranes with fine polylactic acid (PLA) NFs had a smooth, bead-less structure with an average diameter of 950 nm. The hydrophilic layer has a similar pattern but a smaller fiber diameter dispersion and an average diameter of 750 nm. The silica nanoparticle-modified super-hydrophobic top layer (contact angle, ~153°) repels water and keeps the user dry. Super-hydrophilic silver nanoparticles in the fabric's bottom layer react with perspiration to kill microorganisms. The fabric's porosity (avg. 1.2-1.5 μm) allows for breathability, while silica nanoparticles boost infrared radiation reflection, keeping users cool on hot days. The dual-layer textile has 4.9 MPa ultimate tensile strength and 68 % elongation compared to the membrane's super-hydrophobic and super-hydrophilic layers. Wearing protective clothes reduced hand temperature by 25 % in direct sunlight and 13 % in a sun simulator with 1 Sun. This fabric will work well for adult diapers, outdoor clothing, and disability accessories. Overall, the protective textiles may improve the quality of life for disabled and elderly people by providing usable textile items adapted to their needs.
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Affiliation(s)
- Muhammad Omer Aijaz
- Center of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research (DSR), College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia; The King Salman Center for Disability Research, Riyadh 12512, Saudi Arabia.
| | - Ibrahim A Alnaser
- Center of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research (DSR), College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia; The King Salman Center for Disability Research, Riyadh 12512, Saudi Arabia; Department of Mechanical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia.
| | - Irfan Farooq
- The King Salman Center for Disability Research, Riyadh 12512, Saudi Arabia; Department of Mechanical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
| | - Md Irfanul Haque Siddiqui
- The King Salman Center for Disability Research, Riyadh 12512, Saudi Arabia; Department of Mechanical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia.
| | - Seong Baek Yang
- The King Salman Center for Disability Research, Riyadh 12512, Saudi Arabia; Research Institute for Green Energy Convergence Technology, Gyeongsang National University, Jinju 52828, Republic of Korea.
| | - Faiyaz Shakeel
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mohammad Rezaul Karim
- Center of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research (DSR), College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia; The King Salman Center for Disability Research, Riyadh 12512, Saudi Arabia.
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Leveraro S, Garstka K, Śliwka P, Janek T, Rowińska-Żyrek M, Remelli M, Bellotti D. Metal coordination governs the antimicrobial efficacy of calcitermin derivatives. Dalton Trans 2024; 53:12676-12687. [PMID: 39012520 DOI: 10.1039/d4dt01514b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
Antimicrobial peptides are promising alternatives to classical antibiotics. Their microbicidal activity can arise from different mechanisms, one of which is known as nutritional immunity and has metal micronutrients and metal-binding biomolecules as its main players. Calcitermin is an antimicrobial peptide and an effective metal chelator. Its properties as an antibacterial and anti-Candida agent have been recently studied both as a free peptide and in the presence of zinc and copper ions, with which it forms stable complexes. Calcitermin derivatives have also gained attention thanks to the possibility of improving their properties, like metal-binding affinity and/or stability in biological fluids, through ad hoc modifications of the native peptide sequence. In this work, the Ala-to-Ser substitutions close to the coordination site of calcitermin have been introduced to study the impact on the biological activity and metal-binding properties. Our results show that metal coordination has a clear impact on the bioactivity of the studied compounds, to the point that the truncated fragment of calcitermin, solely containing the main metal-binding residues, also shows antimicrobial activity.
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Affiliation(s)
- Silvia Leveraro
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy.
| | - Kinga Garstka
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Paulina Śliwka
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, 51-630 Wrocław, Poland
| | - Tomasz Janek
- Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, 51-630 Wrocław, Poland
| | | | - Maurizio Remelli
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy.
| | - Denise Bellotti
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy.
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Dutta U, Goswami MJ, Seema T, Payum T, Ullah TN, Hui PK, Kakati D. Antibacterial, antidiabetic and antioxidant bioevaluation of Calamus leptospadix Griff. and isolation of a flavan type compound. Heliyon 2024; 10:e34638. [PMID: 39130477 PMCID: PMC11315139 DOI: 10.1016/j.heliyon.2024.e34638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 07/12/2024] [Accepted: 07/12/2024] [Indexed: 08/13/2024] Open
Abstract
The plant based natural products have always been a rich source of bioactive molecules for drug discovery. The tender shoots of Calamus leptospadix Griff., an edible medicinal plant was extracted using methanol, water and ethanol as three different solvents to study the effect of the extracting solvents and temperature on their antioxidant, antidiabetic and antibacterial properties and total phenolic and flavonoid contents. The antioxidant properties were determined by the 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS) and ferric reducing antioxidant power (FRAP) assay. The α-glucosidase inhibitory assay was carried out to determine the antidiabetic potential. The antibacterial properties of the extracts were determined against four strains of bacterial species viz. Bacillus subtilis, Streptococcus pneumoniae, Escherichia coli and Citrobacter freundii using Broth macro dilution method. The methanolic extracts of the plant were found to possess the highest total phenolic and total flavonoid contents. In the antioxidant assays, the cold methanolic extract was found to exhibit the highest DDPH radical scavenging activity and ferric-reducing antioxidant power. In the antidiabetic assay, the extract exhibited better α-glucosidase inhibitory potential than that of the positive control acarbose. It was also found to be effective against both gram-positive and gram-negative strains in the antibacterial assay. A flavan-type compound 4-(5,7-dimethoxychroman-2-yl)phenol was isolated from the most bioactive cold methanolic extract of the plant and characterised from its XRD, 1H and 13C NMR, HRMS and IR data.
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Affiliation(s)
- Utpal Dutta
- Department of Chemistry, Rajiv Gandhi University, Rono Hills, Doimukh, Arunachal Pradesh 791112, India
| | - Manab Jyoti Goswami
- Department of Chemistry, Rajiv Gandhi University, Rono Hills, Doimukh, Arunachal Pradesh 791112, India
| | - Tage Seema
- Department of Chemistry, Rajiv Gandhi University, Rono Hills, Doimukh, Arunachal Pradesh 791112, India
| | - Temin Payum
- Department of Botany, Jawaharlal Nehru College, Hill Top, Pasighat, Arunachal Pradesh 791103, India
| | - Tanzim Nishad Ullah
- Department of Biotechnology, National Institute of Technology (NIT)-Arunachal Pradesh, Jote-791113, Arunachal Pradesh, India
| | - Pallabi Kalita Hui
- Department of Biotechnology, National Institute of Technology (NIT)-Arunachal Pradesh, Jote-791113, Arunachal Pradesh, India
| | - Dwipen Kakati
- Department of Chemistry, Rajiv Gandhi University, Rono Hills, Doimukh, Arunachal Pradesh 791112, India
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Abouelkhair AA, Seleem MN. Exploring novel microbial metabolites and drugs for inhibiting Clostridioides difficile. mSphere 2024; 9:e0027324. [PMID: 38940508 PMCID: PMC11288027 DOI: 10.1128/msphere.00273-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Accepted: 06/07/2024] [Indexed: 06/29/2024] Open
Abstract
Clostridioides difficile is an enteric pathogen that can cause a range of illnesses from mild diarrhea to pseudomembranous colitis and even death. This pathogen often takes advantage of microbial dysbiosis provoked by antibiotic use. With the increasing incidence and severity of infections, coupled with high recurrence rates, there is an urgent need to identify innovative therapies that can preserve the healthy state of the gut microbiota. In this study, we screened a microbial metabolite library against C. difficile. From a collection of 527 metabolites, we identified 18 compounds with no previously identified antimicrobial activity and metabolites that exhibited potent activity against C. difficile growth. Of these 18 hits, five drugs and three metabolites displayed the most potent anti-C. difficile activity and were subsequently assessed against 20 clinical isolates of C. difficile. These potent agents included ecteinascidin 770 (minimum inhibitory concentration against 50% of isolates [MIC50] ≤0.06 µg/mL); 8-hydroxyquinoline derivatives, such as broxyquinoline and choloroquinaldol (MIC50 = 0.125 µg/mL); ionomycin calcium salt, carbadox, and robenidine hydrochloride (MIC50 = 1 µg/mL); and dronedarone and milbemycin oxime (MIC50 = 4 µg/mL). Unlike vancomycin and fidaxomicin, which are the standard-of-care anti-C. difficile antibiotics, most of these metabolites showed robust bactericidal activity within 2-8 h with minimal impact on the growth of representative members of the normal gut microbiota. These results suggest that the drugs and microbial metabolite scaffolds may offer alternative avenues to address unmet needs in C. difficile disease prevention and treatment. IMPORTANCE The most frequent infection associated with hospital settings is Clostridioides difficile, which can cause fatal diarrhea and severe colitis, toxic megacolon, sepsis, and leaky gut. Those who have taken antibiotics for other illnesses that affect the gut's healthy microbiota are more susceptible to C. difficile infection (CDI). Recently, some reports showed higher recurrence rates and resistance to anti-C. difficile, which may compromise the efficacy of CDI treatment. Our study is significant because it is anticipated to discover novel microbial metabolites and drugs with microbial origins that are safe for the intestinal flora, effective against C. difficile, and reduce the risk of recurrence associated with CDI.
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Affiliation(s)
- Ahmed A. Abouelkhair
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
- Center for One Health Research, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
- Department of Bacteriology, Mycology, and Immunology, Faculty of Veterinary Medicine, University of Sadat City, Sadat City, Menoufia, Egypt
| | - Mohamed N. Seleem
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
- Center for One Health Research, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
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Ali MAS, Abdel-Moein NM, Owis AS, Ahmed SE, Hanafy EA. Eco-friendly lignin nanoparticles as antioxidant and antimicrobial material for enhanced textile production. Sci Rep 2024; 14:17470. [PMID: 39080332 PMCID: PMC11289415 DOI: 10.1038/s41598-024-67449-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Accepted: 07/11/2024] [Indexed: 08/02/2024] Open
Abstract
Natural polymers are bioactive compounds that are used in the treatment of several disorders. Natural lignin, an amorphous polymer, offers significant potential for use as a building block in the production of bio-renovation materials. This study used an alkaline solvent technique to extract lignin from two Egyptian cotton cultivar byproducts, Giza 86 and 90. We then created nano-lignin to recycle cotton stalks into an environmentally beneficial product. The characterization of L86, L90, LNP86, and LNP90 was carried out using particle size, zeta potential, FT-IR, and TEM. Antioxidant activity using the DPPH assay and antimicrobial activity were determined for lignin and nano-lignin. Seven pathogenic bacteria (Bacillus cereus, Staphylococcus aureus, Staphylococcus sciuri, Salmonella typhi, Salmonella enterica, Escherichia coli, and Pseudomonas aeruginosa) and five mycotoxigenic fungi (Aspergillus flavus, Aspergillus ochraceus, Aspergillus niger, Fusarium proliferatum and Penicillium verrucosum) were used for antimicrobial activity. The results showed high antioxidant efficiency for LNP90, with an IC50 of 10.38 µg/mL. The antimicrobial activity showed positive growth inhibition for all studied microorganisms, with significant differences in nano-lignin compared to ordinary lignin. lignin and nano-lignin were effectively applied to treated textiles for medical purposes. The study concluded that single-use medical textiles with anti-microbial and anti-oxidant properties, made from lignin and nano-lignin, could benefit patients intolerant to antibiotics.
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Affiliation(s)
| | | | - Amal Saber Owis
- Agricultural Research Center, Cotton Research Institute, Giza, Egypt
| | | | - Eman Ahmed Hanafy
- Biochemistry Department, Faculty of Agriculture, Cairo University, Giza, Egypt
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Cui HS, Wu ZR, Shi XY, Dong GQ, Ding SN, Bao N, Yu CM, Wu ZQ. CS/PVP Hydrogel-Based Nanocapillary for Monitoring Bacterial Growth and Rapid Antibiotic Susceptibility Testing. ACS Sens 2024; 9:3540-3548. [PMID: 38908004 DOI: 10.1021/acssensors.4c00381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/24/2024]
Abstract
Infection with drug-resistant bacteria poses a significant threat to human health. Judicious use of antibiotics could reduce the likelihood of bacterial resistance, which can be evaluated through antibiotic susceptibility testing (AST). This paper focuses on the application of a needle-like nanocapillary tip filled with chitosan (CS)/polyethylene pyrrolidone (PVP) hydrogel based on its specific pH-sensitive properties. The gel-filled nanocapillary has the potential to be used for electrical pH detection with a sensitivity of 3.06 nA/pH and a linear range from 7.3 to 4.3. Such sensitivity for pH measurement could be extended for monitoring of bacterial (such as Escherichia coli and Streptococcus salivarius) growth because of the relationship between pH and bacterial growth. Bacterial growth curves obtained using the hydrogel-filled nanocapillary showed good agreement with the OD600 method. Moreover, this device could be applied for rapid AST for tetracycline and norfloxacin on E. coli with minimum inhibitory concentrations of 2 and 0.125 μg/mL, respectively. This study expands the application of the hydrogel-based nanocapillary for bacterial research by monitoring changes in pH values.
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Affiliation(s)
- Hai-Shan Cui
- School of Public Health, Nantong University, Nantong, Jiangsu 226019, China
| | - Zhang-Rong Wu
- School of Public Health, Nantong University, Nantong, Jiangsu 226019, China
| | - Xiao-Yan Shi
- Nantong Stomatological Hospital, Nantong, Jiangsu 226019, China
| | - Gang-Qiang Dong
- Amway (China) Botanical R&D Center, Wuxi, Jiangsu 214115, China
| | - Shou-Nian Ding
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu 211189, China
| | - Ning Bao
- School of Public Health, Nantong University, Nantong, Jiangsu 226019, China
| | - Chun-Mei Yu
- School of Public Health, Nantong University, Nantong, Jiangsu 226019, China
| | - Zeng-Qiang Wu
- School of Public Health, Nantong University, Nantong, Jiangsu 226019, China
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Chen X, Li B. Analysis of Co-localized Biosynthetic Gene Clusters Identifies a Membrane-Permeabilizing Natural Product. JOURNAL OF NATURAL PRODUCTS 2024; 87:1694-1703. [PMID: 38949271 DOI: 10.1021/acs.jnatprod.3c01231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
Combination therapy is an effective strategy to combat antibiotic resistance. Multiple synergistic antimicrobial combinations are produced by enzymes encoded in biosynthetic gene clusters (BGCs) that co-localize on the bacterial genome. This phenomenon led to the hypothesis that mining co-localized BGCs will reveal new synergistic combinations of natural products. Here, we bioinformatically identified 38 pairs of co-localized BGCs, which we predict to produce natural products that are related to known compounds, including polycyclic tetramate macrolactams (PoTeMs). We further showed that ikarugamycin, a PoTeM, increases the membrane permeability of Acinetobacter baumannii and Staphylococcus aureus, which suggests that ikarugamycin might be an adjuvant that facilitates the entry of other natural products. Our work outlines a promising avenue to discover synergistic combinations of natural products by mining bacterial genomes.
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Affiliation(s)
- Xiaoyan Chen
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Bo Li
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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Owen V, Harper N, Dubey V, Gerada A, Boyd SE, Darlow CA. Susceptibility of OXA-48-like-producing Enterobacterales to flomoxef. Clin Microbiol Infect 2024:S1198-743X(24)00346-X. [PMID: 39067511 DOI: 10.1016/j.cmi.2024.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 06/11/2024] [Accepted: 07/18/2024] [Indexed: 07/30/2024]
Affiliation(s)
- Victoria Owen
- Antimicrobial Pharmacodynamics and Therapeutics, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool Health Partners, Liverpool, United Kingdom; Department of Microbiology, Liverpool Clinical Laboratories, Liverpool University National Health Service Foundation Trust, Liverpool, United Kingdom; Blizard Institute, Queen Mary University of London, London, United Kingdom
| | - Nicholas Harper
- Antimicrobial Pharmacodynamics and Therapeutics, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool Health Partners, Liverpool, United Kingdom
| | - Vineet Dubey
- Antimicrobial Pharmacodynamics and Therapeutics, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool Health Partners, Liverpool, United Kingdom
| | - Alessandro Gerada
- Antimicrobial Pharmacodynamics and Therapeutics, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool Health Partners, Liverpool, United Kingdom; Department of Microbiology, Liverpool Clinical Laboratories, Liverpool University National Health Service Foundation Trust, Liverpool, United Kingdom
| | - Sara E Boyd
- Antimicrobial Pharmacodynamics and Therapeutics, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool Health Partners, Liverpool, United Kingdom; Infection Clinical Academic Group, St. George's University Hospital National Health Service Foundation Trust, London, United Kingdom; National Institute for Healthcare Research Health Protection Unit in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College London, London, United Kingdom
| | - Christopher A Darlow
- Antimicrobial Pharmacodynamics and Therapeutics, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool Health Partners, Liverpool, United Kingdom; Department of Microbiology, Liverpool Clinical Laboratories, Liverpool University National Health Service Foundation Trust, Liverpool, United Kingdom.
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Wang N, Sheng Q, Zhu H, Wang J, Qiu J, Cui M, Zhou Y, Deng X, Deng Y, Wang L. Enhancing the effectiveness of Polymyxin E with a Fisetin Nanoemulsion against a Colistin-resistant Salmonella typhimurium infection. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 130:155768. [PMID: 38815408 DOI: 10.1016/j.phymed.2024.155768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 05/13/2024] [Accepted: 05/21/2024] [Indexed: 06/01/2024]
Abstract
BACKGROUND Polymyxin E is widely recognized as a last resort for treating multidrug-resistant gram-negative bacteria. Unfortunately, the effectiveness of polymyxin E is significantly reduced when treating life-threatening bacterial infections due to plasmid-mediated polymyxin E resistance. The synergistic effect of applying a polymyxin E adjuvant is a promising strategy for overcoming the growing threat of antibiotic-resistant pathogens. PURPOSE To evaluate the synergistic effect of fisetin and polymyxin E on S. typhimurium infections in vivo and further elucidate the underlying mechanism of this effect. METHODS The effect of combining fisetin and polymyxin E to treat mobilized colistin resistance-1-positive (MCR-1-positive) gram-negative bacteria in vitro was examined using various methods, such as checkerboard assays, growth curves and time‒kill curves. To elucidate the mechanism by which fisetin affects MCR-1, we employed ultraviolet (UV) absorption spectroscopy, thin layer chromatography (TLC), and western blot analysis to investigate its effect at the protein level. Subsequently, molecular dynamics simulations (MDS) and metabolomics analysis were utilized to determine the site of interaction between fisetin and MCR-1 as well as the potential pathways and mechanisms involved. A new nanoemulsion of fisetin was produced using high-pressure homogenization, and its stability was tested. Finally, two animal models of S. typhimurium HYM2 infection were established to evaluate the synergistic effect of polymyxin E and fisetin in vivo. RESULTS Our study revealed that fisetin exhibited a synergistic effect when combined with polymyxin E against MCR-1-positive S. typhimurium. The TLC results demonstrated that fisetin could inhibit the phosphoethanolamine (PEA) transfer of the MCR-1 protein, thereby restoring the activity of polymyxin E in strains against MCR-1. The MDS analysis indicated robust and immediate binding between fisetin and the MCR-1 protein, with both hydrophobic and polar effects playing significant roles in determining the binding energy of the former. Metabolomic studies demonstrated that the addition of fisetin significantly modulated bacterial metabolites. Moreover, it effectively inhibited the activity of ABC transporters in bacteria, thereby mitigating bacterial drug resistance and enhancing the therapeutic efficacy of polymyxin E. Furthermore, in mouse and chick models of infection, intragastric administration of the fisetin nanoemulsion together with polymyxin E resulted in significant therapeutic benefits, including increased survival rates, reduced bacterial colonization, and decreased levels of inflammatory factors. CONCLUSION Fisetin, an MCR-1 inhibitor and a promising synergistic partner of polymyxin E, has significant potential for clinical application in the treatment of S. typhimurium infections, particularly those resulting extensively from drug-resistant MCR-1-positive strains.
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Affiliation(s)
- Nan Wang
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin, PR China
| | - Qiushuang Sheng
- Jilin Province Product Quality Supervision and Inspection Institute, Changchun 130103, Jinlin, PR China
| | - Haoyu Zhu
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin, PR China
| | - Jianfeng Wang
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin, PR China
| | - Jiazhang Qiu
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin, PR China
| | - Minhe Cui
- Jilin Mushuo Breeding Co., Ltd, Changchun 130052, Jilin, PR China
| | - Yonglin Zhou
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin, PR China
| | - Xuming Deng
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin, PR China
| | - Yanhong Deng
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin, PR China.
| | - Lin Wang
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin, PR China.
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Vasina DV, Antonova NP, Gushchin VA, Aleshkin AV, Fursov MV, Fursova AD, Gancheva PG, Grigoriev IV, Grinkevich P, Kondratev AV, Kostarnoy AV, Lendel AM, Makarov VV, Nikiforova MA, Pochtovyi AA, Prudnikova T, Remizov TA, Shevlyagina NV, Siniavin AE, Smirnova NS, Terechov AA, Tkachuk AP, Usachev EV, Vorobev AM, Yakimakha VS, Yudin SM, Zackharova AA, Zhukhovitsky VG, Logunov DY, Gintsburg AL. Development of novel antimicrobials with engineered endolysin LysECD7-SMAP to combat Gram-negative bacterial infections. J Biomed Sci 2024; 31:75. [PMID: 39044206 PMCID: PMC11267749 DOI: 10.1186/s12929-024-01065-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 07/08/2024] [Indexed: 07/25/2024] Open
Abstract
BACKGROUND Among the non-traditional antibacterial agents in development, only a few targets critical Gram-negative bacteria such as carbapenem-resistant Pseudomonas aeruginosa, Acinetobacter baumannii or cephalosporin-resistant Enterobacteriaceae. Endolysins and their genetically modified versions meet the World Health Organization criteria for innovation, have a novel mode of antibacterial action, no known bacterial cross-resistance, and are being intensively studied for application against Gram-negative pathogens. METHODS The study presents a multidisciplinary approach, including genetic engineering of LysECD7-SMAP and production of recombinant endolysin, its analysis by crystal structure solution following molecular dynamics simulations and evaluation of antibacterial properties. Two types of antimicrobial dosage forms were formulated, resulting in lyophilized powder for injection and hydroxyethylcellulose gel for topical administration. Their efficacy was estimated in the treatment of sepsis, and pneumonia models in BALB/c mice, diabetes-associated wound infection in the leptin receptor-deficient db/db mice and infected burn wounds in rats. RESULTS In this work, we investigate the application strategies of the engineered endolysin LysECD7-SMAP and its dosage forms evaluated in preclinical studies. The catalytic domain of the enzyme shares the conserved structure of endopeptidases containing a putative antimicrobial peptide at the C-terminus of polypeptide chain. The activity of endolysins has been demonstrated against a range of pathogens, such as Klebsiella pneumoniae, A. baumannii, P. aeruginosa, Staphylococcus haemolyticus, Achromobacter spp, Burkholderia cepacia complex and Haemophylus influenzae, including those with multidrug resistance. The efficacy of candidate dosage forms has been confirmed in in vivo studies. Some aspects of the interaction of LysECD7-SMAP with cell wall molecular targets are also discussed. CONCLUSIONS Our studies demonstrate the potential of LysECD7-SMAP therapeutics for the systemic or topical treatment of infectious diseases caused by susceptible Gram-negative bacterial species and are critical to proceed LysECD7-SMAP-based antimicrobials trials to advanced stages.
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Affiliation(s)
- Daria V Vasina
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia.
| | - Nataliia P Antonova
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Vladimir A Gushchin
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Andrey V Aleshkin
- G.N. Gabrichevsky Moscow Research Institute for Epidemiology and Microbiology, Moscow, Russia
| | - Mikhail V Fursov
- State Research Center for Applied Microbiology and Biotechnology, Obolensk, Russia
| | - Anastasiia D Fursova
- State Research Center for Applied Microbiology and Biotechnology, Obolensk, Russia
| | - Petya G Gancheva
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Igor V Grigoriev
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Pavel Grinkevich
- Faculty of Science, University of South Bohemia in Ceske Budejovice, Ceske Budejovice, Czech Republic
| | - Alexey V Kondratev
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Alexey V Kostarnoy
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Anastasiya M Lendel
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Valentine V Makarov
- Centre for Strategic Planning and Management of Biomedical Health Risks of the Federal Medical Biological Agency, Moscow, Russia
| | - Maria A Nikiforova
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Andrei A Pochtovyi
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Tatiana Prudnikova
- Faculty of Science, University of South Bohemia in Ceske Budejovice, Ceske Budejovice, Czech Republic
| | - Timofey A Remizov
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Natalia V Shevlyagina
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Andrei E Siniavin
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Nina S Smirnova
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Alexander A Terechov
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Artem P Tkachuk
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Evgeny V Usachev
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Aleksei M Vorobev
- G.N. Gabrichevsky Moscow Research Institute for Epidemiology and Microbiology, Moscow, Russia
| | - Victoria S Yakimakha
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Sergey M Yudin
- Centre for Strategic Planning and Management of Biomedical Health Risks of the Federal Medical Biological Agency, Moscow, Russia
| | - Anastasia A Zackharova
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Vladimir G Zhukhovitsky
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
- Russian Medical Academy of Continuing Professional Education (RMANPO), Ministry of Public Health, Moscow, Russia
| | - Denis Y Logunov
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Alexander L Gintsburg
- N.F. Gamaleya National Research Centre for Epidemiology and Microbiology, Ministry of Health of the Russian Federation, Moscow, Russia
- Department of Infectiology and Virology, Federal State Autonomous Educational Institution of Higher Education I. M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University), Moscow, Russia
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Rico-Jiménez M, Udaondo Z, Krell T, Matilla MA. Auxin-mediated regulation of susceptibility to toxic metabolites, c-di-GMP levels, and phage infection in the rhizobacterium Serratia plymuthica. mSystems 2024; 9:e0016524. [PMID: 38837409 PMCID: PMC11264596 DOI: 10.1128/msystems.00165-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 04/26/2024] [Indexed: 06/07/2024] Open
Abstract
The communication between plants and their microbiota is highly dynamic and involves a complex network of signal molecules. Among them, the auxin indole-3-acetic acid (IAA) is a critical phytohormone that not only regulates plant growth and development, but is emerging as an important inter- and intra-kingdom signal that modulates many bacterial processes that are important during interaction with their plant hosts. However, the corresponding signaling cascades remain largely unknown. Here, we advance our understanding of the largely unknown mechanisms by which IAA carries out its regulatory functions in plant-associated bacteria. We showed that IAA caused important changes in the global transcriptome of the rhizobacterium Serratia plymuthica and multidisciplinary approaches revealed that IAA sensing interferes with the signaling mediated by other pivotal plant-derived signals such as amino acids and 4-hydroxybenzoic acid. Exposure to IAA caused large alterations in the transcript levels of genes involved in amino acid metabolism, resulting in significant metabolic alterations. IAA treatment also increased resistance to toxic aromatic compounds through the induction of the AaeXAB pump, which also confers resistance to IAA. Furthermore, IAA promoted motility and severely inhibited biofilm formation; phenotypes that were associated with decreased c-di-GMP levels and capsule production. IAA increased capsule gene expression and enhanced bacterial sensitivity to a capsule-dependent phage. Additionally, IAA induced the expression of several genes involved in antibiotic resistance and led to changes in the susceptibility and responses to antibiotics with different mechanisms of action. Collectively, our study illustrates the complexity of IAA-mediated signaling in plant-associated bacteria. IMPORTANCE Signal sensing plays an important role in bacterial adaptation to ecological niches and hosts. This communication appears to be particularly important in plant-associated bacteria since they possess a large number of signal transduction systems that respond to a wide diversity of chemical, physical, and biological stimuli. IAA is emerging as a key inter- and intra-kingdom signal molecule that regulates a variety of bacterial processes. However, despite the extensive knowledge of the IAA-mediated regulatory mechanisms in plants, IAA signaling in bacteria remains largely unknown. Here, we provide insight into the diversity of mechanisms by which IAA regulates primary and secondary metabolism, biofilm formation, motility, antibiotic susceptibility, and phage sensitivity in a biocontrol rhizobacterium. This work has important implications for our understanding of bacterial ecology in plant environments and for the biotechnological and clinical applications of IAA, as well as related molecules.
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Affiliation(s)
- Miriam Rico-Jiménez
- Department of Biotechnology and Environmental Protection, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain
| | - Zulema Udaondo
- Department of Biotechnology and Environmental Protection, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain
- Department of Biomedical Informatics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, Spain
| | - Tino Krell
- Department of Biotechnology and Environmental Protection, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain
| | - Miguel A. Matilla
- Department of Biotechnology and Environmental Protection, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain
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48
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Ma Q, Zhong Y, Huang P, Li A, Jiang T, Jiang L, Yang H, Wang Z, Wu G, Huang X, Pu H, Liu J. Bioactive Naphthoquinone and Phenazine Analogs from the Endophytic Streptomyces sp. PH9030 as α-Glucosidase Inhibitors. Molecules 2024; 29:3450. [PMID: 39124856 PMCID: PMC11313965 DOI: 10.3390/molecules29153450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Revised: 07/19/2024] [Accepted: 07/20/2024] [Indexed: 08/12/2024] Open
Abstract
A talented endophytic Streptomyces sp. PH9030 is derived from the medicinal plant Kadsura coccinea (Lem.) A.C. Smith. The undescribed naphthoquinone naphthgeranine G (5) and seven previously identified compounds, 6-12, were obtained from Streptomyces sp. PH9030. The structure of 5 was identified by comprehensive examination of its HRESIMS, 1D NMR, 2D NMR and ECD data. The inhibitory activities of all the compounds toward α-glucosidase and their antibacterial properties were investigated. The α-glucosidase inhibitory activities of 5, 6, 7 and 9 were reported for the first time, with IC50 values ranging from 66.4 ± 6.7 to 185.9 ± 0.2 μM, as compared with acarbose (IC50 = 671.5 ± 0.2 μM). The molecular docking and molecular dynamics analysis of 5 with α-glucosidase further indicated that it may have a good binding ability with α-glucosidase. Both 9 and 12 exhibited moderate antibacterial activity against methicillin-resistant Staphylococcus aureus, with minimum inhibitory concentration (MIC) values of 16 μg/mL. These results indicate that 5, together with the naphthoquinone scaffold, has the potential to be further developed as a possible inhibitor of α-glucosidase.
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Affiliation(s)
- Qingxian Ma
- China-Pakistan International Science and Technology Innovation Cooperation Base for Ethnic Medicine Development in Hunan Province, Hunan Provincial Key Laboratory for Synthetic Biology of Traditional Chinese Medicine, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China; (Q.M.); (Y.Z.); (P.H.); (A.L.); (H.Y.); (Z.W.); (G.W.)
| | - Yani Zhong
- China-Pakistan International Science and Technology Innovation Cooperation Base for Ethnic Medicine Development in Hunan Province, Hunan Provincial Key Laboratory for Synthetic Biology of Traditional Chinese Medicine, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China; (Q.M.); (Y.Z.); (P.H.); (A.L.); (H.Y.); (Z.W.); (G.W.)
| | - Pingzhi Huang
- China-Pakistan International Science and Technology Innovation Cooperation Base for Ethnic Medicine Development in Hunan Province, Hunan Provincial Key Laboratory for Synthetic Biology of Traditional Chinese Medicine, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China; (Q.M.); (Y.Z.); (P.H.); (A.L.); (H.Y.); (Z.W.); (G.W.)
| | - Aijie Li
- China-Pakistan International Science and Technology Innovation Cooperation Base for Ethnic Medicine Development in Hunan Province, Hunan Provincial Key Laboratory for Synthetic Biology of Traditional Chinese Medicine, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China; (Q.M.); (Y.Z.); (P.H.); (A.L.); (H.Y.); (Z.W.); (G.W.)
| | - Ting Jiang
- Jiangxi Drug Inspection Center, Nanchang 330029, China;
| | - Lin Jiang
- Hunan Engineering Technology Research Center for Bioactive Substance Discovery of Chinese Medicine, School of Pharmacy, Hunan University of Chinese Medicine, Changsha 410208, China;
| | - Hao Yang
- China-Pakistan International Science and Technology Innovation Cooperation Base for Ethnic Medicine Development in Hunan Province, Hunan Provincial Key Laboratory for Synthetic Biology of Traditional Chinese Medicine, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China; (Q.M.); (Y.Z.); (P.H.); (A.L.); (H.Y.); (Z.W.); (G.W.)
| | - Zhong Wang
- China-Pakistan International Science and Technology Innovation Cooperation Base for Ethnic Medicine Development in Hunan Province, Hunan Provincial Key Laboratory for Synthetic Biology of Traditional Chinese Medicine, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China; (Q.M.); (Y.Z.); (P.H.); (A.L.); (H.Y.); (Z.W.); (G.W.)
| | - Guangling Wu
- China-Pakistan International Science and Technology Innovation Cooperation Base for Ethnic Medicine Development in Hunan Province, Hunan Provincial Key Laboratory for Synthetic Biology of Traditional Chinese Medicine, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China; (Q.M.); (Y.Z.); (P.H.); (A.L.); (H.Y.); (Z.W.); (G.W.)
| | - Xueshuang Huang
- China-Pakistan International Science and Technology Innovation Cooperation Base for Ethnic Medicine Development in Hunan Province, Hunan Provincial Key Laboratory for Synthetic Biology of Traditional Chinese Medicine, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China; (Q.M.); (Y.Z.); (P.H.); (A.L.); (H.Y.); (Z.W.); (G.W.)
| | - Hong Pu
- China-Pakistan International Science and Technology Innovation Cooperation Base for Ethnic Medicine Development in Hunan Province, Hunan Provincial Key Laboratory for Synthetic Biology of Traditional Chinese Medicine, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China; (Q.M.); (Y.Z.); (P.H.); (A.L.); (H.Y.); (Z.W.); (G.W.)
| | - Jianxin Liu
- China-Pakistan International Science and Technology Innovation Cooperation Base for Ethnic Medicine Development in Hunan Province, Hunan Provincial Key Laboratory for Synthetic Biology of Traditional Chinese Medicine, School of Pharmaceutical Sciences, Hunan University of Medicine, Huaihua 418000, China; (Q.M.); (Y.Z.); (P.H.); (A.L.); (H.Y.); (Z.W.); (G.W.)
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49
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Ramos-Llorens M, Bello-Madruga R, Valle J, Andreu D, Torrent M. PyAMPA: a high-throughput prediction and optimization tool for antimicrobial peptides. mSystems 2024; 9:e0135823. [PMID: 38934543 PMCID: PMC11264690 DOI: 10.1128/msystems.01358-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Accepted: 05/27/2024] [Indexed: 06/28/2024] Open
Abstract
The alarming rise of antibiotic-resistant bacterial infections is driving efforts to develop alternatives to conventional antibiotics. In this context, antimicrobial peptides (AMPs) have emerged as promising candidates for their ability to target a broad range of microorganisms. However, the development of AMPs with optimal potency, selectivity, and/or stability profiles remains a challenge. To address it, computational tools for predicting AMP properties and designing novel peptides have gained increasing attention. PyAMPA is a novel platform for AMP discovery. It consists of five modules, namely AMPScreen, AMPValidate, AMPSolve, AMPMutate, and AMPOptimize, that allow high-throughput proteome inspection, candidate screening, and optimization through point-mutation and genetic algorithms. The platform also offers additional tools for predicting and evaluating AMP properties, including antimicrobial and cytotoxic activity, and peptide half-life. By providing innovative and accessible inroads into AMP motifs in proteomes, PyAMPA will enable advances in AMP development and potential translation into clinically useful molecules. PyAMPA is available at: https://github.com/SysBioUAB/PyAMPA. IMPORTANCE This paper introduces PyAMPA, a new bioinformatics platform designed for the discovery and optimization of antimicrobial peptides (AMPs). It addresses the urgent need for new antimicrobials due to the rise of antibiotic-resistant infections. PyAMPA, with its five predictive modules -AMPScreen, AMPValidate, AMPSolve, AMPMutate and AMPOptimize, enables high-throughput screening of proteomes to identify potential AMP motifs and optimize them for clinical use. Its unique approach, combining prediction, design, and optimization tools, makes PyAMPA a robust solution for developing new AMP-based therapies, offering a significant advance in combatting antibiotic resistance.
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Affiliation(s)
- Marc Ramos-Llorens
- Systems Biology of Infection Lab, Department of Biochemistry and Molecular Biology, Biosciences Faculty, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Roberto Bello-Madruga
- Systems Biology of Infection Lab, Department of Biochemistry and Molecular Biology, Biosciences Faculty, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Javier Valle
- Barcelona Biomedical Research Park, Department of Medicine and Life Sciences, Universitat Pompeu Fabra, Barcelona, Spain
| | - David Andreu
- Barcelona Biomedical Research Park, Department of Medicine and Life Sciences, Universitat Pompeu Fabra, Barcelona, Spain
| | - Marc Torrent
- Systems Biology of Infection Lab, Department of Biochemistry and Molecular Biology, Biosciences Faculty, Universitat Autònoma de Barcelona, Barcelona, Spain
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50
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Ammanath AV, Matsuo M, Wang H, Kraus F, Bleisch A, Peslalz P, Mohammad M, Deshmukh M, Grießhammer A, Purkayastha M, Vorbach A, Macek B, Brötz-Oesterhelt H, Maier L, Kretschmer D, Peschel A, Jin T, Plietker B, Götz F. Antimicrobial Evaluation of Two Polycyclic Polyprenylated Acylphloroglucinol Compounds: PPAP23 and PPAP53. Int J Mol Sci 2024; 25:8023. [PMID: 39125595 PMCID: PMC11312133 DOI: 10.3390/ijms25158023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2024] [Revised: 07/17/2024] [Accepted: 07/18/2024] [Indexed: 08/12/2024] Open
Abstract
Polycyclic polyprenylated acylphloroglucinols (PPAPs) comprise a large group of compounds of mostly plant origin. The best-known compound is hyperforin from St. John's wort with its antidepressant, antitumor and antimicrobial properties. The chemical synthesis of PPAP variants allows the generation of compounds with improved activity and compatibility. Here, we studied the antimicrobial activity of two synthetic PPAP-derivatives, the water-insoluble PPAP23 and the water-soluble sodium salt PPAP53. In vitro, both compounds exhibited good activity against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus faecium. Both compounds had no adverse effects on Galleria mellonella wax moth larvae. However, they were unable to protect the larvae from infection with S. aureus because components of the larval coelom neutralized the antimicrobial activity; a similar effect was also seen with serum albumin. In silico docking studies with PPAP53 revealed that it binds to the F1 pocket of human serum albumin with a binding energy of -7.5 kcal/mol. In an infection model of septic arthritis, PPAP23 decreased the formation of abscesses and S. aureus load in kidneys; in a mouse skin abscess model, topical treatment with PPAP53 reduced S. aureus counts. Both PPAPs were active against anaerobic Gram-positive gut bacteria such as neurotransmitter-producing Clostridium, Enterococcus or Ruminococcus species. Based on these results, we foresee possible applications in the decolonization of pathogens.
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Affiliation(s)
- Aparna Viswanathan Ammanath
- Microbial Genetics, Interfaculty Institute of Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, 72076 Tübingen, Germany
| | - Miki Matsuo
- Microbial Genetics, Interfaculty Institute of Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, 72076 Tübingen, Germany
| | - Huanhuan Wang
- Microbial Genetics, Interfaculty Institute of Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, 72076 Tübingen, Germany
| | - Frank Kraus
- Organic Chemistry I, Faculty of Chemistry and Food Chemistry, Technical University Dresden, 01062 Dresden, Germany (P.P.)
| | - Anton Bleisch
- Organic Chemistry I, Faculty of Chemistry and Food Chemistry, Technical University Dresden, 01062 Dresden, Germany (P.P.)
| | - Philipp Peslalz
- Organic Chemistry I, Faculty of Chemistry and Food Chemistry, Technical University Dresden, 01062 Dresden, Germany (P.P.)
| | - Majd Mohammad
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden; (M.M.); (M.D.)
| | - Meghshree Deshmukh
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden; (M.M.); (M.D.)
| | - Anne Grießhammer
- Interfakultäres Institut für Mikrobiologie und Infektionsmedizin (IMIT), University of Tübingen, 72076 Tübingen, Germany
- Excellence Cluster 2124 ‘Controlling Microbes to Fight Infections’ (CMFI), University of Tübingen, 72076 Tübingen, Germany
| | - Moushumi Purkayastha
- Microbial Genetics, Interfaculty Institute of Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, 72076 Tübingen, Germany
| | - Andreas Vorbach
- Microbial Bioactive Compounds, Interfaculty Institute of Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, 72076 Tübingen, Germany;
| | - Boris Macek
- Excellence Cluster 2124 ‘Controlling Microbes to Fight Infections’ (CMFI), University of Tübingen, 72076 Tübingen, Germany
- Quantitative Proteomics, Proteome Center Tübingen, Interfaculty Institute for Cell Biology, University of Tübingen, 72076 Tübingen, Germany
| | - Heike Brötz-Oesterhelt
- Excellence Cluster 2124 ‘Controlling Microbes to Fight Infections’ (CMFI), University of Tübingen, 72076 Tübingen, Germany
- Microbial Bioactive Compounds, Interfaculty Institute of Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, 72076 Tübingen, Germany;
| | - Lisa Maier
- Interfakultäres Institut für Mikrobiologie und Infektionsmedizin (IMIT), University of Tübingen, 72076 Tübingen, Germany
- Excellence Cluster 2124 ‘Controlling Microbes to Fight Infections’ (CMFI), University of Tübingen, 72076 Tübingen, Germany
| | - Dorothee Kretschmer
- Interfakultäres Institut für Mikrobiologie und Infektionsmedizin (IMIT), University of Tübingen, 72076 Tübingen, Germany
- Excellence Cluster 2124 ‘Controlling Microbes to Fight Infections’ (CMFI), University of Tübingen, 72076 Tübingen, Germany
| | - Andreas Peschel
- Interfakultäres Institut für Mikrobiologie und Infektionsmedizin (IMIT), University of Tübingen, 72076 Tübingen, Germany
- Excellence Cluster 2124 ‘Controlling Microbes to Fight Infections’ (CMFI), University of Tübingen, 72076 Tübingen, Germany
| | - Tao Jin
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden; (M.M.); (M.D.)
| | - Bernd Plietker
- Organic Chemistry I, Faculty of Chemistry and Food Chemistry, Technical University Dresden, 01062 Dresden, Germany (P.P.)
| | - Friedrich Götz
- Microbial Genetics, Interfaculty Institute of Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, 72076 Tübingen, Germany
- Excellence Cluster 2124 ‘Controlling Microbes to Fight Infections’ (CMFI), University of Tübingen, 72076 Tübingen, Germany
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