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Uc-Cachón AH, Dzul-Beh A, González-Cortázar M, Zamilpa-Álvarez A, Molina-Salinas GM. Investigating the anti-growth, anti-resistance, and anti-virulence activities of Schoepfia schreberi J.F.Gmel. against the superbug Acinetobacter baumannii. Heliyon 2024; 10:e31420. [PMID: 38813144 PMCID: PMC11133943 DOI: 10.1016/j.heliyon.2024.e31420] [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: 01/26/2024] [Revised: 05/14/2024] [Accepted: 05/15/2024] [Indexed: 05/31/2024] Open
Abstract
Schoepfia schreberi has been used in Mayan folk medicine to treat diarrhea and cough. This study aimed to determine the anti-growth, anti-resistance, and/or anti-virulence activities of S. schreberi extracts against Acinetobacter baumannii, a pathogen leader that causes healthcare-associated infections with high rates of drug-resistant including carbapenems, the last line of antibiotics known as superbugs, and analyze their composition using HPLC-DAD. Ethyl acetate (SSB-3) and methanol (SSB-4) bark extracts exhibit antimicrobial and biocidal effects against drug-susceptible and drug-resistant A. baumannii. Chemical analysis revealed that SSB-3 and SSB-4 contained of gallic and ellagic acids derivatives. The anti-resistance activity of the extracts revealed that SSB-3 or SSB-4, combined with imipenem, exhibited potent antibiotic reversal activity against A. baumannii by acting as pump efflux modulators. The extracts also displayed activity against surface motility of A. baumannii and its capacity to survive reactive oxygen species. This study suggests that S. schreberi can be considered a source of antibiotics, even adjuvanted compounds, as anti-resistant or anti-virulence agents against A. baumannii, contributing to ethnopharmacological knowledge and reappraisal of Mayan medicinal flora, and supporting the traditional use of the bark of the medicinal plant S. schreberi for the treatment of infectious diseases.
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Affiliation(s)
- Andrés Humberto Uc-Cachón
- Unidad de Investigación Médica Yucatán, Instituto Mexicano del Seguro Social, Mérida, 97150, Yucatán, Mexico
| | - Angel Dzul-Beh
- Unidad de Investigación Médica Yucatán, Instituto Mexicano del Seguro Social, Mérida, 97150, Yucatán, Mexico
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Ciudad de México, 11340, Mexico
| | - Manases González-Cortázar
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Xochitepec, 62790, Morelos, Mexico
| | - Alejandro Zamilpa-Álvarez
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Xochitepec, 62790, Morelos, Mexico
| | - Gloria María Molina-Salinas
- Unidad de Investigación Médica Yucatán, Instituto Mexicano del Seguro Social, Mérida, 97150, Yucatán, Mexico
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2
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Omran BA, Tseng BS, Baek KH. Nanocomposites against Pseudomonas aeruginosa biofilms: Recent advances, challenges, and future prospects. Microbiol Res 2024; 282:127656. [PMID: 38432017 DOI: 10.1016/j.micres.2024.127656] [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: 10/26/2023] [Revised: 01/10/2024] [Accepted: 02/17/2024] [Indexed: 03/05/2024]
Abstract
Pseudomonas aeruginosa is an opportunistic bacterial pathogen that causes life-threatening and persistent infections in immunocompromised patients. It is the culprit behind a variety of hospital-acquired infections owing to its multiple tolerance mechanisms against antibiotics and disinfectants. Biofilms are sessile microbial aggregates that are formed as a result of the cooperation and competition between microbial cells encased in a self-produced matrix comprised of extracellular polymeric constituents that trigger surface adhesion and microbial aggregation. Bacteria in biofilms exhibit unique features that are quite different from planktonic bacteria, such as high resistance to antibacterial agents and host immunity. Biofilms of P. aeruginosa are difficult to eradicate due to intrinsic, acquired, and adaptive resistance mechanisms. Consequently, innovative approaches to combat biofilms are the focus of the current research. Nanocomposites, composed of two or more different types of nanoparticles, have diverse therapeutic applications owing to their unique physicochemical properties. They are emerging multifunctional nanoformulations that combine the desired features of the different elements to obtain the highest functionality. This review assesses the recent advances of nanocomposites, including metal-, metal oxide-, polymer-, carbon-, hydrogel/cryogel-, and metal organic framework-based nanocomposites for the eradication of P. aeruginosa biofilms. The characteristics and virulence mechanisms of P. aeruginosa biofilms, as well as their devastating impact and economic burden are discussed. Future research addressing the potential use of nanocomposites as innovative anti-biofilm agents is emphasized. Utilization of nanocomposites safely and effectively should be further strengthened to confirm the safety aspects of their application.
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Affiliation(s)
- Basma A Omran
- Department of Biotechnology, Yeungnam University, Gyeongbuk, Gyeongsan 38541, Republic of Korea; Department of Processes Design & Development, Egyptian Petroleum Research Institute (EPRI), PO 11727, Nasr City, Cairo, Egypt
| | - Boo Shan Tseng
- School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV, USA.
| | - Kwang-Hyun Baek
- Department of Biotechnology, Yeungnam University, Gyeongbuk, Gyeongsan 38541, Republic of Korea.
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Chen J, Li Q, Fan L, Xie L, Zhang Q, Deng X. The impact of Lactococcus lactis KUST48 on the transcription profile of Aeromonas hydrophila-infected zebrafish spleen. Microbiol Spectr 2024; 12:e0392723. [PMID: 38441470 PMCID: PMC10986548 DOI: 10.1128/spectrum.03927-23] [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: 11/16/2023] [Accepted: 02/14/2024] [Indexed: 04/06/2024] Open
Abstract
Aeromonas hydrophila, an aquatic pathogenic bacterium, has been found to infect many fish species and cause huge aquaculture losses. Antibiotics are the most common drugs used to treat these infections. However, antibiotic abuse can lead to the development of antibiotic resistance. Probiotics have the potential to replace antibiotics for preventing infections. Zebrafish (Danio rerio) is a model organism used to study the innate immune system and host-pathogen interactions. Currently, there is little information on how the fish immune system responds to A. hydrophila and probiotic treatment. To increase the understanding of the molecular mechanisms behind the zebrafish defense against A. hydrophila and provide evidence that antibiotics can be replaced by probiotics, a transcriptome analysis of the zebrafish spleen was conducted 48 hours after infection by A. hydrophila, as well as after treatment using Lactococcus lactis KUST48 4 hours after infection. A total of 36,499 genes were obtained. There were 3,337 genes found to have significant differential expression between treatment and control groups. According to further annotation and enrichment analysis, differentially expressed genes (DEGs) were involved in signal transduction, endocrine system cancer, and the immune system. Insulin resistance disappeared in the zebrafish after treatment. Quantitative real-time PCR was performed to confirm the significant regulation of immune defense DEGs, the results of which were consistent with the RNA-sequencing data. These results could serve as a basis for future studies on the immune response to A. hydrophila and provide suggestions for probiotic alternatives to antibiotics, which will be of great significance to aquaculture and environmental protection.IMPORTANCEIn recent years, the unreasonable use of antibiotics has led to the emergence of drug-resistant pathogenic bacteria, antibiotic residues, cross infection, toxic side effects, and so on, which has caused a serious threat to human food safety and life health. In recent years, many studies have demonstrated the potential of probiotics as a substitute for antibiotics, but there is still a lack of understanding of the molecular mechanisms underlying probiotic therapy. We conduct a research on the impact of Lactococcus lactis KUST48 on the transcription profile of Aeromonas hydrophila-infected zebrafish spleen. Mortality of zebrafish infected with A. hydrophila was significantly reduced after treatment with L. lactis KUST48. Our results can help to strengthen our understanding of the pathogenic mechanisms of zebrafish and provide a valuable reference for the molecular mechanisms of probiotic therapy.
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Affiliation(s)
- Jiayu Chen
- Department of Modern Agriculture, Zunyi Vocational Technology College, Zunyi, Guizhou, China
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Qiuyue Li
- Department of Modern Agriculture, Zunyi Vocational Technology College, Zunyi, Guizhou, China
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Lili Fan
- Department of Modern Agriculture, Zunyi Vocational Technology College, Zunyi, Guizhou, China
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Liqin Xie
- Department of Modern Agriculture, Zunyi Vocational Technology College, Zunyi, Guizhou, China
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Qilin Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Xianyu Deng
- Department of Modern Agriculture, Zunyi Vocational Technology College, Zunyi, Guizhou, China
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China
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Montalbán-Hernández K, Cogollo-García A, Girón de Velasco-Sada P, Caballero R, Casanovas M, Subiza JL, Conejero L. MV130 in the Prevention of Recurrent Respiratory Tract Infections: A Retrospective Real-World Study in Children and Adults. Vaccines (Basel) 2024; 12:172. [PMID: 38400155 PMCID: PMC10893268 DOI: 10.3390/vaccines12020172] [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: 12/06/2023] [Revised: 01/25/2024] [Accepted: 01/30/2024] [Indexed: 02/25/2024] Open
Abstract
Respiratory tract infections (RTIs) are among the most common and important problems in clinical medicine, making antibiotics the gold standard therapeutic option regardless of their frequent viral etiology. Their excessive and inappropriate use contributes to the rapid rise of antibiotic resistance and underscores the need for alternative strategies, especially when dealing with recurrent RTIs. Prevention is the ideal alternative, but specific vaccines targeting a wide range of respiratory pathogens are scarce. MV130 is a sublingual bacterial vaccine that induces trained immunity and provides non-specific protection against respiratory pathogens in various clinical settings according to the concept of TIbV (Trained Immunity-based Vaccine). A retrospective real-world study (RWS) was conducted to evaluate the annual incidence of RTIs and the consumption of antibiotics before and after the administration of MV130, using data sourced from the medical records of 599 patients (186 children and 413 adults) who suffered from recurrent RTIs. The median number of infectious episodes in children was significantly reduced by more than 70% from 5 episodes (interquartile range (IQR) 4.0-6.0) to 1 (IQR, 0.0-2.0) (p < 0.001) after MV130. Similarly, in adults, the median number of episodes before MV130 immunization was 5 (IQR, 4.0-6.0), which dropped by more than 80% to 1 (IQR, 0.0-1.0) during the year following MV130 immunization (p < 0.001). The median number of antibiotic courses also significantly decreased for both children and adults by over 80% (p < 0.001). This RWS showed that MV130 is an effective strategy for the prevention of respiratory infections and the reduction of associated antibiotic consumption.
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Affiliation(s)
| | | | | | | | | | | | - Laura Conejero
- Inmunotek S.L., 28805 Madrid, Spain; (K.M.-H.); (A.C.-G.); (P.G.d.V.-S.); (R.C.); (M.C.)
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Allemailem KS. Recent Advances in Understanding the Molecular Mechanisms of Multidrug Resistance and Novel Approaches of CRISPR/Cas9-Based Genome-Editing to Combat This Health Emergency. Int J Nanomedicine 2024; 19:1125-1143. [PMID: 38344439 PMCID: PMC10859101 DOI: 10.2147/ijn.s453566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 01/26/2024] [Indexed: 02/15/2024] Open
Abstract
The rapid spread of multidrug resistance (MDR), due to abusive use of antibiotics has led to global health emergency, causing substantial morbidity and mortality. Bacteria attain MDR by different means such as antibiotic modification/degradation, target protection/modification/bypass, and enhanced efflux mechanisms. The classical approaches of counteracting MDR bacteria are expensive and time-consuming, thus, it is highly significant to understand the molecular mechanisms of this resistance to curb the problem from core level. The revolutionary approach of clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated sequence 9 (CRISPR/Cas9), considered as a next-generation genome-editing tool presents an innovative opportunity to precisely target and edit bacterial genome to alter their MDR strategy. Different bacteria possessing antibiotic resistance genes such as mecA, ermB, ramR, tetA, mqrB and blaKPC that have been targeted by CRISPR/Cas9 to re-sensitize these pathogens against antibiotics, such as methicillin, erythromycin, tigecycline, colistin and carbapenem, respectively. The CRISPR/Cas9 from S. pyogenes is the most widely studied genome-editing tool, consisting of a Cas9 DNA endonuclease associated with tracrRNA and crRNA, which can be systematically coupled as sgRNA. The targeting strategies of CRISPR/Cas9 to bacterial cells is mediated through phage, plasmids, vesicles and nanoparticles. However, the targeting approaches of this genome-editing tool to specific bacteria is a challenging task and still remains at a very preliminary stage due to numerous obstacles awaiting to be solved. This review elaborates some recent updates about the molecular mechanisms of antibiotic resistance and the innovative role of CRISPR/Cas9 system in modulating these resistance mechanisms. Furthermore, the delivery approaches of this genome-editing system in bacterial cells are discussed. In addition, some challenges and future prospects are also described.
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Affiliation(s)
- Khaled S Allemailem
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, Buraydah51452, Saudi Arabia
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Shin MK, Hwang IW, Jang BY, Bu KB, Han DH, Lee SH, Oh JW, Yoo JS, Sung JS. The Identification of a Novel Spider Toxin Peptide, Lycotoxin-Pa2a, with Antibacterial and Anti-Inflammatory Activities. Antibiotics (Basel) 2023; 12:1708. [PMID: 38136742 PMCID: PMC10740532 DOI: 10.3390/antibiotics12121708] [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: 11/03/2023] [Revised: 12/05/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023] Open
Abstract
With the increasing challenge of controlling infectious diseases due to the emergence of antibiotic-resistant strains, the importance of discovering new antimicrobial agents is rapidly increasing. Animal venoms contain a variety of functional peptides, making them a promising platform for pharmaceutical development. In this study, a novel toxin peptide with antibacterial and anti-inflammatory activities was discovered from the spider venom gland transcriptome by implementing computational approaches. Lycotoxin-Pa2a (Lytx-Pa2a) showed homology to known-spider toxin, where functional prediction indicated the potential of both antibacterial and anti-inflammatory peptides without hemolytic activity. The colony-forming assay and minimum inhibitory concentration test showed that Lytx-Pa2a exhibited comparable or stronger antibacterial activity against pathogenic strains than melittin. Following mechanistic studies revealed that Lytx-Pa2a disrupts both cytoplasmic and outer membranes of bacteria while simultaneously inducing the accumulation of reactive oxygen species. The peptide exerted no significant toxicity when treated to human primary cells, murine macrophages, and bovine red blood cells. Moreover, Lytx-Pa2a alleviated lipopolysaccharide-induced inflammation in mouse macrophages by suppressing the expression of inflammatory mediators. These findings not only suggested that Lytx-Pa2a with dual activity can be utilized as a new antimicrobial agent for infectious diseases but also demonstrated the implementation of in silico methods for discovering a novel functional peptide, which may enhance the future utilization of biological resources.
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Affiliation(s)
- Min Kyoung Shin
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea; (M.K.S.); (I.-W.H.); (B.-Y.J.); (K.-B.B.); (D.-H.H.); (S.-H.L.); (J.W.O.)
| | - In-Wook Hwang
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea; (M.K.S.); (I.-W.H.); (B.-Y.J.); (K.-B.B.); (D.-H.H.); (S.-H.L.); (J.W.O.)
| | - Bo-Young Jang
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea; (M.K.S.); (I.-W.H.); (B.-Y.J.); (K.-B.B.); (D.-H.H.); (S.-H.L.); (J.W.O.)
| | - Kyung-Bin Bu
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea; (M.K.S.); (I.-W.H.); (B.-Y.J.); (K.-B.B.); (D.-H.H.); (S.-H.L.); (J.W.O.)
| | - Dong-Hee Han
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea; (M.K.S.); (I.-W.H.); (B.-Y.J.); (K.-B.B.); (D.-H.H.); (S.-H.L.); (J.W.O.)
| | - Seung-Ho Lee
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea; (M.K.S.); (I.-W.H.); (B.-Y.J.); (K.-B.B.); (D.-H.H.); (S.-H.L.); (J.W.O.)
| | - Jin Wook Oh
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea; (M.K.S.); (I.-W.H.); (B.-Y.J.); (K.-B.B.); (D.-H.H.); (S.-H.L.); (J.W.O.)
| | - Jung Sun Yoo
- Species Diversity Research Division, National Institute of Biological Resources, Incheon 22689, Republic of Korea;
| | - Jung-Suk Sung
- Department of Life Science, Dongguk University-Seoul, Goyang 10326, Republic of Korea; (M.K.S.); (I.-W.H.); (B.-Y.J.); (K.-B.B.); (D.-H.H.); (S.-H.L.); (J.W.O.)
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Prasad K, Sasi S, Weerasinghe J, Levchenko I, Bazaka K. Enhanced Antimicrobial Activity through Synergistic Effects of Cold Atmospheric Plasma and Plant Secondary Metabolites: Opportunities and Challenges. Molecules 2023; 28:7481. [PMID: 38005203 PMCID: PMC10673009 DOI: 10.3390/molecules28227481] [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: 09/05/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023] Open
Abstract
The emergence of antibiotic resistant microorganisms possesses a great threat to human health and the environment. Considering the exponential increase in the spread of antibiotic resistant microorganisms, it would be prudent to consider the use of alternative antimicrobial agents or therapies. Only a sustainable, sustained, determined, and coordinated international effort will provide the solutions needed for the future. Plant secondary metabolites show bactericidal and bacteriostatic activity similar to that of conventional antibiotics. However, to effectively eliminate infection, secondary metabolites may need to be activated by heat treatment or combined with other therapies. Cold atmospheric plasma therapy is yet another novel approach that has proven antimicrobial effects. In this review, we explore the physiochemical mechanisms that may give rise to the improved antimicrobial activity of secondary metabolites when combined with cold atmospheric plasma therapy.
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Affiliation(s)
- Karthika Prasad
- School of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT 2600, Australia; (S.S.); (J.W.); (I.L.)
| | - Syamlal Sasi
- School of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT 2600, Australia; (S.S.); (J.W.); (I.L.)
| | - Janith Weerasinghe
- School of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT 2600, Australia; (S.S.); (J.W.); (I.L.)
| | - Igor Levchenko
- School of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT 2600, Australia; (S.S.); (J.W.); (I.L.)
- Plasma Sources and Application Centre, NIE, Nanyang Technological University, Singapore 637616, Singapore
| | - Kateryna Bazaka
- School of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT 2600, Australia; (S.S.); (J.W.); (I.L.)
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Westman E, Höglund M, Nilsson FB, Bonnard Å, Englund E, Eriksson PO. Prophylactic antibiotics has no benefit for outcome in clean myringoplasty-A register-based cohort study from SwedEar. Clin Otolaryngol 2023; 48:895-901. [PMID: 37555629 DOI: 10.1111/coa.14089] [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: 12/13/2022] [Revised: 07/10/2023] [Accepted: 07/15/2023] [Indexed: 08/10/2023]
Abstract
OBJECTIVES To investigate if prophylactic antibiotics (PA) in conjunction with myringoplasty of clean and uninfected ears entails a reduction of postoperative infections within 6 weeks after surgery, and whether it affects the healing rate of the tympanic membrane (TM) at follow-up, 6-24 months after surgery. DESIGN A retrospective cohort study of prospectively collected data. SETTING Data extracted from The Swedish Quality Register for Ear Surgery (SwedEar), the years 2013-2019. PARTICIPANTS All patients in SwedEar with a registered clean conventional myringoplasty (tympanoplasty type I) including a follow-up visit. MAIN OUTCOME MEASURES The effect of PA use on TM healing rate at follow-up and postoperative infection within 6 weeks of surgery. RESULTS In the study group (n = 1665) 86.2% had a healed TM at follow-up. There was no significant difference between the groups that had PA administered (87.2%) or not (86.1%). A total of 8.0% had a postoperative infection within 6 weeks. Postoperative infection occurred in 10.2% of the group that received PA (n = 187) compared with 7.7% of the group that did not receive PA. However, this difference was not statistically significant. Postoperative infection within 6 weeks significantly lowered the frequency of healed TMs. CONCLUSION PA administered during clean conventional myringoplasty does not improve the chance of having a healed TM at follow up, nor decrease the risk of having a postoperative infection within 6 weeks after surgery.
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Affiliation(s)
- Eva Westman
- Department of Clinical Sciences, Otorhinolaryngology, Umeå University, Sundsvall, Sweden
| | - Maria Höglund
- Department of Otorhinolaryngology, Surgical Division, County Council of Västernorrland, Sundsvall Hospital, Sundsvall, Sweden
| | - Frida Brännström Nilsson
- Department of Otorhinolaryngology, Surgical Division, County Council of Västernorrland, Sundsvall Hospital, Sundsvall, Sweden
| | - Åsa Bonnard
- Division of CLINTEC, Department of Otorhinolaryngology, Karolinska Institutet, Stockholm, Sweden
- MU ENT, Hearing and Balance, Karolinska University Hospital, Stockholm, Sweden
| | - Erling Englund
- Department of Research and Development, County Council of Västernorrland, Sundsvall Hospital, Sundsvall, Sweden
| | - Per Olof Eriksson
- MU ENT, Hearing and Balance, Karolinska University Hospital, Stockholm, Sweden
- Dept of Surgical Sciences, Otorhinolaryngology, Uppsala University Hospital, Uppsala, Sweden
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Artini M, Papa R, Vrenna G, Trecca M, Paris I, D’Angelo C, Tutino ML, Parrilli E, Selan L. Antarctic Marine Bacteria as a Source of Anti-Biofilm Molecules to Combat ESKAPE Pathogens. Antibiotics (Basel) 2023; 12:1556. [PMID: 37887257 PMCID: PMC10604463 DOI: 10.3390/antibiotics12101556] [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: 09/21/2023] [Revised: 10/17/2023] [Accepted: 10/19/2023] [Indexed: 10/28/2023] Open
Abstract
The ESKAPE pathogens, including bacteria such as Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species, pose a global health threat due to their ability to resist antimicrobial drugs and evade the immune system. These pathogens are responsible for hospital-acquired infections, especially in intensive care units, and contribute to the growing problem of multi-drug resistance. In this study, researchers focused on exploring the potential of Antarctic marine bacteria as a source of anti-biofilm molecules to combat ESKAPE pathogens. Four Antarctic bacterial strains were selected, and their cell-free supernatants were tested against 60 clinical ESKAPE isolates. The results showed that the supernatants did not exhibit antimicrobial activity but effectively prevented biofilm formation and dispersed mature biofilms. This research highlights the promising potential of Antarctic bacteria in producing compounds that can counteract biofilms formed by clinically significant bacterial species. These findings contribute to the development of new strategies for preventing and controlling infections caused by ESKAPE pathogens.
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Affiliation(s)
- Marco Artini
- Department of Public Health and Infectious Diseases, Sapienza University, p.le Aldo Moro 5, 00185 Rome, Italy; (M.A.); (G.V.); (M.T.); (I.P.); (L.S.)
| | - Rosanna Papa
- Department of Public Health and Infectious Diseases, Sapienza University, p.le Aldo Moro 5, 00185 Rome, Italy; (M.A.); (G.V.); (M.T.); (I.P.); (L.S.)
| | - Gianluca Vrenna
- Department of Public Health and Infectious Diseases, Sapienza University, p.le Aldo Moro 5, 00185 Rome, Italy; (M.A.); (G.V.); (M.T.); (I.P.); (L.S.)
- Research Unit of Diagnostical and Management Innovations, Children’s Hospital and Institute Research Bambino Gesù, 00165 Rome, Italy
| | - Marika Trecca
- Department of Public Health and Infectious Diseases, Sapienza University, p.le Aldo Moro 5, 00185 Rome, Italy; (M.A.); (G.V.); (M.T.); (I.P.); (L.S.)
| | - Irene Paris
- Department of Public Health and Infectious Diseases, Sapienza University, p.le Aldo Moro 5, 00185 Rome, Italy; (M.A.); (G.V.); (M.T.); (I.P.); (L.S.)
| | - Caterina D’Angelo
- Department of Chemical Sciences, Federico II University, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Naples, Italy; (C.D.); (M.L.T.); (E.P.)
| | - Maria Luisa Tutino
- Department of Chemical Sciences, Federico II University, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Naples, Italy; (C.D.); (M.L.T.); (E.P.)
| | - Ermenegilda Parrilli
- Department of Chemical Sciences, Federico II University, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Naples, Italy; (C.D.); (M.L.T.); (E.P.)
| | - Laura Selan
- Department of Public Health and Infectious Diseases, Sapienza University, p.le Aldo Moro 5, 00185 Rome, Italy; (M.A.); (G.V.); (M.T.); (I.P.); (L.S.)
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10
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Pacios O, Blasco L, Ortiz Cartagena C, Bleriot I, Fernández-García L, López M, Barrio-Pujante A, Cuenca FF, Aracil B, Oteo-Iglesias J, Tomás M. Molecular studies of phages- Klebsiella pneumoniae in mucoid environment: innovative use of mucolytic agents prior to the administration of lytic phages. Front Microbiol 2023; 14:1286046. [PMID: 37886069 PMCID: PMC10598653 DOI: 10.3389/fmicb.2023.1286046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 09/26/2023] [Indexed: 10/28/2023] Open
Abstract
Mucins are important glycoproteins that form a protective layer throughout the gastrointestinal and respiratory tracts. There is scientific evidence of increase in phage-resistance in the presence of mucin for some bacterial pathogens. Manipulation in mucin composition may ultimately influence the effectiveness of phage therapy. In this work, two clinical strains of K. pneumoniae (K3574 and K3325), were exposed to the lytic bacteriophage vB_KpnS-VAC35 in the presence and absence of mucin on a long-term co-evolution assay, in an attempt to mimic in vitro the exposure to mucins that bacteria and their phages face in vivo. Enumerations of the bacterial and phage counts at regular time intervals were conducted, and extraction of the genomic DNA of co-evolved bacteria to the phage, the mucin and both was performed. We determined the frequency of phage-resistant mutants in the presence and absence of mucin and including a mucolytic agent (N-acetyl L-cysteine, NAC), and sequenced them using Nanopore. We phenotypically demonstrated that the presence of mucin induces the emergence of bacterial resistance against lytic phages, effectively decreased in the presence of NAC. In addition, the genomic analysis revealed some of the genes relevant to the development of phage resistance in long-term co-evolution, with a special focus on the mucoid environment. Genes involved in the metabolism of carbohydrates were mutated in the presence of mucin. In conclusion, the use of mucolytic agents prior to the administration of lytic phages could be an interesting therapeutic option when addressing K. pneumoniae infections in environments where mucin is overproduced.
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Affiliation(s)
- Olga Pacios
- Grupo de Microbiología Traslacional y Multidisciplinar (MicroTM)-Servicio de Microbiología Instituto de Investigación Biomédica A Coruña (INIBIC), Hospital A Coruña (CHUAC), Universidad de A Coruña (UDC), A Coruña, Spain
- Grupo de Estudio de los Mecanismos de Resistencia Antimicrobiana (GEMARA) formando parte de la Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica (SEIMC), Madrid, Spain
| | - Lucía Blasco
- Grupo de Microbiología Traslacional y Multidisciplinar (MicroTM)-Servicio de Microbiología Instituto de Investigación Biomédica A Coruña (INIBIC), Hospital A Coruña (CHUAC), Universidad de A Coruña (UDC), A Coruña, Spain
- Grupo de Estudio de los Mecanismos de Resistencia Antimicrobiana (GEMARA) formando parte de la Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica (SEIMC), Madrid, Spain
| | - Concha Ortiz Cartagena
- Grupo de Microbiología Traslacional y Multidisciplinar (MicroTM)-Servicio de Microbiología Instituto de Investigación Biomédica A Coruña (INIBIC), Hospital A Coruña (CHUAC), Universidad de A Coruña (UDC), A Coruña, Spain
- Grupo de Estudio de los Mecanismos de Resistencia Antimicrobiana (GEMARA) formando parte de la Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica (SEIMC), Madrid, Spain
| | - Inés Bleriot
- Grupo de Microbiología Traslacional y Multidisciplinar (MicroTM)-Servicio de Microbiología Instituto de Investigación Biomédica A Coruña (INIBIC), Hospital A Coruña (CHUAC), Universidad de A Coruña (UDC), A Coruña, Spain
- Grupo de Estudio de los Mecanismos de Resistencia Antimicrobiana (GEMARA) formando parte de la Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica (SEIMC), Madrid, Spain
| | - Laura Fernández-García
- Grupo de Microbiología Traslacional y Multidisciplinar (MicroTM)-Servicio de Microbiología Instituto de Investigación Biomédica A Coruña (INIBIC), Hospital A Coruña (CHUAC), Universidad de A Coruña (UDC), A Coruña, Spain
- Grupo de Estudio de los Mecanismos de Resistencia Antimicrobiana (GEMARA) formando parte de la Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica (SEIMC), Madrid, Spain
| | - María López
- Grupo de Microbiología Traslacional y Multidisciplinar (MicroTM)-Servicio de Microbiología Instituto de Investigación Biomédica A Coruña (INIBIC), Hospital A Coruña (CHUAC), Universidad de A Coruña (UDC), A Coruña, Spain
- Grupo de Estudio de los Mecanismos de Resistencia Antimicrobiana (GEMARA) formando parte de la Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica (SEIMC), Madrid, Spain
| | - Antonio Barrio-Pujante
- Grupo de Microbiología Traslacional y Multidisciplinar (MicroTM)-Servicio de Microbiología Instituto de Investigación Biomédica A Coruña (INIBIC), Hospital A Coruña (CHUAC), Universidad de A Coruña (UDC), A Coruña, Spain
- Grupo de Estudio de los Mecanismos de Resistencia Antimicrobiana (GEMARA) formando parte de la Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica (SEIMC), Madrid, Spain
| | - Felipe Fernández Cuenca
- Grupo de Estudio de los Mecanismos de Resistencia Antimicrobiana (GEMARA) formando parte de la Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica (SEIMC), Madrid, Spain
- Unidad Clínica de Enfermedades Infecciosas y Microbiología Clínica, Hospital Universitario Virgen Macarena, Instituto de Biomedicina de Sevilla (Hospital Universitario Virgen Macarena/CSIC/Universidad de Sevilla), Sevilla, Spain
- MePRAM, Proyecto de Medicina de Precisión contra las resistencias Antimicrobianas, Madrid, Spain
| | - Belén Aracil
- MePRAM, Proyecto de Medicina de Precisión contra las resistencias Antimicrobianas, Madrid, Spain
- Laboratorio de Referencia e Investigación de Resistencias a Antibióticos e Infecciones Sanitarias, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Madrid, Spain
- CIBER de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Jesús Oteo-Iglesias
- Grupo de Estudio de los Mecanismos de Resistencia Antimicrobiana (GEMARA) formando parte de la Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica (SEIMC), Madrid, Spain
- MePRAM, Proyecto de Medicina de Precisión contra las resistencias Antimicrobianas, Madrid, Spain
- Laboratorio de Referencia e Investigación de Resistencias a Antibióticos e Infecciones Sanitarias, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Madrid, Spain
- CIBER de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
| | - María Tomás
- Grupo de Microbiología Traslacional y Multidisciplinar (MicroTM)-Servicio de Microbiología Instituto de Investigación Biomédica A Coruña (INIBIC), Hospital A Coruña (CHUAC), Universidad de A Coruña (UDC), A Coruña, Spain
- Grupo de Estudio de los Mecanismos de Resistencia Antimicrobiana (GEMARA) formando parte de la Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica (SEIMC), Madrid, Spain
- MePRAM, Proyecto de Medicina de Precisión contra las resistencias Antimicrobianas, Madrid, Spain
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11
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Ng WZJ, van Hasselt J, Aggarwal B, Manoharan A. Association Between Adult Antibiotic Use, Microbial Dysbiosis and Atopic Conditions - A Systematic Review. J Asthma Allergy 2023; 16:1115-1132. [PMID: 37822520 PMCID: PMC10564082 DOI: 10.2147/jaa.s401755] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 09/07/2023] [Indexed: 10/13/2023] Open
Abstract
Background Strong associations between early antibiotic exposure and increased risk of childhood allergies have been established. Antibiotics have the potential to induce microbial dysbiosis that may be linked to allergic conditions. This review examines the limited available evidence on the associations between adult antibiotic use, microbial dysbiosis and atopic conditions. Methods A systematic literature search was conducted using PubMed and Embase for relevant studies, published between 01-01-2000 and 08-17-2022. We searched for associations between antibiotic use, microbial dysbiosis, and allergic conditions in adults, defined as over 13 years of age for the purposes of this review. Results Twenty-one studies were analyzed, with the inclusion of four narrative reviews as scarce relevant literature was found when stricter selection criteria were employed. Relevant studies predominantly focused on asthma. Significant microbial differences were observed in most measures between healthy subjects and subjects with allergic conditions. However, no system-wise and strain-wise associations were evident. Notably, at the phyla level, the Bacillota and Pseudomonadota phyla were associated with asthmatics, while the Actinobacteria phylum was linked to healthy controls. Asthmatics tends to reflect upregulation in the Bacillota and Pseudomonadota phyla in both airway and gut microbiomes. Conclusion No compelling evidence could be found between adult antibiotic exposure, consequent microbial dysbiosis, and allergic conditions in adults. Our review is limited by scarce literature and therefore remains inconclusive. However, potential implications of antibiotic use impacting on allergic conditions justify additional research and heightened pharmacovigilance in this area.
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Affiliation(s)
- Wan Zhen Janice Ng
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | | | - Bhumika Aggarwal
- Regional Respiratory Medical Affairs, GSK Plc, Singapore, Singapore
| | - Anand Manoharan
- Infectious Diseases Medical & Scientific Affairs, GSK, Mumbai, India
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12
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Tai Y, Tian M, Chen Y, You P, Song X, Xu B, Duan C, Jin D. Preparation of PLGA microspheres loaded with niclosamide via microfluidic technology and their inhibition of Caco-2 cell activity in vitro. Front Chem 2023; 11:1249293. [PMID: 37780982 PMCID: PMC10537947 DOI: 10.3389/fchem.2023.1249293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 09/04/2023] [Indexed: 10/03/2023] Open
Abstract
Niclosamide (NIC) is a multifunctional drug that regulates various signaling pathways and biological processes. It is widely used for the treatment of cancer, viral infections, and metabolic disorders. However, its low water solubility limits its efficacy. In this study, poly(lactic-co-glycolic acid) (PLGA) and hyaluronic acid (HA), which exhibit good biocompatibility, biodegradability, and non-immunogenicity, were conjugated with niclosamide to prepare PLGA-HA-niclosamide polymeric nanoparticles (NIC@PLGA-HA) using microfluidic technology. The obtained microspheres had a uniform size distribution, with an average mean size of 442.0 ± 18.8 nm and zeta potential of -25.4 ± 0.41 mV, indicating their stable dispersion in water. The drug-loading efficiency was 8.70%. The drug-loaded microspheres showed sustained release behavior at pH 7.4 and 5.0, but not at pH 2.0, and the drug release kinetics were described by a quasi-first-order kinetic equation. The effect of the drug-loaded microspheres on the proliferation of Caco-2 cells was detected using the MTT assay. Hydrophilic HA-modified NIC@PLGA-HA microspheres prepared via microfluidic technology increased the cellular uptake by Caco-2 cells. Compared to the same concentration of NIC, the NIC@PLGA-HA microspheres demonstrated a stronger inhibitory effect on Caco-2 cells owing to the combined effect of PLGA, HA, and NIC. Therefore, the pH-responsive NIC@PLGA-HA microspheres synthesized using microfluid technology increased the solubility of NIC and improved its biological activity, thus contributing to the demand for intestinal drug carriers.
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Affiliation(s)
- Yulei Tai
- School Laboratory of Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, China
- Laboratory of Biomarkers and In Vitro Diagnosis Translation of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Menglun Tian
- School Laboratory of Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, China
- Laboratory of Biomarkers and In Vitro Diagnosis Translation of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yu Chen
- School Laboratory of Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, China
- Laboratory of Biomarkers and In Vitro Diagnosis Translation of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Peijun You
- School Laboratory of Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, China
- Laboratory of Biomarkers and In Vitro Diagnosis Translation of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Xiaojun Song
- School Laboratory of Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, China
- Laboratory of Biomarkers and In Vitro Diagnosis Translation of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Bangting Xu
- School Laboratory of Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Cidong Duan
- School Laboratory of Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, China
- Laboratory of Biomarkers and In Vitro Diagnosis Translation of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Dazhi Jin
- School Laboratory of Medicine, Hangzhou Medical College, Hangzhou, Zhejiang, China
- Laboratory of Biomarkers and In Vitro Diagnosis Translation of Zhejiang Province, Hangzhou, Zhejiang, China
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13
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Wan Y, Wai Chi Chan E, Chen S. Maintenance and generation of proton motive force are both essential for expression of phenotypic antibiotic tolerance in bacteria. Microbiol Spectr 2023; 11:e0083223. [PMID: 37623371 PMCID: PMC10580908 DOI: 10.1128/spectrum.00832-23] [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: 02/25/2023] [Accepted: 07/11/2023] [Indexed: 08/26/2023] Open
Abstract
Bacterial antibiotic tolerance, a phenomenon first observed in 1944, is known to be responsible for both onset and exacerbation of recurrent and chronic bacterial infections. The development of antibiotic tolerance was previously thought to be due to a switch to physiological dormancy when bacteria encounter adverse growth conditions. Our recent laboratory findings, however, showed that a set of genes related to the maintenance of proton motive force (PMF) are up-regulated under starvation, indicating that the tolerant sub-population, which are commonly known as persisters, can actively maintain their tolerance phenotypes. In this study, we investigated the relative functional roles of proteins involved in the maintenance and active generation of PMF in mediating tolerance formation in bacteria and found that the PspA and RcsB proteins play a key role in PMF maintenance in persisters, as deletion of genes encoding these two proteins resulted in significantly lower tolerance levels. Consistently, expression of the OsmC and Bdm proteins, which is under regulation by RcsB, is required to maintain PMF and the antibiotic tolerance phenotypes. On the other hand, the NuoL, Ndh, AppC, CyoB, and NuoF proteins, which are electron transport chain (ETC) components, were also found to be actively expressed in persisters in order to generate PMF to support functioning of various tolerance mechanisms such as efflux activities. Our data show that active generation of PMF is even more important than the PMF maintenance functions of PspA and RcsB in the expression of antibiotic tolerance phenotypes in persisters. Assessment of double- and triple-gene knockout strains, in which the PMF maintenance genes and those encoding ETC components were simultaneously deleted, confirms that these two groups of genes are both required for the expression of antibiotic tolerance phenotypes and that a lack of these functions would result in complete PMF dissipation and accumulation of antibiotics in the intracellular compartment of persisters and eventually cell death. Products of these genes are, therefore, ideal targets for future development of anti-tolerance agents. IMPORTANCE In this work, bacteria were found to undergo active generation and maintenance of proton motive force (PMF) under adverse conditions, such as starvation so as to support a range of physiological functions in order to survive under such conditions for a prolonged period. The ability to maintain a substantial level of PMF was found to be directly linked to that exhibiting phenotypic antibiotic tolerance under nutrient starvation or other adverse conditions. These findings infer that bacteria do not simply become physiologically dormant when they become antibiotic tolerant, instead they need to produce a wide range of proteins including those which help prevent PMF dissipation, such as PspA and RcsB, and the electron transport chain components, such as NuoL and Ndh, that actively generate PMF even during long-term starvation. As antibiotic tolerant sub-population is known to play a role in eliciting recurrent and chronic infections, especially among patients with a weakened immune system, the PMF maintenance mechanisms identified in this work are potential targets for the development of new strategies to control recurrent and chronic infections.
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Affiliation(s)
- Yingkun Wan
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
| | - Edward Wai Chi Chan
- Department of Applied Biology and Chemical Technology, State Key Lab of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Sheng Chen
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
- Department of Applied Biology and Chemical Technology, State Key Lab of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
- City University of Hong Kong Chendu Research Institute, Chengdu, China
- Shenzhen Key Lab for Food Biological Safety Control, Hong Kong PolyU Shenzhen Research Institute, Shenzhen, China
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14
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Bello-Madruga R, Valle J, Jiménez MÁ, Torrent M, Montero-Alejo V, Andreu D. The C-Terminus of Panusin, a Lobster β-Defensin, Is Crucial for Optimal Antimicrobial Activity and Serum Stability. Pharmaceutics 2023; 15:1777. [PMID: 37376223 DOI: 10.3390/pharmaceutics15061777] [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: 05/24/2023] [Revised: 06/15/2023] [Accepted: 06/16/2023] [Indexed: 06/29/2023] Open
Abstract
β-defensins are one of the most abundant and studied families of antimicrobial peptides (AMPs). Because of their selective toxicity to bacterial membranes and a broad spectrum of microbicidal action, β-defensins are regarded as potential therapeutic agents. This work focuses on a β-defensin-like AMP from the spiny lobster Panulirus argus (hereafter referred to as panusin or PaD). This AMP is structurally related to mammalian defensins via the presence of an αβ domain stabilized by disulfide bonds. Previous studies of PaD suggest that its C-terminus (Ct_PaD) contains the main structural determinants of antibacterial activity. To confirm this hypothesis, we made synthetic versions of PaD and Ct_PaD to determine the influence of the C-terminus on antimicrobial activity, cytotoxicity, proteolytic stability, and 3D structure. After successful solid-phase synthesis and folding, antibacterial assays of both peptides showed truncated Ct_PaD to be more active than native PaD, confirming the role of the C-terminus in activity and suggesting that cationic residues in that region enhance binding to negatively charged membranes. On the other hand, neither PaD nor Ct_PaD were hemolytic or cytotoxic in human cells. Proteolysis in human serum was also studied, showing high (>24 h) t1/2 values for PaD and lower but still considerable for Ct_PaD, indicating that the missing native disulfide bond in Ct_PaD alters protease resistance, albeit not decisively. NMR-2D experiments in water agree with the results obtained by circular dichroism (CD), where in SDS micelles, CD showed both peptides adopting an increasingly ordered structure in a hydrophobic environment, in tune with their ability to perturb bacterial membrane systems. In conclusion, while the β-defensin features of PaD are confirmed as advantageous in terms of antimicrobial activity, toxicity, and protease stability, the results of the present work suggest that these same features are preserved, even enhanced, in the structurally simpler Ct_PaD, which must therefore be viewed as a valuable lead for the development of novel anti-infectives.
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Affiliation(s)
- Roberto Bello-Madruga
- Barcelona Biomedical Research Park, Department of Medicine and Life Sciences, Universitat Pompeu Fabra, 08003 Barcelona, Spain
- Systems Biology of Infection Lab, Department of Biochemistry and Molecular Biology, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
- Department of Biochemistry and Molecular Biology, Center for Pharmaceutical Research and Development, (CIDEM), La Habana 10400, Cuba
| | - Javier Valle
- Barcelona Biomedical Research Park, Department of Medicine and Life Sciences, Universitat Pompeu Fabra, 08003 Barcelona, Spain
| | - M Ángeles Jiménez
- Instituto de Química Física Blas Cabrera-CSIC, Serrano 119, 28006 Madrid, Spain
| | - Marc Torrent
- Systems Biology of Infection Lab, Department of Biochemistry and Molecular Biology, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Vivian Montero-Alejo
- Department of Biochemistry and Molecular Biology, Center for Pharmaceutical Research and Development, (CIDEM), La Habana 10400, Cuba
| | - David Andreu
- Barcelona Biomedical Research Park, Department of Medicine and Life Sciences, Universitat Pompeu Fabra, 08003 Barcelona, Spain
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15
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Geyer J, Krupa KA, Harris ZM, Sun Y, Sharma L, Würstle S, Hu B, Stanley G, Rajagopalan G, Pellot E, Koff JL, Robinson JB. A Novel Zinc (II) Porphyrin Is Synergistic with PEV2 Bacteriophage against Pseudomonas aeruginosa Infections. Antibiotics (Basel) 2023; 12:735. [PMID: 37107097 PMCID: PMC10135120 DOI: 10.3390/antibiotics12040735] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/05/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
Pseudomonas aeruginosa (PsA) is an opportunistic bacterial pathogen that causes life-threatening infections in individuals with compromised immune systems and exacerbates health concerns for those with cystic fibrosis (CF). PsA rapidly develops antibiotic resistance; thus, novel therapeutics are urgently needed to effectively combat this pathogen. Previously, we have shown that a novel cationic Zinc (II) porphyrin (ZnPor) has potent bactericidal activity against planktonic and biofilm-associated PsA cells, and disassembles the biofilm matrix via interactions with eDNA In the present study, we report that ZnPor caused a significant decrease in PsA populations in mouse lungs within an in vivo model of PsA pulmonary infection. Additionally, when combined with an obligately lytic phage PEV2, ZnPor at its minimum inhibitory concentration (MIC) displayed synergy against PsA in an established in vitro lung model resulting in greater protection of H441 lung cells versus either treatment alone. Concentrations above the minimum bactericidal concentration (MBC) of ZnPor were not toxic to H441 cells; however, no synergy was observed. This dose-dependent response is likely due to ZnPor's antiviral activity, reported herein. Together, these findings show the utility of ZnPor alone, and its synergy with PEV2, which could be a tunable combination used in the treatment of antibiotic-resistant infections.
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Affiliation(s)
- Jessica Geyer
- Department of Biology, University of Dayton, Dayton, OH 45469, USA
| | - Kristen A. Krupa
- Department of Chemical and Materials Engineering, University of Dayton, Dayton, OH 45469, USA
- Integrated Science and Engineering Center, University of Dayton, Dayton, OH 45469, USA
| | - Zachary M. Harris
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Ying Sun
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Lokesh Sharma
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Silvia Würstle
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
- School of Medicine, Technical University of Munich, 81675 Munich, Germany
| | - Buqu Hu
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Gail Stanley
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Govindarajan Rajagopalan
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Erin Pellot
- Department of Biology, University of Dayton, Dayton, OH 45469, USA
| | - Jonathan L. Koff
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Jayne B. Robinson
- Department of Biology, University of Dayton, Dayton, OH 45469, USA
- Integrated Science and Engineering Center, University of Dayton, Dayton, OH 45469, USA
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Goyal A, Kharkwal H, Piplani M, Singh Y, Murugesan S, Aggarwal A, Kumar P, Chander S. Spotlight on 4-substituted quinolines as potential anti-infective agents: Journey beyond chloroquine. Arch Pharm (Weinheim) 2023; 356:e2200361. [PMID: 36494101 DOI: 10.1002/ardp.202200361] [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: 07/17/2022] [Revised: 11/10/2022] [Accepted: 11/14/2022] [Indexed: 12/14/2022]
Abstract
Continued emerging resistance of pathogens against the clinically approved candidates and their associated limitations continuously demand newer agents having better potency with a more suited safety profile. Quinoline nuclei containing scaffolds of natural and synthetic origin have been documented for diverse types of pharmacological activities, and a number of drugs are clinically approved. In the present review, we unprecedentedly covered the biological potential of 4-substituted quinoline and elaborated a rationale for its special privilege to afford the significant number of approved clinical drugs, particularly against infectious pathogens. Compounds with 4-substituted quinoline are well documented for antimalarial activity, but in the last two decades, they have been extensively explored for activity against cancer, tuberculosis, and several other pathogens including viruses, bacteria, fungi, and other infectious pathogens. In the present study, the anti-infective spectrum of this scaffold is discussed against viruses, mycobacteria, malarial parasites, and fungal and bacterial strains, along with recent updates in this area, with special emphasis on the structure-activity relationship.
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Affiliation(s)
- Ankush Goyal
- School of Pharmacy, Maharaja Agrasen University, Solan, Himachal Pradesh, India
| | - Harsha Kharkwal
- Amity Institute of Phytochemistry & Phytomedicine, Amity University Uttar Pradesh, Noida, Uttar Pradesh, India
| | - Mona Piplani
- School of Pharmacy, Maharaja Agrasen University, Solan, Himachal Pradesh, India
| | - Yogendra Singh
- School of Pharmacy, Maharaja Agrasen University, Solan, Himachal Pradesh, India
| | | | - Amit Aggarwal
- School of Pharmacy, Maharaja Agrasen University, Solan, Himachal Pradesh, India
| | - Piyush Kumar
- Department of Chemistry, Indian Institute of Technology, Jammu, Jammu and Kashmir, India
| | - Subhash Chander
- Amity Institute of Phytochemistry & Phytomedicine, Amity University Uttar Pradesh, Noida, Uttar Pradesh, India
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Algammal A, Hetta HF, Mabrok M, Behzadi P. Editorial: Emerging multidrug-resistant bacterial pathogens "superbugs": A rising public health threat. Front Microbiol 2023; 14:1135614. [PMID: 36819057 PMCID: PMC9930894 DOI: 10.3389/fmicb.2023.1135614] [Citation(s) in RCA: 50] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Accepted: 01/20/2023] [Indexed: 02/04/2023] Open
Affiliation(s)
- Abdelazeem Algammal
- Department of Bacteriology, Immunology, and Mycology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt,*Correspondence: Abdelazeem Algammal ✉
| | - Helal F. Hetta
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Mahmoud Mabrok
- Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
| | - Payam Behzadi
- Department of Microbiology, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran,Payam Behzadi ✉
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Barqi MM, Abdellah IM, Eletmany MR, Ali NM, Elhenawy AA, Abd El Latif FM. Synthesis, Characterization, Bioactivity Screening and Computational Studies of Diphenyl−malonohydrazides and Pyridines Derivatives. ChemistrySelect 2023. [DOI: 10.1002/slct.202203913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Mashael M. Barqi
- Chemistry Department, Faculty of Science Albaha University Albaha 65731 Saudi Arabia
| | - Islam M. Abdellah
- Chemistry Department, Faculty of Science Aswan University Aswan 81528 Egypt
| | - Mohamed R. Eletmany
- Chemistry Department, Faculty of Science South Valley University Qena 83523 Egypt
- TECS Department, Wilson College of Textiles NC State University Raleigh 27606 USA
| | - Nada M. Ali
- Chemistry Department, Faculty of Science Albaha University Albaha 65731 Saudi Arabia
| | - Ahmed A. Elhenawy
- Chemistry Department, Faculty of Science Albaha University Albaha 65731 Saudi Arabia
- Chemistry Department, Faculty of Science Al-Azar University Cairo 11884 Egypt
| | - Fawy M. Abd El Latif
- Chemistry Department, Faculty of Science Albaha University Albaha 65731 Saudi Arabia
- Chemistry Department, Faculty of Science Aswan University Aswan 81528 Egypt
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Stoitsova S, Paunova-Krasteva T, Dimitrova PD, Damyanova T. The concept for the antivirulence therapeutics approach as alternative to antibiotics: hope or still a fiction? BIOTECHNOL BIOTEC EQ 2022. [DOI: 10.1080/13102818.2022.2106887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Affiliation(s)
- Stoyanka Stoitsova
- Department of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Tsvetelina Paunova-Krasteva
- Department of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Petya D. Dimitrova
- Department of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Tsvetozara Damyanova
- Department of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
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20
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Qiu D, Ke M, Zhang Q, Zhang F, Lu T, Sun L, Qian H. Response of microbial antibiotic resistance to pesticides: An emerging health threat. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 850:158057. [PMID: 35977623 DOI: 10.1016/j.scitotenv.2022.158057] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 08/09/2022] [Accepted: 08/11/2022] [Indexed: 06/15/2023]
Abstract
The spread of microbial antibiotic resistance has seriously threatened public health globally. Non-antibiotic stressors have significantly contributed to the evolution of bacterial antibiotic resistance. Although numerous studies have been conducted on the potential risk of pesticide pollution for bacterial antibiotic resistance, a systematic review of these concerns is still lacking. In the present study, we elaborate the mechanism underlying the effects of pesticides on bacterial antibiotic resistance acquisition as well as the propagation of antimicrobial resistance. Pesticide stress enhanced the acquisition of antibiotic resistance in bacteria via various mechanisms, including the activation of efflux pumps, inhibition of outer membrane pores for resistance to antibiotics, and gene mutation induction. Horizontal gene transfer is a major mechanism whereby pesticides influence the transmission of antibiotic resistance genes (ARGs) in bacteria. Pesticides promoted the conjugation transfer of ARGs by increasing cell membrane permeability and increased the proportion of bacterial mobile gene elements, which facilitate the spread of ARGs. This review can improve our understanding regarding the pesticide-induced generation and spread of ARGs and antibiotic resistant bacteria. Moreover, it can be applied to reduce the ecological risks of ARGs in the future.
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Affiliation(s)
- Danyan Qiu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Mingjing Ke
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Qi Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Fan Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Tao Lu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Liwei Sun
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Haifeng Qian
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China.
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21
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Bernal FA, Hammann P, Kloss F. Natural products in antibiotic development: is the success story over? Curr Opin Biotechnol 2022; 78:102783. [PMID: 36088735 DOI: 10.1016/j.copbio.2022.102783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/14/2022] [Accepted: 08/02/2022] [Indexed: 12/14/2022]
Abstract
Natural product (NP)-based antibiotics have been exploited for more than eighty years and continue saving uncountable lives every year. However, antimicrobial R&D is inadequate to counteract antimicrobial resistance. The majority of marketed antibiotics are inspired by NP classes that were discovered more than 50 years ago. With the advent of advanced genomic approaches, cultivation methods, and modern analytical techniques, NP discovery holds promise that there are way more powerful antibiotic scaffolds to be discovered. However, the currently lean antibiotic R&D pipeline shows a clear trend away from NP-based programs and innovative compounds are also rare in early stages. Within this review, we give an overview of the current NP antibiotic development pipeline, elaborate constraints the field is facing, and suggest measures to streamline NP-based antibiotic discovery. It is unlikely that NPs have lost significance, but reinforcement of discovery will require more targeted efforts and support to revitalize this established source.
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Affiliation(s)
- Freddy A Bernal
- Transfer Group Anti-infectives, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute, Beutenbergstr. 11a, 07745 Jena, Germany
| | - Peter Hammann
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) and Department of Pharmacy Saarland University, Campus Building E8.1, 66123 Saarbrücken, Germany
| | - Florian Kloss
- Transfer Group Anti-infectives, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute, Beutenbergstr. 11a, 07745 Jena, Germany.
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22
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Kundar R, Gokarn K. CRISPR-Cas System: A Tool to Eliminate Drug-Resistant Gram-Negative Bacteria. Pharmaceuticals (Basel) 2022; 15:ph15121498. [PMID: 36558949 PMCID: PMC9781512 DOI: 10.3390/ph15121498] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 11/18/2022] [Accepted: 11/24/2022] [Indexed: 12/04/2022] Open
Abstract
Rapidly emerging drug-resistant superbugs, especially Gram-negative bacteria, pose a serious threat to healthcare systems all over the globe. Newer strategies are being developed to detect and overcome the arsenal of weapons that these bacteria possess. The development of antibiotics is time-consuming and may not provide full proof of action on evolving drug-resistant pathogens. The clustered regularly interspaced short palindromic repeats/CRISPR-associated protein (CRISPR/Cas) systems are promising in curbing drug-resistant bacteria. This review focuses on the pathogenesis of Gram-negative bacteria, emergence of antimicrobial drug resistance, and their treatment failures. It also draws attention to the present status of the CRISPR-Cas system in diagnosisand treatment of Gram-negative bacterial infections.
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Affiliation(s)
- Rajeshwari Kundar
- Department of Microbiology, Sir H.N. Medical Research Society, Sir H.N. Reliance Foundation Hospital & Research Centre, Mumbai 400004, Maharashtra, India
| | - Karuna Gokarn
- Department of Microbiology, Sir H.N. Medical Research Society, Sir H.N. Reliance Foundation Hospital & Research Centre, Mumbai 400004, Maharashtra, India
- Department of Microbiology, St. Xavier’s College, 5- Mahapalika Marg, Mumbai 400001, Maharashtra, India
- Correspondence: or
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Alajmi AM, Alamoudi AA, Halwani AA, Almangour TA, Almozain NH, Al-Jedai A, Tawfik EA. Antimicrobial Resistance Awareness, Antibiotics Prescription Errors and Dispensing Patterns by Community Pharmacists in Saudi Arabia. J Infect Public Health 2022; 16:34-41. [PMID: 36459709 DOI: 10.1016/j.jiph.2022.11.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 10/31/2022] [Accepted: 11/17/2022] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Antibiotic overuse and misuse have greatly facilitated the development of antimicrobial resistance (AMR). The Kingdom of Saudi Arabia is one of the countries that took a strategic approach, beginning with the prohibition of over-the-counter antibiotic dispensing, followed by the implementation of antimicrobial stewardship programs and various educational and awareness governmental activities and plans. However, the status of antibiotic prescriptions and dispensing in Saudi community pharmacies is still unclear. As a result, this study investigates community pharmacists' antibiotic dispensing practices and their knowledge of their role in fighting AMR, in addition to the status of antibiotic prescribing errors by physicians. METHOD This is an online-based survey study of 671 participants distributed among community pharmacists of large pharmacy chains throughout the Saudi Arabia. RESULT A number of 671 community pharmacists were participated in total, with a response rate of 96.57% (648 responses). The majority of community pharmacists (67%) had a long experience (>5 years) in this field. An antibiotic prescribing error was prevalent, with a mean of 3.32 per month in each pharmacy. Dentists (36.7%) and general practitioners (28.7%) were the most prescribers associated with antibiotic prescription errors. Most community pharmacists had a generally good practice of dispensing antibiotics, accounting for 71.5% of daily antibiotic dispensing. However, more than one-third of those pharmacists (35.2%) agreed on dispensing topical antibiotics without a prescription, based on their evaluation of the case presented in the pharmacy, as the majority of community pharmacists demonstrated a significant understanding of AMR. CONCLUSION The current study demonstrated that there is a good antibiotic dispensing practice in the community pharmacies in Saudi Arabia, in addition to a substantial understanding of the community pharmacist's vital role in fighting AMR. This study could inform decision-makers on antibiotic usage in Saudi community pharmacies to improve the current inappropriate antibiotic use and dispensing situation and, thus, control AMR spread in Saudi Arabia.
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Affiliation(s)
- Areej M Alajmi
- National Center of Biotechnology, Life Science and Environment Research Institute, King Abdulaziz City for Science and Technology, Riyadh 12354, Saudi Arabia
| | - Abdullah A Alamoudi
- Pharmaceutics Department, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Abdulrahman A Halwani
- Pharmaceutics Department, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; Regenerative Medicine Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 22252, Saudi Arabia
| | - Thamer A Almangour
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Nada H Almozain
- Pharmaceutical Services Department, Prince Sultan Military Medical City, Riyadh 11159, Saudi Arabia
| | - Ahmed Al-Jedai
- College of Pharmacy, College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; Therapeutic Affairs, Ministry of Health, Riyadh 12631, Saudi Arabia
| | - Essam A Tawfik
- National Center of Biotechnology, Life Science and Environment Research Institute, King Abdulaziz City for Science and Technology, Riyadh 12354, Saudi Arabia.
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Balciunaitiene A, Puzeryte V, Radenkovs V, Krasnova I, Memvanga PB, Viskelis P, Streimikyte P, Viskelis J. Sustainable-Green Synthesis of Silver Nanoparticles Using Aqueous Hyssopus officinalis and Calendula officinalis Extracts and Their Antioxidant and Antibacterial Activities. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227700. [PMID: 36431804 PMCID: PMC9696917 DOI: 10.3390/molecules27227700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/04/2022] [Accepted: 11/07/2022] [Indexed: 11/11/2022]
Abstract
Silver nanoparticles (AgNPs) biosynthesized using aqueous medical plant extracts as reducing and capping agents show multiple applicability for bacterial problems. The aim of this study was to expand the boundaries on AgNPs using a novel, low-toxicity, and cost-effective alternative and green approach to the biosynthesis of metallic NPs using Calendula officinalis (Calendula) and Hyssopus officinalis (Hyssopus) aqueous extracts. The formation of AgNPs was confirmed by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) techniques. The effectiveness of biosynthesized AgNPs in quenching free radicals and inhibiting the growth of Gram-positive and Gram-negative microorganisms was supported by in vitro antioxidant activity assay methods and using the Kirby-Bauer disk diffusion susceptibility test, respectively. The elucidated antimicrobial and antioxidative activities of medical plant extracts were compared with data from the engineered biosynthetic AgNPs. The antimicrobial effect of engineered AgNPs against selected test cultures was found to be substantially stronger than for plant extracts used for their synthesis. The analysis of AgNPs by TEM revealed the presence of spherical-shaped nano-objects. The size distribution of AgNPs was found to be plant-type-dependent. The smaller AgNPs were obtained with Hyssopus extract (with a size range of 16.8 ± 5.8 nm compared to 35.7 ± 4.8 nm from Calendula AgNPs). The AgNPs' presumably inherited biological functions of Hyssopus and Calendula medical plants can provide a platform to combat pathogenic bacteria in the era of multi-drug resistance.
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Affiliation(s)
- Aiste Balciunaitiene
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, 54333 Kaunas, Lithuania
- Correspondence: (A.B.); (P.V.); Tel.: +370-682-13568 (P.V.)
| | - Viktorija Puzeryte
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, 54333 Kaunas, Lithuania
| | - Vitalijs Radenkovs
- Processing and Biochemistry Department, Institute of Horticulture, LV-3701 Dobele, Latvia
- Research Laboratory of Biotechnology, Division of Smart Technologies, Latvia University of Life Sciences and Technologies, LV-3004 Jelgava, Latvia
| | - Inta Krasnova
- Processing and Biochemistry Department, Institute of Horticulture, LV-3701 Dobele, Latvia
| | - Patrick B. Memvanga
- Laboratory of Pharmaceutics and Phytopharmaceutical Drug Development, Faculty of Pharmaceutical Sciences, University of Kinshasa, B.P. 212, Kinshasa 012, Congo
- Department of Pharmacy, Faculty of Medecine and Pharmacy, University of Kisangani, B.P. 212, Kisangani 012, Congo
- Department of Pharmacy, Faculty of Pharmaceutical Sciences and Public Health, Official University of Bukavu, Bukavu B.P. 570, Congo
- Centre de Recherche et d’Innovation Technologique en Environnement et en Sciences de la Santé (CRITESS), University of Kinshasa, B.P. 212, Kinshasa 012, Congo
| | - Pranas Viskelis
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, 54333 Kaunas, Lithuania
- Correspondence: (A.B.); (P.V.); Tel.: +370-682-13568 (P.V.)
| | - Paulina Streimikyte
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, 54333 Kaunas, Lithuania
| | - Jonas Viskelis
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, 54333 Kaunas, Lithuania
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25
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González-Villarreal JA, González-Lozano KJ, Aréchiga-Carvajal ET, Morlett-Chávez JA, Luévanos-Escareño MP, Balagurusamy N, Salinas-Santander MA. Molecular mechanisms of multidrug resistance in clinically relevant enteropathogenic bacteria (Review). Exp Ther Med 2022; 24:753. [PMID: 36561977 PMCID: PMC9748766 DOI: 10.3892/etm.2022.11689] [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: 06/27/2022] [Accepted: 09/21/2022] [Indexed: 11/11/2022] Open
Abstract
Multidrug resistant (MDR) enteropathogenic bacteria are a growing problem within the clinical environment due to their acquired tolerance to a wide range of antibiotics, thus causing severe illnesses and a tremendous economic impact in the healthcare sector. Due to its difficult treatment, knowledge and understanding of the molecular mechanisms that confer this resistance are needed. The aim of the present review is to describe the mechanisms of antibiotic resistance from a genomic perspective observed in bacteria, including naturally acquired resistance. The present review also discusses common pharmacological and alternative treatments used in cases of infection caused by MDR bacteria, thus covering necessary information for the development of novel antimicrobials and adjuvant molecules inhibiting bacterial proliferation.
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Affiliation(s)
| | - Katia Jamileth González-Lozano
- Microbiology Department, Phytopathology and Mycology Laboratory, Faculty of Biological Sciences, Genetic Manipulation Unit, Autonomous University of Nuevo Leon, Monterrey, Nuevo León 66459, Mexico
| | - Elva Teresa Aréchiga-Carvajal
- Microbiology Department, Phytopathology and Mycology Laboratory, Faculty of Biological Sciences, Genetic Manipulation Unit, Autonomous University of Nuevo Leon, Monterrey, Nuevo León 66459, Mexico
| | - Jesús Antonio Morlett-Chávez
- Research Department, Faculty of Medicine Saltillo Unit, Autonomous University of Coahuila, Saltillo, Coahuila 25000, Mexico
| | | | - Nagamani Balagurusamy
- Bioremediation Laboratory, Faculty of Biological Sciences, Autonomous University of Coahuila, Torreón, Coahuila 27275, Mexico
| | - Mauricio Andrés Salinas-Santander
- Research Department, Faculty of Medicine Saltillo Unit, Autonomous University of Coahuila, Saltillo, Coahuila 25000, Mexico,Correspondence to: Dr Mauricio Andrés Salinas-Santander, Research Department, Faculty of Medicine Saltillo Unit, Autonomous University of Coahuila, Calle Francisco Murguía Sur 205, Zona Centro, Saltillo, Coahuila 25000, Mexico
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26
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Govindasamy GA, S. M. N. Mydin RB, Harun NH, Effendy WNFWE, Sreekantan S. Giant milkweed plant-based copper oxide nanoparticles for wound dressing application: physicochemical, bactericidal and cytocompatibility profiles. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02513-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Antimicrobial Peptides Mediate Apoptosis by Changing Mitochondrial Membrane Permeability. Int J Mol Sci 2022; 23:ijms232112732. [PMID: 36361521 PMCID: PMC9653759 DOI: 10.3390/ijms232112732] [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: 08/22/2022] [Revised: 10/19/2022] [Accepted: 10/19/2022] [Indexed: 01/25/2023] Open
Abstract
Changes in mitochondrial membrane permeability are closely associated with mitochondria-mediated apoptosis. Antimicrobial peptides (AMPs), which have been found to enter cells to exert physiological effects, cause damage to the mitochondria. This paper reviews the molecular mechanisms of AMP-mediated apoptosis by changing the permeability of the mitochondrial membrane through three pathways: the outer mitochondrial membrane (OMM), inner mitochondrial membrane (IMM), and mitochondrial permeability transition pore (MPTP). The roles of AMPs in inducing changes in membrane permeability and apoptosis are also discussed. Combined with recent research results, the possible application prospects of AMPs are proposed to provide a theoretical reference for the development of AMPs as therapeutic agents for human diseases.
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28
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Qais FA, Ahmad I. Anti-quorum sensing and biofilm inhibitory effect of some medicinal plants against gram-negative bacterial pathogens: in vitro and in silico investigations. Heliyon 2022; 8:e11113. [PMID: 36311355 PMCID: PMC9614860 DOI: 10.1016/j.heliyon.2022.e11113] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/16/2021] [Accepted: 10/11/2022] [Indexed: 11/06/2022] Open
Abstract
Multidrug resistance (MDR) in pathogenic bacteria have become a major clinical issue. Quorum sensing regulated bacterial virulence is a promising key drug target for MDR infections. Therefore, the aim of the present work was to assess the anti-quorum sensing properties of selected medicinal plants against bacterial pathogens as well in silico interaction of selected bioactive phytocompounds with QS and biofilm-associated proteins. Based on the ethnopharmacological usage, 18 plants were selected using methanolic extract against Chromobacterium violaceum 12472. The most active extract (Acacia nilotica) was fractionated in increasing polarity solvents (n-hexane, chloroform and ethyl acetate) and tested for anti-QS activity. The most active fraction i.e. ethyl acetate fraction was evaluated for their activity at sub-MICs against QS-associated virulence factors of Pseudomonas aeruginosa PAO1 and Serretia marcescens MTCC 97. Microtiter plate assay and light microscopy was used to determine inhibition of biofilm. Phytochemicals of the ethyl acetate fraction were analysed by GC/MS and LC/MS. Phytocompounds were docked with QS (LasI, LasR, CviR, and rhlR) and biofilm proteins (PilY1 and PilT) using Auto dock vina. The MIC of ethyl acetate fraction determined was 250, 500, and 1000 μg/ml against C. violaceum 12472, P. aeruginosa PAO1, and S. marcescens MTCC97 respectively. At sub-MICs QS regulated virulence factors production and inhibited biofilms broadly (more than 50 percent). GC/MS detected the major bioactive compound benzoic acid, 3,4,5-trihydroxy-, methyl ester (61.24 %) and LC-MS detected Retronecine for the first time in A. nilotica pods. In silico, dehydroabietic acid occupied the same cavity as its antagonist in the CviR ligand binding domain. Also, betulin and epicatechin gallate interact with biofilm proteins PilY1 and PilT, preventing biofilm formation. The findings suggest that the phytochemicals of A. nilotica pod could be exploited as an anti-QS agent against Gram-negative pathogens. To discover therapeutic efficacy of standardised bioactive extract/phytochemicals must be tested under in vivo condition.
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Haseeb A, Faidah HS, Alghamdi S, Alotaibi AF, Elrggal ME, Mahrous AJ, Abuhussain SSA, Obaid NA, Algethamy M, AlQarni A, Khogeer AA, Saleem Z, Iqbal MS, Ashgar SS, Radwan RM, Mutlaq A, Fatani N, Sheikh A. Dose optimization of β-lactams antibiotics in pediatrics and adults: A systematic review. Front Pharmacol 2022; 13:964005. [PMID: 36210807 PMCID: PMC9532942 DOI: 10.3389/fphar.2022.964005] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 08/09/2022] [Indexed: 11/13/2022] Open
Abstract
Background: β-lactams remain the cornerstone of the empirical therapy to treat various bacterial infections. This systematic review aimed to analyze the data describing the dosing regimen of β-lactams. Methods: Systematic scientific and grey literature was performed in accordance with Preferred Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines. The studies were retrieved and screened on the basis of pre-defined exclusion and inclusion criteria. The cohort studies, randomized controlled trials (RCT) and case reports that reported the dosing schedule of β-lactams are included in this study. Results: A total of 52 studies met the inclusion criteria, of which 40 were cohort studies, 2 were case reports and 10 were RCTs. The majority of the studies (34/52) studied the pharmacokinetic (PK) parameters of a drug. A total of 20 studies proposed dosing schedule in pediatrics while 32 studies proposed dosing regimen among adults. Piperacillin (12/52) and Meropenem (11/52) were the most commonly used β-lactams used in hospitalized patients. As per available evidence, continuous infusion is considered as the most appropriate mode of administration to optimize the safety and efficacy of the treatment and improve the clinical outcomes. Conclusion: Appropriate antibiotic therapy is challenging due to pathophysiological changes among different age groups. The optimization of pharmacokinetic/pharmacodynamic parameters is useful to support alternative dosing regimens such as an increase in dosing interval, continuous infusion, and increased bolus doses.
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Affiliation(s)
- Abdul Haseeb
- Department of Clinical Pharmacy, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
- *Correspondence: Abdul Haseeb,
| | - Hani Saleh Faidah
- Department of Microbiology, Faculty of Medicine, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Saleh Alghamdi
- Department of Clinical Pharmacy, Faculty of Clinical Pharmacy, Al Baha University, Al Baha, Saudi Arabia
| | - Amal F. Alotaibi
- Department of Clinical Pharmacy, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Mahmoud Essam Elrggal
- Department of Clinical Pharmacy, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Ahmad J. Mahrous
- Department of Clinical Pharmacy, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | | | - Najla A. Obaid
- Department of Pharmaceutics, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Manal Algethamy
- Department of Infection Prevention and Control Program, Alnoor Specialist Hospital, Makkah, Saudi Arabia
| | - Abdullmoin AlQarni
- Infectious Diseases Department, Alnoor Specialist Hospital, Makkah, Saudi Arabia
| | - Asim A. Khogeer
- Plan and Research Department, General Directorate of Health Affairs of Makkah Region, Ministry of Health, Makkah, Saudi Arabia
- Medical Genetics Unit, Maternity and Children Hospital, Makkah Healthcare Cluster, Ministry of Health, Makkah, Saudi Arabia
| | - Zikria Saleem
- Department of Pharmacy Practice, Faculty of Pharmacy, Bahauddin Zakariya Univrsity, Multan, Pakistan
| | - Muhammad Shahid Iqbal
- Department of Clinical Pharmacy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Sami S. Ashgar
- Department of Microbiology, Faculty of Medicine, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Rozan Mohammad Radwan
- Pharmaceutical Care Department, Alnoor Specialist Hospital, Ministry of Health, Makkah, Saudi Arabia
| | - Alaa Mutlaq
- General Department of Pharmaceutical Care, Ministry of Health, Riyadh, Saudi Arabia
| | | | - Aziz Sheikh
- Usher Institute, The University of Edinburgh, Edinburgh, United Kingdom
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30
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ESKAPE Pathogens: Looking at Clp ATPases as Potential Drug Targets. Antibiotics (Basel) 2022; 11:antibiotics11091218. [PMID: 36139999 PMCID: PMC9495089 DOI: 10.3390/antibiotics11091218] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/05/2022] [Accepted: 09/06/2022] [Indexed: 11/29/2022] Open
Abstract
Bacterial antibiotic resistance is rapidly growing globally and poses a severe health threat as the number of multidrug resistant (MDR) and extensively drug-resistant (XDR) bacteria increases. The observed resistance is partially due to natural evolution and to a large extent is attributed to antibiotic misuse and overuse. As the rate of antibiotic resistance increases, it is crucial to develop new drugs to address the emergence of MDR and XDR pathogens. A variety of strategies are employed to address issues pertaining to bacterial antibiotic resistance and these strategies include: (1) the anti-virulence approach, which ultimately targets virulence factors instead of killing the bacterium, (2) employing antimicrobial peptides that target key proteins for bacterial survival and, (3) phage therapy, which uses bacteriophages to treat infectious diseases. In this review, we take a renewed look at a group of ESKAPE pathogens which are known to cause nosocomial infections and are able to escape the bactericidal actions of antibiotics by reducing the efficacy of several known antibiotics. We discuss previously observed escape mechanisms and new possible therapeutic measures to combat these pathogens and further suggest caseinolytic proteins (Clp) as possible therapeutic targets to combat ESKAPE pathogens. These proteins have displayed unmatched significance in bacterial growth, viability and virulence upon chronic infection and under stressful conditions. Furthermore, several studies have showed promising results with targeting Clp proteins in bacterial species, such as Mycobacterium tuberculosis, Staphylococcus aureus and Bacillus subtilis.
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Franco D, Calabrese G, Guglielmino SPP, Conoci S. Metal-Based Nanoparticles: Antibacterial Mechanisms and Biomedical Application. Microorganisms 2022; 10:microorganisms10091778. [PMID: 36144380 PMCID: PMC9503339 DOI: 10.3390/microorganisms10091778] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/21/2022] [Accepted: 08/31/2022] [Indexed: 11/22/2022] Open
Abstract
The growing increase in antibiotic-resistant bacteria has led to the search for new antibacterial agents capable of overcoming the resistance problem. In recent years, nanoparticles (NPs) have been increasingly used to target bacteria as an alternative to antibiotics. The most promising nanomaterials for biomedical applications are metal and metal oxide NPs, due to their intrinsic antibacterial activity. Although NPs show interesting antibacterial properties, the mechanisms underlying their action are still poorly understood, limiting their use in clinical applications. In this review, an overview of the mechanisms underlying the antibacterial activity of metal and metal oxide NPs will be provided, relating their efficacy to: (i) bacterial strain; (ii) higher microbial organizations (biofilm); (iii) and physico-chemical properties of NPs. In addition, bacterial resistance strategies will be also discussed to better evaluate the feasibility of the different treatments adopted in the clinical safety fields. Finally, a wide analysis on recent biomedical applications of metal and metal oxide NPs with antibacterial activity will be provided.
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Affiliation(s)
- Domenico Franco
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno d’Alcontres, 31, 98168 Messina, Italy
| | - Giovanna Calabrese
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno d’Alcontres, 31, 98168 Messina, Italy
- Correspondence:
| | - Salvatore Pietro Paolo Guglielmino
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno d’Alcontres, 31, 98168 Messina, Italy
| | - Sabrina Conoci
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno d’Alcontres, 31, 98168 Messina, Italy
- Department of Chemistry ‘‘Giacomo Ciamician’’, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
- LabSense Beyond Nano, URT Department of Physic, National Research Council (CNR), Viale Ferdinando Stagno d’Alcontres, 31, 98168 Messina, Italy
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Fernández-García L, Muthami JM, Tomas M, Wood TK. What are the options for treating infections by persister-forming pathogens? Environ Microbiol 2022; 24:4500-4504. [PMID: 35912818 DOI: 10.1111/1462-2920.16117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 06/21/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Laura Fernández-García
- Department of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania, USA.,Microbiology Translational and Multidisciplinary (MicroTM)-Research Institute Biomedical A Coruña (INIBIC) and Microbiology Department of Hospital A Coruña (CHUAC), University of A Coruña (UDC), A Coruña, Spain
| | - Joy M Muthami
- Department of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Maria Tomas
- Microbiology Translational and Multidisciplinary (MicroTM)-Research Institute Biomedical A Coruña (INIBIC) and Microbiology Department of Hospital A Coruña (CHUAC), University of A Coruña (UDC), A Coruña, Spain
| | - Thomas K Wood
- Department of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania, USA
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Getahun YA, Ali DA, Taye BW, Alemayehu YA. Multidrug-Resistant Microbial Therapy Using Antimicrobial Peptides and the CRISPR/Cas9 System. Vet Med (Auckl) 2022; 13:173-190. [PMID: 35983086 PMCID: PMC9379109 DOI: 10.2147/vmrr.s366533] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 07/27/2022] [Indexed: 11/24/2022]
Abstract
The emergence and spread of multidrug-resistant microbes become a serious threat to animal and human health globally because of their less responsiveness to conventional antimicrobial therapy. Multidrug-resistant microbial infection poses higher morbidity and mortality rate with significant economic losses. Currently, antimicrobial peptides and the CRISPR/Cas9 system are explored as alternative therapy to circumvent the challenges of multidrug-resistant organisms. Antimicrobial peptides are small molecular weight, cationic peptides extracted from all living organisms. It is a promising drug candidate for the treatment of multidrug-resistant microbes by direct microbial killing or indirectly modulating the innate immune system. The CRISPR/Cas9 system is another novel antimicrobial alternative used to manage multidrug-resistant microbial infection. It is a versatile gene-editing tool that uses engineered single guide RNA for targeted gene recognition and the Cas9 enzyme for the destruction of target nucleic acids. Both the CRISPR/Cas9 system and antimicrobial peptides were used to successfully treat nosocomial infections caused by ESKAPE pathogens, which developed resistance to various antimicrobials. Despite, their valuable roles in multidrug-resistant microbial treatments, both the antimicrobial peptides and the CRISPR/Cas systems have various limitations like toxicity, instability, and incurring high manufacturing costs. Thus, this review paper gives detailed explanations of the roles of the CRISPR/Cas9 system and antimicrobial peptides in circumventing the challenges of multidrug-resistant microbial infections, its limitation and prospects in clinical applications.
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Affiliation(s)
- Yared Abate Getahun
- Livestock and Fishery Research Center, College of Agriculture, Arba Minch University, Arba Minch, Southern Nation Nationalities and Peoples Regional State, Ethiopia
- Correspondence: Yared Abate Getahun, Email
| | - Destaw Asfaw Ali
- Department of Paraclinical Studies, College of Veterinary Medicine, Gondar University, Gondar City, Amhara Regional State, Ethiopia
| | - Bihonegn Wodajnew Taye
- Faculty of Veterinary Medicine, College of Agriculture, Assosa University, Assosa City, Benshangul Gumez Regional State, Ethiopia
| | - Yismaw Alemie Alemayehu
- Department of Animal Science, College of Agriculture, Wollega University, Nekemtie City, Oromia Regional State, Ethiopia
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Jampilek J. Novel avenues for identification of new antifungal drugs and current challenges. Expert Opin Drug Discov 2022; 17:949-968. [PMID: 35787715 DOI: 10.1080/17460441.2022.2097659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION : Some of otherwise useful fungi are pathogenic to humans, and unfortunately, the number of these pathogens is increasing. In addition to common skin infections, these opportunistic pathogens are able to cause severe, often incurable, systemic mycoses. AREAS COVERED : The number of antifungal drugs is limited, especially drugs that can be used for systemic administration, and resistance to these drugs is very common. This review summarizes various approaches to the discovery and development of new antifungal drugs, provides an overview of the most important molecules in terms of basic (laboratory) research and compounds currently in clinical trials, and focuses on drug repurposing strategy, while providing an overview of drugs of other indications that have been tested in vitro for their antifungal activity for possible expansion of antifungal drugs and/or support of existing antimycotics. EXPERT OPINION : Despite the limitations of the research of new antifungal drugs by pharmaceutical manufacturers, in addition to innovated molecules based on clinically used drugs, several completely new small entities with unique mechanisms of actions have been identified. The identification of new molecular targets that offer alternatives for the development of new unique selective antifungal highly effective agents has been an important outcome of repurposing of non-antifungal drugs to antifungal drug. Also, given the advances in monoclonal antibodies and their application to immunosuppressed patients, it may seem possible to predict a more optimistic future for antifungal therapy than has been the case in recent decades.
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Affiliation(s)
- Josef Jampilek
- Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University, Ilkovicova 6, 842 15 Bratislava, Slovakia.,Institute of Neuroimmunology, Slovak Academy of Sciences, Dubravska Cesta 9, 845 10 Bratislava, Slovakia
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Tarín-Pelló A, Suay-García B, Pérez-Gracia MT. Antibiotic resistant bacteria: current situation and treatment options to accelerate the development of a new antimicrobial arsenal. Expert Rev Anti Infect Ther 2022; 20:1095-1108. [PMID: 35576494 DOI: 10.1080/14787210.2022.2078308] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Antibiotic resistance is one of the biggest public health threats worldwide. Currently, antibiotic-resistant bacteria kill 700,000 people every year. These data represent the near future in which we find ourselves, a "post-antibiotic era" where the identification and development of new treatments are key. This review is focused on the current and emerging antimicrobial therapies which can solve this global threat. AREAS COVERED Through a literature search using databases such as Medline and Web of Science, and search engines such as Google Scholar, different antimicrobial therapies were analyzed, including pathogen-oriented therapy, phagotherapy, microbiota and antivirulent therapy. Additionally, the development pathways of new antibiotics were described, emphasizing on the potential advantages that the combination of a drug repurposing strategy with the application of mathematical prediction models could bring to solve the problem of AMRs. EXPERT OPINION This review offers several starting points to solve a single problem: reducing the number of AMR. The data suggest that the strategies described could provide many benefits to improve antimicrobial treatments. However, the development of new antimicrobials remains necessary. Drug repurposing, with the application of mathematical prediction models, is considered to be of interest due to its rapid and effective potential to increase the current therapeutic arsenal.
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Affiliation(s)
- Antonio Tarín-Pelló
- Área de Microbiología, Departamento de Farmacia, Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud
| | - Beatriz Suay-García
- ESI International Chair@CEU-UCH, Departamento de Matemáticas, Física y Ciencias Tecnológicas, Universidad Cardenal Herrera-CEU, CEU Universities, C/ Santiago Ramón y Cajal, 46115 Alfara del Patriarca, Valencia, Spain
| | - María-Teresa Pérez-Gracia
- Área de Microbiología, Departamento de Farmacia, Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud
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Jampilek J. Drug repurposing to overcome microbial resistance. Drug Discov Today 2022; 27:2028-2041. [PMID: 35561965 DOI: 10.1016/j.drudis.2022.05.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 05/02/2022] [Accepted: 05/06/2022] [Indexed: 12/15/2022]
Abstract
Infections are a growing global threat, and the number of resistant species of microbial pathogens is alarming. However, the rapid development of cross-resistant or multidrug-resistant strains and the development of so-called 'superbugs' are in stark contrast to the number of newly launched anti-infectives on the market. In this review, I summarize the causes of antimicrobial resistance, briefly discuss different approaches to the discovery and development of new anti-infective drugs, and focus on drug repurposing strategy, which is discussed from all possible perspectives. A comprehensive overview of drugs of other indications tested for their in vitro antimicrobial activity to support existing anti-infective therapeutics is provided, including several critical remarks on this strategy of repurposing non-antibiotics to antibacterial drugs.
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Affiliation(s)
- Josef Jampilek
- Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University, Ilkovicova 6, 842 15 Bratislava, Slovakia; Department of Chemical Biology, Faculty of Science, Palacky University, Slechtitelu 27, 783 71 Olomouc, Czech Republic.
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Hulea A, Obiștioiu D, Cocan I, Alexa E, Negrea M, Neacșu AG, Hulea C, Pascu C, Costinar L, Iancu I, Tîrziu E, Herman V. Diversity of Monofloral Honey Based on the Antimicrobial and Antioxidant Potential. Antibiotics (Basel) 2022; 11:antibiotics11050595. [PMID: 35625239 PMCID: PMC9137981 DOI: 10.3390/antibiotics11050595] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 04/26/2022] [Accepted: 04/27/2022] [Indexed: 02/06/2023] Open
Abstract
This study aimed to investigate the antioxidant profile and the antimicrobial activity of four different types of monofloral honey (manuka (MH), brassica rapeseed (BH), acacia (AH), and linden honey (LH)) against some bacterial/fungal ATCC strains and some multidrug-resistant strains isolated from chronic otitis in dogs. For the characterisation of the antioxidant profile of each honey, we extracted the honey samples by hydroalcoholic extraction and analysed them in terms of total polyphenols (TPC), total flavonoids (TFC), and 2,2-diphenyl-1-picrylhydrazyl (DPPH) using the spectrophotometric method. The antimicrobial activity was determined using the microdilution method at concentrations of 10%, 15%, and 20%, with the results expressed in OD (optical density) calculated as BIR% (bacterial inhibition rate)/MIR% (mycelial inhibition rate). The antioxidant characterisation of the analysed honey samples showed the highest antioxidant activity and concentrations of TPC and TFC in MH, followed by LH. MH was proven to be the most effective on most clinical isolates concerning the antimicrobial activity in comparison with BH, AH, and LH. Except for B. cepacia and P. vulgaris, all the clinical isolates were sensitive to the antibacterial activity of honey. Regarding the ATCC strains, MH 10% was the most effective in inhibiting all the strains tested except for P. aeruginosa. In conclusion, the efficacy classification in our study was MH > BH > AH > LH.
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Affiliation(s)
- Anca Hulea
- Faculty of Veterinary Medicine, Banat University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” Timisoara, Calea Aradului No. 119, 300645 Timisoara, Romania; (A.H.); (C.H.); (C.P.); (L.C.); (I.I.); (E.T.); (V.H.)
| | - Diana Obiștioiu
- Faculty of Veterinary Medicine, Banat University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” Timisoara, Calea Aradului No. 119, 300645 Timisoara, Romania; (A.H.); (C.H.); (C.P.); (L.C.); (I.I.); (E.T.); (V.H.)
- Correspondence: (D.O.); (I.C.)
| | - Ileana Cocan
- Faculty of Food Engineering, Banat University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” Timisoara, Calea Aradului No. 119, 300645 Timisoara, Romania; (E.A.); (M.N.)
- Correspondence: (D.O.); (I.C.)
| | - Ersilia Alexa
- Faculty of Food Engineering, Banat University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” Timisoara, Calea Aradului No. 119, 300645 Timisoara, Romania; (E.A.); (M.N.)
| | - Monica Negrea
- Faculty of Food Engineering, Banat University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” Timisoara, Calea Aradului No. 119, 300645 Timisoara, Romania; (E.A.); (M.N.)
| | - Alina-Georgeta Neacșu
- Faculty of Agriculture, Banat University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” Timisoara, Calea Aradului No. 119, 300641 Timisoara, Romania;
| | - Călin Hulea
- Faculty of Veterinary Medicine, Banat University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” Timisoara, Calea Aradului No. 119, 300645 Timisoara, Romania; (A.H.); (C.H.); (C.P.); (L.C.); (I.I.); (E.T.); (V.H.)
| | - Corina Pascu
- Faculty of Veterinary Medicine, Banat University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” Timisoara, Calea Aradului No. 119, 300645 Timisoara, Romania; (A.H.); (C.H.); (C.P.); (L.C.); (I.I.); (E.T.); (V.H.)
| | - Luminita Costinar
- Faculty of Veterinary Medicine, Banat University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” Timisoara, Calea Aradului No. 119, 300645 Timisoara, Romania; (A.H.); (C.H.); (C.P.); (L.C.); (I.I.); (E.T.); (V.H.)
| | - Ionica Iancu
- Faculty of Veterinary Medicine, Banat University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” Timisoara, Calea Aradului No. 119, 300645 Timisoara, Romania; (A.H.); (C.H.); (C.P.); (L.C.); (I.I.); (E.T.); (V.H.)
| | - Emil Tîrziu
- Faculty of Veterinary Medicine, Banat University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” Timisoara, Calea Aradului No. 119, 300645 Timisoara, Romania; (A.H.); (C.H.); (C.P.); (L.C.); (I.I.); (E.T.); (V.H.)
| | - Viorel Herman
- Faculty of Veterinary Medicine, Banat University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” Timisoara, Calea Aradului No. 119, 300645 Timisoara, Romania; (A.H.); (C.H.); (C.P.); (L.C.); (I.I.); (E.T.); (V.H.)
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Chen C, Oelschlaeger P, Wang D, Xu H, Wang Q, Wang C, Zhao A, Yang KW. Structure and Mechanism-Guided Design of Dual Serine/Metallo-Carbapenemase Inhibitors. J Med Chem 2022; 65:5954-5974. [PMID: 35420040 DOI: 10.1021/acs.jmedchem.2c00213] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Serine/metallo-carbapenemase-coproducing pathogens, often referred to as "superbugs", are a significant clinical problem. They hydrolyze nearly all available β-lactam antibiotics, especially carbapenems considered as last-resort antibiotics, seriously endangering efficacious antibacterial treatment. Despite the continuous global spread of carbapenem resistance, no dual-action inhibitors are available in therapy. This Perspective is the first systematic investigation of all chemotypes, modes of inhibition, and crystal structures of dual serine/metallo-carbapenemase inhibitors. An overview of the key strategy for designing dual serine/metallo-carbapenemase inhibitors and their mechanism of action is provided, as guiding rules for the development of clinically available dual inhibitors, coadministrated with carbapenems, to overcome the carbapenem resistance issue.
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Affiliation(s)
- Cheng Chen
- College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Peter Oelschlaeger
- Department of Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, 309 East Second Street, Pomona 91766, California, United States
| | - Dongmei Wang
- College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Hao Xu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310030, P. R. China
| | - Qian Wang
- Department of Clinical Laboratory, The First Affiliated Hospital of Henan University of Chinese Medicine, Jinshui District 450046, Zhengzhou, P. R. China
| | - Cheng Wang
- College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Aiguo Zhao
- College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China
| | - Ke-Wu Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, P. R. China
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Olaifa K, Ajunwa O, Marsili E. Electroanalytic evaluation of antagonistic effect of azole fungicides on Acinetobacter baumannii biofilms. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.139837] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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40
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Kandwal S, Fayne D. Repurposing drugs for treatment of SARS-CoV-2 infection: computational design insights into mechanisms of action. J Biomol Struct Dyn 2022; 40:1316-1330. [PMID: 32964805 PMCID: PMC7544922 DOI: 10.1080/07391102.2020.1825232] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 09/12/2020] [Indexed: 12/15/2022]
Abstract
The COVID-19 pandemic has negatively affected human life globally. It has led to economic crises and health emergencies across the world, spreading rapidly among the human population and has caused many deaths. Currently, there are no treatments available for COVID-19 so there is an urgent need to develop therapeutic interventions that could be used against the novel coronavirus infection. In this research, we used computational drug design technologies to repurpose existing drugs as inhibitors of SARS-CoV-2 viral proteins. The Broad Institute's Drug Repurposing Hub consists of in-development/approved drugs and was computationally screened to identify potential hits which could inhibit protein targets encoded by the SARS-CoV-2 genome. By virtually screening the Broad collection, using rationally designed pharmacophore features, we identified molecules which may be repurposed against viral nucleocapsid and non-structural proteins. The pharmacophore features were generated after careful visualisation of the interactions between co-crystalised ligands and the protein binding site. The ChEMBL database was used to determine the compound's level of inhibition of SARS-CoV-2 and correlate the predicted viral protein target with whole virus in vitro data. The results from this study may help to accelerate drug development against COVID-19 and the hit compounds should be progressed through further in vitro and in vivo studies on SARS-CoV-2.
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Affiliation(s)
- Shubhangi Kandwal
- Department of Clinical Medicine, Trinity Translational Medicine Institute, Trinity College Dublin, Dublin, Ireland
| | - Darren Fayne
- Molecular Design Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
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41
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OUP accepted manuscript. J Antimicrob Chemother 2022; 77:1272-1281. [DOI: 10.1093/jac/dkac044] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 01/26/2022] [Indexed: 11/15/2022] Open
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Multidrug resistance crisis during COVID-19 pandemic: Role of anti-microbial peptides as next-generation therapeutics. Colloids Surf B Biointerfaces 2021; 211:112303. [PMID: 34952285 PMCID: PMC8685351 DOI: 10.1016/j.colsurfb.2021.112303] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 12/03/2021] [Accepted: 12/16/2021] [Indexed: 02/07/2023]
Abstract
The decreasing effectiveness of conventional drugs due to multidrug-resistance is a major challenge for the scientific community, necessitating development of novel antimicrobial agents. In the present era of coronavirus 2 (COVID-19) pandemic, patients are being widely exposed to antimicrobial drugs and hence the problem of multidrug-resistance shall be aggravated in the days to come. Consequently, revisiting the phenomena of multidrug resistance leading to formulation of effective antimicrobial agents is the need of the hour. As a result, this review sheds light on the looming crisis of multidrug resistance in wake of the COVID-19 pandemic. It highlights the problem, significance and approaches for tackling microbial resistance with special emphasis on anti-microbial peptides as next-generation therapeutics against multidrug resistance associated diseases. Antimicrobial peptides exhibit exceptional mechanism of action enabling rapid killing of microbes at low concentration, antibiofilm activity, immunomodulatory properties along with a low tendency for resistance development providing them an edge over conventional antibiotics. The review is unique as it discusses the mode of action, pharmacodynamic properties and application of antimicrobial peptides in areas ranging from therapeutics to agriculture.
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Alghamdi S. The role of vaccines in combating antimicrobial resistance (AMR) bacteria. Saudi J Biol Sci 2021; 28:7505-7510. [PMID: 34867055 PMCID: PMC8626314 DOI: 10.1016/j.sjbs.2021.08.054] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/08/2021] [Accepted: 08/16/2021] [Indexed: 12/24/2022] Open
Abstract
Most pathogens have developed an intrinsic capacity to thrive by developing resistance to antimicrobial compounds utilized in treatment. Antimicrobial resistance arises when microbial agents such as bacteria, viruses, fungi, and parasites alter their behaviour to make current conventional medicines inefficient. Vaccination is one of the most effective strategies to fight antimicrobial resistance. Vaccines, unlike drugs, are less likely to produce resistance since they are precise to their target illnesses. Vaccines against infectious agents such as Streptococcus pneumoniae and Haemophilus influenzae have already been shown to reduce tolerance to antimicrobial medications; however, vaccines against some antimicrobial-resistant pathogens such as Vibrio cholerae, Salmonella typhi, Escherichia coli, nosocomial infections, and pulmonary and diarrheal disease viruses require more research and development. This paper describes vaccine roles in combatting antimicrobial resistance, quantifies the overall advantages of vaccination as an anti-antimicrobial resistance approach, analyzes existing antimicrobial vaccines and those currently under development, and emphasizes some of the obstacles and prospects of vaccine research and development.
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Affiliation(s)
- Saad Alghamdi
- Laboratory Medicne Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
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Li H, Li T, Zhang L, Hu Q, Liao X, Jiang Q, Qiu X, Li L, Draheim RR, Huang Q, Zhou R. Antimicrobial compounds from an FDA-approved drug library with activity against Streptococcus suis. J Appl Microbiol 2021; 132:1877-1886. [PMID: 34800069 DOI: 10.1111/jam.15377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 10/12/2021] [Accepted: 11/17/2021] [Indexed: 02/03/2023]
Abstract
AIM Antimicrobial resistance (AMR) has become a global concern. Developing novel antimicrobials is one of the most effective approaches in tackling AMR. Considering its relatively low cost and risk, drug repurposing has been proposed as a valuable approach for novel antimicrobial discovery. The aim of this study was to screen for antimicrobial compounds against Streptococcus suis, an important zoonotic bacterial pathogen, from an Food and Drug Administration (FDA)-approved drug library. METHODS AND RESULTS In this study, we tested the antimicrobial activity of 1815 FDA-approved drugs against S. suis. Sixty-seven hits were obtained that showed a growth inhibition of more than 98%. After excluding already known antibiotics and antiseptics, 12 compounds were subjected to minimal inhibition concentration (MIC) assessment against S. suis. This showed that pralatrexate, daunorubicin (hydrochloride), teniposide, aclacinomycin A hydrochloride and floxuridine gave a relatively low MIC, ranging from 0.85 to 5.25 μg/ml. Apart from pralatrexate, the remaining four drugs could also inhibit the growth of antimicrobial-resistant S. suis. It was also demonstrated that these four drugs had better efficacy against Gram-positive bacteria than Gram-negative bacteria. Cytotoxicity assays showed that floxuridine and teniposide had a relatively high 50% cytotoxic concentration (CC50 ). The in vivo efficacy of floxuridine was analysed using a Galleria mellonella larvae infection model, and the results showed that floxuridine was effective in treating S. suis infection in vivo. CONCLUSIONS Five compounds from the FDA-approved drug library showed high antimicrobial activity against S. suis, among which floxuridine displayed potent in vivo efficacy that is worth further development. SIGNIFICANCE AND IMPACT OF STUDY Our study identified several antimicrobial compounds that are effective against S. suis, which provides a valuable starting point for further antimicrobial development.
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Affiliation(s)
- Haotian Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Tingting Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Liangsheng Zhang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Qiao Hu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Xia Liao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Qinggen Jiang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Xiuxiu Qiu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Lu Li
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Cooperative Innovation Center of Sustainable Pig Production, Wuhan, China.,International Research Center for Animal Disease (Ministry of Science & Technology of China), Wuhan, China
| | - Roger R Draheim
- School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, UK
| | - Qi Huang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Cooperative Innovation Center of Sustainable Pig Production, Wuhan, China.,International Research Center for Animal Disease (Ministry of Science & Technology of China), Wuhan, China
| | - Rui Zhou
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.,Cooperative Innovation Center of Sustainable Pig Production, Wuhan, China.,International Research Center for Animal Disease (Ministry of Science & Technology of China), Wuhan, China
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Othman IM, Mahross MH, Gad-Elkareem MA, Rudrapal M, Gogoi N, Chetia D, Aouadi K, Snoussi M, Kadri A. Toward a treatment of antibacterial and antifungal infections: Design, synthesis and in vitro activity of novel arylhydrazothiazolylsulfonamides analogues and their insight of DFT, docking and molecular dynamic simulations. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130862] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Coupri D, Verneuil N, Hartke A, Liebaut A, Lequeux T, Pfund E, Budin-Verneuil A. Inhibition of d-alanylation of teichoic acids overcomes resistance of methicillin-resistant Staphylococcus aureus. J Antimicrob Chemother 2021; 76:2778-2786. [PMID: 34450626 PMCID: PMC8521394 DOI: 10.1093/jac/dkab287] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 07/17/2021] [Indexed: 12/12/2022] Open
Abstract
Background MRSA are high-priority multidrug-resistant pathogens. Although there are still some antibiotics active against MRSA, continuous efforts to discover new antibiotics and treatment strategies are needed because resistance to these new drugs has already been reported. Objectives Here we explore if d-alanylation of teichoic acids (TAs) mediated by the dlt operon gene products might be a druggable target to overcome β-lactam-resistance of MRSA. Methods MICs and bactericidal effects of several β-lactam antibiotics were monitored in a panel of clinical MRSA strains with genetic or chemically induced deficiency in d-alanylation of TAs. Efficiency of the chemical inhibitor to rescue MRSA-infected larvae of Galleria mellonella as well as its ability to prevent or eradicate biofilms of S. aureus were analysed. Results Genetic inactivation of the Dlt system or its chemical inhibition re-sensitizes MRSA to β-lactams. Among the 13 strains, the most pronounced effect was obtained using the inhibitor with imipenem, reducing the median MIC from 16 to 0.25 mg/L. This combination was also bactericidal in some strains and significantly protected G. mellonella larvae from lethal MRSA infections. Finally, inactivation of d-alanylation potentiated the effect of imipenem on inhibition and/or eradication of biofilm. Conclusions Our combined results show that highly efficient inhibitors of d-alanylation of TAs targeting enzymes of the Dlt system should be promising therapeutic adjuvants, especially in combination with carbapenems, for restoring the therapeutic efficacy of this class of antibiotics against MRSA.
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Affiliation(s)
| | | | - Axel Hartke
- Normandie Univ, UNICAEN, U2RM, 14000 Caen, France
| | | | - Thierry Lequeux
- Normandie Université, Laboratoire de Chimie Moléculaire et Thioorganique UMR 6507, ENSICAEN, UNICAEN, CNRS, 6 Bd. du Maréchal Juin, 14050 Caen, France
| | - Emmanuel Pfund
- Normandie Université, Laboratoire de Chimie Moléculaire et Thioorganique UMR 6507, ENSICAEN, UNICAEN, CNRS, 6 Bd. du Maréchal Juin, 14050 Caen, France
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Kang HK, Park J, Seo CH, Park Y. PEP27-2, a Potent Antimicrobial Cell-Penetrating Peptide, Reduces Skin Abscess Formation during Staphylococcus aureus Infections in Mouse When Used in Combination with Antibiotics. ACS Infect Dis 2021; 7:2620-2636. [PMID: 34251811 DOI: 10.1021/acsinfecdis.0c00894] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PEP27, a 27-amino acid (aa) peptide secreted by Streptococcus pneumoniae, is an autolytic peptide that functions as a major virulence factor. To develop a clinically applicable antimicrobial peptide (AMP), we designed PEP27 analogs with Trp substitutions to enhance its antimicrobial activity compared to that of PEP27. Particularly, PEP27-2 showed strong antimicrobial activity against a wide variety of bacteria, including multidrug-resistant (MDR) bacteria. It was found that the antimicrobial activity of PEP27-2 was increased by substituting Trp for the aa at the middle position of PEP27. We found that PEP27-2 acts as an effective cell-penetrating peptide in bacterial and mammalian cells. Here, we proved that subcutaneous infection with MDR Staphylococcus aureus induced skin lesions such as skeletal muscle damage, deep inflammation, and necrosis of the overlaying dermis in mice. Combination treatment with antibiotics revealed synergistic effects, remarkably reducing abscess size and improving the bacteria removal rate from the infection site. Moreover, PEP27-2-antibiotic combination treatment reduced inflammation, lowering levels of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), IL-6, inducible NO synthase (iNOS), and cyclooxygenase (COX-2) in skin abscess tissue. The results suggest that the PEP27-2 peptide is a promising therapeutic option for combating MDR bacterial strains by enhancing antibiotic penetration and protecting against MDR bacteria.
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Affiliation(s)
- Hee Kyoung Kang
- Department of Biomedical Science, Chosun University, Gwangju 61452, Korea
| | - Jonggwan Park
- Department of Bioinformatics, Kongju National University, Kongju 32588, Korea
| | - Chang Ho Seo
- Department of Bioinformatics, Kongju National University, Kongju 32588, Korea
| | - Yoonkyung Park
- Department of Biomedical Science, Chosun University, Gwangju 61452, Korea
- Research Center for Proteineous Materials (RCPM), Chosun University, Gwangju 61452, Korea
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Synergistic Antibacterial Effects of Meropenem in Combination with Aminoglycosides against Carbapenem-Resistant Escherichia coli Harboring blaNDM-1 and blaNDM-5. Antibiotics (Basel) 2021; 10:antibiotics10081023. [PMID: 34439073 PMCID: PMC8388987 DOI: 10.3390/antibiotics10081023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/12/2021] [Accepted: 08/18/2021] [Indexed: 12/21/2022] Open
Abstract
Infections due to carbapenem-resistant Escherichia coli (CREC) are problematic due to limitation in treatment options. Combination therapies of existing antimicrobial agents have become a reliable strategy to control these infections. In this study, the synergistic effects of meropenem in combination with aminoglycosides were assessed by checkerboard and time-kill assays. Of the 35 isolates, 19 isolates (54.3%) were resistant to carbapenems (imipenem and meropenem) with the MIC ranges from 16 to 128 µg/mL. These isolates were resistant to almost all antibiotic classes. Molecular characteristics revealed co-harboring of carbapenemase (blaNDM-1, blaNDM-5 and blaOXA-48) and extended-spectrum β-lactamases (ESBL) genes (blaCTX-M, blaSHV and blaTEM). The checkerboard assay displayed synergistic effects of meropenem and several aminoglycosides against most CREC isolates. Time-kill assays further demonstrated strong synergistic effects of meropenem in combination with either amikacin, gentamicin, kanamycin, streptomycin, and tobramycin. The results suggested that meropenem in combination with aminoglycoside therapy might be an efficient optional treatment for infections cause by CREC.
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Enhanced Antibacterial Efficiency of Cellulosic Fibers: Microencapsulation and Green Grafting Strategies. COATINGS 2021. [DOI: 10.3390/coatings11080980] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We report an analysis of chemical components of essential oils from barks of Ceylon cinnamon and cloves of Syzygium aromaticum and an investigation of their antibacterial activity. The components of oils were determined by using Gas Chromatography/Mass Spectrometry (GC-MS) analysis, and the antimicrobial activity was assessed by the disk diffusion test. The synergic effect of essential oils mixture (cinnamon oil and clove oil) was evaluated. Antimicrobial properties were conferred to cellulosic fibers through microencapsulation using citric acid as a green binding agent. Essential oil mixture was encapsulated by coacervation using chitosan as a wall material and sodium hydroxide as a hardening agent. The diameter of the produced microcapsules varies between 12 and 48 μm. Attachment of the produced microcapsules onto cotton fabrics surface was confirmed by Attenuated Total Reflectance-Fourier Transformed Infrared (ATR-FTIR) spectroscopy, optical microscopy and Scanning Electron Microscopy (SEM) analysis. The results show that microcapsules were successfully attached on cotton fabric surfaces, imparting antibacterial activity without significantly affecting their properties. The finished cotton fabrics exhibited good mechanical properties and wettability.
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Enhanced Antibacterial Activity of Repurposed Mitomycin C and Imipenem in Combination with the Lytic Phage vB_KpnM-VAC13 against Clinical Isolates of Klebsiella pneumoniae. Antimicrob Agents Chemother 2021; 65:e0090021. [PMID: 34228538 DOI: 10.1128/aac.00900-21] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Klebsiella pneumoniae is an opportunistic Gram-negative pathogen that employs different strategies (resistance and persistence) to counteract antibiotic treatments. This study aimed to search for new means of combatting imipenem-resistant and persister strains of K. pneumoniae by repurposing the anticancer drug mitomycin C as an antimicrobial agent and by combining the drug and the conventional antibiotic imipenem with the lytic phage vB_KpnM-VAC13. Several clinical K. pneumoniae isolates were characterized, and an imipenem-resistant isolate (harboring OXA-245 β-lactamase) and a persister isolate were selected for study. The mitomycin C and imipenem MICs for both isolates were determined by the broth microdilution method. Time-kill curve data were obtained by optical density at 600 nm (OD600) measurement and CFU enumeration in the presence of each drug alone and with the phage. The frequency of occurrence of mutants resistant to each drug and the combinations was also calculated, and the efficacy of the combination treatments was evaluated using an in vivo infection model (Galleria mellonella). The lytic phage vB_KpnM-VAC13 and mitomycin C had synergistic effects on imipenem-resistant and persister isolates, both in vitro and in vivo. The phage-imipenem combination successfully killed the persisters but not the imipenem-resistant isolate harboring OXA-245 β-lactamase. Interestingly, the combinations decreased the emergence of in vitro resistant mutants of both isolates. Combinations of the lytic phage vB_KpnM-VAC13 with mitomycin C and imipenem were effective against the persister K. pneumoniae isolate. The lytic phage-mitomycin C combination was also effective against imipenem-resistant K. pneumoniae strains harboring OXA-245 β-lactamase.
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