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Vadakkan K, Sathishkumar K, Kuttiyachan Urumbil S, Ponnenkunnathu Govindankutty S, Kumar Ngangbam A, Devi Nongmaithem B. A review of chemical signaling mechanisms underlying quorum sensing and its inhibition in Staphylococcus aureus. Bioorg Chem 2024; 148:107465. [PMID: 38761705 DOI: 10.1016/j.bioorg.2024.107465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Revised: 04/29/2024] [Accepted: 05/14/2024] [Indexed: 05/20/2024]
Abstract
Staphylococcus aureus is a significant bacterium responsible for multiple infections and is a primary cause of fatalities among patients in hospital environments. The advent of pathogenic bacteria such as methicillin-resistant S. aureus revealed the shortcomings of employing antibiotics to treat bacterial infectious diseases. Quorum sensing enhances S. aureus's survivability through signaling processes. Targeting the key components of quorum sensing has drawn much interest nowadays as a promising strategy for combating infections caused by bacteria. Concentrating on the accessory gene regulator quorum-sensing mechanism is the most commonly suggested anti-virulence approach for S.aureus. Quorum quenching is a common strategy for controlling illnesses triggered by microorganisms since it reduces the pathogenicity of bacteria and improves bacterial biofilm susceptibility to antibiotics, thus providing an intriguing prospect for drug discovery. Quorum sensing inhibition reduces selective stresses and constrains the emergence of antibiotic resistance while limiting bacterial pathogenicity. This review examines the quorum sensing mechanisms involved in S. aureus, quorum sensing targets and gene regulation, environmental factors affecting quorum sensing, quorum sensing inhibition, natural products as quorum sensing inhibitory agents and novel therapeutical strategies to target quorum sensing in S. aureus as drug developing technique to augment conventional antibiotic approaches.
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Affiliation(s)
- Kayeen Vadakkan
- Department of Biotechnology, St. Mary's College (Autonomous), Thrissur, Kerala 680020, India; Manipur International University, Imphal, Manipur 795140, India.
| | - Kuppusamy Sathishkumar
- Center for Global Health Research, Saveetha Medical College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Thandalam, Chennai, Tamil Nadu 602105, India
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Li H, Li C, Shi C, Sameeh MY, Al-Asmari F, Cui H, Lin L. Transcriptome analysis reveals the inhibitory mechanism of phloretin on virulence expression of Staphylococcus aureus and its application in cooked chicken. Int J Food Microbiol 2024; 415:110647. [PMID: 38422678 DOI: 10.1016/j.ijfoodmicro.2024.110647] [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: 09/04/2023] [Revised: 02/10/2024] [Accepted: 02/26/2024] [Indexed: 03/02/2024]
Abstract
Staphylococcus aureus (S. aureus) enterotoxins have aroused great concern to food safety owing to its increased risk of food poisoning. The current research aimed to investigate the anti-virulence mechanisms of phloretin against S. aureus in terms of toxin activity and gene expression. The results indicated that phloretin could effectively inhibit the production of hemolysins and enterotoxins, and its anti-virulence effect was exerted in a concentration-dependent manner. Transcriptome results indicated that phloretin could downregulate the transcription level of majority virulence factors related genes (68 %) of S. aureus, including the quorum sensing-related genes (agrB, agrC, agrA, sspA, splF, splD and others) and bacterial secretion system-related genes (secDF, secY2, and yidC). In addition, it was speculated that phloretin was most likely to bind to the AgrA DNA binding domain, thereby affecting the expression of downstream virulence genes (hla, seb, spa, rot, geh, etc) based on molecular docking. Finally, the application in cooked chicken indicated that phloretin could effectively decrease the content of enterotoxins and improve the storage quality of cooked chicken. These findings not only evidenced the feasible anti-virulence activity of phloretin, but also provided a new strategy to prevent S. aureus food poisoning in cooked meat preservation.
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Affiliation(s)
- Hong Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Changzhu Li
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410007, China
| | - Ce Shi
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Manal Y Sameeh
- Department of Chemistry, Al-Leith University College, Umm Al Qura University, Makkah 25100, Saudi Arabia
| | - Fahad Al-Asmari
- Department of Food and Nutrition Sciences, College of Agricultural and Food Sciences, King Faisal University, Al Ahsa 31982, Saudi Arabia
| | - Haiying Cui
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Lin Lin
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410007, China.
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Li H, Li C, Shi C, Alharbi M, Cui H, Lin L. Phosphoproteomics analysis reveals the anti-bacterial and anti-virulence mechanism of eugenol against Staphylococcus aureus and its application in meat products. Int J Food Microbiol 2024; 414:110621. [PMID: 38341904 DOI: 10.1016/j.ijfoodmicro.2024.110621] [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: 10/05/2023] [Revised: 01/22/2024] [Accepted: 02/07/2024] [Indexed: 02/13/2024]
Abstract
The increasing risk of food poisoning caused by Staphylococcus aureus (S. aureus) contamination has aroused great concern about food safety. Eugenol is highly favored due to its broad-spectrum antibacterial activity and non-drug resistance property. The study aimed to reveal the anti-bacterial and anti-virulence mechanisms of eugenol against S. aureus using phosphoproteomics. The results indicated that eugenol could inhibit the phosphorylation levels of enzyme I in the bacterial phosphotransferase system (PTS). Meanwhile, it could also inhibit the phosphorylation levels of key enzymes in bacterial carbon metabolism (such as glucose-6-phosphate isomerase of glycolysis and succinyl-CoA synthetase of tricarboxylic acid cycle), thereby decreasing the content of ATP and accelerating bacterial death. In addition, eugenol could inhibit the phosphorylation of AgrA in the quorum sensing system, thereby inhibiting the expression of agr operons (agrA and agrC) and downstream virulence genes (RNAIII, hla and seb). Finally, the application on beef indicated that eugenol could effectively decrease the content of enterotoxins and improve its storage quality. These findings provide a new way for eugenol to prevent S. aureus contamination and food poisoning in meat products.
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Affiliation(s)
- Hong Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Changzhu Li
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410007, China
| | - Ce Shi
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Metab Alharbi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Haiying Cui
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Lin Lin
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410007, China.
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Lyagin I, Stepanov N, Presnov D, Trifonov A, Efremenko E. Self-Assembling Enzymatic Nanocomplexes with Polypeptides and Low-Weight Organic Compounds: Preparation, Characterization, and Application of New Antibacterials. Int J Mol Sci 2023; 24:ijms24031831. [PMID: 36768158 PMCID: PMC9915939 DOI: 10.3390/ijms24031831] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/12/2023] [Accepted: 01/15/2023] [Indexed: 01/18/2023] Open
Abstract
The self-assembling of nanosized materials is a promising field for research and development. Multiple approaches are applied to obtain inorganic, organic and composite nanomaterials with different functionality. In the present work, self-assembling nanocomplexes (NCs) were prepared on the basis of enzymes and polypeptides followed by the investigation of the influence of low-molecular weight biologically active compounds on the properties of the NCs. For that, the initially possible formation of catalytically active self-assembling NCs of four hydrolytic enzymes with nine effectors was screened via molecular modeling. It allowed the selection of two enzymes (hexahistidine-tagged organophosphorus hydrolase and penicillin acylase) and two compounds (emodin and naringenin) having biological activity. Further, such NCs based on surface-modified enzymes were characterized by a batch of physical and biochemical methods. At least three NCs containing emodin and enzyme (His6-OPH and/or penicillin acylase) have been shown to significantly improve the antibacterial activity of colistin and, to a lesser extent, polymyxin B towards both Gram-positive bacteria (Bacillus subtilis) and Gram-negative bacteria (Escherichia coli).
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Affiliation(s)
- Ilya Lyagin
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Nikolay Stepanov
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Denis Presnov
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Artem Trifonov
- Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Elena Efremenko
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
- Correspondence: ; Tel.: +7-495-939-3170; Fax: +7-495-939-5417
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Characterization and evaluation of antibacterial and wound healing activity of naringenin-loaded polyethylene glycol/polycaprolactone electrospun nanofibers. J Drug Deliv Sci Technol 2023. [DOI: 10.1016/j.jddst.2023.104182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Zhang W, Ran J, Shang L, Zhang L, Wang M, Fei C, Chen C, Gu F, Liu Y. Niclosamide as a repurposing drug against Gram-positive bacterial infections. J Antimicrob Chemother 2022; 77:3312-3320. [PMID: 36173387 DOI: 10.1093/jac/dkac319] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 08/30/2022] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES Niclosamide is commonly used as an antiparasitic drug in veterinary clinics. The objectives of this study were to evaluate the efficacy of niclosamide against resistant Gram-positive bacteria in vitro and in an in vivo experimental model of topical bacterial infection. Moreover, to study the antibacterial mechanism of niclosamide to Staphylococcus aureus. METHODS A mouse topical infection model was established to detect the antibacterial activity of niclosamide in vivo. The antimicrobial mechanism was probed by visualizing the bacterial morphologies using scanning electron microscopy and transmission electron microscopy. Moreover, the haemolytic assay and western blotting analysis were performed to evaluate whether niclosamide could inhibit the secretion of alpha-haemolysin (α-HL) from S. aureus. RESULTS The MICs of niclosamide were below 0.5 mg/L for Gram-positive bacteria, showing excellent antibacterial activity in vitro. The in vivo antibacterial activity results indicated that niclosamide treatment at 10 mg/kg of body weight caused a significant reduction in the abscess area and the number of S. aureus cells. Moreover, the antibacterial mechanism of niclosamide showed that the surface morphology of S. aureus displayed noticeable shrinkage, with an increasing number of small vacuole-like structures observed as the drug concentration increased. Intracellular ATP levels were found to decrease in a niclosamide dose-dependent manner. Haemolysis and western blotting analyses revealed that niclosamide inhibited the haemolytic activity of S. aureus by inhibiting α-HL expression under subinhibitory concentration conditions. CONCLUSIONS Niclosamide has significant potential for development into drugs that prevent and treat diseases caused by Gram-positive bacteria such as Staphylococcus and Streptococcus.
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Affiliation(s)
- Wei Zhang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China.,Key Laboratory of Veterinary Chemical Drugs and Pharmaceutics, Ministry of Agriculture and Rural Affairs, Shanghai 200241, China
| | - Jinxin Ran
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China.,Key Laboratory of Veterinary Chemical Drugs and Pharmaceutics, Ministry of Agriculture and Rural Affairs, Shanghai 200241, China
| | - Lu Shang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China.,Key Laboratory of Veterinary Chemical Drugs and Pharmaceutics, Ministry of Agriculture and Rural Affairs, Shanghai 200241, China
| | - Lifang Zhang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China.,Key Laboratory of Veterinary Chemical Drugs and Pharmaceutics, Ministry of Agriculture and Rural Affairs, Shanghai 200241, China
| | - Mi Wang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China.,Key Laboratory of Veterinary Chemical Drugs and Pharmaceutics, Ministry of Agriculture and Rural Affairs, Shanghai 200241, China
| | - Chenzhong Fei
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China.,Key Laboratory of Veterinary Chemical Drugs and Pharmaceutics, Ministry of Agriculture and Rural Affairs, Shanghai 200241, China
| | - Chan Chen
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China.,Key Laboratory of Veterinary Chemical Drugs and Pharmaceutics, Ministry of Agriculture and Rural Affairs, Shanghai 200241, China
| | - Feng Gu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China.,Key Laboratory of Veterinary Chemical Drugs and Pharmaceutics, Ministry of Agriculture and Rural Affairs, Shanghai 200241, China
| | - Yingchun Liu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China.,Key Laboratory of Veterinary Chemical Drugs and Pharmaceutics, Ministry of Agriculture and Rural Affairs, Shanghai 200241, China
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Duda-Madej A, Stecko J, Sobieraj J, Szymańska N, Kozłowska J. Naringenin and Its Derivatives-Health-Promoting Phytobiotic against Resistant Bacteria and Fungi in Humans. Antibiotics (Basel) 2022; 11:1628. [PMID: 36421272 PMCID: PMC9686724 DOI: 10.3390/antibiotics11111628] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/09/2022] [Accepted: 11/13/2022] [Indexed: 07/30/2023] Open
Abstract
Naringenin is a trihydroxyflavanone present in large amount in different citrus fruits, e.g., oranges, pomelos, grapefruits, but also in tomatoes, fenugreek and coffee. It has a wide range of pharmacological and biological effects beneficial to human health. Its antioxidant, anti-cancer, anti-inflammatory, antifungal and antimicrobial activity is frequently reported in scientific literature. In this review we presented the current state of knowledge on the antimicrobial activity of naringenin and its natural and synthetic derivatives as a phytobiotic against resistant Gram-positive and Gram-negative bacteria as well as fungi in humans. Most of the data reported here have been obtained from in vitro or in vivo studies. Over the past few years, due to the overuse of antibiotics, the occurrence of bacteria resistant to all available antibiotics has been growing. Therefore, the main focus here is on antibiotic resistant strains, which are a significant, worldwide problem in the treatment of infectious diseases. The situation is so alarming that the WHO has listed microbial resistance to drugs on the list of the 10 most important health problems facing humanity. In addition, based on scientific reports from recent years, we described the potential molecular mechanism of action of these bioflavonoids against pathogenic strains of microorganisms. As plant-derived substances have been pushed out of use with the beginning of the antibiotic era, we hope that this review will contribute to their return as alternative methods of preventing and treating infections in the epoch of drug resistance.
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Affiliation(s)
- Anna Duda-Madej
- Department of Microbiology, Faculty of Medicine, Wroclaw Medical University, Chałubińskiego 4, 50-368 Wrocław, Poland
| | - Jakub Stecko
- Faculty of Medicine, Wroclaw Medical University, Ludwika Pasteura 1, 50-367 Wrocław, Poland
| | - Jakub Sobieraj
- Faculty of Medicine, Wroclaw Medical University, Ludwika Pasteura 1, 50-367 Wrocław, Poland
| | - Natalia Szymańska
- Faculty of Medicine, Wroclaw Medical University, Ludwika Pasteura 1, 50-367 Wrocław, Poland
| | - Joanna Kozłowska
- Department of Food Chemistry and Biocatalysis, Faculty of Biotechnology and Food Science, Wrocław University of Environmental and Life Sciences, C.K. Norwida 25, 50-375 Wrocław, Poland
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Singh S, Sharma A, Monga V, Bhatia R. Compendium of naringenin: potential sources, analytical aspects, chemistry, nutraceutical potentials and pharmacological profile. Crit Rev Food Sci Nutr 2022; 63:8868-8899. [PMID: 35357240 DOI: 10.1080/10408398.2022.2056726] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Naringenin is flavorless, water insoluble active principle belonging to flavanone subclass. It exhibits a diverse pharmacological profile as well as divine nutraceutical values. Although several researchers have explored this phytoconstituent to evaluate its promising properties, still it has not gained recognition at therapeutic levels and more clinical investigations are still required. Also the neutraceutical potential has limited marketed formulations. This compilation includes the description of reported therapeutic potentials of naringenin in variety of pathological conditions alongwith the underlying mechanisms. Details of various analytical investigations carried on this molecule have been provided along with brief description of chemistry and structural activity relationship. In the end, various patents filed and clinical trial data has been provided. Naringenin has revealed promising pharmacological activities including cardiovascular diseases, neuroprotection, anti-diabetic, anticancer, antimicrobial, antiviral, antioxidant, anti-inflammatory and anti-platelet activity. It has been marketed in the form of nanoformulations, co-crystals, solid dispersions, tablets, capsules and inclusion complexes. It is also available in various herbal formulations as nutraceutical supplement. There are some pharmacokinetic issue with naringenin like poor absorption and low dissolution rate. Although these issues have been sorted out upto certain extent still further research to investigate the bioavailability of naringenin from herbal supplements and its clinical efficacy is essential.
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Affiliation(s)
- Sukhwinder Singh
- Department of Pharmaceutical Chemistry & Analysis, ISF College of Pharmacy, Moga, Punjab, India
| | - Alok Sharma
- Department of Pharmacognosy, ISF College of Pharmacy, Moga, Punjab, India
| | - Vikramdeep Monga
- Department of Pharmaceutical Chemistry & Analysis, ISF College of Pharmacy, Moga, Punjab, India
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda, India
| | - Rohit Bhatia
- Department of Pharmaceutical Chemistry & Analysis, ISF College of Pharmacy, Moga, Punjab, India
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Gupta G, Almalki WH, Kazmi I, Fuloria NK, Fuloria S, Subramaniyan V, Sekar M, Singh SK, Chellappan DK, Dua K. Current update on the protective effect of naringin in inflammatory lung diseases. EXCLI JOURNAL 2022; 21:573-579. [PMID: 35721579 PMCID: PMC9203983 DOI: 10.17179/excli2022-4752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 02/22/2022] [Indexed: 11/18/2022]
Affiliation(s)
- Gaurav Gupta
- School of Pharmacy, Suresh Gyan Vihar University, Jagatpura 302017, Mahal Road, Jaipur, India,Department of Pharmacology, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India,*To whom correspondence should be addressed: Gaurav Gupta, School of Pharmacy, Suresh Gyan Vihar University, Jagatpura 302017, Mahal Road, Jaipur, India, E-mail:
| | - Waleed Hassan Almalki
- Department of Pharmacology, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Imran Kazmi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | | | - Shivkanya Fuloria
- Faculty of Pharmacy, AIMST University, Bedong 08100, Kedah, Malaysia
| | - Vetriselvan Subramaniyan
- Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jalan SP 2, Bandar Saujana Putra, 42610 Jenjarom Selangor, Malaysia
| | - Mahendran Sekar
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Health Sciences, Royal College of Medicine Perak, Universiti Kuala Lumpur, Ipoh 30450, Perak, Malaysia
| | - Sachin Kumar Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, 144411, India,Faculty of Health, Australian Research Center in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Dinesh Kumar Chellappan
- Department of Life Sciences, School of Pharmacy, International Medical University, Kuala Lumpur, 57000, Malaysia
| | - Kamal Dua
- Faculty of Health, Australian Research Center in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, NSW, 2007, Australia,Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, NSW 2007, Australia
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de Oliveira DM, de Oliveira DBC, Nunes YRF, de Almeida Alves TM, Kohlhoff M, Andrade AA, Cota BB. Natural Occurring Phenolic Derivatives from Mauritia flexuosa (Buriti) Stems and Their Potential Antibacterial Activity against Methicillin-Resistant Staphylococcus aureus (MRSA). Chem Biodivers 2022; 19:e202100788. [PMID: 35146890 DOI: 10.1002/cbdv.202100788] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 01/13/2022] [Indexed: 11/12/2022]
Abstract
Mauritia flexuosa Linnaeus filius (buriti or aguage; Arecaceae) is a palm used by traditional medicine in Brazil to treat dysentery and diarrhea. Our group showed that the soluble dichloromethane (CH2 Cl2 ) fraction from EtOH extract from M. flexuosa stems inhibited the growth of methicillin-susceptible Staphylococcus aureus (MSSA) and methicillin-resistant S. aureus (MRSA) and it is rich in phenolic compounds. This study aimed to isolate new phenolic compounds from CH2 Cl2 fraction from M. flexuosa stems with in vitro antibacterial activity. The crude CH2 Cl2 fraction was fractionated by gel permeation chromatography (GPC) followed by semi-preparative RP-HPLC. The antibacterial activity was evaluated using the broth microdilution method against MSSA (ATCC 29213) and MRSA (clinical isolate 155). All compounds were also tested against Gram-negative (Escherichia coli; ATCC 35218) bacteria and two fungi species (Candida albicans; ATCC 14053 and Trichophyton rubrum; ATCC MYA 4438). The chemical structures of isolated compounds were determined by analysis and comparison with literature data of their NMR and HRMS spectra and optical activity. The chemical investigation yielded seven aromatic compounds, of which four, (2S,15S)-2,15-dimethyl-2,15-dioxa-1,8(1,4)-dibenzenacyclotetradecaphane (1), (2S,5S)-1-(4-hydroxyphenyl)hexane-2,5-diol (3), bruguierol E (4), and buritin (5) were previously unreported and three are known compounds identified as 6-(4'-hydroxyphenyl) hexan-2-one (2), (+)-(2R,3R)-dihydrokaempferol (6), and (+)-(2R)-naringenin (7). Compounds 1 and 7 showed antibacterial activity against MRSA and MSSA with minimum inhibitory concentrations (MICs) of between 62.5 and 31.3 μg/mL, respectively. Our preliminary findings support that CH2 Cl2 fraction from buriti, a typical species of flooded areas of Brazilian savanna, and its aromatic phenolic compounds are active against MSSA and MRSA contributing with understanding about the traditional use of this species.
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Affiliation(s)
- Djalma Menezes de Oliveira
- Department of Science and Technology, State University of Bahia Southwest, José Moreira Sobrinho Avenue, 45206-191, Jequié, Bahia, Brazil
| | - Diego Batista Carneiro de Oliveira
- Laboratory of Microbiology, Federal University of Triângulo Mineiro, Pça Manoel Terra, 330, Abadia, 38025-015, Uberaba, Minas Gerais, Brazil
| | - Yule Roberta Ferreira Nunes
- Ecology Laboratory and Plant Propagation, Department of General Biology, Estadual University of Montes Claros, University Campus Prof. Darcy Ribeiro, 39401-089, Montes Claros, Minas Gerais, Brazil
| | - Tânia Maria de Almeida Alves
- Laboratory of Chemistry Bioactive Natural Products, René Rachou Institute, Oswaldo Cruz Foundation, Augusto de Lima Avenue, 1715, Barro Preto, 30190-002, Belo Horizonte, Minas Gerais, Brazil
| | - Markus Kohlhoff
- Laboratory of Chemistry Bioactive Natural Products, René Rachou Institute, Oswaldo Cruz Foundation, Augusto de Lima Avenue, 1715, Barro Preto, 30190-002, Belo Horizonte, Minas Gerais, Brazil
| | - Anderson Assunção Andrade
- Laboratory of Microbiology, Federal University of Triângulo Mineiro, Pça Manoel Terra, 330, Abadia, 38025-015, Uberaba, Minas Gerais, Brazil
| | - Betania Barros Cota
- Laboratory of Chemistry Bioactive Natural Products, René Rachou Institute, Oswaldo Cruz Foundation, Augusto de Lima Avenue, 1715, Barro Preto, 30190-002, Belo Horizonte, Minas Gerais, Brazil
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Thymus zygis Essential Oil: Phytochemical Characterization, Bioactivity Evaluation and Synergistic Effect with Antibiotics against Staphylococcus aureus. Antibiotics (Basel) 2022; 11:antibiotics11020146. [PMID: 35203749 PMCID: PMC8868214 DOI: 10.3390/antibiotics11020146] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/16/2022] [Accepted: 01/20/2022] [Indexed: 12/17/2022] Open
Abstract
Staphylococcus aureus is a nosocomial bacterium causing different infectious diseases, ranging from skin and soft-tissue infections to more serious and life-threatening infections such as sepsis, meningitis and endocarditis, which may be exacerbated by antibiotic resistance. Plant products may be seen as an alternative as antibacterial agents, namely, against S. aureus. Thus, the aim of this work was to characterize the chemical composition and evaluate the bioactive properties of the T. zygis essential oil (EO), with a focus on antimicrobial activity against S. aureus. Gas chromatography coupled with mass spectrometry was used to assess the chemical composition of the T. zygis EO, and the antioxidant activity was evaluated using the DPPH method and β-carotene-bleaching assay. The antimicrobial activity against S. aureus strains, the interaction with different antibiotics and the attenuation of this bacterium’s virulence were evaluated. The T. zygis EO showed antioxidant activity acting through two different mechanisms and antibacterial activity against S. aureus, with antibiofilm and antihaemolytic properties. This EO also demonstrated synergistic or additive interactions in combination with ampicillin, ciprofloxacin or vancomycin against S. aureus strains and, in some cases, changed the antibiotic-resistance phenotype from resistant to susceptible. Therefore, the present work demonstrates the good bioactive properties of the EO of T. zygis, mainly the antimicrobial activity against S. aureus, revealing its potential to be used as an antibacterial agent.
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Khan UM, Sameen A, Aadil RM, Shahid M, Sezen S, Zarrabi A, Ozdemir B, Sevindik M, Kaplan DN, Selamoglu Z, Ydyrys A, Anitha T, Kumar M, Sharifi-Rad J, Butnariu M. Citrus Genus and Its Waste Utilization: A Review on Health-Promoting Activities and Industrial Application. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2021; 2021:2488804. [PMID: 34795782 PMCID: PMC8595006 DOI: 10.1155/2021/2488804] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/15/2021] [Accepted: 09/28/2021] [Indexed: 11/18/2022]
Abstract
Citrus fruits such as oranges, grapefruits, lemons, limes, tangerines, and mandarins, whose production is increasing every year with the rise of consumer demand, are among the most popular fruits cultivated throughout the globe. Citrus genus belongs to the Rutaceae family and is known for its beneficial effects on health for centuries. These plant groups contain many beneficial nutrients and bioactive compounds. These compounds have antimicrobial, anticancer, antidiabetic, antiplatelet aggregation, and anti-inflammatory activities. Citrus waste, generated by citrus-processing industries in large amounts every year, has an important economic value due to richness of bioactive compounds. The present review paper has summarized the application and properties of Citrus and its waste in some fields such as food and drinks, traditional medicine practices, and recent advances in modern approaches towards pharmaceutical and nutraceutical formulations.
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Affiliation(s)
- Usman Mir Khan
- National Institute of Food Science and Technology, University of Agriculture, Faisalabad 38000, Pakistan
| | - Aysha Sameen
- National Institute of Food Science and Technology, University of Agriculture, Faisalabad 38000, Pakistan
| | - Rana Muhammad Aadil
- National Institute of Food Science and Technology, University of Agriculture, Faisalabad 38000, Pakistan
| | - Muhammad Shahid
- Department of Biochemistry, Faculty of Sciences, University of Agriculture, Faisalabad 38000, Pakistan
| | - Serap Sezen
- Faculty of Engineering and Natural Science, Sabanci University, Tuzla, Istanbul 34956, Turkey
- Sabanci University Nanotechnology Research and Application Center (SUNUM), Tuzla, Istanbul 34956, Turkey
| | - Ali Zarrabi
- Sabanci University Nanotechnology Research and Application Center (SUNUM), Tuzla, Istanbul 34956, Turkey
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Istinye University, Istanbul, Turkey
| | - Betul Ozdemir
- Department of Cardiology, Faculty of Medicine, Nigde Ömer Halisdemir University, Nigde, Turkey
| | - Mustafa Sevindik
- Bahçe Vocational High School, Osmaniye Korkut Ata University, Osmaniye 80500, Turkey
| | - Dilara Nur Kaplan
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Karabuk University, Karabuk 78050, Turkey
| | - Zeliha Selamoglu
- Department of Medical Biology, Faculty of Medicine, Nigde Ömer Halisdemir University, Nigde 51240, Turkey
| | - Alibek Ydyrys
- Biomedical Research Centre, Al-Farabi Kazakh National University, Al-Farabi Av. 71, Almaty 050040, Kazakhstan
| | - T. Anitha
- Department of Postharvest Technology, Horticultural College and Research Institute, Periyakulam 625604, Tamil Nadu, India
| | - Manoj Kumar
- Chemical and Biochemical Processing Division, ICAR–Central Institute for Research on Cotton Technology, Mumbai 400019, India
| | - Javad Sharifi-Rad
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Monica Butnariu
- Banat's University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania” from Timisoara, Timisoara, Romania
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13
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Zhou W, Dong M, Wu H, Li HL, Xie JL, Ma RY, Su WW, Dai JY. Common mechanism of Citrus Grandis Exocarpium in treatment of chronic obstructive pulmonary disease and lung cancer. CHINESE HERBAL MEDICINES 2021; 13:525-533. [PMID: 36119362 PMCID: PMC9476385 DOI: 10.1016/j.chmed.2021.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 02/07/2021] [Accepted: 06/07/2021] [Indexed: 11/28/2022] Open
Abstract
Objective “Same treatment for different diseases” is a unique treatment strategy in traditional Chinese medicine. Two kinds of malignant respiratory diseases endanger human health-chronic obstructive pulmonary disease (COPD) and lung cancer. Citrus Grandis Exocarpium (Huajuhong in Chinese, HJH), a famous herbal, is always applied by Chinese medicine practitioners to dispersion the lung to resolve phlegm based on “syndrome differentiation and treatment” theory. However, the common mechanism for HJH’s treatment of COPD and lung cancer is not clear. Methods In this study, based on network pharmacology and molecular docking technology, the common mechanism of HJH in the treatment of COPD and lung cancer was studied. The active ingredients and related targets of HJH were integrated from TCMSP, BATMAN-TAM, STP, and Pubchem databases. The standard names of these targets were united by UniProt database. Targets of COPD and lung cancer were enriched through GeneCards, NCBI (Gene), Therapeutic Target Database, and DisGeNET (v7.0) databases. Then the intersection targets of HJH and diseases were obtained. The STRING network and the Cytoscape 3.7.2 were used to construct PPI network, the DAVID database was used to perform GO and KEGG analysis. Then Cytoscape 3.6.1 was used to build “ingredient-target-signal pathway” network. Finally, AutoDock 1.5.6 software was used to perform molecular docking of key proteins and molecules. Results Eleven active ingredients in HJH were obtained by searching the database, corresponding to 184 HJH-COPD-lung cancer targets intersection. The results of biological network analysis showed that naringenin, the active component in HJH, could mainly act on target proteins such as AKT1, EGFR. Then through positive regulation of vasoconstriction and other biological processes, naringenin could regulate estrogen signaling pathway, VEGF signaling pathway, HIF-1 signaling pathway, ErbB signaling pathway, PI3K-Akt signaling pathway to play an important role in the treatment of both COPD and lung cancer. Conclusion Network pharmacology was employed to systematically investigate the active ingredients and targets of HJH in treatment of COPD and lung cancer. And then, the common pharmacodynamic network of HJH for the two malignant respiratory diseases was firstly described. Furthermore, naringenin was proved to strongly bind with AKT1 and EGFR. It may provide the scientific basis for understanding the “Same treatment for different diseases” strategy in traditional Chinese medicine and inspirit subsequent drug discovery for COPD, lung cancer and other malignant lung diseases.
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Affiliation(s)
- Wei Zhou
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Min Dong
- Department of Pulmonology, Gansu Provincial Hospital of Traditional Chinese Medicine, Lanzhou 730000, China
| | - Hao Wu
- Guangdong Engineering and Technology Research Center for Quality and Efficacy Re-evaluation of Post-marketed TCM, Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Hui-lin Li
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Jia-le Xie
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Ru-yun Ma
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Wei-wei Su
- Guangdong Engineering and Technology Research Center for Quality and Efficacy Re-evaluation of Post-marketed TCM, Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
- Corresponding authors.
| | - Jian-ye Dai
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
- Corresponding authors.
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14
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Ahmad-Mansour N, Loubet P, Pouget C, Dunyach-Remy C, Sotto A, Lavigne JP, Molle V. Staphylococcus aureus Toxins: An Update on Their Pathogenic Properties and Potential Treatments. Toxins (Basel) 2021; 13:677. [PMID: 34678970 PMCID: PMC8540901 DOI: 10.3390/toxins13100677] [Citation(s) in RCA: 95] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 09/18/2021] [Accepted: 09/21/2021] [Indexed: 01/12/2023] Open
Abstract
Staphylococcus aureus is a clinically important pathogen that causes a wide range of human infections, from minor skin infections to severe tissue infection and sepsis. S. aureus has a high level of antibiotic resistance and is a common cause of infections in hospitals and the community. The rising prevalence of community-acquired methicillin-resistant S. aureus (CA-MRSA), combined with the important severity of S. aureus infections in general, has resulted in the frequent use of anti-staphylococcal antibiotics, leading to increasing resistance rates. Antibiotic-resistant S. aureus continues to be a major health concern, necessitating the development of novel therapeutic strategies. S. aureus uses a wide range of virulence factors, such as toxins, to develop an infection in the host. Recently, anti-virulence treatments that directly or indirectly neutralize S. aureus toxins have showed promise. In this review, we provide an update on toxin pathogenic characteristics, as well as anti-toxin therapeutical strategies.
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Affiliation(s)
- Nour Ahmad-Mansour
- Laboratory of Pathogen Host Interactions, CNRS UMR5235, Université de Montpellier, 34000 Montpellier, France;
| | - Paul Loubet
- Virulence Bactérienne et Infections Chroniques, INSERM U1047, Department of Infectious and Tropical Diseases, Université de Montpellier, 30908 Nîmes, France; (P.L.); (A.S.)
| | - Cassandra Pouget
- Virulence Bactérienne et Infections Chroniques, INSERM U1047, Université de Montpellier, 30908 Nîmes, France;
| | - Catherine Dunyach-Remy
- Virulence Bactérienne et Infections Chroniques, INSERM U1047, Department of Microbiology and Hospital Hygiene, Université de Montpellier, 30908 Nîmes, France; (C.D.-R.); (J.-P.L.)
| | - Albert Sotto
- Virulence Bactérienne et Infections Chroniques, INSERM U1047, Department of Infectious and Tropical Diseases, Université de Montpellier, 30908 Nîmes, France; (P.L.); (A.S.)
| | - Jean-Philippe Lavigne
- Virulence Bactérienne et Infections Chroniques, INSERM U1047, Department of Microbiology and Hospital Hygiene, Université de Montpellier, 30908 Nîmes, France; (C.D.-R.); (J.-P.L.)
| | - Virginie Molle
- Laboratory of Pathogen Host Interactions, CNRS UMR5235, Université de Montpellier, 34000 Montpellier, France;
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15
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Diphenyl pyrimidine exhibits protective effect on Staphylococcus aureus pneumonia in rat model by targeting NLRP3 expression. Microb Pathog 2021; 161:105168. [PMID: 34478857 DOI: 10.1016/j.micpath.2021.105168] [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: 07/03/2021] [Revised: 08/29/2021] [Accepted: 08/29/2021] [Indexed: 12/27/2022]
Abstract
Pneumonia is one of the most frequent disorder induced by S. aureus infection and accounts for 13.3% of the all the infections caused by staphylococcus. In the present study effect of diphenyl pyrimidine was investigated against Staphylococcus aureus (S. aureus) induced pneumonia in the rat model. The results demonstrated that diphenyl pyrimidine treatment of the rats effectively prevented S. aureus induced increase in mortality in dose-dependent manner. Diphenyl pyrimidine treatment inhibited histopathological changes in S. aureus infected rat lungs. Treatment of the rats with 1.25, 2.5, 5 and 10 mg/kg doses of diphenyl pyrimidine significantly (P < 0.05) reversed S. aureus infection induced increase in interleukin (IL)-1β, IL-18 and tumor necrosis factor (TNF)-α levels. Treatment with 1.25, 2.5, 5 and 10 mg/kg doses of diphenyl pyrimidine significantly (P < 0.05) reversed S. aureus infection induced increase nucleotide-binding domain and leucine-rich repeat containing (NLR) protein (NLRP3), apoptosis-associated speck-like protein containing a C-terminal caspase recruitment domain (ASC) and caspase-1 protein expression in rat lungs in dose-dependent manner. The NLRP3, ASC and caspase-1 mRNA level in S. aureus infected rat pulmonary tissues was significantly (P < 0.05) reduced by diphenyl pyrimidine treatment in dose-dependent manner. Thus, diphenyl pyrimidine protects S. aureus-induced pneumonia through suppression of NLRP3 and inflammatory cytokine expression. Therefore, diphenyl pyrimidine can be of therapeutic importance for the treatment of S. aureus induced pneumonia.
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16
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Wu Y, Zhao Z, Zhang H, Wang X, Tian XF, Wang Y, Qiu ZJ, Tang ZY, Huang M, Zhao Z. Isoxanthanol alleviates Staphylococcus aureus induced chronic obstructive pulmonary disease in rat model through promotion of miR-145-5p expression. Microb Pathog 2021; 155:104880. [PMID: 33905870 DOI: 10.1016/j.micpath.2021.104880] [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: 01/29/2021] [Revised: 03/11/2021] [Accepted: 03/23/2021] [Indexed: 11/28/2022]
Abstract
The present study was aimed to evaluate the isoxanthanol against Staphylococcus aureus chronic obstructive pulmonary disease (COPD) in rat model. The isoxanthanol decreased the parasitic load by almost 99% in the Staphylococcus aureus infected rats. It significantly (P < 0.05) decreased mortality rate of the rats, prevented pulmonary tissue damage and aggregation of inflammatory cytokines. In Staphylococcus aureus infected rats, isoxanthanol treatment inhibited production of interleukin-18, interleukin-1β and TNF-α significantly (P < 0.05) in the BALF and pulmonary tissues. Treatment of the Staphylococcus aureus-infected rats with isoxanthanol inhibited up-regulation of NLRP3, ASC and caspase-1 expression. In Staphylococcus aureus-infected rats the expression of miR-145-5p was remarkably increased on treatment with isoxanthanol. In summary, isoxanthanol prevents Staphylococcus aureus-induced COPD in rats through up-regulation of miR-145-5p and suppression of inflammatory cytokines. Therefore, isoxanthanol can be of therapeutic importance for the treatment of Staphylococcus aureus induced COPD.
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Affiliation(s)
- Yihong Wu
- Department of General Practice, Pingjiang Xincheng Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China
| | - Zongquan Zhao
- Department of General Practice, Pingjiang New Town Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China
| | - Hao Zhang
- Department of General Practice, Pingjiang New Town Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China
| | - Xiaohong Wang
- Department of General Practice, Pingjiang New Town Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China
| | - Xiang Fan Tian
- Department of General Practice, Pingjiang New Town Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China
| | - Yijing Wang
- Community Health Management Center, Suzhou Municipal Hospital, Suzhou, 215000, China
| | - Zhen Juan Qiu
- Department of Nursing, Pingjiang New Town Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China
| | - Zhen Yuan Tang
- Community Health Management Center, Suzhou Municipal Hospital, Suzhou, 215000, China
| | - Min Huang
- Department of General Practice, Suzhou Municipal Hospital, Suzhou, 215000, China.
| | - Zongquan Zhao
- Department of General Practice, Pingjiang New Town Community Health Service Center, Sujin Street, Gusu District, Suzhou, 215000, China.
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17
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Potential role of probiotics in reducing Clostridioides difficile virulence: Interference with quorum sensing systems. Microb Pathog 2021; 153:104798. [PMID: 33609647 DOI: 10.1016/j.micpath.2021.104798] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 02/05/2021] [Accepted: 02/08/2021] [Indexed: 12/23/2022]
Abstract
Opportunistic pathogenic bacteria may cause disease after the normally protective microbiome is disrupted (typically by antibiotic exposure). Clostridioides difficile is one such pathogen having a severe impact on healthcare facilities and increasing costs of medical care. The search for new therapeutic strategies that are not reliant on additional antibiotic exposures are currently being explored. One such strategy is to disrupt the production of C. difficile virulence factors by interfering with quorum sensing (QS) systems. QS has been well studied in other bacteria, but our understanding in C. difficile is not so well understood. Some probiotic strains or combinations of strains have been shown to be effective in the treatment or primary prevention of C. difficile infections and may possess multiple mechanisms of action. One mechanism of probiotics might be the inhibition of QS, but their role has not been clearly defined yet. A literature search was conducted using standard databases (PubMed, Google Scholar) from database inception to August 2020. The objective of this paper is to update our understanding of how QS leads to toxin production by C. difficile, which is important in pathogenesis, and how QS inhibitors or probiotics may disrupt this pathway. We found two main QS systems for C. difficile (Agr and Lux systems) that are involved in C. difficile pathogenesis by regulating toxin production, motility and adherence. Probiotics and other QS inhibitors targeting QS systems may represent important new directions of therapy and prevention of CDI.
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18
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Mourenza Á, Gil JA, Mateos LM, Letek M. Novel Treatments and Preventative Strategies Against Food-Poisoning Caused by Staphylococcal Species. Pathogens 2021; 10:91. [PMID: 33498299 PMCID: PMC7909252 DOI: 10.3390/pathogens10020091] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/14/2021] [Accepted: 01/16/2021] [Indexed: 12/19/2022] Open
Abstract
Staphylococcal infections are a widespread cause of disease in humans. In particular, S. aureus is a major causative agent of infection in clinical medicine. In addition, these bacteria can produce a high number of staphylococcal enterotoxins (SE) that may cause food intoxications. Apart from S. aureus, many coagulase-negative Staphylococcus spp. could be the source of food contamination. Thus, there is an active research work focused on developing novel preventative interventions based on food supplements to reduce the impact of staphylococcal food poisoning. Interestingly, many plant-derived compounds, such as polyphenols, flavonoids, or terpenoids, show significant antimicrobial activity against staphylococci, and therefore these compounds could be crucial to reduce the incidence of food intoxication in humans. Here, we reviewed the most promising strategies developed to prevent staphylococcal food poisoning.
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Affiliation(s)
- Álvaro Mourenza
- Departamento de Biología Molecular, Área de Microbiología, Universidad de León, 24071 León, Spain; (Á.M.); (J.A.G.)
| | - José A. Gil
- Departamento de Biología Molecular, Área de Microbiología, Universidad de León, 24071 León, Spain; (Á.M.); (J.A.G.)
- Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain
| | - Luis M. Mateos
- Departamento de Biología Molecular, Área de Microbiología, Universidad de León, 24071 León, Spain; (Á.M.); (J.A.G.)
- Instituto de Biología Molecular, Genómica y Proteómica (INBIOMIC), Universidad de León, 24071 León, Spain
| | - Michal Letek
- Departamento de Biología Molecular, Área de Microbiología, Universidad de León, 24071 León, Spain; (Á.M.); (J.A.G.)
- Instituto de Desarrollo Ganadero y Sanidad Animal (INDEGSAL), Universidad de León, 24071 León, Spain
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19
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Evaluation of Naringenin as a Promising Treatment Option for COPD Based on Literature Review and Network Pharmacology. Biomolecules 2020; 10:biom10121644. [PMID: 33302350 PMCID: PMC7762561 DOI: 10.3390/biom10121644] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 12/01/2020] [Accepted: 12/03/2020] [Indexed: 12/14/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a chronic respiratory disease characterized by incompletely reversible airflow limitation and seriously threatens the health of humans due to its high morbidity and mortality. Naringenin, as a natural flavanone, has shown various potential pharmacological activities against multiple pathological stages of COPD, but available studies are scattered and unsystematic. Thus, we combined literature review with network pharmacology analysis to evaluate the potential therapeutic effects of naringenin on COPD and predict its underlying mechanisms, expecting to provide a promising tactic for clinical treatment of COPD.
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20
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Lather A, Sharma S, Khatkar A. Naringenin derivatives as glucosamine-6-phosphate synthase inhibitors: synthesis, antioxidants, antimicrobial, preservative efficacy, molecular docking and in silico ADMET analysis. BMC Chem 2020; 14:41. [PMID: 32577624 PMCID: PMC7305605 DOI: 10.1186/s13065-020-00693-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 06/11/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Preservatives have to be added in food, pharmaceuticals and cosmetics products to maintain their shelf life. However, the existing chemical based preservatives have been associated with severe side effects that compel the researchers to find better safe preservatives based on natural products. G-6-P synthase is an important enzyme for bacterial and fungal cell wall synthesis and offers as a potential target to find better G-6-P synthase inhibitors based antimicrobial compounds. Naringenin, a flavanone, has been reported for a wide range of pharmacological activities including antimicrobial activity, which makes it a potential candidate to be explored as novel G-6-P synthase inhibitor. RESULTS The synthesis of naringenin derivatives with potent G-6-P synthase inhibitor having remarkable antioxidant, antimicrobial and preservative efficacy was performed. Among the synthesized compounds, the compound 1 possessed good antioxidant activity (IC50 value, 6.864 ± 0.020 µM) as compared to standard ascorbic acid (IC50 value, 8.110 ± 0.069 µM). The antimicrobial activity of synthesized compounds revealed compound 1 as the most potent compound (pMIC 1.79, 1.79, 1.49, 1.49, 1.49 and 1.49 μM/mL for P. mirabilis, P. aeruginosa, S. aureus, E. coli, C. albicans and A. niger respectively) as compared to standard drugs taken. The compound 2 showed comparable activity against P. mirabilis (pMIC 1.14 μM/mL), C. albicans (pMIC 1.14 μM/mL) while the compound 3 also showed comparable activity against C. albicans (pMIC 1.16 μM/mL) as well A. niger (pMIC 1.46 μM/mL), likewise the compound 4 showed comparable activity against P. mirabilis (pMIC 1.18 μM/mL) as compared to the standard drugs streptomycin (pMIC 1.06, 1.36, 1.06 and 1.96 μM/mL for P. mirabilis, P. aeruginosa, S. aureus and E. coli respectively), ciprofloxacin (pMIC 1.12, 1.42, 1.12 and 1.42 μM/mL for P. mirabilis, P. aeruginosa, S. aureus and E. coli respectively), ampicillin (pMIC 1.14, 0.84, 0.84 and 1.74 μM/mL for P. mirabilis, P. aeruginosa, S. aureus and E. coli respectively) and fluconazole (pMIC 1.08 and 1.38 μM/mL for C. albicans and A. niger respectively). The molecular docking with the target G-6-P synthase pdb id 1moq resulted with an better dock score for compound 1 (- 7.42) as compared to standard antimicrobial drugs, ciprofloxacin (- 5.185), ampicillin (- 5.065) and fluconazole (- 5.129) that supported the wet lab results. The preservative efficacy test for compound 1 in White Lotion USP showed the log CFU/mL value within the prescribed limit and results were comparable to standard sodium benzoate, ethyl paraben and propyl paraben as per USP standard protocol. CONCLUSIONS The synthesized naringenin derivatives exhibited significant G-6-P synthase inhibitory potential with good selectivity towards the selected target G-6-P synthase. Compound 1, bearing nitro group showed good antioxidant, antimicrobial and preservative efficacy compared with the standard drugs taken. The mechanistic insight about the compounds within the active site was completed by molecular docking that supported the results for novel synthesized G-6-P synthase inhibitors.
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Affiliation(s)
- Amit Lather
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, Haryana India
| | - Sunil Sharma
- Department of Pharmaceutical Sciences, G.J.U.S.&T., Hisar, India
| | - Anurag Khatkar
- Laboratory for Preservation Technology and Enzyme Inhibition Studies, Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, Haryana India
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21
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Álvarez-Martínez FJ, Barrajón-Catalán E, Encinar JA, Rodríguez-Díaz JC, Micol V. Antimicrobial Capacity of Plant Polyphenols against Gram-positive Bacteria: A Comprehensive Review. Curr Med Chem 2020; 27:2576-2606. [PMID: 30295182 DOI: 10.2174/0929867325666181008115650] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 07/17/2018] [Accepted: 07/31/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Multi-drug-resistant bacteria such as Methicillin-Resistant Staphylococcus aureus (MRSA) disseminate rapidly amongst patients in healthcare facilities and suppose an increasingly important cause of community-associated infections and associated mortality. The development of effective therapeutic options against resistant bacteria is a public health priority. Plant polyphenols are structurally diverse compounds that have been used for centuries for medicinal purposes, including infections treatment and possess, not only antimicrobial activity, but also antioxidant, anti-inflammatory and anticancer activities among others. Based on the existing evidence on the polyphenols' antibacterial capacity, polyphenols may be postulated as an alternative or complementary therapy for infectious diseases. OBJECTIVE To review the antimicrobial activity of plant polyphenols against Gram-positive bacteria, especially against S. aureus and its resistant strains. Determine the main bacterial molecular targets of polyphenols and their potential mechanism of action. METHODOLOGY The most relevant reports on plant polyphenols' antibacterial activity and their putative molecular targets were studied. We also performed virtual screening of thousand different polyphenols against proteins involved in the peptidoglycan biosynthesis to find potential valuable bioactive compounds. The bibliographic information used in this review was obtained from MEDLINE via PubMed. RESULTS Several polyphenols: phenolic acids, flavonoids (especially flavonols), tannins, lignans, stilbenes and combinations of these in botanical mixtures, have exhibited significant antibacterial activity against resistant and non-resistant Gram-positive bacteria at low μg/mL range MIC values. Their mechanism of action is quite diverse, targeting cell wall, lipid membrane, membrane receptors and ion channels, bacteria metabolites and biofilm formation. Synergic effects were also demonstrated for some combinations of polyphenols and antibiotics. CONCLUSION Plant polyphenols mean a promising source of antibacterial agents, either alone or in combination with existing antibiotics, for the development of new antibiotic therapies.
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Affiliation(s)
- Francisco Javier Álvarez-Martínez
- Instituto de Biologia Molecular y Celular (IBMC) and Instituto de Investigacion, Desarrollo e Innovacion en Biotecnología Sanitaria de Elche (IDiBE), Universitas Miguel Hernandez; 03202 Elche, Spain
| | - Enrique Barrajón-Catalán
- Instituto de Biologia Molecular y Celular (IBMC) and Instituto de Investigacion, Desarrollo e Innovacion en Biotecnología Sanitaria de Elche (IDiBE), Universitas Miguel Hernandez; 03202 Elche, Spain
| | - José Antonio Encinar
- Instituto de Biologia Molecular y Celular (IBMC) and Instituto de Investigacion, Desarrollo e Innovacion en Biotecnología Sanitaria de Elche (IDiBE), Universitas Miguel Hernandez; 03202 Elche, Spain
| | - Juan Carlos Rodríguez-Díaz
- Microbiology Section, University General Hospital of Alicante, Alicante Institute for Health and Biomedical Research (ISABIAL-FISABIO Foundation), Alicante 03010, Spain
| | - Vicente Micol
- Instituto de Biologia Molecular y Celular (IBMC) and Instituto de Investigacion, Desarrollo e Innovacion en Biotecnología Sanitaria de Elche (IDiBE), Universitas Miguel Hernandez; 03202 Elche, Spain.,CIBER, Fisiopatología de la Obesidad y la Nutrición, CIBERobn, Instituto de Salud Carlos III (CB12/03/30038), Spain
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22
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Horswill AR, Gordon CP. Structure-Activity Relationship Studies of Small Molecule Modulators of the Staphylococcal Accessory Gene Regulator. J Med Chem 2019; 63:2705-2730. [PMID: 31658413 DOI: 10.1021/acs.jmedchem.9b00798] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The accessory gene regulator (agr) quorum-sensing system is arguably the most important regulator of Staphylococcus virulence. The agr-system serves a crucial role in pathogenesis by triggering substantive gene expression alterations to up-regulate the production of a wide variety of virulence determinants such as exoenzymes (proteases, lipases, nucleases) and downregulate the expression of surface binding proteins. Accordingly, the agr-system represents a compelling target for the development of antivirulence therapeutics as potential adjuncts, or alternatives, to conventional bactericidal and bacteriostatic antibiotics. Despite this potential, to date, no agr-system inhibitors have progressed to the clinic; however, several promising lead compounds have been identified through screens of synthetic and natural product libraries. On the basis of the molecular components within the agr-system, the current contingent of regulating compounds can be clustered into three broad groups, AgrA-P3 activation inhibitors, AgrB-AgrD processing inhibitors, and AgrC-AIP interaction inhibitors. This review aims to provide an overview of the development, structure-activity-relationships, and limitations of compounds within each of these groups in addition to the current opportunities for developing next-generation anologs.
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Affiliation(s)
- Alexander R Horswill
- Veterans Affairs Eastern Colorado Health Care System, Aurora, Colorado 80045, United States.,Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045, United States
| | - Christopher P Gordon
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia.,Molecular Medicine Research Group, School of Medicine, Westerm Sydney University, Building 30, Campbelltown, NSW 2560, Australia
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23
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Intestinal cytotoxicity induced by Escherichia coli is fully prevented by red wine polyphenol extract: Mechanistic insights in epithelial cells. Chem Biol Interact 2019; 310:108711. [DOI: 10.1016/j.cbi.2019.06.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 05/08/2019] [Accepted: 06/11/2019] [Indexed: 12/14/2022]
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Xu Z, Li H, Qin X, Wang T, Hao J, Zhao J, Wang J, Wang R, Wang D, Wei S, Cai H, Zhao Y. Antibacterial evaluation of plants extracts against ampicillin-resistant Escherichia coli (E. coli) by microcalorimetry and principal component analysis. AMB Express 2019; 9:101. [PMID: 31297618 PMCID: PMC6624225 DOI: 10.1186/s13568-019-0829-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 07/01/2019] [Indexed: 11/28/2022] Open
Abstract
Antibiotics abuse has caused increased bacterial resistance, which severely limits the application of antibiotics to the treatment of bacterial infections. Therefore, it is urgent to develop new antibacterial drugs through other sources. Dracontomelon dao (Blanco) Merr. & Rolfe (Ren Mianzi in Chinese) is a traditional medicinal material derived from Anacardiaceae with a long history of treating various infectious diseases, such as decubitus and skin ulcers. Recent research has indicated that different extracts from the leaves of D. dao, especially the ethyl acetate (EtOAc) fraction containing flavonoids and phenolic acids, exhibit potent antibacterial activities. In this research, the combined anti-drug-resistant bacterial activities of these active ingredients were investigated. Six samples (S1-S6) were obtained from the EtOAc fraction of D. dao leaves. Microcalorimetric measurements and principal component analysis were performed on the in vitro samples. The results showed that all six samples had notable antibacterial activities. Specifically, sample S6 exhibited a prominent antibacterial effect, with an IC50 value of 84.3 μg mL-1, which was significantly lower than that of other samples. The relative contents of main flavonoids and phenolic acids in S6 sample were confirmed by UPLC/Q-TOF-MS. In conclusion, sample S6 from the EtOAc fraction of D. dao leaves could be used as a potential antimicrobial resource in the treatment of infectious diseases. This work provides an insight into the effect of traditional Chinese medicine on drug-resistant bacteria. Moreover, the purification and characterization of the chemical compounds from the sample S6 deserve further analysis.
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Affiliation(s)
- Zhuo Xu
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 China
- Department of Pharmacy, Fifth Medical Center, General Hospital of Chinese PLA, Beijing, 100039 China
| | - Haotian Li
- Department of Pharmacy, Fifth Medical Center, General Hospital of Chinese PLA, Beijing, 100039 China
| | - Xuhua Qin
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 China
| | - Tao Wang
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 China
- Department of Pharmacy, Fifth Medical Center, General Hospital of Chinese PLA, Beijing, 100039 China
| | - Junjie Hao
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 China
| | - Jianwei Zhao
- China Astronaut Research and Training Center, Beijing, 100094 China
| | - Jiabo Wang
- China Military Institute of Chinese Medicine, Fifth Medical Center, General Hospital of Chinese PLA, Beijing, 100039 China
| | - Ruilin Wang
- Integrative Medical Center, Fifth Medical Center, General Hospital of Chinese PLA, Beijing, 100039 China
| | - Dan Wang
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 China
- Department of Pharmacy, Fifth Medical Center, General Hospital of Chinese PLA, Beijing, 100039 China
| | - Shizhang Wei
- Department of Pharmacy, Fifth Medical Center, General Hospital of Chinese PLA, Beijing, 100039 China
| | - Huadan Cai
- Department of Pharmacy, Fifth Medical Center, General Hospital of Chinese PLA, Beijing, 100039 China
| | - Yanling Zhao
- Department of Pharmacy, Fifth Medical Center, General Hospital of Chinese PLA, Beijing, 100039 China
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Staphylococcus aureus Toxins: From Their Pathogenic Roles to Anti-virulence Therapy Using Natural Products. BIOTECHNOL BIOPROC E 2019. [DOI: 10.1007/s12257-019-0059-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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26
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Chen L, Zhang X, Peng X, Yang Y, Yu H. Baicalin tetrazole acts as anti-pneumocystis carinii pneumonia candidate in immunosuppressed rat model. Microb Pathog 2019; 132:59-65. [PMID: 31002962 DOI: 10.1016/j.micpath.2019.04.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 04/05/2019] [Accepted: 04/15/2019] [Indexed: 10/27/2022]
Abstract
The present study was aimed to synthesize and evaluate tetrazoles of baicalin against Pneumocystis carinii pneumonia in the rat model. Among the seven synthesized baicalin tetrazoles, one with trifloromethyl group in the aromatic ring was found to be most potent during the initial study. The mechanism of preventive effect of most potent compound 4c against Pneumocystis carinii pneumonia was investigated in detail. The compound 4c decreased the parasitic load by almost 99% in the rats. It significantly (P < 0.05) decreased mortality rate of the rats, prevented pulmonary tissue damage and aggregation of inflammatory cytokines. In Pneumocystis carinii infected rats compound 4c treatment inhibited production of interleukin-18, interleukin-1β and TNF-α significantly (P < 0.05) in the BALF and pulmonary tissues. Treatment of the pneumocystis carinii-infected rats with compound 4c inhibited up-regulation of mRNA expression corresponding NLRP3, ASC and caspase-1. The compound 4c treatment of the pneumocystis carinii-infected rats significantly (P < 0.02) suppressed the level of NLRP3 and ASC proteins. Moreover, the enhancement of caspase-1 activation by pneumocystis carinii-infection in rats was also suppressed by compound 4c. The results from present study demonstrate that compound 4c protects pneumocystis carinii induced pneumonia through suppression of inflammatory cytokines and NLRP3 activation. Therefore, compound 4c can be of therapeutic importance for the treatment of pneumocystis carinii induced pneumonia.
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Affiliation(s)
- Lin Chen
- Department of Respiratory and Critical Care Medicine, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China
| | - Xin Zhang
- Department of Laboratory Medicine, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China
| | - Xiaying Peng
- Department of Respiratory and Critical Care Medicine, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China
| | - Yang Yang
- Department of Respiratory and Critical Care Medicine, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China
| | - Hua Yu
- Department of Laboratory Medicine, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China.
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27
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Tang F, Li L, Meng XM, Li B, Wang CQ, Wang SQ, Wang TL, Tian YM. Inhibition of alpha-hemolysin expression by resveratrol attenuates Staphylococcus aureus virulence. Microb Pathog 2019; 127:85-90. [DOI: 10.1016/j.micpath.2018.11.027] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 11/19/2018] [Accepted: 11/19/2018] [Indexed: 12/24/2022]
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28
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Sonoda S, Yamaguchi T, Aoki K, Ono D, Sato A, Kajiwara C, Kimura S, Akasaka Y, Ishii Y, Miyazaki Y, Inase N, Tateda K. Evidence of latent molecular diversity determining the virulence of community-associated MRSA USA300 clones in mice. IMMUNITY INFLAMMATION AND DISEASE 2018; 6:402-412. [PMID: 30091216 PMCID: PMC6113770 DOI: 10.1002/iid3.234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 07/10/2018] [Accepted: 07/13/2018] [Indexed: 01/26/2023]
Abstract
Introduction The USA300 clone of community‐associated MRSA is reported to be hypervirulent and epidemic in the United States. This clone causes a variety of diseases from lethal pneumonia to mild skin infections. We hypothesized that evolutionary diversity may exist among USA300 clones, which may link virulence traits with host responses and mortality rates. Methods USA300 isolates from severe pneumonia (IP) and skin infection (IS) were characterized by pulsed‐field gel electrophoresis (PFGE) and next‐generation sequencing. Their virulence traits and host responses were compared in a lung infection model. Results The two USA300 isolates were found to be identical in genomic analysis. Robust IL‐6 production, aggregation of bacteria, and hemorrhaging were observed in IP‐infected lungs, which were associated with a higher rate of mortality than that observed with strain IS. Few neutrophils were detected in the lungs infected with strain IP, even at high bacterial loads. Massive production of α‐toxin and coagulase were evident during the early phase of IP infection, and robust gene expression of hla (α‐toxin) and lukS‐PV (Panton–Valentine leukocidin), but not coa, agrA, or rnaIII, was confirmed in vitro. Strain IP also induced strong hemolysis in red blood cells. Conclusions The present data demonstrated latent diversity in the virulence of USA300 clones. Unknown regulatory mechanisms, probably involving a host factor(s) as a trigger, may govern the virulence expression and resultant high mortality in certain sub‐clones of USA300.
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Affiliation(s)
- Shiro Sonoda
- The Integrated Pulmonology, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan.,Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Tetsuo Yamaguchi
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Kotaro Aoki
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Daisuke Ono
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Ayami Sato
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan.,Department of Surgery, Toho University Sakura Medical Center, Chiba, 285-8741, Japan
| | - Chiaki Kajiwara
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Soichiro Kimura
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Yoshikiyo Akasaka
- Department of Pathology, Toho University. Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
| | - Yasunari Miyazaki
- The Integrated Pulmonology, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan
| | - Naohiko Inase
- The Integrated Pulmonology, Tokyo Medical and Dental University, Tokyo, 113-8510, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Disease, Toho University, Faculty of Medicine, Tokyo, 143-8540, Japan
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Caleja C, Ribeiro A, Barreiro MF, Ferreira ICFR. Phenolic Compounds as Nutraceuticals or Functional Food Ingredients. Curr Pharm Des 2018; 23:2787-2806. [PMID: 28025943 DOI: 10.2174/1381612822666161227153906] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 12/24/2016] [Indexed: 12/12/2022]
Abstract
BACKGROUND Nowadays, the functional foods represent one the most promising, interesting and innovative areas in the food industry. Various components are being added to foods in order to render them functional. METHODS One example of these components are plant naturally occurring phenolic compounds, which are associated with a high antioxidant capacity and thus with benefits in relation to human health. RESULTS However, despite the huge number of scientific studies and patents on this topic and their natural presence in foods, namely in the ones from plant origin, there are still few marketable products enriched with these compounds. The commercialization of this type of functional products needs to go through various regulations, proving that they are safe and present the ascribed health benefits, conquering the target audience. In this review the growing interest of industry and consumers' appetence for functional foods and nutraceuticals is highlighted, focusing especially on phenolic compounds. CONCLUSION Although several published works show the multitude of bioactive properties of these compounds, ensuring their use as bioactive ingredients in food, they present inherent stability issues needing to be solved. However, considerable research is presently ongoing to overcome this problem, making viable the development of new products to be launched in the market.
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Affiliation(s)
- Cristina Caleja
- Mountain Research Centre (CIMO), ESA, Polytechnic Institute of Braganca, Braganca, Portugal
| | - Andreia Ribeiro
- Laboratory of Separation and Reaction Engineering (LSRE), Associate Laboratory LSRE/LCM, IPB, Braganca, Portugal
| | - Maria Filomena Barreiro
- Laboratory of Separation and Reaction Engineering (LSRE), Associate Laboratory LSRE/LCM, IPB, Braganca, Portugal
| | - Isabel C F R Ferreira
- Mountain Research Centre (CIMO), ESA, Polytechnic Institute of Braganca, Braganca, Portugal
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30
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Tan L, Li SR, Jiang B, Hu XM, Li S. Therapeutic Targeting of the Staphylococcus aureus Accessory Gene Regulator ( agr) System. Front Microbiol 2018; 9:55. [PMID: 29422887 PMCID: PMC5789755 DOI: 10.3389/fmicb.2018.00055] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 01/10/2018] [Indexed: 11/19/2022] Open
Abstract
Staphylococcus aureus can cause numerous different diseases, which has been attributed to its large repertoire of virulence factors, many of which are under the control of the accessory gene regulator (agr) quorum sensing system. Under conditions of high cell density, agr increases the production of many virulence factors, decreases expression of several colonization factors, and is intimately associated with the pathogenesis and biofilm formation of S. aureus. This review summarizes our current understanding of the molecular mechanisms underlying agr quorum sensing and the regulation of agr expression. The discussion also examines subgroups of agr and their association with different diseases, and concludes with an analysis of strategies for designing drugs and vaccines that target agr to combat S. aureus infections.
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Affiliation(s)
- Li Tan
- Department of Microbiology, College of Basic Medical Sciences, Third Military Medical University, Chongqing, China
| | - Si Rui Li
- Department of Microbiology, College of Basic Medical Sciences, Third Military Medical University, Chongqing, China
| | - Bei Jiang
- Department of Microbiology, College of Basic Medical Sciences, Third Military Medical University, Chongqing, China
| | - Xiao Mei Hu
- Department of Microbiology, College of Basic Medical Sciences, Third Military Medical University, Chongqing, China
| | - Shu Li
- Department of Microbiology, College of Basic Medical Sciences, Third Military Medical University, Chongqing, China
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Modification of membrane properties and fatty acids biosynthesis-related genes in Escherichia coli and Staphylococcus aureus: Implications for the antibacterial mechanism of naringenin. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1860:481-490. [PMID: 29138066 DOI: 10.1016/j.bbamem.2017.11.007] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 10/11/2017] [Accepted: 11/10/2017] [Indexed: 11/24/2022]
Abstract
In this work, modifications of cell membrane fluidity, fatty acid composition and fatty acid biosynthesis-associated genes of Escherichia coli ATCC 25922 (E. coli) and Staphylococcus aureus ATCC 6538 (S. aureus), during growth in the presence of naringenin (NAR), one of the natural antibacterial components in citrus plants, was investigated. Compared to E. coli, the growth of S. aureus was significantly inhibited by NAR in low concentrations. Combination of gas chromatography-mass spectrometry with fluorescence polarization analysis revealed that E. coli and S. aureus cells increased membrane fluidity by altering the composition of membrane fatty acids after exposure to NAR. For example, E. coli cells produced more unsaturated fatty acids (from 18.5% to 43.3%) at the expense of both cyclopropane and saturated fatty acids after growth in the concentrations of NAR from 0 to 2.20mM. For S. aureus grown with NAR at 0 to 1.47mM, the relative proportions of anteiso-branched chain fatty acids increased from 37.2% to 54.4%, whereas iso-branched and straight chain fatty acids decreased from 30.0% and 33.1% to 21.6% and 23.7%, respectively. Real time q-PCR analysis showed that NAR at higher concentrations induced a significant down-regulation of fatty acid biosynthesis-associated genes in the bacteria, with the exception of an increased expression of fabA gene. The minimum inhibitory concentration (MIC) of NAR against these two bacteria was determined, and both of bacteria underwent morphological changes after exposure to 1.0 and 2.0 MIC.
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32
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Wu S, Huang J. Resveratrol alleviates Staphylococcus aureus pneumonia by inhibition of the NLRP3 inflammasome. Exp Ther Med 2017; 14:6099-6104. [PMID: 29285164 DOI: 10.3892/etm.2017.5337] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 04/10/2017] [Indexed: 12/22/2022] Open
Abstract
Staphylococcus aureus (S. aureus) causes a wide variety of infections, including S. aureus pneumonia. Resveratrol, a natural polyphenolic compound contained in several plant species, exerts various activities, including anti-bacterial and pulmonary protective activities. The aim of the present study was to evaluate the protective effect of resveratrol on a murine model of S. aureus pneumonia and to elucidate the underlying mechanisms. It was found that resveratrol significantly reduced S. aureus-induced mortality, ameliorated lung injury and decreased cytokine levels in the bronchoalveolar lavage fluid and lung tissue of S. aureus infected-mice. In addition, reverse-transcription quantitative polymerase chain reaction and western blot assays showed that resveratrol markedly decreased the mRNA and protein expression of nucleotide-binding domain and leucine-rich repeat containing gene family pyrin domain containing 3 protein (NLRP3), apoptosis-associated speck-like protein containing a C-terminal caspase recruitment domain and caspase-1. These results demonstrated that resveratrol significantly alleviates S. aureus pneumonia in mice, the possible underlying mechanism of which is associated with the inhibition of the NLRP3 inflammasome. The present study suggested that resveratrol is a potentially useful agent for the treatment of S. aureus pneumonia and S. aureus-induced infectious diseases.
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Affiliation(s)
- Suxia Wu
- Department of Respiratory Medicine, Zhangjiagang City Jingfeng People's Hospital, Suzhou, Jiangsu 215625, P.R. China
| | - Jianan Huang
- Department of Respiratory Medicine, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
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Barreca D, Gattuso G, Bellocco E, Calderaro A, Trombetta D, Smeriglio A, Laganà G, Daglia M, Meneghini S, Nabavi SM. Flavanones: Citrus phytochemical with health-promoting properties. Biofactors 2017; 43:495-506. [PMID: 28497905 DOI: 10.1002/biof.1363] [Citation(s) in RCA: 198] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Revised: 03/27/2017] [Accepted: 03/31/2017] [Indexed: 12/26/2022]
Abstract
Citrus fruit and juices represent one of the main sources of compounds with a high potential for health promoting properties. Among these compounds, flavanones (such as hesperetin, naringenin, eriodictyol, isosakuranetin, and their respective glycosides), which occur in quantities ranging from ∼180 to 740 mg/L (depending on the Citrus species and cultivar) are responsible for many biological activities. These compounds support and enhance the body's defenses against oxidative stress and help the organism in the prevention of cardiovascular diseases, atherosclerosis, and cancer. Moreover, among other properties, they also show anti-inflammatory, antiviral, and antimicrobial activities. This review analyzes the biochemistry, pharmacology, and biology of Citrus flavanones, emphasizing the occurrence in Citrus fruits and juices and their bioavailability, structure-function correlations and ability to modulate signal cascades both in vitro and in vivo. © 2017 BioFactors, 43(4):495-506, 2017.
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Affiliation(s)
- Davide Barreca
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy
| | - Giuseppe Gattuso
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy
| | - Ersilia Bellocco
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy
| | - Antonella Calderaro
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy
| | - Domenico Trombetta
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy
| | - Antonella Smeriglio
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy
| | - Giuseppina Laganà
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy
| | - Maria Daglia
- Department of Drug Sciences, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia, Italy
| | - Silvia Meneghini
- Department of Drug Sciences, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia, Italy
| | - Seyed Mohammad Nabavi
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
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Shoham M, Greenberg M. Preventing the spread of infectious diseases: antivirulents versus antibiotics. Future Microbiol 2017; 12:365-368. [PMID: 28339290 DOI: 10.2217/fmb-2017-0011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Menachem Shoham
- Department of Biochemistry, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Michael Greenberg
- Department of Biochemistry, Case Western Reserve University, Cleveland, OH 44106, USA
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35
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Munguia J, Nizet V. Pharmacological Targeting of the Host-Pathogen Interaction: Alternatives to Classical Antibiotics to Combat Drug-Resistant Superbugs. Trends Pharmacol Sci 2017; 38:473-488. [PMID: 28283200 DOI: 10.1016/j.tips.2017.02.003] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Revised: 02/13/2017] [Accepted: 02/14/2017] [Indexed: 01/17/2023]
Abstract
The rise of multidrug-resistant pathogens and the dearth of new antibiotic development place an existential strain on successful infectious disease therapy. Breakthrough strategies that go beyond classical antibiotic mechanisms are needed to combat this looming public health catastrophe. Reconceptualizing antibiotic therapy in the richer context of the host-pathogen interaction is required for innovative solutions. By defining specific virulence factors, the essence of a pathogen, and pharmacologically neutralizing their activities, one can block disease progression and sensitize microbes to immune clearance. Likewise, host-directed strategies to boost phagocyte bactericidal activity, enhance leukocyte recruitment, or reverse pathogen-induced immunosuppression seek to replicate the success of cancer immunotherapy in the field of infectious diseases. The answer to the threat of multidrug-resistant pathogens lies 'outside the box' of current antibiotic paradigms.
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Affiliation(s)
- Jason Munguia
- Department of Pediatrics, Division of Host-Microbe Systems and Therapeutics, University of California San Diego, La Jolla, CA 92093, USA; Biomedical Sciences Graduate Program, University of California San Diego, La Jolla, CA 92093, USA
| | - Victor Nizet
- Department of Pediatrics, Division of Host-Microbe Systems and Therapeutics, University of California San Diego, La Jolla, CA 92093, USA; Biomedical Sciences Graduate Program, University of California San Diego, La Jolla, CA 92093, USA; Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA 92093, USA; Rady Children's Hospital, San Diego, CA 92123, USA.
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36
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Wang LH, Wang MS, Zeng XA, Xu XM, Brennan CS. Membrane and genomic DNA dual-targeting of citrus flavonoid naringenin against Staphylococcus aureus. Integr Biol (Camb) 2017; 9:820-829. [DOI: 10.1039/c7ib00095b] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Naringenin exerts its antibacterial action by disruption of the cytoplasmic membrane and DNA targeting effects inStaphylococcus aureus.
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Affiliation(s)
- Lang-Hong Wang
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
| | - Man-Sheng Wang
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- Institute of Bast Fiber Crops
| | - Xin-An Zeng
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
| | - Xi-Ming Xu
- Institute of Bioinformatics and Medical Engineering
- School of Electrical and Information Engineering
- Jiangsu University of Technology
- Changzhou 213000
- China
| | - Charles S. Brennan
- Department of Wine
- Food and Molecular Biosciences
- Lincoln University
- Canterbury
- New Zealand
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37
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Silva LN, Zimmer KR, Macedo AJ, Trentin DS. Plant Natural Products Targeting Bacterial Virulence Factors. Chem Rev 2016; 116:9162-236. [PMID: 27437994 DOI: 10.1021/acs.chemrev.6b00184] [Citation(s) in RCA: 263] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Decreased antimicrobial efficiency has become a global public health issue. The paucity of new antibacterial drugs is evident, and the arsenal against infectious diseases needs to be improved urgently. The selection of plants as a source of prototype compounds is appropriate, since plant species naturally produce a wide range of secondary metabolites that act as a chemical line of defense against microorganisms in the environment. Although traditional approaches to combat microbial infections remain effective, targeting microbial virulence rather than survival seems to be an exciting strategy, since the modulation of virulence factors might lead to a milder evolutionary pressure for the development of resistance. Additionally, anti-infective chemotherapies may be successfully achieved by combining antivirulence and conventional antimicrobials, extending the lifespan of these drugs. This review presents an updated discussion of natural compounds isolated from plants with chemically characterized structures and activity against the major bacterial virulence factors: quorum sensing, bacterial biofilms, bacterial motility, bacterial toxins, bacterial pigments, bacterial enzymes, and bacterial surfactants. Moreover, a critical analysis of the most promising virulence factors is presented, highlighting their potential as targets to attenuate bacterial virulence. The ongoing progress in the field of antivirulence therapy may therefore help to translate this promising concept into real intervention strategies in clinical areas.
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Affiliation(s)
- Laura Nunes Silva
- Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul , Porto Alegre, Rio Grande do Sul 90610-000, Brazil.,Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul , Porto Alegre, Rio Grande do Sul 91501-970, Brazil
| | - Karine Rigon Zimmer
- Departamento de Ciências Básicas da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre , Porto Alegre, Rio Grande do Sul 90050-170, Brazil
| | - Alexandre José Macedo
- Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul , Porto Alegre, Rio Grande do Sul 90610-000, Brazil.,Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul , Porto Alegre, Rio Grande do Sul 91501-970, Brazil.,Instituto Nacional do Semiárido , Campina Grande, Paraı́ba 58429-970, Brazil
| | - Danielle Silva Trentin
- Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul , Porto Alegre, Rio Grande do Sul 90610-000, Brazil.,Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul , Porto Alegre, Rio Grande do Sul 91501-970, Brazil
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Meng LM, Ma HJ, Guo H, Kong QQ, Zhang Y. The cardioprotective effect of naringenin against ischemia-reperfusion injury through activation of ATP-sensitive potassium channel in rat. Can J Physiol Pharmacol 2016; 94:973-8. [PMID: 27408985 DOI: 10.1139/cjpp-2016-0008] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Naringenin (Nari) has antioxidative and anti-atherosclerosis effects, and activation of ATP-sensitive potassium channel (KATP) can offer cardiac protection. We hypothesized that Nari protects the heart against ischemia-reperfusion (I-R) injury through activation of KATP. Isolated hearts from adult male Sprague-Dawley rats experienced a 30-min global ischemia followed by 60-min reperfusion (120 min for the infarct size determination). The hearts were treated with Nari (NARI); Nari plus glibenclamide (GLI), a non-specific ATP-sensitive potassium channel blocker (NARI+GLI); and Nari plus 5-hydroxy decanoic acid (5-HD), a mitochondrial membrane ATP-sensitive potassium channel blocker (NARI+5-HD). The left ventricular pressure, lactate dehydrogenates (LDH) in coronary effluent, superoxide dismutase (SOD) and malondialdehyde (MDA) in myocardium, and myocardial infarct area were measured. Nari above 2.5 μmol/L improved the recovery of left ventricular function, decreased LDH in coronary effluent, and reduced myocardial infarct area. The SOD activity was increased and MDA was decreased in Nari-treated myocardium. The cardioprotective effect of Nari was canceled by GLI and 5-HD. In conclusion, Nari has a cardioprotective effect against I-R injury, which may be carried out through activating ATP-sensitive potassium channels in both cell and mitochondrial membrane, and enhancing myocardial antioxidant capacity.
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Affiliation(s)
- Li-Min Meng
- a Department of Physiology, Hebei Medical University, Shijiazhuang 050017, PR China.,b Second Department of Cardiology, General Hospital of FengFeng Branch in Center Hebei Energy Sources Group, Handan 056200, PR China
| | - Hui-Jie Ma
- a Department of Physiology, Hebei Medical University, Shijiazhuang 050017, PR China.,d Hebei Collaborative Innovation Center for Cardio-cerebrovascular Disease, Shijiazhuang, Hebei 050000, PR China
| | - Hui Guo
- c Department of Gynaecology and Obstetrics, Fourth Hospital of Hebei Medical University, Shijiazhuang 050000, PR China
| | - Qian-Qian Kong
- a Department of Physiology, Hebei Medical University, Shijiazhuang 050017, PR China.,e Shandong Zaozhuang Vocational College of Technology, Tengzhou, Shandong 277500, PR China
| | - Yi Zhang
- a Department of Physiology, Hebei Medical University, Shijiazhuang 050017, PR China.,d Hebei Collaborative Innovation Center for Cardio-cerebrovascular Disease, Shijiazhuang, Hebei 050000, PR China
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Kong C, Neoh HM, Nathan S. Targeting Staphylococcus aureus Toxins: A Potential form of Anti-Virulence Therapy. Toxins (Basel) 2016; 8:toxins8030072. [PMID: 26999200 PMCID: PMC4810217 DOI: 10.3390/toxins8030072] [Citation(s) in RCA: 186] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 03/03/2016] [Accepted: 03/10/2016] [Indexed: 01/01/2023] Open
Abstract
Staphylococcus aureus is an opportunistic pathogen and the leading cause of a wide range of severe clinical infections. The range of diseases reflects the diversity of virulence factors produced by this pathogen. To establish an infection in the host, S. aureus expresses an inclusive set of virulence factors such as toxins, enzymes, adhesins, and other surface proteins that allow the pathogen to survive under extreme conditions and are essential for the bacteria’s ability to spread through tissues. Expression and secretion of this array of toxins and enzymes are tightly controlled by a number of regulatory systems. S. aureus is also notorious for its ability to resist the arsenal of currently available antibiotics and dissemination of various multidrug-resistant S. aureus clones limits therapeutic options for a S. aureus infection. Recently, the development of anti-virulence therapeutics that neutralize S. aureus toxins or block the pathways that regulate toxin production has shown potential in thwarting the bacteria’s acquisition of antibiotic resistance. In this review, we provide insights into the regulation of S. aureus toxin production and potential anti-virulence strategies that target S. aureus toxins.
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Affiliation(s)
- Cin Kong
- School of Biosciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan, Malaysia.
| | - Hui-min Neoh
- UKM Medical Molecular Biology Institute (UMBI), Universiti Kebangsaan Malaysia, 56000 Cheras, Kuala Lumpur, Malaysia.
| | - Sheila Nathan
- School of Biosciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan, Malaysia.
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Wang Q, Yang J, Zhang XM, Zhou L, Liao XL, Yang B. Practical Synthesis of Naringenin. JOURNAL OF CHEMICAL RESEARCH 2015. [DOI: 10.3184/174751915x14379994045537] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Two routes for the synthesis of the flavanone naringenin are described. In the first, 3,5-dimethoxyphenol is converted to 2-hydroxy-4,6-dimethoxyacetophenone and then by condensation with anisaldehyde to 2′-hydroxy-4,4′,6′-trimethoxychalcone. The chalcone is then cyclised with aqueous hydrochloric acid and demethylated with pyridine hydrochloride to form naringenin in 45% overall yield. The condensation of 2-hydroxy-4,6-dimethoxyacetophenone with anisaldehyde could also directly produce 4′,5,7-trimethoxyflavanone, which was then converted into naringenin in 60% overall yield. In the second route, a single step for the preparation of the chalcone is used in which 1,3,5-trimethoxybenzene is acylated with p-methoxycinnamic acid. Although the synthesis of naringenin is achieved in a lower overall yield of 29%, the process is simpler.
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Affiliation(s)
- Qian Wang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, 727 South Jingming Road, Chenggong District, Kunming, Yunnan Province 650500, P.R. China
| | - Jian Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, 727 South Jingming Road, Chenggong District, Kunming, Yunnan Province 650500, P.R. China
| | - Xiang-ming Zhang
- College of Pharmacy, Nankai University, 94 WeiJin Road, Nankai District, Tianjing 300071, P.R. China
- Tianjin International Joint Academy of Biomedicine, 220 Dongting Road, Tianjin economic and technological development zone, Tianjin 300457, P.R. China
| | - Lei Zhou
- College of Pharmacy, Nankai University, 94 WeiJin Road, Nankai District, Tianjing 300071, P.R. China
- Tianjin International Joint Academy of Biomedicine, 220 Dongting Road, Tianjin economic and technological development zone, Tianjin 300457, P.R. China
| | - Xia-li Liao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, 727 South Jingming Road, Chenggong District, Kunming, Yunnan Province 650500, P.R. China
| | - Bo Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, 727 South Jingming Road, Chenggong District, Kunming, Yunnan Province 650500, P.R. China
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Diosmetin inhibits the expression of alpha-hemolysin in Staphylococcus aureus. Antonie van Leeuwenhoek 2015; 108:383-9. [DOI: 10.1007/s10482-015-0491-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 05/21/2015] [Indexed: 11/26/2022]
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Wang J, Zhou X, Liu S, Li G, Shi L, Dong J, Li W, Deng X, Niu X. Morin hydrate attenuates Staphylococcus aureus virulence by inhibiting the self-assembly of α-hemolysin. J Appl Microbiol 2015; 118:753-63. [PMID: 25564958 DOI: 10.1111/jam.12743] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 12/17/2014] [Accepted: 12/23/2014] [Indexed: 11/26/2022]
Abstract
AIMS To investigate the mechanism by which morin hydrate inhibits the haemolytic activity of α-hemolysin (Hla), a channel-forming toxin that is important for the pathogenesis of disease in experimental animals, and its therapeutic effect against Staphylococcus aureus pneumonia in a mouse model. METHODS AND RESULTS The results from the in vitro (haemolysis, western blot and cytotoxicity assays) and in vivo (mouse model of intranasal lung infection) experiments indicated that morin hydrate, a natural compound with little anti-Staph. aureus activity, could effectively antagonize the cytolytic activity of Hla, alleviate human lung cell injury, and protect against mortality of Staph. aureus pneumonia in a mouse model of infection. Molecular dynamics simulations, free energy calculations and mutagenesis assays were further employed to determine the catalytic mechanism of inhibition, which indicated that a direct binding of morin to the 'Stem' domain of Hla (residues I107 and T109) and the concomitant change in conformation led to the inhibition of the self-assembly of the heptameric transmembrane pore, thus inhibiting the biological activity of Hla for cell lysis. CONCLUSIONS Morin inhibited Staph. aureus virulence via inhibiting the haemolytic activity of α-hemolysin. SIGNIFICANCE AND IMPACT OF THE STUDY These findings suggested that morin is a promising candidate for the development of anti-virulence therapeutic agents for the treatment of Staph. aureus infections.
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Affiliation(s)
- J Wang
- Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, China
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Tang F, Li WH, Zhou X, Liu YH, Li Z, Tang YS, Kou X, Wang SD, Bao M, Qu LD, Li M, Li B. Puerarin protects against Staphylococcus aureus-induced injury of human alveolar epithelial A549 cells via downregulating alpha-hemolysin secretion. Microb Drug Resist 2013; 20:357-63. [PMID: 24372183 DOI: 10.1089/mdr.2013.0104] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Alpha-hemolysin, a secreted pore-forming toxin, plays an indispensable role in the pathogenicity of Staphylococcus aureus. In this study, the antimicrobial activity of puerarin against S. aureus was investigated; as a result, puerarin showed no influence on the growth of this organism. However, hemolysis and western blotting assays showed that puerarin concentration dependently inhibited the secretion of alpha-hemolysin at low concentrations. Real-time RT-PCR assay was further employed to evaluate the transcriptional level of hla, the gene encoding alpha-hemolysin, and RNAIII, an effector molecule of the agr system. The results indicated that the RNAIII expression and subsequent hla transcription were also inhibited by puerarin in a dose-dependent manner. Furthermore, puerarin significantly prevented human alveolar epithelial A549 cells from S. aureus-induced injury. Thereby, puerarin may be considered as a potential candidate for the development of antivirulence drugs in the treatment of S. aureus-mediated infections.
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Affiliation(s)
- Feng Tang
- 1 College of Animal Husbandry and Veterinary, Liaoning Medical University , Jinzhou, China
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