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Lax NC, Parker SAJ, Hilton EJ, Seliman Y, Tidgewell KJ, Kolber BJ. Cyanobacterial extract with serotonin receptor subtype 7 (5-HT 7 R) affinity modulates depression and anxiety-like behavior in mice. Synapse 2018; 72:e22059. [PMID: 29992647 DOI: 10.1002/syn.22059] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 06/15/2018] [Accepted: 07/06/2018] [Indexed: 12/20/2022]
Abstract
Marine cyanobacteria represent a unique source in the field of drug discovery due to the secondary metabolites they produce and the structural similarity these compounds have to endogenous mammalian receptor ligands. A series of cyanobacteria were subjected to extraction, fractionation by column chromatography and screened for affinity against CNS targets with a focus on serotonin receptors (5-HTRs). Out of 276 fractions screened, 21% had activity at 5-HTRs and/or the 5-HT transporter (SERT). One sample, a cyanobacterium identified by 16S rRNA sequencing as Leptolyngbya from Las Perlas archipelago in Panama, contained a fraction with noted affinity for the 5-HT7 receptor (5-HT7 R). This fraction (DUQ0002I) was screened via intracerebroventricular (ICV) injections in mice using depression and anxiety assays including the forced swim, tail suspension, elevated zero maze, and light-dark preference tests. DUQ0002I decreased depression and anxiety-like behaviors in males and did not have effects in 5-HT7 R knockout or female mice. Administration of DUQ0002I to the CA1 of the hippocampus induced antidepression-like, but not anxiolytic-like behaviors. Testing of further purified materials showed no behavioral effects, leading us to hypothesize that the behavioral effects are likely caused by a synergistic effect between multiple compounds in the fraction. Finally, DUQ0002I was used in a model of neuropathic pain with comorbid depression (spared nerve injury-SNI). DUQ0002I had a similar antidepressant effect in animals with SNI, suggesting a role for the 5-HT7 R in the development of comorbid pain and depression. These results demonstrate the potential that cyanobacterial metabolites have in the field of neuropharmacognosy.
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Affiliation(s)
- Neil C Lax
- Department of Biological Sciences, Duquesne University, Pittsburgh, Pennsylvania.,Chronic Pain Research Consortium, Duquesne University, Pittsburgh, Pennsylvania
| | - Stacy-Ann J Parker
- Mylan School of Pharmacy, Duquesne University, Pittsburgh, Pennsylvania.,Chronic Pain Research Consortium, Duquesne University, Pittsburgh, Pennsylvania
| | - Edward J Hilton
- Department of Biological Sciences, Duquesne University, Pittsburgh, Pennsylvania.,Chronic Pain Research Consortium, Duquesne University, Pittsburgh, Pennsylvania
| | - Youstina Seliman
- Department of Biological Sciences, Duquesne University, Pittsburgh, Pennsylvania.,Chronic Pain Research Consortium, Duquesne University, Pittsburgh, Pennsylvania
| | - Kevin J Tidgewell
- Mylan School of Pharmacy, Duquesne University, Pittsburgh, Pennsylvania.,Chronic Pain Research Consortium, Duquesne University, Pittsburgh, Pennsylvania
| | - Benedict J Kolber
- Department of Biological Sciences, Duquesne University, Pittsburgh, Pennsylvania.,Chronic Pain Research Consortium, Duquesne University, Pittsburgh, Pennsylvania
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202
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Development of antituberculosis melt-blown polypropylene filters coated with mangosteen extracts for medical face mask applications. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2468-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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203
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Perumal S, Mahmud R, Mohamed N. Combination of Epicatechin 3-Gallate from Euphorbia hirta and Cefepime Promotes Potential Synergistic Eradication Action against Resistant Clinical Isolate of Pseudomonas aeruginosa. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2018; 2018:5713703. [PMID: 30108657 PMCID: PMC6077534 DOI: 10.1155/2018/5713703] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 07/02/2018] [Indexed: 11/17/2022]
Abstract
Pseudomonas aeruginosa is naturally resistant to many classes of antipseudomonal antibiotics due to the species ability to easily acquire resistance. Plant-based antibacterial agent in combination with the existing antibiotic proposes an alternative treatment regimen for the eradication of resistant bacterial infections. The antibacterial effects of the isolated epicatechin 3-gallate compound from Euphorbia hirta in combination with cefepime were investigated in vitro against resistant P. aeruginosa. The fractional inhibitory concentration index of the combination was determined using checkerboard broth microdilution method. Epicatechin 3-gallate combined with cefepime had produced synergistic effect against P. aeruginosa (with average FIC index of 0.24). The MIC of epicatechin 3-gallate was effectively reduced to MIC/4, MIC/8, MIC/16, and MIC/32 in the presence of cefepime. Time-kill study of epicatechin 3-gallate combined with cefepime exhibited remarkable bactericidal activity where the eradication of P. aeruginosa occurred within 4 h of treatment. Scanning electron micrographs revealed apparent cell membrane damage and leakage of cytoplasmic contents from P. aeruginosa cells which eventually led to the cell lysis after the combination treatment of epicatechin 3-gallate and cefepime. The potential of epicatechin 3-gallate to act synergistically with cefepime against clinically resistant P. aeruginosa strain possibly will maximize the successful outcomes when choosing empirical antibiotic treatment in hospitals or health care institutions.
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Affiliation(s)
- Shanmugapriya Perumal
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia
| | - Roziahanim Mahmud
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia
| | - Nornisah Mohamed
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia
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204
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Mouwakeh A, Telbisz Á, Spengler G, Mohácsi-Farkas C, Kiskó G. Antibacterial and Resistance Modifying Activities of Nigella sativa Essential Oil and its Active Compounds Against Listeria monocytogenes. In Vivo 2018; 32:737-743. [PMID: 29936453 PMCID: PMC6117775 DOI: 10.21873/invivo.11302] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 04/20/2018] [Accepted: 04/23/2018] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM N. sativa essential oil (EO) and its compounds (thymoquinone, carvacrol and p-cymene) have a broad antimicrobial spectrum. The aim of this study was to investigate the antimicrobial and resistance modifying activity of N. sativa EO, thymoquinone, carvacrol and p-cymene against Listeria monocytogenes. MATERIALS AND METHODS N. sativa EO, thymoquinone, carvacrol and p-cymene was assessed for its antimicrobial activity, modulation of antimicrobial resistance, inhibition of antimicrobial efflux and membrane integrity by broth microdilution, ethidium bromide accumulation and LIVE/DEAD BacLight™ assays. RESULTS L. monocytogenes showed substantial susceptibility toward N. sativa EO, thymoquinone, and carvacrol. A significant reduction in MIC's of EtBr and ciprofloxacin was noticed when tested in combination with N. sativa EO, thymoquinone, carvacrol and reserpine. In the presence of each compound the membrane integrity was disintegrated, and the EtBr accumulation increased which was comparable to positive control reserpine. CONCLUSION N. sativa EO might have a potential for controlling the antibiotic resistance in Listeria.
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Affiliation(s)
- Ahmad Mouwakeh
- Department of Microbiology and Biotechnology, Szent Istvan University, Budapest, Hungary
| | - Ágnes Telbisz
- Institute of Enzymology, Hungarian Academy of Science, Budapest, Hungary
| | - Gabriella Spengler
- Department of Medical Microbiology and Immunobiology, University of Szeged, Szeged, Hungary
| | - Csilla Mohácsi-Farkas
- Department of Microbiology and Biotechnology, Szent Istvan University, Budapest, Hungary
| | - Gabriella Kiskó
- Department of Microbiology and Biotechnology, Szent Istvan University, Budapest, Hungary
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205
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Yang W, Liu J, Blažeković B, Sun Y, Ma S, Ren C, Vladimir-Knežević S, Li C, Xing Y, Tian G, Wang Y. In vitro antibacterial effects of Tanreqing injection combined with vancomycin or linezolid against methicillin-resistant Staphylococcus aureus. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 18:169. [PMID: 29848316 PMCID: PMC5977505 DOI: 10.1186/s12906-018-2231-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 05/14/2018] [Indexed: 01/12/2023]
Abstract
BACKGROUND Combining conventional drugs and traditional medicine may represent a useful approach to combating antibiotic resistance, which has become a serious threat to global public health. This study aimed to evaluate the potential synergistic interactions between Tanreqing (TRQ) injection, a commercial traditional Chinese medicine formula used for the treatment of upper respiratory tract infection, and selected antibiotics used against methicillin-resistant Staphylococcus aureus (MRSA). METHODS The minimum inhibitory concentrations (MICs) of TRQ, vancomycin and linezolid against planktonic MRSA strain were determined by the broth microdilution method. The combined effects of TRQ and antibiotics were studied by the checkerboard method and the time-kill curve assay. The 2,3-bis-(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide (XTT) reduction assay was employed to determine the inhibitory effect of the test compounds alone and in combination against MRSA embedded in biofilms. RESULTS MRSA strain was found to be susceptible to TRQ formula with MIC value 4125 μg/ml, while the MIC values for antibiotics, vancomycin and linezolid, were 2.5 μg/ml. The checkerboard analysis revealed that TRQ markedly enhanced activities of the tested antibiotics by reducing their MICs. In the time-kill analysis, TRQ at 1/2 × MIC in combination with vancomycin at 1/2 × MIC, as well as TRQ at 1/8 × MIC in combination with linezolid at 1/2 × MIC decreased the viable colonies by ≥2log10 CFU/ml, resulting in a potent synergistic effect against planktonic MRSA. In contrast to the tested antibiotics, which did not affect mature MRSA biofilms at subinhibitory concentrations, TRQ alone showed strong ability to disrupt preformed biofilms and induce biofilm cell death. The combination of TRQ with vancomycin or linezolid at sub-MIC concentrations resulted in a synergistic antibiofilm effect significantly higher than for each single agent. CONCLUSIONS This study provides the first in vitro evidence on the synergistic effects of TRQ and vancomycin or linezolid against planktonic and biofilm MRSA, and revealed their optimal combination doses, thereby providing a rational basis for the combination therapies against MRSA.
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Affiliation(s)
- Weifeng Yang
- Experimental Research Center, China Academy of Chinese Medical Sciences, Nanxiao Road 16, Dongzhimen, Beijing, 100700 People’s Republic of China
| | - Jueling Liu
- Experimental Research Center, China Academy of Chinese Medical Sciences, Nanxiao Road 16, Dongzhimen, Beijing, 100700 People’s Republic of China
| | - Biljana Blažeković
- Department of Pharmacognosy, Faculty of Pharmacy and Biochemistry, University of Zagreb, Marulićev trg 20, 10000 Zagreb, Croatia
| | - Yanan Sun
- Experimental Research Center, China Academy of Chinese Medical Sciences, Nanxiao Road 16, Dongzhimen, Beijing, 100700 People’s Republic of China
| | - Shuhua Ma
- Experimental Research Center, China Academy of Chinese Medical Sciences, Nanxiao Road 16, Dongzhimen, Beijing, 100700 People’s Republic of China
| | - Chuanyun Ren
- ChuanYun Ren, Dongzhimen Hospital, Beijing University of Chinese Medicine, Haiyuncang alley 5, Dongcheng district, Beijing, 100700 People’s Republic of China
| | - Sanda Vladimir-Knežević
- Department of Pharmacognosy, Faculty of Pharmacy and Biochemistry, University of Zagreb, Marulićev trg 20, 10000 Zagreb, Croatia
| | - Chaohua Li
- Experimental Research Center, China Academy of Chinese Medical Sciences, Nanxiao Road 16, Dongzhimen, Beijing, 100700 People’s Republic of China
| | - Yajun Xing
- Experimental Research Center, China Academy of Chinese Medical Sciences, Nanxiao Road 16, Dongzhimen, Beijing, 100700 People’s Republic of China
| | - Guijie Tian
- Public health bureau of Tiexi district, Haifeng Road 2118, Tiexi district, Siping, 136000 People’s Republic of China
| | - Yi Wang
- Experimental Research Center, China Academy of Chinese Medical Sciences, Nanxiao Road 16, Dongzhimen, Beijing, 100700 People’s Republic of China
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206
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de Morais Oliveira-Tintino CD, Tintino SR, Limaverde PW, Figueredo FG, Campina FF, da Cunha FAB, da Costa RHS, Pereira PS, Lima LF, de Matos YMLS, Coutinho HDM, Siqueira-Júnior JP, Balbino VQ, da Silva TG. Inhibition of the essential oil from Chenopodium ambrosioides L. and α-terpinene on the NorA efflux-pump of Staphylococcus aureus. Food Chem 2018; 262:72-77. [PMID: 29751924 DOI: 10.1016/j.foodchem.2018.04.040] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 04/10/2018] [Accepted: 04/13/2018] [Indexed: 12/19/2022]
Abstract
This study was carried out to test the essential oil from C. ambrosioides leaves and its main constituent, α-Terpinene, in an antibacterial activity assay. As well, it was evaluated ability reduce resistance to norfloxacin and ethidium bromide was compared the Staphylococcus aureus 1199B whith 1199 wild type strain. The MIC of the C. ambrosioides essential oil and α-Terpinene were determined by microdilution method. The MIC of the essential oil and α-Terpinene presented a value ≥ 1024 μg/mL. However, when associated with antibacterials, the essential oil from C. ambrosioides leaves significantly reduced the MIC of antibiotics and ethidium bromide, characterizing an efflux pump inhibition. The C. ambrosioides essential oil, despite having no direct antibacterial activity against the S. aureus 1199B strain, showed a potentiating action when associated with antibacterial agents, this being attributed to an inhibition of efflux pumps.
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Affiliation(s)
- Cícera Datiane de Morais Oliveira-Tintino
- Laboratory of Microbiology and Molecular Biology, Department of Chemical Biology, Regional University of Cariri, Crato, Brazil; Laboratory of Farmatoxicological Prospecting of Bioactive Products (BIOFARMATOX), Department of Antibiotics, Federal University of Pernambuco (UFPE), Recife, Brazil
| | - Saulo Relison Tintino
- Laboratory of Microbiology and Molecular Biology, Department of Chemical Biology, Regional University of Cariri, Crato, Brazil
| | - Paulo W Limaverde
- Laboratory of Microbiology and Molecular Biology, Department of Chemical Biology, Regional University of Cariri, Crato, Brazil
| | - Fernando G Figueredo
- Laboratory of Microbiology and Molecular Biology, Department of Chemical Biology, Regional University of Cariri, Crato, Brazil
| | - Fábia F Campina
- Laboratory of Microbiology and Molecular Biology, Department of Chemical Biology, Regional University of Cariri, Crato, Brazil
| | - Francisco A B da Cunha
- Laboratory of Microbiology and Molecular Biology, Department of Chemical Biology, Regional University of Cariri, Crato, Brazil
| | - Roger H S da Costa
- Pharmacology and Medicinal Chemistry Laboratory, Department of Chemical Biology, Regional University of Cariri, Crato, Ceara, Brazil
| | - Pedro Silvino Pereira
- Laboratory of Farmatoxicological Prospecting of Bioactive Products (BIOFARMATOX), Department of Antibiotics, Federal University of Pernambuco (UFPE), Recife, Brazil
| | - Luciene F Lima
- Laboratory of Microbiology and Molecular Biology, Department of Chemical Biology, Regional University of Cariri, Crato, Brazil
| | - Yedda M L S de Matos
- Laboratory of Microbiology and Molecular Biology, Department of Chemical Biology, Regional University of Cariri, Crato, Brazil
| | - Henrique Douglas Melo Coutinho
- Laboratory of Microbiology and Molecular Biology, Department of Chemical Biology, Regional University of Cariri, Crato, Brazil.
| | - José P Siqueira-Júnior
- Laboratory of Microrganisms Genetics (LGM), Department of Molecular Biology - CCEN, UFPB, Brazil
| | - Valdir Q Balbino
- Evolutionary Biology and Bioinformatics Laboratory (LABBE), Department of Genetics - CCB, UFPE, Brazil
| | - Teresinha Gonçalves da Silva
- Laboratory of Farmatoxicological Prospecting of Bioactive Products (BIOFARMATOX), Department of Antibiotics, Federal University of Pernambuco (UFPE), Recife, Brazil
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207
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Al Akeel R, Mateen A, Alharbi KK, Alyousef AA, Al-Mandeel HM, Syed R. Purification and MIC analysis of antimicrobial proteins from Cucumis sativus L. seeds. Altern Ther Health Med 2018; 18:121. [PMID: 29615020 PMCID: PMC5883520 DOI: 10.1186/s12906-018-2176-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 03/19/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Cucumis sativus L. (cucumber), from the family Cucurbitaceae, is a therapeutic plant with various pharmacological benefits, broadly utilized as a part of complementary medicine (e.g., Unani, Ayurveda, Siddha, and Traditional Chinese). In light of past research discoveries, this plant had been chosen to consider its potential antibacterial action. METHODS Extracts were purified by dialysis and ion exchange chromatography strategy and then assayed for antibacterial activity against four standard pathogenic bacterial strains known to cause foodborne infections and spoilage of food and herbal drugs. Antimicrobial peptides were extracted from seeds using a sodium phosphate citrate (pH 7.2) - CTAB cradle (pH 6.0). RESULTS The highest protein concentration was seen with elute fractions 1 and 3 (370 mg/mL) compared with elute fractions 2 and 4 (340 mg/mL). Among the bacteria utilized, E. coli was clearly the most sensitive out of selected four strains. CONCLUSION Our results suggest that Cucumis sativus L seeds extracts have significant potentials as new antimicrobial agents.
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208
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Singhal R, Siddibhavi M, Sankeshwari R, Patil P, Jalihal S, Ankola A. Effectiveness of three mouthwashes - Manuka honey, Raw honey, and Chlorhexidine on plaque and gingival scores of 12-15-year-old school children: A randomized controlled field trial. J Indian Soc Periodontol 2018; 22:34-39. [PMID: 29568170 PMCID: PMC5855267 DOI: 10.4103/jisp.jisp_356_17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objectives: The aim of this study is to compare the effectiveness of three types of mouthwashes manuka honey (MH), raw honey (RH), and chlorhexidine (CHX) on plaque and gingival scores of 12–15-year-old government school children. Study Design: This study was a double-blind, randomized controlled field trial conducted in Belagavi city, India. Materials and Methods: One hundred and thirty-five government school children aged 12–15 years were randomly selected and allocated into three groups, RH, MH, and CHX mouthwash groups. Ten milliliters each of honey-based mouthwash formulation and CHX mouthwashes (0.2%) were administered according to the group allocation twice daily for 21 days. All the children were examined at baseline, 22nd day (after discontinuation of mouthwash) and 28th day (1 week after discontinuation of mouthwash) for Gingival (Loe and silness 1963) and Plaque Index (Silness and Loe, 1964). Results: Descriptive statistics was applied for distribution of study participants according to age and gender. One-way ANOVA followed by Tukey's post hoc test and repeated measures ANOVA test followed by Bonferroni's post hoc were applied for inter- and intragroup comparison, respectively. Statistically significant reductions (P < 0.001) in plaque and gingival scores were observed in all the three types of mouthwash groups at the end of the 22nd day and 28th day. MH and RH mouthwash demonstrated equal effectiveness, whereas CHX mouthwash showed the maximum reduction in clinical parameters. Conclusion: Honey-based mouthwash showed a promising antimicrobial effect on dental caries and plaque and gingival scores.
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Affiliation(s)
- Richa Singhal
- Department of Public Health Dentistry, KAHE'S KLE V.K. Institute of Dental Sciences, KLE Academy of Higher Education and Research (KLE university), Belagavi, Karnataka, India
| | - Mahantesh Siddibhavi
- Department of Public Health Dentistry, KAHE'S KLE V.K. Institute of Dental Sciences, KLE Academy of Higher Education and Research (KLE university), Belagavi, Karnataka, India
| | - Roopali Sankeshwari
- Department of Public Health Dentistry, KAHE'S KLE V.K. Institute of Dental Sciences, KLE Academy of Higher Education and Research (KLE university), Belagavi, Karnataka, India
| | - Pratibha Patil
- Department of Public Health Dentistry, KAHE'S KLE V.K. Institute of Dental Sciences, KLE Academy of Higher Education and Research (KLE university), Belagavi, Karnataka, India
| | - Sagar Jalihal
- Department of Public Health Dentistry, KAHE'S KLE V.K. Institute of Dental Sciences, KLE Academy of Higher Education and Research (KLE university), Belagavi, Karnataka, India
| | - Anil Ankola
- Department of Public Health Dentistry, KAHE'S KLE V.K. Institute of Dental Sciences, KLE Academy of Higher Education and Research (KLE university), Belagavi, Karnataka, India
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209
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Potentiation effects by usnic acid in combination with antibiotics on clinical multi-drug resistant isolates of methicillin-resistant Staphylococcus aureus (MRSA). Med Chem Res 2018. [DOI: 10.1007/s00044-018-2161-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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210
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Milenković M, Stošović J, Slavkovska V. Synergy between Essential Oils of Calamintha Species (Lamiaceae) and Antibiotics. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801300325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The subject of the study was the investigation of the chemical composition and antimicrobial activity of the essential oils (EOs) isolated from Calamintha sylvatica, C. vardarensis, C. nepeta and C. glandulosa, as well as their antibacterial activity in combination with antibiotics. The quantitative and qualitative analysis of EOs was performed using the GC/FID and GC/MS methods. The antimicrobial activity of EOs against six standard bacterial strains and one strain of yeast was tested using the broth microdilution method, while the antimicrobial activity of a combination of essential oils and gentamicin/ciprofloxacin was tested by the checkerboard method. The dominant components (> 10%) of the essential oils were: cis-piperitone epoxide and menthone ( C. sylvatica), pulegone and menthone ( C. vardarensis), pulegone and piperitenone ( C. nepeta), pulegone, piperitenone, menthone and piperitone ( C. glandulosa). EOs did not exhibit significant antimicrobial activity except the essential oil of C. vardarensis which was selectively active against Staphylococcus aureus (MIC - 21.25 μg/mL). The overall effect of essential oil-antibiotic combinations varied from synergistic (FICI ≤ 0.5) to antagonistic (FICI ≥ 2) depending on the bacterial strain tested.
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Affiliation(s)
- Marina Milenković
- Department of Microbiology and Immunology, University of Belgrade - Faculty of Pharmacy, Vojvode Stepe 450, 11000 Belgrade, Serbia
| | - Jelena Stošović
- Department of Microbiology and Immunology, University of Belgrade - Faculty of Pharmacy, Vojvode Stepe 450, 11000 Belgrade, Serbia
| | - Violeta Slavkovska
- Department of Botany, University of Belgrade – Faculty of Pharmacy, Vojvode Stepe 450, 11000 Belgrade, Serbia
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211
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Cha JD, Jung EK, Choi SM, Lee KY, Kang SW. Antimicrobial activity of the chloroform fraction of Drynaria fortunei against oral pathogens. J Oral Sci 2018; 59:31-38. [PMID: 28367899 DOI: 10.2334/josnusd.16-0150] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Drynaria fortunei (D. fortunei), widely used in traditional Korean medicine, is reportedly effective in treating inflammation, hyperlipidemia, bone fractures, oxidative damage, arteriosclerosis, rheumatism, and gynecological diseases. The objective of this study was to evaluate the antibacterial effects of the chloroform fraction of D. fortunei (DFCF) and assess the synergistic effects of DFCF with antibiotics against bacterial pathogens. This was carried out by calculating the minimal inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) and performing checkerboard dilution test and time-kill assays. The MICs/MBCs for DFCF, ampicillin, and gentamicin against all oral strains were >39-2,500/5,000 μg/mL, 0.25-64/0.25-64 µg/mL, and 0.5-256/1-512 µg/mL, respectively. DFCF exhibited the highest activity against the periodontic pathogens Prevotella intermedia and Porphylomonas gingivalis. DFCF in combination with ampicillin showed a strong synergistic effect against oral bacteria (fractional inhibitory concentration (FIC) index ≤0.5), whereas on combining with gentamicin, it reduced the on half-eighth times than used alone (FICI ≤ 0.5). DFCF combined with ampicillin or gentamicin killed 100% of most tested bacteria within 3-4 h. The results of this study demonstrate the antimicrobial and synergistic activity of DFCF and antibiotics against oral pathogens.
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Affiliation(s)
- Jeong-Dan Cha
- Department of Oral Microbiology and Institute of Oral Bioscience, Chonbuk National University
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Shin J, Prabhakaran VS, Kim KS. The multi-faceted potential of plant-derived metabolites as antimicrobial agents against multidrug-resistant pathogens. Microb Pathog 2018; 116:209-214. [PMID: 29407230 DOI: 10.1016/j.micpath.2018.01.043] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 01/22/2018] [Accepted: 01/26/2018] [Indexed: 12/17/2022]
Abstract
Multidrug-resistant (MDR) pathogens are currently causing serious problems globally in the medical setting. Improper and extensive usage of antibiotics results in a selective pressure supporting the rise of antibiotic-resistant microbes. Many key cellular bacterial components, including enzymes and small noncoding RNAs (sRNAs), and their involvement in MDR have been well studied, but exploiting such components in eradicating these pathogens requires further study. Delineation of many mechanisms that underpin the known MDR pathways necessitates urgent development of new specific strategies to control the rise of MDR pathogens. Botanical derivatives are comparatively safer than currently used antibiotics and exert multiple therapeutic benefits associated with their high efficacy. Numerous plant-derived compounds display synergistic activity with antibiotics against many MDR pathogens. Such plant derivatives include alkaloids, flavonoids, terpenoids, and tannins. A synthetic biological approach, e.g., metabolic engineering of secondary metabolites, can be utilized to exploit the natural metabolic pathways against MDR microbes. In this review, we focused on the major threats of antibiotic resistance, and the utilization of plant-derived compounds as alternative therapeutic agents to limit the rise of MDR pathogens.
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Affiliation(s)
- Jonghoon Shin
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Vasantha-Srinivasan Prabhakaran
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Kwang-Sun Kim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea.
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213
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Cuzzucoli Crucitti V, Migneco LM, Piozzi A, Taresco V, Garnett M, Argent RH, Francolini I. Intermolecular interaction and solid state characterization of abietic acid/chitosan solid dispersions possessing antimicrobial and antioxidant properties. Eur J Pharm Biopharm 2018; 125:114-123. [PMID: 29366926 DOI: 10.1016/j.ejpb.2018.01.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 10/18/2017] [Accepted: 01/19/2018] [Indexed: 10/18/2022]
Abstract
The aim of this work was to prepare and characterize solid dispersions of abietic acid (AB) and chitosan (CS) to investigate how formulation of the mixture may help in the battle against microbial colonization in different areas, such as the biomedical field or the food industry. Solid dispersions were characterized by differential scanning calorimetry, infrared spectroscopy, Raman spectroscopy, polarized optical microscopy, zeta potential and size analysis. The data showed that the dispersion/solvent evaporation method formed solid dispersions in which abietic acid was molecularly dispersed in the carrier. A synergistic effect between the two components in terms of antioxidant and antimicrobial properties was found, especially in the formulations obtained with 1/1 AB/CS molar ratio. Interestingly, the aggregation state (amorphous/crystalline) of AB seemed to affect the antimicrobial activity of the formulation, suggesting increased bioactivity when the drug was in the amorphous state. These findings, together with the demonstrated biocompatibility of the formulations, seem to open promising perspectives for a successful application of the developed AB/CS formulations in the biomedical field or in the food industry.
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Affiliation(s)
| | | | - Antonella Piozzi
- Sapienza University of Rome, Department of Chemistry, Rome, Italy
| | - Vincenzo Taresco
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Martin Garnett
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Richard H Argent
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
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How to Study Antimicrobial Activities of Plant Extracts: A Critical Point of View. SUSTAINABLE DEVELOPMENT AND BIODIVERSITY 2018. [DOI: 10.1007/978-3-319-67045-4_3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Maheshwari M, Safar Althubiani A, Hasan Abulreesh H, Abul Qais F, Shavez Khan M, Ahmad I. Bioactive extracts of Carum copticum L. enhances efficacy of ciprofloxacin against MDR enteric bacteria. Saudi J Biol Sci 2017; 26:1848-1855. [PMID: 31762667 PMCID: PMC6864163 DOI: 10.1016/j.sjbs.2017.12.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 12/11/2017] [Accepted: 12/20/2017] [Indexed: 11/06/2022] Open
Abstract
The widespread occurrence of extended spectrum β-lactamases (ESβLs) producing enteric bacteria and their co-resistance with flouroquinolones has impaired the current antimicrobial therapy. This has prompted the search for new alternatives through synergistic approaches with herbal extracts. In this study Carum copticum (seeds) was extracted first in methanol and then subsequently extracted in different organic solvents. MIC of plant extracts, ciprofloxacin and thymol was determined by broth micro-dilution method using TTC. Synergism between plant extracts and ciprofloxacin was assayed by the checkerboard method. Chemical constituents of active extracts were analyzed by GC-MS. Methanolic, hexane and ether extract of Carum copticum exhibited significant antibacterial activity with MIC values ranged from 0.25 mg/ml to 2.0 mg/ml. Synergy analysis between Carum copticum extracts and ciprofloxacin combinations revealed FIC index in the range of 0.093–0.25. About 81% ciprofloxacin resistant ESβL producing enteric bacteria were re-sensitized in the presence of 15.6–250 μg/ml of methanolic extract of Carum copticum. Moreover, ciprofloxacin showed 8 to 64 folds reduction in MIC in presence of 250 and 500 μg/ml of hexane extract. Whereas, 4–32 folds reduction in MIC of ciprofloxacin was achieved in the presence of 31.25 and 62.5 μg/ml of ether extract, indicating synergistic enhancement of drug activity. The chemical analysis of hexane and ether extracts by GC-MS revealed the common occurrence of one or more phenolic hydroxyl at different locations on benzene ring. This study demonstrated the potential use of herbal extract of Carum copticum in combination therapy against ESβL producing bacteria.
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Affiliation(s)
- Meenu Maheshwari
- Department of Agricultural Microbiology, Aligarh Muslim University, Aligarh 202002, India
| | | | - Hussein Hasan Abulreesh
- Department of Biology, Faculty of Applied Science, Umm Al Qura University, Makkah, Saudi Arabia
| | - Faizan Abul Qais
- Department of Agricultural Microbiology, Aligarh Muslim University, Aligarh 202002, India
| | - Mohd Shavez Khan
- Department of Agricultural Microbiology, Aligarh Muslim University, Aligarh 202002, India
| | - Iqbal Ahmad
- Department of Agricultural Microbiology, Aligarh Muslim University, Aligarh 202002, India
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216
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Zacchino SA, Butassi E, Liberto MD, Raimondi M, Postigo A, Sortino M. Plant phenolics and terpenoids as adjuvants of antibacterial and antifungal drugs. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2017; 37:27-48. [PMID: 29174958 DOI: 10.1016/j.phymed.2017.10.018] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 10/30/2017] [Indexed: 05/27/2023]
Abstract
BACKGROUND The intensive use of antibacterial and antifungal drugs has dramatically increased the microbial resistance and has led to a higher number of difficult-to-eradicate infections. Combination therapy with two or more antimicrobial drugs has emerged some years ago to overcome the issue, but it has proven to be not completely effective. Natural secondary metabolites of MW ≤ 500 represent promising adjuvants for antimicrobials and have been the object of several researches that have increased in the last two decades. PURPOSE The purpose of this Review is to do a literature search of the natural compounds that showed high enhancing capacity of antibacterials' and antifungals' effects against planktonic bacteria and fungi and to analyze which are the natural products most used in combination with a focus on polyphenols and terpenoids. RESULTS One hundred of papers were collected for reviewing. Fifty six (56) of them deal with combinations of low MW natural products with antibacterial drugs against planktonic bacteria and forty four (44) on natural products with antifungal drugs against planktonic fungi. Of the antibacterial adjuvants, 41 (73%) were either polyphenols (27; 48%) or terpenes (14; 25%). The remaining 15 papers (27%), deal with different class of natural products. Since most natural potentiators belong to the terpene or phenolic structural types, a more detailed description of the works dealing with these type of compounds is provided here. Bacterial and fungal resistance mechanisms, the modes of action of the main classes of antibacterial and antifungal drugs and the methodologies most used to assess the type of interactions in the combinations were included in the Review too. CONCLUSIONS AND PERSPECTIVES Several promising results on the potentiation effects of antifungals' and antibacterials' activities by low MW natural products mainly on polyphenols and terpenes were reported in the literature and, in spite of that most works included only in vitro assays, this knowledge opens a wide range of possibilities for the combination antimicrobial therapy. Further research including in vivo assays and clinical trials are required to determine the relevance of these antimicrobial enhancers in the clinical area and should be the focus of future studies in order to develop new antimicrobial combination agents that overpass the drawbacks of the existing antibiotics and antifungals in clinical use.
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Affiliation(s)
- Susana A Zacchino
- Área Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina.
| | - Estefania Butassi
- Área Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina
| | - Melina Di Liberto
- Área Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina
| | - Marcela Raimondi
- Area Microbiología, Facultad de Cs. Médicas, Universidad Nacional de Rosario, Santa Fe 3100, Rosario 2000, Argentina
| | - Agustina Postigo
- Área Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina
| | - Maximiliano Sortino
- Área Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina; Área Micología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina
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217
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Cavalcanti Filho JRN, Silva TF, Nobre WQ, Oliveira de Souza LI, Silva e Silva Figueiredo CS, de Figueiredo RCBQ, de Gusmão NB, Silva MV, Nascimento da Silva LC, Correia MTDS. Antimicrobial activity of Buchenavia tetraphylla against Candida albicans strains isolated from vaginal secretions. PHARMACEUTICAL BIOLOGY 2017; 55:1521-1527. [PMID: 28376640 PMCID: PMC7011787 DOI: 10.1080/13880209.2017.1304427] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 01/25/2017] [Accepted: 03/03/2017] [Indexed: 06/07/2023]
Abstract
CONTEXT Buchenavia tetraphylla (Aubl.) RA Howard (Combretaceae: Combretoideae) is an ethnomedicinal plant with reported antifungal action. OBJECTIVE This study evaluates the antimicrobial activity of B. tetraphylla leaf extracts against clinical isolates of Candida albicans. The morphological alterations, combinatory effects with fluconazole and the cytotoxicity of the active extract were analyzed. MATERIALS AND METHODS Extracts were obtained using different solvents (hexane: BTHE; chloroform: BTCE; ethyl acetate: BTEE; and methanol: BTME). Antimicrobial activity was determined by the broth microdilution method using nine strains of C. albicans isolated from vaginal secretions and one standard strain (UFPEDA 1007). RESULTS All extracts showed anti-C. albicans activity, including against the azole-resistant strains. The MIC values ranged from 156 to 2500 μg/mL for the BTHE; 156 to 1250 μg/mL for the BTCE; 625 to 1250 μg/mL for the BTME and 625 μg/mL to 2500 μg/mL for the BTEE. BTME showed the best anti-C. albicans activity. This extract demonstrated additive/synergistic interactions with fluconazole. Scanning electron microscopy analysis suggested that the BTME interferes with the cell division and development of C. albicans. BTME showed IC50 values of 981 and 3935 μg/mL, against J774 macrophages and human erythrocytes, respectively. This extract also enhanced the production of nitric oxide by J774 macrophages. DISCUSSION AND CONCLUSION Buchenavia tetraphylla methanolic extract (BTME) is a great source of antimicrobial compounds that are able to enhance the action of fluconazole against different C. albicans strains; this action seems related to inhibition of cell division.
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Affiliation(s)
| | - Tiago Fonseca Silva
- Departamento de Bioquímica, Universidade Federal de Pernambuco, Recife, Brasil
- Curso de Farmácia, Faculdade Pernambucana de Saúde, Recife, Brasil
| | | | | | | | | | | | - Márcia Vanusa Silva
- Departamento de Bioquímica, Universidade Federal de Pernambuco, Recife, Brasil
| | - Luís Cláudio Nascimento da Silva
- Curso de Farmácia, Faculdade Pernambucana de Saúde, Recife, Brasil
- Programa de Pós-graduação, Universidade CEUMA, Sao Luis, Brasil
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218
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Ayeleso TB, Matumba MG, Mukwevho E. Oleanolic Acid and Its Derivatives: Biological Activities and Therapeutic Potential in Chronic Diseases. Molecules 2017; 22:molecules22111915. [PMID: 29137205 PMCID: PMC6150249 DOI: 10.3390/molecules22111915] [Citation(s) in RCA: 177] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 10/31/2017] [Indexed: 12/13/2022] Open
Abstract
The increasing demand for natural products as an alternative therapy for chronic diseases has encouraged research into the pharmacological importance of bioactive compounds from plants. Recently, there has been a surge of interest in the therapeutic potential of oleanolic acid (OA) in the prevention and management of chronic diseases. Oleanolic acid is a pentacyclic triterpenoid widely found in plants, including fruits and vegetables with different techniques and chromatography platforms being employed in its extraction and isolation. Several studies have demonstrated the potential therapeutic effects of OA on different diseases and their symptoms. Furthermore, oleanolic acid also serves as a framework for the development of novel semi-synthetic triterpenoids that could prove vital in finding therapeutic modalities for various ailments. There are recent advances in the design and synthesis of chemical derivatives of OA to enhance its solubility, bioavailability and potency. Some of these derivatives have also been therapeutic candidates in a number of clinical trials. This review consolidates and expands on recent reports on the biological effects of oleanolic acid from different plant sources and its synthetic derivatives as well as their mechanisms of action in in vitro and in vivo study models. This review suggests that oleanolic acid and its derivatives are important candidates in the search for alternative therapy in the treatment and management of chronic diseases.
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Affiliation(s)
- Taiwo Betty Ayeleso
- Department of Biochemistry, North West University, Private Bag X2046, Mmabatho 2735, South Africa.
| | - Mashudu Given Matumba
- Department of Biochemistry, North West University, Private Bag X2046, Mmabatho 2735, South Africa.
| | - Emmanuel Mukwevho
- Department of Biochemistry, North West University, Private Bag X2046, Mmabatho 2735, South Africa.
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219
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Yang SK, Yusoff K, Mai CW, Lim WM, Yap WS, Lim SHE, Lai KS. Additivity vs Synergism: Investigation of the Additive Interaction of Cinnamon Bark Oil and Meropenem in Combinatory Therapy. Molecules 2017; 22:molecules22111733. [PMID: 29113046 PMCID: PMC6150308 DOI: 10.3390/molecules22111733] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 10/06/2017] [Accepted: 10/11/2017] [Indexed: 02/05/2023] Open
Abstract
Combinatory therapies have been commonly applied in the clinical setting to tackle multi-drug resistant bacterial infections and these have frequently proven to be effective. Specifically, combinatory therapies resulting in synergistic interactions between antibiotics and adjuvant have been the main focus due to their effectiveness, sidelining the effects of additivity, which also lowers the minimal effective dosage of either antimicrobial agent. Thus, this study was undertaken to look at the effects of additivity between essential oils and antibiotic, via the use of cinnamon bark essential oil (CBO) and meropenem as a model for additivity. Comparisons between synergistic and additive interaction of CBO were performed in terms of the ability of CBO to disrupt bacterial membrane, via zeta potential measurement, outer membrane permeability assay and scanning electron microscopy. It has been found that the additivity interaction between CBO and meropenem showed similar membrane disruption ability when compared to those synergistic combinations which was previously reported. Hence, results based on our studies strongly suggest that additive interaction acts on a par with synergistic interaction. Therefore, further investigation in additive interaction between antibiotics and adjuvant should be performed for a more in depth understanding of the mechanism and the impacts of such interaction.
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Affiliation(s)
- Shun-Kai Yang
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
| | - Khatijah Yusoff
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
| | - Chun-Wai Mai
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, No. 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Kuala Lumpur, Malaysia.
| | - Wei-Meng Lim
- Department of Pharmaceutical Technology, School of Pharmacy, International Medical University, No. 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Kuala Lumpur, Malaysia.
| | - Wai-Sum Yap
- Department of Biotechnology, Faculty of Applied Sciences, UCSI University, 56000 Cheras, Kuala Lumpur, Malaysia.
| | - Swee-Hua Erin Lim
- Perdana University-Royal College of Surgeons in Ireland, Perdana University, MAEPS Building, Serdang, Selangor, Malaysia.
- Health Sciences Division, Abu Dhabi Women's College, Higher Colleges of Technology, 41012 Abu Dhabi, United Arab Emirates.
| | - Kok-Song Lai
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
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220
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Teethaisong Y, Pimchan T, Srisawat R, Hobbs G, Eumkeb G. Boesenbergia rotunda (L.) Mansf. extract potentiates the antibacterial activity of some β-lactams against β-lactam-resistant staphylococci. J Glob Antimicrob Resist 2017; 12:207-213. [PMID: 29102774 DOI: 10.1016/j.jgar.2017.10.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 10/22/2017] [Accepted: 10/24/2017] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVES The purpose of this study was to investigate the effect of Boesenbergia rotunda (L.) Mansf. extract (BRE) and peptidoglycan inhibitor antibiotics, alone and in combination, against β-lactam-resistant staphylococci. METHODS Antibacterial and synergistic activities of BRE alone and in combination with ampicillin (AMP), cloxacillin (CLX), cefazolin (CZO) or vancomycin (VAN) were evaluated against two β-lactam-resistant Staphylococcus aureus (BRSA) isolates and one β-lactam-resistant Staphylococcus epidermidis (BRSE) isolate. The activities were confirmed by killing curve assays. The preliminary antimicrobial action was elucidated by transmission electron microscopy (TEM) and cytoplasmic membrane (CM) permeability assay. RESULTS All tested staphylococci were inhibited by BRE at a minimum inhibitory concentration (MIC) of 16μg/mL. Two BRSA strains showed high resistance to CLX, AMP and CZO, whilst BRSE was resistant to CLX and AMP. All tested isolates remained susceptible to VAN. Chequerboard assay demonstrated a fractional inhibitory concentration index (FICI) of 0.50 for the BRE+CLX combination against the BRSA strains. Killing curve determinations confirmed the antibacterial and synergistic activities. TEM revealed collapse of the CM in BRE-treated cells and damage both of the CM and peptidoglycan (PG) in BRE+CLX-treated cells. The CM permeability assay showed that either BRE or nisin alone as well as BRE+CLX significantly induced leakage of OD260nm-absorbing materials. CONCLUSIONS BRE potentiated the activity of β-lactams, particularly CLX, against β-lactam-resistant staphylococci by damaging the CM and PG layer, leading to leakage of intracellular material. Combination of BRE and β-lactams provides a potential way forward in developing novel antistaphylococcal agents.
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Affiliation(s)
- Yothin Teethaisong
- School of Preclinic, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Thippawan Pimchan
- School of Biology, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Rungrudee Srisawat
- School of Preclinic, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Glyn Hobbs
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK
| | - Griangsak Eumkeb
- School of Preclinic, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
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221
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Duan F, Feng X, Jin Y, Liu D, Yang X, Zhou G, Liu D, Li Z, Liang XJ, Zhang J. Metal–carbenicillin framework-based nanoantibiotics with enhanced penetration and highly efficient inhibition of MRSA. Biomaterials 2017; 144:155-165. [DOI: 10.1016/j.biomaterials.2017.08.024] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 08/06/2017] [Accepted: 08/14/2017] [Indexed: 02/06/2023]
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222
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Santos SAO, Trindade SS, Oliveira CSD, Parreira P, Rosa D, Duarte MF, Ferreira I, Cruz MT, Rego AM, Abreu MH, Rocha SM, Silvestre AJD. Lipophilic Fraction of Cultivated Bifurcaria bifurcata R. Ross: Detailed Composition and In Vitro Prospection of Current Challenging Bioactive Properties. Mar Drugs 2017; 15:md15110340. [PMID: 29104253 PMCID: PMC5706030 DOI: 10.3390/md15110340] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 10/19/2017] [Accepted: 10/23/2017] [Indexed: 01/22/2023] Open
Abstract
Macroalgae have been seen as an alternative source of molecules with promising bioactivities to use in the prevention and treatment of current lifestyle diseases. In this vein, the lipophilic fraction of short-term (three weeks) cultivated Bifurcaria bifurcata was characterized in detail by gas chromatography–mass spectrometry (GC-MS). B. bifurcata dichloromethane extract was composed mainly by diterpenes (1892.78 ± 133.97 mg kg−1 dry weight (DW)), followed by fatty acids, both saturated (550.35 ± 15.67 mg kg−1 DW) and unsaturated (397.06 ± 18.44 mg kg−1 DW). Considerable amounts of sterols, namely fucosterol (317.68 ± 26.11 mg kg−1 DW) were also found. In vitro tests demonstrated that the B. bifurcata lipophilic extract show antioxidant, anti-inflammatory and antibacterial activities (against both Gram-positive and Gram-negative bacteria), using low extract concentrations (in the order of µg mL−1). Enhancement of antibiotic activity of drug families of major clinical importance was observed by the use of B. bifurcata extract. This enhancement of antibiotic activity depends on the microbial strain and on the antibiotic. This work represents the first detailed phytochemical study of the lipophilic extract of B. bifurcata and is, therefore, an important contribution for the valorization of B. bifurcata macroalgae, with promising applications in functional foods, nutraceutical, cosmetic and biomedical fields.
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Affiliation(s)
- Sónia A O Santos
- CICECO-Aveiro Institute of Materials and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Stephanie S Trindade
- CICECO-Aveiro Institute of Materials and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Catia S D Oliveira
- CICECO-Aveiro Institute of Materials and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Paula Parreira
- Centro de Biotecnologia Agrícola e Agro-Alimentar do Alentejo (CEBAL)/Instituto Politécnico de Beja (IPBeja), 7801-908 Beja, Portugal.
| | - Daniela Rosa
- Centro de Biotecnologia Agrícola e Agro-Alimentar do Alentejo (CEBAL)/Instituto Politécnico de Beja (IPBeja), 7801-908 Beja, Portugal.
| | - Maria F Duarte
- Centro de Biotecnologia Agrícola e Agro-Alimentar do Alentejo (CEBAL)/Instituto Politécnico de Beja (IPBeja), 7801-908 Beja, Portugal.
- ICAAM-Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Universidade de Évora, Pólo da Mitra, 7006-554 Évora, Portugal.
| | - Isabel Ferreira
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.
- FFUC-Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Maria T Cruz
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.
- FFUC-Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Andreia M Rego
- ALGAplus-Prod. e Comerc. De Algas e Seus Derivados, Lda., 3830-196 Ílhavo, Portugal.
| | - Maria H Abreu
- ALGAplus-Prod. e Comerc. De Algas e Seus Derivados, Lda., 3830-196 Ílhavo, Portugal.
| | - Silvia M Rocha
- QOPNA and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Armando J D Silvestre
- CICECO-Aveiro Institute of Materials and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
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Bostanghadiri N, Pormohammad A, Chirani AS, Pouriran R, Erfanimanesh S, Hashemi A. Comprehensive review on the antimicrobial potency of the plant polyphenol Resveratrol. Biomed Pharmacother 2017; 95:1588-1595. [PMID: 28950659 DOI: 10.1016/j.biopha.2017.09.084] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 09/14/2017] [Accepted: 09/18/2017] [Indexed: 02/09/2023] Open
Abstract
Treatment of some infectious diseases are becoming more complicated because of increasing drug resistance rate and lack of proper antibiotics. Because of the rapid increase in drug-resistance trend, there is an urgent need for alternative microbicides to control infectious diseases. Resveratrol (RSV) is a small plant polyphenol that is naturally produced and distributed in 72 particular families of plants. The usage of natural derivatives such as RSV, have become popular among researchers for curing acute and chronic diseases. The purpose of the preset study was to comprehensively review and survey the antimicrobial potency of RSV. The present study demonstrates RSV as a natural antimicrobial agent.
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Affiliation(s)
- Narjess Bostanghadiri
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Pormohammad
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Alireza Salimi Chirani
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ramin Pouriran
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Soroor Erfanimanesh
- Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Hashemi
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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224
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Investigation of chitosan’s antibacterial activity against vancomycin resistant microorganisms and their biofilms. Carbohydr Polym 2017; 174:369-376. [DOI: 10.1016/j.carbpol.2017.06.087] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 06/02/2017] [Accepted: 06/21/2017] [Indexed: 11/22/2022]
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225
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Rao H, Lai P, Gao Y. Chemical Composition, Antibacterial Activity, and Synergistic Effects with Conventional Antibiotics and Nitric Oxide Production Inhibitory Activity of Essential Oil from Geophila repens (L.) I.M. Johnst. Molecules 2017; 22:molecules22091561. [PMID: 28926976 PMCID: PMC6151674 DOI: 10.3390/molecules22091561] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 09/13/2017] [Accepted: 09/14/2017] [Indexed: 11/17/2022] Open
Abstract
Geophila repens (L.) I.M. Johnst, a perennial herb, belongs to the Rubiaceae family. In this study, we identified the chemical composition of the Geophila repens essential oil (GR-EO) for the first time. Totally, seventy-seven compounds were identified according to GC and GC-MS, which represent 98.0% of the oil. And the major components of GR-EO were β-caryophyllene (23.3%), β-elemene (8.0%), farnesyl butanoate (7.4%), myrcene (3.5%), and trans-nerolidol (3.3%). Then we evaluated the antibacterial activities of GR-EO and the synergistic effects of GR-EO in combination with commercial antibiotics using the microdilution and Checkerboard method. The results demonstrated that GR-EO possessed an excellent broad spectrum antibacterial activity, especially against Pseudomonas aeruginosa and Bacillus subtilis. It also showed that the combined application of GR-EO with antibiotics led to synergistic effects in most cases. And the most prominent synergistic effect was noticed when GR-EO was in combination with Streptomycin and tested against Escherichia coli (fractional inhibitory concentration indices (FICI) of 0.13). Additionally, the results of a Griess assay revealed that GR-EO exhibited a potent inhibitory effect on NO production in lipopolysaccharide (LPS)-activated RAW 264.7 (murine macrophage) cells. In conclusion, the combination of GR-EO and the commercial antibiotics has significant potential for the development of new antimicrobial treatment and reduction of drug resistance.
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Affiliation(s)
- Huijuanzi Rao
- Marine College, Shandong University, Weihai 264209, China.
| | - Pengxiang Lai
- Marine College, Shandong University, Weihai 264209, China.
| | - Yang Gao
- Marine College, Shandong University, Weihai 264209, China.
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Zhou Z, Pan C, Lu Y, Gao Y, Liu W, Yin P, Yu X. Combination of Erythromycin and Curcumin Alleviates Staphylococcus aureus Induced Osteomyelitis in Rats. Front Cell Infect Microbiol 2017; 7:379. [PMID: 28884090 PMCID: PMC5573719 DOI: 10.3389/fcimb.2017.00379] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 08/09/2017] [Indexed: 12/19/2022] Open
Abstract
Osteomyelitis is commonly caused by Staphylococcus aureus. Both erythromycin and curcumin can suppress S. aureus growth, but their roles in osteomyelitis are barely studied. We aim to explore the activities of erythromycin and curcumin against chronical osteomyelitis induced by methicillin-resistant S. aureus (MRSA). Chronicle implant-induced osteomyelitis was established by MRSA infection in male Wistar rats. Four weeks after bacterial inoculation, rats received no treatment, erythromycin monotherapy, curcumin monotherapy, or erythromycin plus curcumin twice daily for 2 weeks. Bacterial levels, bone infection status, inflammatory signals and side effects were evaluated. Rats tolerated all treatments well, with no death or side effects such as, diarrhea and weight loss. Two days after treatment completion, erythromycin monotherapy did not suppress bacterial growth and had no effect in bone infection, although it reduced serum pro-inflammatory cytokines tumor necrosis factor (TNF)-α and interleukin (IL)-6. Curcumin monotherapy slightly suppressed bacterial growth, alleviated bone infection and reduced TNF-α and IL-6. Erythromycin and curcumin combined treatment markedly suppressed bacterial growth, substantially alleviated bone infection and reduced TNF-α and IL-6. Combination of erythromycin and curcumin lead a much stronger efficiency against MRSA induced osteomyelitis in rats than monotherapy. Our study suggests that erythromycin and curcumin could be a new combination for treating MRSA induced osteomyelitis.
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Affiliation(s)
- Zubin Zhou
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai, China
| | - Chenhao Pan
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai, China
| | - Ye Lu
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai, China
| | - Youshui Gao
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai, China
| | - Wei Liu
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai, China
| | - Peipei Yin
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai, China
| | - Xiaowei Yu
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai, China
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Chandar B, Poovitha S, Ilango K, MohanKumar R, Parani M. Inhibition of New Delhi Metallo-β-Lactamase 1 (NDM-1) Producing Escherichia coli IR-6 by Selected Plant Extracts and Their Synergistic Actions with Antibiotics. Front Microbiol 2017; 8:1580. [PMID: 28878746 PMCID: PMC5572277 DOI: 10.3389/fmicb.2017.01580] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 08/03/2017] [Indexed: 11/13/2022] Open
Abstract
Improper use of antibiotics has led to a great concern in the development of pathogenic microbial resistance. New Delhi metallo-β-lactamase 1 (NDM-1) producing bacteria are resistant to most of the β-lactam antibiotics, and so far, no new compounds have been clinically tested against these bacteria. In this study, ethanol extracts from the leaves of 240 medicinal plant species were screened for antibacterial activity against an NDM-1 Escherichia coli strain. The extracts that showed antibacterial activity were then tested for minimum inhibitory concentrations (MICs) and zones of inhibition. The extract from Combretum albidum G. Don, Hibiscus acetosella Welw. ex Hiern, Hibiscus cannabinus L., Hibiscus furcatus Willd., Punica granatum L., and Tamarindus indica L. showed bactericidal activity between 5 and 15 mg/ml and the MIC was between 2.56 and 5.12 mg/ml. All six plant extracts inhibited activity of the NDM-1 enzyme in vitro, and the IC50 value ranged between 0.50 and 1.2 ng/μl. Disruption of bacterial cell wall integrity by the plant extracts was clearly visible with scanning electron microscopy. Increases in membrane permeability caused 79.4–89.7% bacterial cell deaths as investigated by fluorescence-activated cell sorting. All the plant extracts showed synergistic effects when combined with colistin [fractional inhibitory concentration (ΣFIC) = 0.125–0.375], meropenem (ΣFIC = 0.09–0.313), and tetracycline (ΣFIC = 0.125–0.313). Thus, the plant extracts can be fractionated for the identification of active compounds, which could be used as new antibacterial compounds for the development of drugs against NDM-1 E. coli in addition to their use in combination therapy.
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Affiliation(s)
- Brinda Chandar
- Genomics Laboratory, Department of Genetic Engineering, School of Bioengineering, SRM UniversityKattankulathur, India
| | - Sundar Poovitha
- Genomics Laboratory, Department of Genetic Engineering, School of Bioengineering, SRM UniversityKattankulathur, India
| | - Kaliappan Ilango
- Interdisciplinary Institute of Indian System of Medicine, SRM UniversityKattankulathur, India
| | - Ramasamy MohanKumar
- Interdisciplinary Institute of Indian System of Medicine, SRM UniversityKattankulathur, India
| | - Madasamy Parani
- Genomics Laboratory, Department of Genetic Engineering, School of Bioengineering, SRM UniversityKattankulathur, India
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228
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Antimicrobial Activity of Some Essential Oils-Present Status and Future Perspectives. MEDICINES 2017; 4:medicines4030058. [PMID: 28930272 PMCID: PMC5622393 DOI: 10.3390/medicines4030058] [Citation(s) in RCA: 491] [Impact Index Per Article: 70.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Revised: 08/01/2017] [Accepted: 08/07/2017] [Indexed: 02/06/2023]
Abstract
Extensive documentation on the antimicrobial properties of essential oils and their constituents has been carried out by several workers. Although the mechanism of action of a few essential oil components has been elucidated in many pioneering works in the past, detailed knowledge of most of the compounds and their mechanism of action is still lacking. This knowledge is particularly important for the determination of the effect of essential oils on different microorganisms, how they work in combination with other antimicrobial compounds, and their interaction with food matrix components. Also, recent studies have demonstrated that nanoparticles (NPs) functionalized with essential oils have significant antimicrobial potential against multidrug- resistant pathogens due to an increase in chemical stability and solubility, decreased rapid evaporation and minimized degradation of active essential oil components. The application of encapsulated essential oils also supports their controlled and sustained release, which enhances their bioavailability and efficacy against multidrug-resistant pathogens. In the recent years, due to increasingly negative consumer perceptions of synthetic preservatives, interest in essential oils and their application in food preservation has been amplified. Moreover, the development of resistance to different antimicrobial agents by bacteria, fungi, viruses, parasites, etc. is a great challenge to the medical field for treating the infections caused by them, and hence, there is a pressing need to look for new and novel antimicrobials. To overcome these problems, nano-encapsulation of essential oils and exploiting the synergies between essential oils, constituents of essential oils, and antibiotics along with essential oils have been recommended as an answer to this problem. However, less is known about the interactions that lead to additive, synergistic, or antagonistic effects. A contributing role of this knowledge could be the design of new and more potent antimicrobial blends, and understanding of the interplay between the components of crude essential oils. This review is written with the purpose of giving an overview of current knowledge about the antimicrobial properties of essential oils and their mechanisms of action, components of essential oils, nano-encapsulated essential oils, and synergistic combinations of essential oils so as to find research areas that can facilitate applications of essential oils to overcome the problem of multidrug-resistant micro-organisms.
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229
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Evaluation of the antibacterial and modulatory potential of α-bisabolol, β-cyclodextrin and α-bisabolol/β-cyclodextrin complex. Biomed Pharmacother 2017. [DOI: 10.1016/j.biopha.2017.06.020] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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230
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Mokhtar M, Ginestra G, Youcefi F, Filocamo A, Bisignano C, Riazi A. Antimicrobial Activity of Selected Polyphenols and Capsaicinoids Identified in Pepper (Capsicum annuum L.) and Their Possible Mode of Interaction. Curr Microbiol 2017; 74:1253-1260. [PMID: 28721659 DOI: 10.1007/s00284-017-1310-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 07/13/2017] [Indexed: 01/09/2023]
Abstract
Antimicrobial activity of pepper polyphenols and capsaicinoids (Coumarin, caffeic acid, narangin, kaempferol, rutin, quercetin, capsaicin, and dihydrocapsaicin) against 13 pathogen bacteria and three beneficial strains was studied using the disk diffusion and microdilution methods. In general, phenolic compounds had the most important activity with the highest inhibition zones obtained with caffeic acid (3.5-20.5 mm), quercetin (4.75-3.5 mm), and kaempferol (7-14 mm). In the determination of the minimal inhibitory concentrations, the effects of both quercetin and kaempferol were more important than caffeic acid. The clinical strains Staphylococcus aureus (319, 14, 8, 32, and 550) were more sensitive to quercetin (0.00195-0.0078 mg L-1) whereas kaempferol was more active against the strains S. aureus (ATCC 6538, 26), S. typhimurium ATCC 13311, and Pseudomonas aeruginosa ATCC 27853 (0.0156-0.125 mg L-1). The interaction between these three polyphenols was studied against S. aureus ATCC 6538 and P. aeruginosa ATCC 27853. Different modes of interaction were observed (synergism, additive, and indifferent), but no antagonism was obtained. The best combination was quercetin and caffeic acid for S. aureus with fractional inhibitory concentration index (FICI) of 0.37, and kaempferol with quercetin for P. aeruginosa (FICI = 0.31).
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Affiliation(s)
- Meriem Mokhtar
- Laboratory of Beneficial Microorganisms, Functional Food and Health (LMBAFS), Faculty of Natural Sciences and Life, University of Abdelhamid Ibn Badis, 27000, Mostaganem, Algeria.
| | - Giovanna Ginestra
- Department of Chemical, Biological, Pharmacological and Environmental Science, University of Messina, Viale Annunziata, 98168, Messina, Italy
| | - Fatma Youcefi
- Laboratory of Beneficial Microorganisms, Functional Food and Health (LMBAFS), Faculty of Natural Sciences and Life, University of Abdelhamid Ibn Badis, 27000, Mostaganem, Algeria
| | - Angela Filocamo
- Department of Chemical, Biological, Pharmacological and Environmental Science, University of Messina, Viale Annunziata, 98168, Messina, Italy
| | - Carlo Bisignano
- Department of Chemical, Biological, Pharmacological and Environmental Science, University of Messina, Viale Annunziata, 98168, Messina, Italy
| | - Ali Riazi
- Laboratory of Beneficial Microorganisms, Functional Food and Health (LMBAFS), Faculty of Natural Sciences and Life, University of Abdelhamid Ibn Badis, 27000, Mostaganem, Algeria
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231
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Bellio P, Di Pietro L, Mancini A, Piovano M, Nicoletti M, Brisdelli F, Tondi D, Cendron L, Franceschini N, Amicosante G, Perilli M, Celenza G. SOS response in bacteria: Inhibitory activity of lichen secondary metabolites against Escherichia coli RecA protein. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2017; 29:11-18. [PMID: 28515022 DOI: 10.1016/j.phymed.2017.04.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 03/08/2017] [Accepted: 04/04/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND RecA is a bacterial multifunctional protein essential to genetic recombination, error-prone replicative bypass of DNA damages and regulation of SOS response. The activation of bacterial SOS response is directly related to the development of intrinsic and/or acquired resistance to antimicrobials. Although recent studies directed towards RecA inactivation via ATP binding inhibition described a variety of micromolar affinity ligands, inhibitors of the DNA binding site are still unknown. PURPOSE Twenty-seven secondary metabolites classified as anthraquinones, depsides, depsidones, dibenzofurans, diphenyl-butenolides, paraconic acids, pseudo-depsidones, triterpenes and xanthones, were investigated for their ability to inhibit RecA from Escherichia coli. They were isolated in various Chilean regions from 14 families and 19 genera of lichens. METHODS The ATP hydrolytic activity of RecA was quantified detecting the generation of free phosphate in solution. The percentage of inhibition was calculated fixing at 100µM the concentration of the compounds. Deeper investigations were reserved to those compounds showing an inhibition higher than 80%. To clarify the mechanism of inhibition, the semi-log plot of the percentage of inhibition vs. ATP and vs. ssDNA, was evaluated. RESULTS Only nine compounds showed a percentage of RecA inhibition higher than 80% (divaricatic, perlatolic, alpha-collatolic, lobaric, lichesterinic, protolichesterinic, epiphorellic acids, sphaerophorin and tumidulin). The half-inhibitory concentrations (IC50) calculated for these compounds were ranging from 14.2µM for protolichesterinic acid to 42.6µM for sphaerophorin. Investigations on the mechanism of inhibition showed that all compounds behaved as uncompetitive inhibitors for ATP binding site, with the exception of epiphorellic acid which clearly acted as non-competitive inhibitor of the ATP site. Further investigations demonstrated that epiphorellic acid competitively binds the ssDNA binding site. Kinetic data were confirmed by molecular modelling binding predictions which shows that epiphorellic acid is expected to bind the ssDNA site into the L2 loop of RecA protein. CONCLUSION In this paper the first RecA ssDNA binding site ligand is described. Our study sets epiphorellic acid as a promising hit for the development of more effective RecA inhibitors. In our drug discovery approach, natural products in general and lichen in particular, represent a successful source of active ligands and structural diversity.
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Affiliation(s)
- Pierangelo Bellio
- Department of Biotechnological and Applied Clinical Sciences, University of l'Aquila, Via Vetoio, 1, 67100 l'Aquila, Italy
| | - Letizia Di Pietro
- Department of Biotechnological and Applied Clinical Sciences, University of l'Aquila, Via Vetoio, 1, 67100 l'Aquila, Italy
| | - Alisia Mancini
- Department of Biotechnological and Applied Clinical Sciences, University of l'Aquila, Via Vetoio, 1, 67100 l'Aquila, Italy
| | - Marisa Piovano
- Department of Chemistry, Universidad Técnica Federico Santa María, Casilla 110 V, Valparaíso, 6, Chile
| | - Marcello Nicoletti
- Department of Environmental Biology, University Sapienza, P.le A. Moro, 00185, Rome, Italy
| | - Fabrizia Brisdelli
- Department of Biotechnological and Applied Clinical Sciences, University of l'Aquila, Via Vetoio, 1, 67100 l'Aquila, Italy
| | - Donatella Tondi
- Department of Life Sciences, University of Modena e Reggio Emilia, Via Campi 103, 41100, Modena, Italy
| | - Laura Cendron
- Department of Biology, University of Padova, Viale G. Colombo 3, 35131, Padova, Italy
| | - Nicola Franceschini
- Department of Biotechnological and Applied Clinical Sciences, University of l'Aquila, Via Vetoio, 1, 67100 l'Aquila, Italy
| | - Gianfranco Amicosante
- Department of Biotechnological and Applied Clinical Sciences, University of l'Aquila, Via Vetoio, 1, 67100 l'Aquila, Italy
| | - Mariagrazia Perilli
- Department of Biotechnological and Applied Clinical Sciences, University of l'Aquila, Via Vetoio, 1, 67100 l'Aquila, Italy
| | - Giuseppe Celenza
- Department of Biotechnological and Applied Clinical Sciences, University of l'Aquila, Via Vetoio, 1, 67100 l'Aquila, Italy.
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Himatanthus drasticus Leaves: Chemical Characterization and Evaluation of Their Antimicrobial, Antibiofilm, Antiproliferative Activities. Molecules 2017; 22:molecules22060910. [PMID: 28561790 PMCID: PMC6152732 DOI: 10.3390/molecules22060910] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 05/25/2017] [Accepted: 05/27/2017] [Indexed: 12/14/2022] Open
Abstract
Plant-derived products have played a fundamental role in the development of new therapeutic agents. This study aimed to analyze antimicrobial, antibiofilm, cytotoxicity and antiproliferative potentials of the extract and fractions from leaves of Himatanthusdrasticus, a plant from the Apocynaceae family. After harvesting, H. drasticus leaves were macerated and a hydroalcoholic extract (HDHE) and fractions were prepared. Antimicrobial tests, such as agar-diffusion, Minimum Inhibitory Concentration (MIC) and Minimal Bactericidal Concentration (MBC) were carried out against several bacterial species. Staphylococcus aureus, Pseudomonas aeruginosa, Listeria monocytogenes and Klebsiella pneumoniae were inhibited by at least one extract or fraction in the agar-diffusion assay (inhibition halos from 12 mm to 30 mm). However, the lowest MIC value was found for HDHE against K. pneumoniae. In addition, HDHE and its fractions were able to inhibit biofilm formation at sub-inhibitory concentrations (780 µg/mL and 1.56 µg/mL). As the best activities were found for HDHE, we selected it for further assays. HDHE was able to increase ciprofloxacin (CIP) activity against K. pneumoniae, displaying synergistic (initial concentration CIP + HDHE: 2 µg/mL + 600 µg/mL and 2.5 µg/mL + 500 µg/mL) and additive effects (CIP + HDHE: 3 µg/mL + 400 µg/mL). This action seems to be associated with the alteration in bacterial membrane permeability induced by HDHE (as seen by propidium iodide labeling). This extract was non-toxic for red blood cell or human peripheral blood mononuclear cells (PBMCs). Additionally, it inhibited the lipopolysaccharide-induced proliferation of PBMCs. The following compounds were detected in HDHE using HPLC-ESI-MS analysis: plumieride, plumericin or isoplumericin, rutin, quercetin and derivatives, and chlorogenic acid. Based on these results we suggest that compounds from H. drasticus have antimicrobial and antibiofilm activities against K. pneumoniae and display low cytotoxicity and anti-proliferative action in PBMC stimulated with lipopolysaccharide.
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233
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Commercial Essential Oils as Potential Antimicrobials to Treat Skin Diseases. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 2017:4517971. [PMID: 28546822 PMCID: PMC5435909 DOI: 10.1155/2017/4517971] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 10/09/2016] [Indexed: 01/22/2023]
Abstract
Essential oils are one of the most notorious natural products used for medical purposes. Combined with their popular use in dermatology, their availability, and the development of antimicrobial resistance, commercial essential oils are often an option for therapy. At least 90 essential oils can be identified as being recommended for dermatological use, with at least 1500 combinations. This review explores the fundamental knowledge available on the antimicrobial properties against pathogens responsible for dermatological infections and compares the scientific evidence to what is recommended for use in common layman's literature. Also included is a review of combinations with other essential oils and antimicrobials. The minimum inhibitory concentration dilution method is the preferred means of determining antimicrobial activity. While dermatological skin pathogens such as Staphylococcus aureus have been well studied, other pathogens such as Streptococcus pyogenes, Propionibacterium acnes, Haemophilus influenzae, and Brevibacterium species have been sorely neglected. Combination studies incorporating oil blends, as well as interactions with conventional antimicrobials, have shown that mostly synergy is reported. Very few viral studies of relevance to the skin have been made. Encouragement is made for further research into essential oil combinations with other essential oils, antimicrobials, and carrier oils.
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234
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Determination of anti-staphylococcal activity of thymoquinone in combinations with antibiotics by checkerboard method using EVA capmat™ as a vapor barrier. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2015.04.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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235
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Sadowska B, Budzyńska A, Stochmal A, Żuchowski J, Różalska B. Novel properties of Hippophae rhamnoides L. twig and leaf extracts - anti-virulence action and synergy with antifungals studied in vitro on Candida spp. model. Microb Pathog 2017; 107:372-379. [PMID: 28428132 DOI: 10.1016/j.micpath.2017.04.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 04/13/2017] [Accepted: 04/15/2017] [Indexed: 01/09/2023]
Abstract
Original, chemically characterized Sea buckthorn (SBT) twig and leaf extracts were in vitro studied in terms of anti-Candida activity. Minimum inhibitory concentrations (MICs) of the extracts against C. albicans ATCC 10231 ranged: 250 μg/ml (twig), 31.5 μg/ml (leaf), and against C. glabrata G1 (clinical isolate) - 15.6 μg/ml (twig), 3.9 μg/ml (leaf). Next the extracts have been used at their subMIC. Both extracts significantly enhanced activity of fluconazole (FLC) and caspofungin (CAS) against C. albicans and increased their efficacy against C. glabrata, measured by an agar dilution assay combined with the E-test. The extracts inhibited C. albicans morphogenesis such as germ tube and hyphae formation as well as invasion to the "Spider" Agar. Antiadhesive and anti-biofilm activities of the extracts were evaluated by Alamar Blue reduction assay. It showed not significant reduction in the degree of cell adhesion (by 10-15%) but noticeable decrease of biofilm formation (by 80% in the case of SBT-twig extract). In conclusion, this study provided the evidence that SBT extracts, used at non-cytotoxic concentrations for the fibroblasts (IC50 from 664.8 μg/ml to 1060.4 μg/ml), targeted some of Candida spp. virulence factors essential for the establishment of the infection. SBT twigs, previously regarded as waste material, were shown to be also a valuable source of the substances with promising antimicrobial activity.
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Affiliation(s)
- Beata Sadowska
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Lodz, Poland
| | - Aleksandra Budzyńska
- Laboratory of Microbiological and Technical Services, Faculty of Biology and Environmental Protection, University of Lodz, Poland
| | - Anna Stochmal
- Institute of Soil Science and Plant Cultivation, State Research Institute, Pulawy, Poland
| | - Jerzy Żuchowski
- Institute of Soil Science and Plant Cultivation, State Research Institute, Pulawy, Poland
| | - Barbara Różalska
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Lodz, Poland.
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de Lacerda Neto LJ, Ramos AGB, Kerntopf MR, Coutinho HDM, Quintans-Junior LJ, Almeida JRGS, Ribeiro-Filho J, Menezes IRA. Modulation of antibiotic activity by the hydroalcoholic extract from leaves of Caryocar coriaceum WITTM. Nat Prod Res 2017; 32:477-480. [PMID: 28391717 DOI: 10.1080/14786419.2017.1312396] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The aim of this study was to identify the presence of tannins, phenols and flavonoids on the hydroalcoholic extract of Caryocar coriaceum leaves (HECCL) and to determine the antioxidant and antibacterial activity of this extract. The extract was tested alone (1024-1 μg/mL) or associated (MIC/8) with several antibiotics in order to identify any antibacterial activity against multiresistant bacterial strains (Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa). The existence of tannins, total phenols (901.31 mg/g) and flavonoids (89.68 mg/g) was confirmed in the HECCL. The presence of rutin and quercetin were confirmed by Thin-layer chromatography (TLC). Using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method, the antioxidant activity of the extract (9 μg/mL) was determined. Moreover, the Minimum Inhibitory Concentration (MIC) value found for HECCL was 1024 μg/mL and the association between HECCL (MIC/8) with benzylpenicillin significantly changed its minimum inhibitory concentration from 2500 to 625 μg/mL against E. coli.
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Affiliation(s)
- Luís J de Lacerda Neto
- a Departamento de Química Biológica , Universidade Regional do Cariri - URCA , Crato , Brasil.,b Unidade Acadêmica Ciências da Vida , Universidade Federal de Campina Grande , Cajazeiras , Brasil
| | - A G B Ramos
- a Departamento de Química Biológica , Universidade Regional do Cariri - URCA , Crato , Brasil
| | - M R Kerntopf
- a Departamento de Química Biológica , Universidade Regional do Cariri - URCA , Crato , Brasil
| | - H D M Coutinho
- a Departamento de Química Biológica , Universidade Regional do Cariri - URCA , Crato , Brasil
| | - L J Quintans-Junior
- c Departamento de Fisiologia , Universidade Federal de Sergipe , São Cristovão , Brasil
| | - J R G S Almeida
- d Departamento de Ciências Farmacêuticas , Universidade Federal do Vale do São Francisco , Petrolina , Brasil
| | - J Ribeiro-Filho
- e Departamento de Biomedicina , Centro Universitário Dr. Leão Sampaio - UNILEAO , Juazeiro do Norte , Brasil
| | - I R A Menezes
- a Departamento de Química Biológica , Universidade Regional do Cariri - URCA , Crato , Brasil
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237
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Al Akeel R, Mateen A, Syed R, Alyousef AA, Shaik MR. Screening, Purification and Characterization of Anionic Antimicrobial Proteins from Foeniculum Vulgare. Molecules 2017; 22:molecules22040602. [PMID: 28397764 PMCID: PMC6154099 DOI: 10.3390/molecules22040602] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 04/05/2017] [Accepted: 04/06/2017] [Indexed: 11/29/2022] Open
Abstract
Foeniculum vulgare Mill., commonly called fennel, is a medicinal plant belonging to the Umbelliferae (Apiaceae) family, and is used in traditional medicine. Antibacterial peptides were isolated using sodium phosphate citrate buffer and, for extraction, cetyltrimethyl ammonium bromide (CTAB) buffer with pH 6, have been employed and antimicrobial activity tested against four reference strains. The extracted protein was subjected to 3 kDa dialysis and separation was carried out by DEAE-ion exchange chromatography and further proteins were identified by 2D gel electrophoresis. The results of Foeniculum vulgare elutes obtained from DEAE-ion exchange chromatography were tested for antibacterial activity. Elute 3 shows the highest antibacterial activity on Pseudomonas aeruginosa with a diameter of a zone of inhibition of 16 mm and IC50 value 25.02 (mcg/mL). Based on the findings of the wide usage in treatment of various ailments and day-to-day life, Foeniculum vulgare seeds were used in the present research and have shown promising antibacterial effects, which requires further proteomic research to authenticate the role of the anticipated proteins.
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Affiliation(s)
- Raid Al Akeel
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Ayesha Mateen
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Rabbani Syed
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Abdullah A Alyousef
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Mohammed Rafi Shaik
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
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Ramasamy M, Lee JH, Lee J. Development of gold nanoparticles coated with silica containing the antibiofilm drug cinnamaldehyde and their effects on pathogenic bacteria. Int J Nanomedicine 2017; 12:2813-2828. [PMID: 28435260 PMCID: PMC5388200 DOI: 10.2147/ijn.s132784] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Emerging resistance to antibiotics is a mounting worldwide health concern and increases the need for nonantibiotic strategies to combat infectious diseases caused by bacterial pathogens. In this study, the authors used the antibiofilm activity of the naturally occurring antimicrobial cinnamaldehyde (CNMA) conjugated to the surface of gold nanoparticles (GNPs) to deliver CNMA efficiently and eradicate biofilms of Gram-negative organisms (enterohemorrhagic Escherichia coli O157:H7, and Pseudomonas aeruginosa), Gram positive (methicillin-sensitive Staphylococcus aureus organisms, and methicillin-resistant Staphylococcus aureus) bacteria. CNMA-GNPs containing 0.005% (v/v) of CNMA were found to inhibit biofilm formation efficiently. The distributions of nanoparticles in biofilm cells and their biofilm disruption activities, including distorted cell morphology, were determined by transmission electron microscopy. In addition to their antibiofilm activities, CNMA-GNPs attenuated S. aureus virulence and protected Caenorhabditis elegans (C. elegans) worms. Here, the authors report the antibiofilm effects of CNMA-GNPs and suggest that they could be used to treat pathogenic bacterial infections in vivo.
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Affiliation(s)
| | - Jin-Hyung Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Republic of Korea
| | - Jintae Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Republic of Korea
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239
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Synergistic antimicrobial potential of essential oils in combination with nanoparticles: Emerging trends and future perspectives. Int J Pharm 2017; 519:67-78. [DOI: 10.1016/j.ijpharm.2017.01.013] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Revised: 01/05/2017] [Accepted: 01/06/2017] [Indexed: 01/29/2023]
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240
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Anand J, Rai N. Anticandidal synergistic activity of green tea catechins, antimycotics and copper sulphate as a mean of combinational drug therapy against candidiasis. J Mycol Med 2017; 27:33-45. [DOI: 10.1016/j.mycmed.2016.08.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 07/06/2016] [Accepted: 08/02/2016] [Indexed: 01/03/2023]
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241
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Sanhueza L, Melo R, Montero R, Maisey K, Mendoza L, Wilkens M. Synergistic interactions between phenolic compounds identified in grape pomace extract with antibiotics of different classes against Staphylococcus aureus and Escherichia coli. PLoS One 2017; 12:e0172273. [PMID: 28235054 PMCID: PMC5325233 DOI: 10.1371/journal.pone.0172273] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 02/02/2017] [Indexed: 11/18/2022] Open
Abstract
Synergy could be an effective strategy to potentiate and recover antibiotics nowadays useless in clinical treatments against multi-resistant bacteria. In this study, synergic interactions between antibiotics and grape pomace extract that contains high concentration of phenolic compounds were evaluated by the checkerboard method in clinical isolates of Staphylococcus aureus and Escherichia coli. To define which component of the extract is responsible for the synergic effect, phenolic compounds were identified by RP-HPLC and their relative abundance was determined. Combinations of extract with pure compounds identified there in were also evaluated. Results showed that the grape pomace extract combined with representatives of different classes of antibiotics as β-lactam, quinolone, fluoroquinolone, tetracycline and amphenicol act in synergy in all S. aureus and E. coli strains tested with FICI values varying from 0.031 to 0.155. The minimal inhibitory concentration (MIC) was reduced 4 to 75 times. The most abundant phenolic compounds identified in the extract were quercetin, gallic acid, protocatechuic acid and luteolin with relative abundance of 26.3, 24.4, 16.7 and 11.4%, respectively. All combinations of the extract with the components also showed synergy with FICI values varying from 0.031 to 0.5 and MIC reductions of 4 to 125 times with both bacteria strains. The relative abundance of phenolic compounds has no correlation with the obtained synergic effect, suggesting that the mechanism by which the synergic effect occurs is by a multi-objective action. It was also shown that combinations of grape pomace extract with antibiotics are not toxic for the HeLa cell line at concentrations in which the synergistic effect was observed (47 μg/mL of extract and 0.6-375 μg/mL antibiotics). Therefore, these combinations are good candidates for testing in animal models in order to enhance the effect of antibiotics of different classes and thus restore the currently unused clinical antibiotics due to the phenomenon of resistance. Moreover, the use of grape pomace is a good and low-cost alternative for this purpose being a waste residue of the wine industry.
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Affiliation(s)
- Loreto Sanhueza
- Núcleo de Química y Bioquímica, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
| | - Ricardo Melo
- Núcleo de Química y Bioquímica, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
| | - Ruth Montero
- Laboratorio de Inmunología Comparativa, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Kevin Maisey
- Laboratorio de Inmunología Comparativa, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Leonora Mendoza
- Laboratorio de Micología, Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Marcela Wilkens
- Laboratorio de Microbiología Básica y Aplicada, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
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242
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Blainski A, Gionco B, Oliveira AG, Andrade G, Scarminio IS, Silva DB, Lopes NP, Mello JCP. Antibacterial activity of Limonium brasiliense (Baicuru) against multidrug-resistant bacteria using a statistical mixture design. JOURNAL OF ETHNOPHARMACOLOGY 2017; 198:313-323. [PMID: 28089736 DOI: 10.1016/j.jep.2017.01.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 12/27/2016] [Accepted: 01/09/2017] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Limonium brasiliense (Boiss.) Kuntze (Plumbaginaceae) is commonly known as "baicuru" or "guaicuru" and preparations of its dried rhizomes have been popularly used in the treatment of premenstrual syndrome and menstrual disorder, and as an antiseptic in genito-urinary infections. This study evaluated the potential antibacterial activity of rhizome extracts against multidrug-resistant bacterial strains using statistical mixture design. MATERIALS AND METHODS The statistical design of four components (water, methanol, acetone, and ethanol) produced 15 different extracts and also a confirmatory experiment, which was performed using water:acetone (3:7, v/v). The crude extracts and their ethyl-acetate fractions were tested against vancomycin-resistant Enterococcus faecium (VREfm), methicillin-resistant Staphylococcus aureus (MRSA) and Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae, all of which have been implicated in hospital and community-acquired infections. The dry residue, total polyphenol, gallocatechin and epigallocatechin contents of the extracts were also tested and statistical analysis was applied in order to define the fit models to predict the result of each parameter for any mixture of components. The principal component and hierarchical clustering analyses (PCA and HCA) of chromatographic data, as well as mass spectrometry (MS) analysis were performanced to determine the main compounds present in the extracts. RESULTS The Gram-positive bacteria were susceptible to inhibition of bacterial growth, in special the ethyl-acetate fraction of ternary extracts from water:acetone:ethanol and methanol:acetone:ethanol against, respectively, VREfm (MIC=19µg/mL) and MRSA (MIC=39µg/mL). On the other hand, moderate activity of the ethyl-acetate fractions from primary (except water), secondary and ternary extracts (MIC=625µg/mL) was noted against KPC. The quadratic and special cubic models were significant for polyphenols and gallocatechin contents, respectively. Fit models to dry residue and epigallocatechin contents were not possible. PCA and HCA of the chromatographic fingerprints were disturbed by displacement retention time of some peaks, but the ultraviolet spectra indicated the homogeneous presence of flavan-3-ols characteristic of tannins. The MS confirmed the presence of gallic acid, gallocatechin, and epigallocatechin in extracts, and suggested the presence of monomers and dimers of B- and A-type prodelphinidins gallate, as well as a methyl gallate. CONCLUSION Our results showed the antibacterial potential of L. brasiliense extracts against multidrug-resistant Gram-positive bacteria, such as VREfm and MRSA. The statistical design was a important tool to evaluate the biological activity by optimized form. The presence of some phenolic compounds was also demonstrated in extracts.
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Affiliation(s)
- Andressa Blainski
- Programa de Pós-graduação em Ciências Farmacêuticas, Universidade Estadual de Maringá, Avenida Colombo, 5790, BR-87020-900 Maringá, PR, Brazil
| | - Barbara Gionco
- Laboratório de Ecologia Microbiana, Departamento de Microbiologia, Universidade Estadual de Londrina, PR, Brazil
| | - Admilton G Oliveira
- Laboratório de Ecologia Microbiana, Departamento de Microbiologia, Universidade Estadual de Londrina, PR, Brazil
| | - Galdino Andrade
- Laboratório de Ecologia Microbiana, Departamento de Microbiologia, Universidade Estadual de Londrina, PR, Brazil
| | - Ieda S Scarminio
- Laboratório de Quimiometria em Ciências Naturais, Departamento de Química, Universidade Estadual de Londrina, PR, Brazil
| | - Denise B Silva
- Laboratórios de Produtos Naturais e Espectrometria de Massas (LAPNEM), Universidade Federal de Mato Grosso do Sul, MS, Brazil
| | - Norberto P Lopes
- Núcleo de Pesquisa em Produtos Naturais e Sintéticos, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - João C P Mello
- Programa de Pós-graduação em Ciências Farmacêuticas, Universidade Estadual de Maringá, Avenida Colombo, 5790, BR-87020-900 Maringá, PR, Brazil.
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243
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Synergistic effects of three Moroccan thyme essential oils with antibiotic cefixime. ACTA ACUST UNITED AC 2017. [DOI: 10.1007/s10298-017-1107-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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244
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Tak JH, Isman MB. Penetration-enhancement underlies synergy of plant essential oil terpenoids as insecticides in the cabbage looper, Trichoplusia ni. Sci Rep 2017; 7:42432. [PMID: 28181580 PMCID: PMC5299433 DOI: 10.1038/srep42432] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 01/10/2017] [Indexed: 11/17/2022] Open
Abstract
Many plant essential oils and their terpenoid constituents possess bioactivities including insecticidal activity, and they sometimes act synergistically when mixed. Although several hypotheses for this have been proposed, the underlying mechanism has not been fully elucidated thus far. In the present study, we report that in larvae of the cabbage looper, Trichoplusia ni, most synergistic or antagonistic insecticidal activities among mixtures of plant essential oil constituents are pharmacokinetic effects, owing to changes in solubility as well as spreadability on a wax layer. Among the major constituents of rosemary (Rosmarinus officinalis) oil, in vitro analysis revealed up to a 19-fold increase in penetration of camphor in a binary mixture with 1,8-cineole through the larval integument, suggesting increased penetration as the major mechanism for synergy. A total of 138 synergistic or antagonistic interactions among 39 compounds were identified in binary mixtures via topical application, and these were highly correlated to changes in surface tension as measured by contact angle of the mixtures on a beeswax layer. Among compounds tested, trans-anethole alone showed evidence of internal synergy, whereas most of remaining synergistic or antagonistic combinations among the three most active compounds were identified as penetration-related interactions, confirmed via a divided-application bioassay.
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Affiliation(s)
- Jun-Hyung Tak
- Faculty of Land and Food Systems, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
| | - Murray B. Isman
- Faculty of Land and Food Systems, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
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Talei GR, Mohammadi M, Bahmani M, Kopaei MR. Synergistic effect of Carum copticum and Mentha piperita essential oils with ciprofloxacin, vancomycin, and gentamicin on Gram-negative and Gram-positive bacteria. Int J Pharm Investig 2017; 7:82-87. [PMID: 28929050 PMCID: PMC5553268 DOI: 10.4103/jphi.jphi_12_17] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: Infectious diseases have always been an important health issue in human communities. In the recent years, much research has been conducted on antimicrobial effects of nature-based compounds because of increased prevalence of antibiotic resistance. The present study was conducted to investigate synergistic effect of Carum copticum and Mentha piperita essential oils with ciprofloxacin, vancomycin, and gentamicin on Gram-negative and Gram-positive bacteria. Materials and Methods: In this experimental study, the synergistic effects of C. copticum and M. piperita essential oils with antibiotics on Staphylococcus aureus (ATCC 25923), Enterococcus faecalis (ATCC 29212), Escherichia coli (ATCC 8739), Pseudomonas aeruginosa (ATCC 9027), Staphylococcus epidermidis (ATCC 14990), and Listeria monocytogenes (ATCC 7644) were studied according to broth microdilution and the MIC and fractional inhibitory concentration (FIC) of these two essential oils determined. Results: C. copticum essential oil at 30 μg/ml could inhibit S. aureus, and in combination with vancomycin, decreased MIC from 0.5 to 0.12 μg/ml. Moreover, the FIC was derived 0.24 μg/ml which represents a potent synergistic effect with vancomycin against S. aureus growth. C. copticum essential oil alone or combined with other antibiotics is effective in treating bacterial infections. Conclusions: In addition, C. copticum essential oil can strengthen the activities of certain antibiotics, which makes it possible to use this essential oil, especially in drug resistance or to lower dosage or toxicity of the drugs.
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Affiliation(s)
- Gholam-Reza Talei
- Department of Microbiology, Razi Herbal Medicine Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Mohsen Mohammadi
- Department of Microbiology, Razi Herbal Medicine Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Mahmoud Bahmani
- Department of Microbiology, Leishmaniasis Research Center, Ilam University of Medical Sciences, Ilam, Iran
| | - Mahmoud Rafieian Kopaei
- Department of Pharmacology, Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
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Abstract
The emergence and rapid development of seriously drug-resistant pathogens have created the greatest danger to public health and made the treatment of infectious diseases ineffective; to control the antibiotic-resistant microbes, the discovery of new effective antibacterials with new mechanisms of action against bacteria remains an urgent task to control the bacterial resistance. The paucity of infections in wild plants supports the role of innate defense system of plants. Many researchers nominate the natural extracts to act against bacterial resistance mechanisms, and the majority of them have now been focused on the combination of plant extracts and antibiotics to define the availability of resistance modification agents. Only very few numbers of natural products are successful to reach experiments circle beyond the in vitro assays. Phenols and phenolic acids could serve as good candidates to the natural antibacterial arsenal. The pyrogallol-based compounds are more potent than others such as catechol or resorcinol, gallic acid, and the hydroxycinnamic acid (ferulic acid) are destructing the bacterial cell wall of Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa, leading to leakage of cellular contents. These compounds have stronger activity against Gram-positive microorganisms, and some of them showed good synergism with antibiotics, for example, pentagalloylglucopyranose, is shown a synergism with penicillin G against methicillin-resistant S. aureus, another example is the interesting synergism between epicatechin gallate and oxacillin where the minimal inhibitory concentrations of oxacillin reduced around 500 times by the addition of epicatechin gallate to the antibiotic.
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Affiliation(s)
- Omar A Aldulaimi
- Department of Pharmacognosy and Medicinal Plants, College of Pharmacy, Al-Mustansiriyah University, Baghdad, Iraq
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Zuo GY, Wang CJ, Han J, Li YQ, Wang GC. Synergism of coumarins from the Chinese drug Zanthoxylum nitidum with antibacterial agents against methicillin-resistant Staphylococcus aureus (MRSA). PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2016; 23:1814-1820. [PMID: 27912884 DOI: 10.1016/j.phymed.2016.11.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 10/28/2016] [Accepted: 11/03/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Methicillin-resistant Staphylococcus aureus (MRSA) poses a serious therapeutic challenge in current clinic and new drug development. Natural coumarins have diverse bioactivities and the potential of resistance modifying effects. PURPOSE This study is to present in-depth evaluations of in vitro antimicrobial activities of four natural coumarins 5-geranyloxy-7-methoxycoumarin (Gm, 1), (5,7-dimethoxy-8-prenyloxycoumarin (artanin, Ar, 2)), isopimpinellin (Is, 3) and phellopterin (Ph, 4) from Zanthoxylum nitidum (Roxb.) DC. (Rutaceae) extracts, focusing on their potential restoration the activity of conventional antibacterial agents against clinical MRSA strains. METHODS Bioactivity-guided fractionation and spectral analyses were used to isolate the coumarins and identify the structures, respectively. The double broth microdilution method was used to assay the coumarins' alone activity. The classic checkerboard microdilution and dynamic time-killing methods were used to evaluate combinatory effects. RESULTS The four plant coumarins Gm (1), Ar (2), Is (3) and Ph (4) were isolated and identified from Z. nitidum extracts. Coumarins 1-4 displayed promising inhibition against both MSSA and MRSA with minimal inhibitory concentrations (MICs) of 8-64µg/ml, but very weak against Gram-negative pathogen and yeast with MICs of 256 to ≥1024µg/ml. The geranyloxy and prenyloxy substitutions showed to be more active than the methoxy substitution on the coumarin skeletons. 1-4 also showing different extent of synergism with a total of eight conventional antibacterial agents, i.e. chloramphenicol (CL), gentamicin (CN), fosfomycin (FF), levofloxacin (LE), minocycline (MI), piperacillin/tazobactam (P/T), teicoplanin (TE) and vancomycin (VA) against ten clinical MRSA strains. Four to ten of the tested MRSA strains showed bacteriostatic synergy in the eleven combinations. The anti-MRSA modifying effects were related to different arrangement in the combinations with fractional inhibitory concentration indices (FICIs) from 0.187 to 1.125 and the three combinations CN (Is), CL (Ph) and MI (Gm) were the best ones. The enhancement of activity was also shown by 2-64 of dose reduction indices (DRIs) of the combined MICs, with VA (Ph) combination resulted the biggest DRI. The resistance of MRSA to antibacterial agents could be reversed in the combinations of CL (Gm or Ph), LE (Ph) and MI (Is) following the Clinical and Laboratory Standards Institute (CLSI) criteria. Six combinations P/T (Gm), TE (Ar), CN (Is), VA (Ph) and CL (Gm or Ph) also showed bactericidal synergy with Δlog10CFU/ml >2 at 24h incubation. CONCLUSIONS The coumarins showed high potentiating effects of the antibacterial agents against multi-drug resistant SA. The resistance reversal effect of CL, LE and MI warrants further pharmacological investigation on combinatory therapy for the sake of fighting against MRSA infections.
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Affiliation(s)
- Guo-Ying Zuo
- Research Center for Natural Medicines, Kunming General Hospital of Chengdu Military Command, Kunming 650032, China.
| | - Chun-Juan Wang
- Research Center for Natural Medicines, Kunming General Hospital of Chengdu Military Command, Kunming 650032, China; School of Pharmacy, Kunming Medical University, Kunming 550004, China
| | - Jun Han
- School of Basic Medical Sciences, Yunnan Traditional Chinese Medical College, Kunming 650500, China.
| | - Yu-Qing Li
- School of Basic Medical Sciences, Yunnan Traditional Chinese Medical College, Kunming 650500, China
| | - Gen-Chun Wang
- Research Center for Natural Medicines, Kunming General Hospital of Chengdu Military Command, Kunming 650032, China
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Lu M, Li T, Wan J, Li X, Yuan L, Sun S. Antifungal effects of phytocompounds on Candida species alone and in combination with fluconazole. Int J Antimicrob Agents 2016; 49:125-136. [PMID: 28040409 DOI: 10.1016/j.ijantimicag.2016.10.021] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 09/14/2016] [Accepted: 10/14/2016] [Indexed: 12/14/2022]
Abstract
Invasive fungal infections caused by Candida spp. remain the most predominant nosocomial fungal infections. Owing to the increased use of antifungal agents, resistance of Candida spp. to antimycotics has emerged frequently, especially to fluconazole (FLC). To cope with this issue, new efforts have been dedicated to discovering novel antimycotics or new agents that can enhance the susceptibility of Candida spp. to existing antimycotics. The secondary metabolites of plants represent a large library of compounds that are important sources for new drugs or compounds suitable for further modification. Research on the anti-Candida activities of phytocompounds has been carried out in recent years and the results showed that a series of phytocompounds have anti-Candida properties, such as phenylpropanoids, flavonoids, terpenoids and alkaloids. Among these phytocompounds, some displayed potent antifungal activity, with minimum inhibitory concentrations (MICs) of ≤8 µg/mL, and several compounds were even more effective against drug-resistant Candida spp. than FLC or itraconazole (e.g. honokiol, magnolol and shikonin). Interestingly, quite a few phytocompounds not only displayed anti-Candida activity alone but also synergised with FLC against Candida spp., even leading to a reversal of FLC resistance. This review focuses on summarising the anti-Candida activities of phytocompounds as well as the interactions of phytocompounds with FLC. In addition, we briefly overview the synergistic mechanisms and present the structure of the antimycotic phytocompounds. Hopefully, this analysis will provide insight into antifungal agent discovery and new approaches against antifungal drug resistance.
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Affiliation(s)
- Mengjiao Lu
- School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province 250012, China
| | - Tao Li
- Intensive Care Unit, Qianfoshan Hospital affiliated to Shandong University, Jinan, Shandong Province 250014, China
| | - Jianjian Wan
- Department of Respiratory, Yucheng People's Hospital, Yucheng, Shandong Province 251200, China
| | - Xiuyun Li
- School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province 250012, China
| | - Lei Yuan
- Department of Pharmacy, Baodi District People's Hospital, Tianjin 301800, China
| | - Shujuan Sun
- Department of Pharmacy, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong Province 250014, China.
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Himratul-Aznita WH, Nor-Zulaila CO, Nurul-Fatihah K. Antifungal activity of dual combination of hydroxychavicol with commercialized agents against oral Candida species. SPRINGERPLUS 2016; 5:1696. [PMID: 27757368 PMCID: PMC5047859 DOI: 10.1186/s40064-016-3396-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 09/27/2016] [Indexed: 11/10/2022]
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250
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Albano M, Alves FCB, Andrade BFMT, Barbosa LN, Pereira AFM, Cunha MDLRDSD, Rall VLM, Fernandes Júnior A. Antibacterial and anti-staphylococcal enterotoxin activities of phenolic compounds. INNOV FOOD SCI EMERG 2016. [DOI: 10.1016/j.ifset.2016.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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