1
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Said G, Ali A, Ahmad L. Design, semi-synthesis of soft coral-derived Aspergillus sp. secondary metabolite geodin derivatives and their antibacterial activities. Nat Prod Res 2024:1-9. [PMID: 38462767 DOI: 10.1080/14786419.2024.2326990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 02/27/2024] [Indexed: 03/12/2024]
Abstract
A series of novel ester derivatives 2 - 7, of natural product geodin 1, isolated from the soft coral-derived fungus Aspergillus sp., were designed and semi-synthesised through one step reaction with high yield. Compound 5 showed strong antifouling inhibitory activities with MIC of 4.80 μM while compound 4 showed selective inhibitory activities with MICs values 8.59 μM against Aeromonas salmonicida and Pseudomonas aeruginosa (Sea-Nine 211, MIC = 0.27 μM). Compounds 3, 4 and 6 showed potent anti-pathogenic inhibitory activities with MICs of 2.29 μM, 4.29 μM and 4.56 μM respectively against Staphylococcus aureus (Ciprofloxacin, MIC = 0.156 μM). Compound 2 showed weak inhibitory activity against A. salmonicida with MIC 18.75 μM (Sea-Nine 211, MIC = 0.27 μM) and with MICs 9.38 μM against S. aureus (ciprofloxacin, MIC = 0.156 μM). However, compound 7 showed very low antibacterial activities with MIC = >20 μM. The preliminary structure-activity relationships of compounds 2 - 7 further prove that the modification of 4-OH group of natural product geodin 1 improves the antibacterial activities such as antifouling and anti-pathogenic activities.
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Affiliation(s)
- Gulab Said
- Department of Chemistry, Women University Swabi, Swabi, Pakistan
| | - Amjad Ali
- Center of Excellence in Marine Biology, University of Karachi, Karachi, Pakistan
| | - Latif Ahmad
- Department of Botany, Women University Swabi, Swabi, Pakistan
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2
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Huang L, Li Y, Pang J, Lv L, Zhou J, Liang L, He X, Li J, Xu W, Yang R. Isolation and Characterization of Antimicrobial Metabolites from the Sophora tonkinensis-Associated Fungus Penicillium sp. GDGJ-N37. Molecules 2024; 29:348. [PMID: 38257261 PMCID: PMC10818566 DOI: 10.3390/molecules29020348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/03/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Chemical investigation of Penicillium sp. GDGJ-N37, a Sophora tonkinensis-associated fungus, yielded two new azaphilone derivatives, N-isoamylsclerotiorinamine (1) and 7-methoxyl-N-isoamylsclerotiorinamine (2), and four known azaphilones (3-6), together with two new chromone derivatives, penithochromones X and Y (7 and 8). Their structures were elucidated based on spectroscopic data, CD spectrum, and semi-synthesis. Sclerotioramine (3) showed significant antibacterial activities against B. subtilis and S. dysentery, and it also showed most potent anti-plant pathogenic fungi activities against P. theae, C. miyabeanus, and E. turcicum.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Weifeng Xu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China; (L.H.); (Y.L.); (J.P.); (L.L.); (J.Z.); (L.L.); (X.H.); (J.L.)
| | - Ruiyun Yang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China; (L.H.); (Y.L.); (J.P.); (L.L.); (J.Z.); (L.L.); (X.H.); (J.L.)
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3
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Said G, Ali A, Umair M, Ahmad F, Gul S, Ateeq M. Bioactivities of natural product geodin congeners and their preliminary structure activity relationship. Nat Prod Res 2023:1-10. [PMID: 37865972 DOI: 10.1080/14786419.2023.2272022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 10/07/2023] [Indexed: 10/24/2023]
Abstract
A series of 6 novel ester derivatives 2-7 of natural product geodin 1 were designed and semi-synthesized through one mild step reaction with high yield. Compounds 2-7 showed strong inhibitory activities against Staphylococcus aureus in the range of 2.35-9.41 μM. Compounds 4 and 7 showed very strong inhibitory activities against antifouling bacteria Aeromonas salmonicida with MICs of 2.42 μM and 4.56 μM respectively. Most notably compounds 3-7 showed potent antifungal activities against Candida albicans in the range of 0.59-2.44 μM. Particularly, compound 3 showed the highest antifungal activity against C. albicans with a MIC value of 0.59 μM. The preliminary structure activity relationship of these derivatives showed that replacement of 4-OH group with benzoyl substituents could enhance the antibacterial and antifungal activities of geodin 1.
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Affiliation(s)
- Gulab Said
- Department of Chemistry, Women University Swabi, Swabi, Pakistan
| | - Amjad Ali
- Center of Excellence in Marine Biology, University of Karachi, Karachi, Pakistan
| | - Muhammad Umair
- Medical Genomics Research Department, King Abdullah International Medical Research Centre, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Farooq Ahmad
- Department of Biochemistry, Women University Swabi, Swabi, Pakistan
| | - Salma Gul
- Department of Chemistry, Women University Swabi, Swabi, Pakistan
| | - Muhammad Ateeq
- Department of Chemistry, Abdul Wali Khan University, Mardan, Pakistan
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4
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Chao R, Said G, Zhang Q, Qi YX, Hu J, Zheng CJ, Zheng JY, Shao CL, Chen GY, Wei MY. Design, Semisynthesis, Insecticidal and Antibacterial Activities of a Series of Marine-Derived Geodin Derivatives and Their Preliminary Structure-Activity Relationships. Mar Drugs 2022; 20:82. [PMID: 35200612 PMCID: PMC8880215 DOI: 10.3390/md20020082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/15/2022] [Accepted: 01/15/2022] [Indexed: 02/06/2023] Open
Abstract
To enhance the biological activity of the natural product geodin (1), isolated from the marine-derived fungus Aspergillus sp., a series of new ether derivatives (2-37) was designed and semisynthesized using a high-yielding one-step reaction. In addition, the insecticidal and antibacterial activities of all geodin congeners were evaluated systematically. Most of these derivatives showed better insecticidal activities against Helicoverpa armigera Hübner than 1. In particular, 15 showed potent insecticidal activity with an IC50 value of 89 μM, comparable to the positive control azadirachtin (IC50 = 70 μM). Additionally, 5, 12, 13, 16, 30 and 33 showed strong antibacterial activity against Staphylococcus aureus and Aeromonas salmonicida with MIC values in the range of 1.15-4.93 μM. The preliminary structure-activity relationships indicated that the introduction of halogenated benzyl especially fluorobenzyl, into 1 and substitution of 4-OH could be key factors in increasing the insecticidal and antibacterial activities of geodin.
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Affiliation(s)
- Rong Chao
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (R.C.); (G.S.); (Q.Z.); (J.H.); (C.-L.S.)
| | - Gulab Said
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (R.C.); (G.S.); (Q.Z.); (J.H.); (C.-L.S.)
- Department of Chemistry, Women University Swabi, Swabi 23430, Pakistan
| | - Qun Zhang
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (R.C.); (G.S.); (Q.Z.); (J.H.); (C.-L.S.)
| | - Yue-Xuan Qi
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266061, China;
| | - Jie Hu
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (R.C.); (G.S.); (Q.Z.); (J.H.); (C.-L.S.)
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266061, China;
| | - Cai-Juan Zheng
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou 570100, China; (C.-J.Z.); (G.-Y.C.)
| | - Ji-Yong Zheng
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266061, China;
| | - Chang-Lun Shao
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (R.C.); (G.S.); (Q.Z.); (J.H.); (C.-L.S.)
- Department of Chemistry, Women University Swabi, Swabi 23430, Pakistan
| | - Guang-Ying Chen
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou 570100, China; (C.-J.Z.); (G.-Y.C.)
| | - Mei-Yan Wei
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (R.C.); (G.S.); (Q.Z.); (J.H.); (C.-L.S.)
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
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5
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de Sousa ESO, Pinheiro SB, Cortez ACA, Cruz KS, de Souza ÉS, Melhem MDSC, Frickmann H, de Souza JVB. Modifications of antifungal sensibility testing as suggested by CLSI document M27-A4: proposal for using different culture medium and buffer. Diagn Microbiol Infect Dis 2021; 101:115488. [PMID: 34461499 DOI: 10.1016/j.diagmicrobio.2021.115488] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/05/2021] [Accepted: 07/07/2021] [Indexed: 11/24/2022]
Abstract
A common strategy in antifungal susceptibility testing is the utilization of the standardized protocol based on the microbroth dilution assay approach as described by the Clinical Laboratory Standards Institute (CLSI) (M27-A4). One major problem for laboratories in resource-limited countries with this protocol arises from the use of expensive culture media like RPMI-1640 and 3-N-morpholinopropanesulfonic acid (MOPS) buffer. One approach of circumventing this problem in cases of economic need is the evaluation of alternative culture media and buffers. The overall goal of this work was to investigate the influence of modifications in the protocol M27-A4 on diagnostic reliability. We performed univariate analyses evaluating (1) 2 different culture media (YNB and modified SAB); (2) three different buffers (sodium bicarbonate, Tris-HCL, and phosphate), as well as the influence of inoculum concentration (102, 103, 104, 105 cells/mL), the influence of incubation time, and the influence of the assessment mode (visual, biological dye, and spectrophotometer). Our results suggested that (1) RPMI-1640 may be substituted by modified SAB and (2) MOPS buffer may be substituted by Tris-HCl buffer for defined analyses. By comparing the CLSI protocol and the alternative protocol proposed in the present study (modified SAB and Tris-HCl buffer) for the assessment of fluconazole susceptibility of eighteen yeasts (clinical isolates), similar results with both methodologies were recorded. We feel that this study should stimulate a discussion on the feasibility and evolution of the M27-A4 protocol in order to include pragmatic alternatives for resource-limited settings.
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Affiliation(s)
| | - Silviane Bezerra Pinheiro
- Programa de Pós-graduação em Ciências Farmacêuticas - Universidade Federal do Amazonas - UFAM, Amazonas, Brasil
| | - Ana Cláudia Alves Cortez
- Departamento de Microbiologia Médica, Instituto Nacional de Pesquisa da Amazônia - INPA. Av. André Araújo, Amazonas, Brasil
| | - Kátia Santana Cruz
- Fundação de Medicina Tropical Doutor Heitor Vieira Dourado - AM, Manaus, Amazonas, Brasil
| | | | - Marcia de Souza Carvalho Melhem
- The School of Medicine, Federal University of Mato Grosso do Sul, Campo Grande, Brazil; Departamento de Micologia, Instituto Adolfo Lutz. Av. Dr Arnaldo, São Paulo, Brasil
| | - Hagen Frickmann
- Department of Microbiology and Hospital Hygiene, Bundeswehr Hospital Hamburg, Hamburg, Germany; Institute for Medical Microbiology, Virology and Hygiene, University Medicine Rostock, Rostock, Germany
| | - João Vicente Braga de Souza
- Departamento de Microbiologia Médica, Instituto Nacional de Pesquisa da Amazônia - INPA. Av. André Araújo, Amazonas, Brasil.
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6
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Affiliation(s)
- M.A. Ghannoum
- University Center for Medical Mycology, and Mycology Reference Laboratory, Department of Dermatology, University Hospitals of Cleveland, and Case Western Reserve University, Cleveland, Ohio 44106-5028, USA. Phone , Fax. , Electronic mail address:
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7
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de Sousa ESO, Cortez ACA, de Souza Carvalho Melhem M, Frickmann H, de Souza JVB. Factors influencing susceptibility testing of antifungal drugs: a critical review of document M27-A4 from the Clinical and Laboratory Standards Institute (CLSI). Braz J Microbiol 2020; 51:1791-1800. [PMID: 32757139 DOI: 10.1007/s42770-020-00354-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 07/29/2020] [Indexed: 12/24/2022] Open
Abstract
Due to the increasing numbers of fungal infections and the emergence of drug-resistant fungi, optimization and standardization of diagnostic methods for the measurement of antifungal susceptibility are ongoing. The M27-A4 document by the US Clinical and Laboratory Standards Institute (CLSI) is presently used for the interpretation of minimum inhibitory concentrations of major opportunistic yeast species as measured by broth microdilution testing in many countries. Although microdilution is considered a benchmark for reproducible and accurate results, increased testing capacity, and limited human bias, the method is often inaccessible to routine clinical laboratories and researchers, especially in low-income countries. Furthermore, several studies suggest that there are still a considerable number of factors that make the estimation of in vitro activity of antifungal agents challenging. This review article summarizes the limitations of the M27-A4 standard which, despite the advances and improvements obtained by the standardization of antimicrobial resistance testing methods by CLSI, still persist.
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Affiliation(s)
| | - Ana Claúdia Alves Cortez
- Department of Medical Microbiology, National Institute for Amazonian Research - INPA, André Araújo Avenue, Manaus, Amazonas, Brazil
| | - Marcia de Souza Carvalho Melhem
- Department of Mycology, Adolfo Lutz Institute, Av. Dr. Arnaldo, Sao Paulo, Brazil
- School of Medicine, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Hagen Frickmann
- Department of Tropical Medicine at the Bernhard Nocht Institute, German Armed Forces Hospital of Hamburg, Hamburg, Germany, Institute for Medical Microbiology, Virology and Hygiene, University Medicine Rostock, Rostock, Germany
| | - João Vicente Braga de Souza
- Department of Medical Microbiology, National Institute for Amazonian Research - INPA, André Araújo Avenue, Manaus, Amazonas, Brazil.
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8
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Gao Y, Zhan P, Hagen F, Menken SBJ, Sun J, Rezaei-Matehkolaei A, de Hoog S. Molecular epidemiology and in vitro antifungal susceptibility of Trichophyton schoenleinii, agent of tinea capitis favosa. Mycoses 2019; 62:466-474. [PMID: 30597639 DOI: 10.1111/myc.12889] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 12/11/2018] [Accepted: 12/27/2018] [Indexed: 11/29/2022]
Abstract
Trichophyton schoenleinii is an anthropophilic dermatophyte usually causing tinea favosa. Only few studies have provided data on molecular epidemiology and antifungal profiles of this fungus due to its limited prevalence after 1950s. Forty-nine strains from Asia (n = 27), Africa (n = 10), Europe (n = 10) and from unknown regions (n = 2) were analysed with amplified fragment length polymorphism fingerprinting (AFLP) to reveal intraspecific genetic diversity in this dataset. Amplified fragment length polymorphism fingerprinting genotyping revealed five clusters which did not correspond to geographic origins or clinical characteristics. Additionally, in vitro antifungal susceptibility to seven antifungals was provided for all strains. Terbinafine, ketoconazole, miconazole and itraconazole proved to be the most effective drugs, followed by griseofulvin. No correlation between genotypes and differences in antifungal susceptibility was observed. It is concluded that the AFLP groups are lineages within a single species.
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Affiliation(s)
- Yangmin Gao
- Dermatology Hospital of Jiangxi Province, Jiangxi Provincial Institute of Dermatology, Nanchang, China
| | - Ping Zhan
- Dermatology Hospital of Jiangxi Province, Jiangxi Provincial Institute of Dermatology, Nanchang, China.,Jiangxi Provincial People's Hospital, Nanchang, China.,Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands.,Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
| | - Ferry Hagen
- Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands
| | - Steph B J Menken
- Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
| | - Jiufeng Sun
- Guangdong Provincial Center for Disease Control and Prevention, Institute of Microbiology, Guangzhou, China
| | - Ali Rezaei-Matehkolaei
- Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Sybren de Hoog
- Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands.,Center of Expertise in Mycology of RadboudUMC, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
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9
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Zhang XQ, Mou XF, Mao N, Hao JJ, Liu M, Zheng JY, Wang CY, Gu YC, Shao CL. Design, semisynthesis, α-glucosidase inhibitory, cytotoxic, and antibacterial activities of p-terphenyl derivatives. Eur J Med Chem 2018; 146:232-244. [PMID: 29407953 DOI: 10.1016/j.ejmech.2018.01.057] [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: 10/27/2017] [Revised: 01/02/2018] [Accepted: 01/18/2018] [Indexed: 01/27/2023]
Abstract
Terphenyllin (1), a naturally abundant p-terphenyl metabolite, was isolated from the coral derived fungus Aspergillus candidus together with four natural analogues 2-5. To evaluate their potency and selectivity, a series of new derivatives of 1 were designed and semisynthesized. They were evaluated for their α-glucosidase inhibitory, cytotoxic, and antibacterial activities. Compounds 1, 3, 4, 7, 8, 10, 11, 14, 15, 21, 23, 24, 29, 39, and 40 showed significant α-glucosidase inhibitory activity with IC50 values of 4.79-15 μM, which were stronger than that of the positive controls, 1-deoxynojirimycin (IC50 = 192.0 μM) and acarbose (IC50 = 707.9 μM). Compounds 7 and 10 have relatively higher therapeutic indices (CC50/IC50 = 17 and 10, respectively), representing potential promising leads. The enzyme kinetic studies of compounds 1 and 24 showed a non-competitive inhibition on α-glucosidase with Ki values of 1.50 and 3.45 μM, respectively. Additionally, compounds 14, 21, 26, 29, 32, 35, and 37 were found to exhibit strong cytotoxicity against three tumor cell lines A549 (lung adenocarcinoma epithelial), HeLa (cervical carcinoma), and HepG2 (hepatocellular liver carcinoma) with IC50 values ranging from 0.15 to 5.26 μM. Further study indicated that 32 could induce S-phase arrest in the cell cycle progression.
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Affiliation(s)
- Xue-Qing Zhang
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266200, People's Republic of China; State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266061, People's Republic of China
| | - Xiao-Feng Mou
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266200, People's Republic of China
| | - Ning Mao
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266200, People's Republic of China
| | - Jie-Jie Hao
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266200, People's Republic of China
| | - Ming Liu
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266200, People's Republic of China
| | - Ji-Yong Zheng
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266061, People's Republic of China
| | - Chang-Yun Wang
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266200, People's Republic of China
| | - Yu-Cheng Gu
- Syngenta Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, United Kingdom
| | - Chang-Lun Shao
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266200, People's Republic of China; State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266061, People's Republic of China.
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10
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Gill RK, Singh H, Raj T, Sharma A, Singh G, Bariwal J. 4-Substituted thieno[2,3-d
]pyrimidines as potent antibacterial agents: Rational design, microwave-assisted synthesis, biological evaluation and molecular docking studies. Chem Biol Drug Des 2017; 90:1115-1121. [DOI: 10.1111/cbdd.13028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 04/27/2017] [Accepted: 05/01/2017] [Indexed: 01/24/2023]
Affiliation(s)
- Rupinder K. Gill
- Department of Pharmaceutical Chemistry; ISF College of Pharmacy; Moga Punjab India
- I. K. Gujral Punjab Technical University; Kapurthala, Jalandhar Punjab India
| | - Harpreet Singh
- Department of Chemistry; Guru Nanak Dev University; Amritsar India
| | - Tilak Raj
- Toxicology Division; Forensic Science Laboratory, Phase-IV; Mohali Punjab India
| | - Anuradha Sharma
- University Institute of Pharmaceutical Sciences; Panjab University; Chandigarh India
| | - Gagandeep Singh
- Bioorganic and Photochemistry Laboratory; Department of Pharmaceutical Sciences; Guru Nanak Dev University; Amritsar Punjab India
| | - Jitender Bariwal
- Department of Pharmaceutical Chemistry; ISF College of Pharmacy; Moga Punjab India
- Shiva Institute of B. Pharmacy; Chandpur, Bilaspur Himachal Pradesh India
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11
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Supramolecular Chitosan Micro-Platelets Synergistically Enhance Anti-Candida albicans Activity of Amphotericin B Using an Immunocompetent Murine Model. Pharm Res 2017; 34:1067-1082. [DOI: 10.1007/s11095-017-2117-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 02/01/2017] [Indexed: 10/20/2022]
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12
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A New Griseofulvin Derivative from the Marine-Derived Arthrinium sp. Fungus and Its Biological Activity. Chem Nat Compd 2016. [DOI: 10.1007/s10600-016-1849-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Chen M, Wu XD, Zhao Q, Wang CY. Topsensterols A-C, Cytotoxic Polyhydroxylated Sterol Derivatives from a Marine Sponge Topsentia sp. Mar Drugs 2016; 14:md14080146. [PMID: 27490555 PMCID: PMC4999907 DOI: 10.3390/md14080146] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 07/16/2016] [Accepted: 07/26/2016] [Indexed: 11/17/2022] Open
Abstract
Three new polyhydroxylated sterol derivatives topsensterols A–C (1–3) have been isolated from a marine sponge Topsentia sp. collected from the South China Sea. Their structures were elucidated by detailed analysis of the spectroscopic data, especially the NOESY spectra. Topsensterols A–C (l–3) possess novel 2β,3α,4β,6α-tetrahydroxy-14α-methyl Δ9(11) steroidal nuclei with unusual side chains. Compound 2 exhibited cytotoxicity against human gastric carcinoma cell line SGC-7901 with an IC50 value of 8.0 μM. Compound 3 displayed cytotoxicity against human erythroleukemia cell line K562 with an IC50 value of 6.0 μM.
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Affiliation(s)
- Min Chen
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
- Marine Science & Technology Institute, College of Environmental Science & Engineering, Yangzhou University, 196#, Huayang West Street, Yangzhou 225127, China.
| | - Xu-Dong Wu
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
| | - Qing Zhao
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
| | - Chang-Yun Wang
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
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14
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Thatai P, Sapra B. Critical review on retrospective and prospective changes in antifungal susceptibility testing for dermatophytes. Mycoses 2016; 59:615-27. [DOI: 10.1111/myc.12514] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 04/19/2016] [Accepted: 04/19/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Purva Thatai
- Division of Pharmaceutics; Department of Pharmaceutical Sciences; Punjabi University; Patiala India
| | - Bharti Sapra
- Division of Pharmaceutics; Department of Pharmaceutical Sciences; Punjabi University; Patiala India
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15
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Zou XZ, Zhang JA, Zhang LJ, Liu YJ, Li N, Li Y, Wei SC, Pan M. Crystal structures and biological activities of a symmetrical quinoline thioether ligand and its transition metal complexes. INORG CHEM COMMUN 2015. [DOI: 10.1016/j.inoche.2015.01.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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Studies on antimicrobial effects of four ligands and their transition metal complexes with 8-mercaptoquinoline and pyridine terminal groups. Bioorg Med Chem Lett 2015; 25:1778-1781. [PMID: 25791454 DOI: 10.1016/j.bmcl.2015.02.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 02/10/2015] [Accepted: 02/20/2015] [Indexed: 11/24/2022]
Abstract
Four types of ligands (Q1-Q4) and their complexes (1-36) with transition metal ions have been synthesized, in which two new complexes (15 and 20) have been prepared and tested. In vitro antimicrobial activities of the ligands and their complexes were investigated against a representative panel of strains including two Gram positive bacteria (Sarcina ureae, Staphylococcus aureus), two Gram negative bacteria (Escherichia coli, Pseudomonas aeruginosa) and three fungi (Aspergillus niger, Saccharomyces cerevisiae, Fusarium oxysporum f. sp. cubense). The relationship between the structure and the antibacterial activities was discussed. Our study results indicated that some compounds have preferred antibacterial activities that may have potential pharmaceutical applications.
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17
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Raj T, Kaur Billing B, Kaur N, Singh N. Design, synthesis and antimicrobial evaluation of dihydropyrimidone based organic–inorganic nano-hybrids. RSC Adv 2015. [DOI: 10.1039/c5ra08765a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Substituted dihydropyrimidone derivatives were synthesized through one pot multicomponent Zn(ClO4)2catalysed Biginelli reactions between differently substituted aromatic aldehydes, urea and ethylacetoacetate.
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Affiliation(s)
- Tilak Raj
- Department of Chemistry
- Indian Institute of Technology Ropar (IIT Ropar)
- Rupnagar
- India
| | - Beant Kaur Billing
- Centre for Nanoscience and Nanotechnology (UIEAST)
- Panjab University
- Chandigarh
- India
| | - Navneet Kaur
- Centre for Nanoscience and Nanotechnology (UIEAST)
- Panjab University
- Chandigarh
- India
| | - Narinder Singh
- Department of Chemistry
- Indian Institute of Technology Ropar (IIT Ropar)
- Rupnagar
- India
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18
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Zhang JA, Li Y, Fan YZ, Zou XZ, Liu YJ, Zhang LJ, Zheng SR. Crystal structures and biological activities of Mn (II) and Cd (II) complexes from an asymmetrical Schiff base ligand. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.09.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Mahal A, Goshisht MK, Khullar P, Kumar H, Singh N, Kaur G, Bakshi MS. Protein mixtures of environmentally friendly zein to understand protein–protein interactions through biomaterials synthesis, hemolysis, and their antimicrobial activities. Phys Chem Chem Phys 2014; 16:14257-70. [DOI: 10.1039/c4cp01457j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Protein–protein interactions through biomaterials synthesis for biological applications.
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Affiliation(s)
- Aabroo Mahal
- Department of Chemistry
- B.B.K. D.A.V. College for Women
- Amritsar 143005, India
- Department of Chemistry
- Dr. B. R. Ambedkar National Institute of Technology
| | - Manoj Kumar Goshisht
- Department of Chemistry
- B.B.K. D.A.V. College for Women
- Amritsar 143005, India
- Department of Chemistry
- Dr. B. R. Ambedkar National Institute of Technology
| | - Poonam Khullar
- Department of Chemistry
- B.B.K. D.A.V. College for Women
- Amritsar 143005, India
| | - Harsh Kumar
- Department of Chemistry
- Dr. B. R. Ambedkar National Institute of Technology
- Jalandhar-144011, India
| | - Narinder Singh
- Department of Chemistry
- Indian Institute of Technology Ropar
- Rupnagar-140001, India
| | - Gurinder Kaur
- Nanotechnology Research Laboratory
- College of North Atlantic
- Labrador City, NL A2V 2K7 Canada
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20
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Raj T, Singh N, Ishar M. Unusual transformation of substituted-3-formylchromones to pyrimidine analogues: Synthesis and antimicrobial activities of 5-(o-hydroxyaroyl)pyrimidines. Bioorg Med Chem Lett 2013; 23:6093-6. [DOI: 10.1016/j.bmcl.2013.09.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 09/04/2013] [Accepted: 09/07/2013] [Indexed: 11/27/2022]
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21
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Li S, Wei M, Chen G, Lin Y. Two new dihydroisocoumarins from the endophytic fungus Aspergillus sp. collected from the south china sea. Chem Nat Compd 2012. [DOI: 10.1007/s10600-012-0254-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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22
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Syntheses, crystal structures and antimicrobial activities of thioether ligands containing quinoline and pyridine terminal groups and their transition metal complexes. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.02.073] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Shao CL, Wu HX, Wang CY, Liu QA, Xu Y, Wei MY, Qian PY, Gu YC, Zheng CJ, She ZG, Lin YC. Potent antifouling resorcylic acid lactones from the gorgonian-derived fungus Cochliobolus lunatus. JOURNAL OF NATURAL PRODUCTS 2011; 74:629-633. [PMID: 21348465 DOI: 10.1021/np100641b] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Three new 14-membered resorcylic acid lactones, two with a rare natural acetonide group and one with a 5-chloro-substituted lactone, named cochliomycins A-C (1-3), together with four known analogues, zeaenol (4), LL-Z1640-1 (5), LL-Z1640-2 (6), and paecilomycin F (7), were isolated from the culture broth of Cochliobolus lunatus, a fungus obtained from the gorgonian Dichotella gemmacea collected in the South China Sea. Their structures and the relative configurations of 1-3 were elucidated using comprehensive spectroscopic methods including NOESY spectra and chemical conversions. A transetherification reaction was also observed in which cochliomycin B (2) in a solution of CDCl(3) slowly rearranged to give cochliomycin A (1) at room temperature. These resorcylic acid lactones were evaluated against the larval settlement of barnacle Balanus amphitrite, and antifouling activity was detected for the first time for this class of metabolites. The antibacterial and cytotoxic activities of these compounds were also examined.
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Affiliation(s)
- Chang-Lun Shao
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
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24
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Comparative study of itraconazole-cyclodextrin inclusion complex and its commercial product. Arch Pharm Res 2010; 33:1009-17. [DOI: 10.1007/s12272-010-0706-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Revised: 12/23/2009] [Accepted: 02/16/2010] [Indexed: 10/19/2022]
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25
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Five sesquiterpenoids from a marine-derived fungus Aspergillus sp. isolated from a gorgonian Dichotella gemmacea. Mar Drugs 2010; 8:941-9. [PMID: 20479961 PMCID: PMC2866469 DOI: 10.3390/md8040941] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2010] [Revised: 03/17/2010] [Accepted: 03/26/2010] [Indexed: 12/04/2022] Open
Abstract
Three new phenolic bisabolane-type sesquiterpenoids: (+)-methyl sydowate (1), 7-deoxy-7,14-didehydrosydonic acid (2), and 7-deoxy-7,8-didehydrosydonic acid (3), together with two known fungal metabolites were isolated from the fermentation broth of a marine-derived fungus Aspergillus sp., which was isolated in turn from a gorgonian Dichotella gemmacea collected from the South China Sea. Their structures were elucidated by combined spectroscopic methods, and the structure of 1 was further confirmed by single-crystal X-ray data.
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26
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Structure, biological and electrochemical studies of transition metal complexes from N,S,N′ donor ligand 8-(2-pyridinylmethylthio)quinoline. Polyhedron 2010. [DOI: 10.1016/j.poly.2009.07.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Syntheses, structures and bioactivities of cadmium(II) complexes with a tridentate heterocyclic N- and S-ligand. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.03.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Odabasi Z, Paetznick VL, Rodriguez JR, Chen E, Rex JH, Leitz GJ, Ostrosky-Zeichner L. Lack of correlation of 24- vs. 48-h itraconazole minimum inhibitory concentrations with microbiological and survival outcomes in a guinea pig model of disseminated candidiasis. Mycoses 2009; 53:438-42. [PMID: 19500259 DOI: 10.1111/j.1439-0507.2009.01733.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
A 'trailing' effect has been commonly observed when azole antifungals are tested against Candida spp. Previous experience with fluconazole indicates that 24-h minimum inhibitory concentration (MIC) values are more compatible endpoints when compared with clinical outcomes. We evaluated the trailing effect of Candida isolates tested with itraconazole in a guinea pig model of systemic candidiasis. Survival and organ burden were only significantly affected by using a higher dose of itraconazole, irrespective of the MIC differences at 24 and 48 h. A fluconazole-resistant strain with susceptible dose-dependent MICs to itraconazole was successfully treated with high-dose itraconazole. Our data suggests that survival and microbiological response depend more on drug dosing than on the trailing phenotype of the isolates.
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Affiliation(s)
- Zekaver Odabasi
- Laboratory of Mycology Research, Division of Infectious Diseases, University of Texas, Houston Medical School, Houston, TX, USA.
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29
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Zhang JA, Pan M, Zhang JY, Zhang HK, Fan ZJ, Kang BS, Su CY. Syntheses, structures and bioactivities of silver(I) complexes with a tridentate heterocyclic N- and S-ligand. Polyhedron 2009. [DOI: 10.1016/j.poly.2008.09.029] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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30
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31
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Adler-moore JP, Proffitt RT. Development, Characterization, Efficacy and Mode of Action of Ambisome, A Unilamellar Liposomal Formulation of Amphotericin B. J Liposome Res 2008. [DOI: 10.3109/08982109309150729] [Citation(s) in RCA: 171] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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32
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Huang Z, Cai X, Shao C, She Z, Xia X, Chen Y, Yang J, Zhou S, Lin Y. Chemistry and weak antimicrobial activities of phomopsins produced by mangrove endophytic fungus Phomopsis sp. ZSU-H76. PHYTOCHEMISTRY 2008; 69:1604-1608. [PMID: 18343465 DOI: 10.1016/j.phytochem.2008.02.002] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2007] [Revised: 01/31/2008] [Accepted: 02/03/2008] [Indexed: 05/26/2023]
Abstract
Three metabolites named phomopsin A (1), B (2) and C (3), together with two known compounds cytosporone B (4) and C (5), were isolated from the mangrove endophytic fungus, Phomopsis sp. ZSU-H76 obtained from the South China Sea. Their structures were elucidated by spectroscopic methods, mainly by 1D and 2D NMR spectroscopic techniques. The medium-sized cyclic phenol ether based on 1 or 2 is rare in natural products. In bioassays, compounds 1, 2, and 3 had no significant antibiotic activities, but compounds 4 and 5 inhibited two fungi Candida albicans and Fusarium oxysporum with an MIC ranging from 32 to 64 microg/ml.
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Affiliation(s)
- Zhongjing Huang
- School of Chemistry and Chemical Engineering, Sun Yat-Sen (Zhongshan) University, Guangzhou, PR China
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33
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TAN N, PAN JH, PENG GT, MOU CB, TAO YW, SHE ZG, YANG ZL, ZHOU SN, LIN YC. A Copper Coordination Compound Produced by a Marine FungusFusarium sp. ZZF51 with Biosorption of Cu(II) Ions. CHINESE J CHEM 2008. [DOI: 10.1002/cjoc.200890097] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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EUCAST definitive document EDef 7.1: method for the determination of broth dilution MICs of antifungal agents for fermentative yeasts. Clin Microbiol Infect 2008; 14:398-405. [PMID: 18190574 DOI: 10.1111/j.1469-0691.2007.01935.x] [Citation(s) in RCA: 376] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Dabur R, Gupta A, Mandal TK, Singh DD, Bajpai V, Gurav AM, Lavekar GS. Antimicrobial activity of some Indian medicinal plants. AFRICAN JOURNAL OF TRADITIONAL, COMPLEMENTARY, AND ALTERNATIVE MEDICINES 2007; 4:313-8. [PMID: 20161895 DOI: 10.4314/ajtcam.v4i3.31225] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The antimicrobial potential of seventy-seven extracts from twenty-four plants was screened against eight bacteria and four pathogenic fungi, using microbroth dilution assay. Lowest concentration of the extract, which inhibits any visual microbial growth after treatment with p-iodonitrotetrazolium violet, was considered to be minimum inhibitory concentration (MIC). Water extracts of Acacia nilotica, Justicia zelanica, Lantana camara and Saraca asoca exhibited good activity against all the bacteria tested and the MIC was recorded in range of 9.375-37.5 microg/ml and 75.0-300.0 microg/ml against the bacterial and fungal pathogens, respectively. The other extracts of Phyllanthus urinaria, Thevetia nerifolia, Jatropha gossypifolia Saraca asoca, Tamarindus indica, Aegle marmelos, Acacia nilotica, Chlorophytum borivilianum, Mangifera indica, Woodfordia fruticosa and Phyllanthus emblica showed antimicrobial activity in a range of 75-1200 microg/ml.
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Affiliation(s)
- Rajesh Dabur
- Regional Research Institute (Ay), Nehru Garden, Kothrud, Pune-411 038.
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36
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Yang RY, Li CY, Lin YC, Peng GT, She ZG, Zhou SN. Lactones from a brown alga endophytic fungus (No. ZZF36) from the South China Sea and their antimicrobial activities. Bioorg Med Chem Lett 2006; 16:4205-8. [PMID: 16781152 DOI: 10.1016/j.bmcl.2006.05.081] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2006] [Revised: 05/09/2006] [Accepted: 05/29/2006] [Indexed: 11/19/2022]
Abstract
Two new metabolites named 6-oxo-de-O-methyllasiodiplodin (1) and (E)-9-etheno-lasiodiplodin (2), with three known compounds lasiodiplodin (3), de-O-methyllasiodiplodin (4), and 5-hydroxy-de-O-methyllasiodiplodin (5), were isolated from the mycelium extracts of a brown alga endophytic fungus (No. ZZF36) obtained from the South China Sea. Their structures were elucidated using spectroscopic methods, mainly 1D and 2D NMR. Additionally, the structure of compound 1 was confirmed by single crystal X-ray diffraction analysis. The antimicrobial activities of lasiodiplodins, and the 13-acetyl and 12,14-dibromo derivatives of lasiodiplodin were tested for the first time and the results were compared to each other.
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Affiliation(s)
- Rui-yun Yang
- School of Chemistry and Chemical Engineering, Sun Yat-sen (Zhongshan) University, Guangzhou, PR China
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37
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Hector RF. An Overview of Antifungal Drugs and Their Use for Treatment of Deep and Superficial Mycoses in Animals. ACTA ACUST UNITED AC 2005; 20:240-9. [PMID: 16317914 DOI: 10.1053/j.ctsap.2005.07.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Fungal infections are often challenging to manage, given the limited numbers of therapeutics and a general lack of applicable clinical literature for their use in a given animal species. This article reviews some of the underlying principles that can affect the therapeutic outcome for a given antifungal, and provides specific information from the literature that is intended to highlight the distinctive properties of the most commonly used antifungals in veterinary medicine to better facilitate their successful application in clinical practice.
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Affiliation(s)
- Richard F Hector
- Institute for Global Health, University of California San Francisco, San Francisco, CA 94105, USA.
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38
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Lombardi G, Farina C, Andreoni S, Fazii P, Faggi E, Pini G, Manso E, Nanetti A, Mazzoni A. Comparative evaluation of SensititreR YeastOne vs. the NCCLS M27A protocol and E-test for antifungal susceptibility testing of yeasts. Vergleichende Bewertung des SensititreR YeastOne vs. NCCLS M27A-Protokoll und E-test zur Empfindlichkeitsprufung von Hefen gegenuber Antimykotika. Mycoses 2004; 47:397-401. [PMID: 15504123 DOI: 10.1111/j.1439-0507.2004.01013.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A recently developed microdilution method (Sensititre) YeastOne) may represent a valid alternative to the National Committee for Clinical Laboratory Standards (NCCLS) method for routine testing. The Medical Mycology Committee of the Associazione Microbiologi Clinici Italiani (AMCLI) decided to evaluate its reproducibility and reliability compared with the NCCLS M27A protocol and the E-test. Nineteen strains each of Candida albicans and Ca. parapsilosis, isolated from systemic infections, were tested against amphotericin B, flucytosine, ketoconazole, itraconazole, and fluconazole. All the participating laboratories tested the YeastOne panels, while the E-test and the NCCLS method were performed by two laboratories each. Interlaboratory reproducibility showed a good correlation (from 95% for amphotericin B to 92.5% for flucytosine). The agreement between NCCLS and YeastOne ranged from 95 (ketoconazole and itraconazole) to 100% (amphotericin B and flucytosine), whereas the agreement between E-test and YeastOne ranged from 72.5 (fluconazole) to 100% (amphotericin B and flucytosine). The Sensititre YeastOne panels appear to be an excellent alternative to both the E-test and the NCCLS protocol for antifungal susceptibility testing.
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Affiliation(s)
- G Lombardi
- Medical Mycology Committee, Associazione Microbiologi Clinici Italiani (AMCLI), Varese, Italy.
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39
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Chen J, Wan Z, Li R. Modified colorimetric assay for susceptibility testing of azole antifungal drugs against Candida species. J Clin Microbiol 2004; 42:1790-3. [PMID: 15071052 PMCID: PMC387539 DOI: 10.1128/jcm.42.4.1790-1793.2004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2003] [Revised: 07/15/2003] [Accepted: 12/18/2003] [Indexed: 11/20/2022] Open
Abstract
We modified a rapid susceptibility assay (RSA) for antifungal susceptibility testing of azoles based upon glucose utilization. This modified RSA method provides quantitative endpoint readings in 6 h. In this study, the modified RSA and the National Committee for Clinical Laboratory Standards M27-A methods were used to determine the MICs of fluconazole and itraconazole for 118 Candida isolates. Yeast nitrogen base containing 0.12 g of glucose per liter was used for the modified RSA method. For fluconazole, agreement among assays within one or two twofold dilutions was 72.9 and 88.1%, respectively; for itraconazole, agreement within one or two twofold dilutions was 82.2 and 89.8%, respectively. These data suggest that the modified RSA method is a reliable and rapid method for azole antifungal susceptibility testing against Candida species.
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Affiliation(s)
- Jian Chen
- Research Center for Medical Mycology, Peking University, Beijing, People's Republic of China
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40
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Freile ML, Giannini F, Pucci G, Sturniolo A, Rodero L, Pucci O, Balzareti V, Enriz RD. Antimicrobial activity of aqueous extracts and of berberine isolated from Berberis heterophylla. Fitoterapia 2004; 74:702-5. [PMID: 14630179 DOI: 10.1016/s0367-326x(03)00156-4] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The antimicrobial activity of Berberis heterophylla leaves, stems and root aqueous extracts was studied in vitro on Gram-positive and Gram-negative bacteria and fungi. The in vitro antifungal activity of berberine isolated from the same source against different Candida species was also investigated.
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Affiliation(s)
- M L Freile
- Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco Km 4, Comodoro Rivadavia, Chubut 9000, Argentina
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41
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Gökahmetoglu S, Nedret Koç A, Patiroglu T. Antifungal susceptibility testing of Candida albicans by flow cytometry. Mycoses 2003; 46:307-11. [PMID: 12950899 DOI: 10.1046/j.1439-0507.2003.00903.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Antifungal susceptibilities of 28 Candida albicans isolates and two quality control strains to amphotericin B and fluconazole were determined by flow cytometry and microdilution method. Minimum inhibitory concentrations (MICs) obtained by flow cytometry were compared with the results obtained by The National Committee for Clinical Laboratory Standards Subcommittee (NCCLS) broth microdilution method. The agreement of results (within two dilution) obtained was found as 96 and 93% for amphotericin B and fluconazole, respectively. At least 24 h incubation was required for reading the microdilution assays. Four hours of incubation was required for fluconazole, whereas 2-h incubation was sufficient for amphotericin B to provide MIC by flow cytometry. Results of this study show that flow cytometry provides a rapid and sensitive in vitro method for antifungal susceptibility testing of Candida albicans isolates.
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Affiliation(s)
- Selma Gökahmetoglu
- Department of Microbiology, Erciyes University Medical Faculty, TR-38039 Kayseri, Turkey.
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42
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Rodríguez-Tudela J, Barchiesi F, Bille J, Chryssanthou E, Cuenca-Estrella M, Denning D, Donnelly J, Dupont B, Fegeler W, Moore C, Richardson M, Verweij P. Method for the determination of minimum inhibitory concentration (MIC) by broth dilution of fermentative yeasts. Clin Microbiol Infect 2003. [DOI: 10.1046/j.1469-0691.2003.00789.x] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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43
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Seibold M, Tintelnot K. Susceptibility testing of fungi--current status and open questions. PROGRESS IN DRUG RESEARCH. FORTSCHRITTE DER ARZNEIMITTELFORSCHUNG. PROGRES DES RECHERCHES PHARMACEUTIQUES 2003; Spec No:191-241. [PMID: 12675477 DOI: 10.1007/978-3-0348-7974-3_5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
The increase of fungal infections and the improvement of therapeutical options demand reliable antifungal susceptibility testing. In vitro susceptibility testing of fungi--in contrast to bacteria--is not yet established as a routine method. The NCCIS (National Committee for Clinical Laboratory Standards) guidelines for susceptibility testing of yeasts (and proposed for hyphomycetes) are most important for standardization. Meanwhile, essential parts of this test procedure are accepted, but it should still be improved. The concept of using only one test medium for all drugs and test organisms is not realized so far. There are also some test situations that prevent the NCCLS standard from being applied. Based on our experience, this article describes the NCCLS methods and their modifications. It places emphasis on lipophilic drugs showing controversies despite standardization. Furthermore, the prediction of MICs on the clinical outcome is discussed. Since there are some pitfalls in testing antifungals, this should be done in experienced laboratories only. The MIC has to be regarded as only one, but an important, factor in the management of fungal diseases. Host-, drug-, and pathogen-specific data should be considered simultaneously.
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Affiliation(s)
- Michael Seibold
- Robert Koch-Institut, Mykologie, Nordufer 20, 13353 Berlin, Germany
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44
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María José L, Guadalupe C, Francisco S, Manuel C. CHROMAgar Candida más fluconazol: comparación con técnicas de microdilución. Enferm Infecc Microbiol Clin 2003. [DOI: 10.1016/s0213-005x(03)72994-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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45
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Abstract
Cryptococcus neoformans has risen to a worldwide highly recognizable major opportunistic pathogen with deadly consequences. It has become a model fungus to study a variety of paradigms in the host-fungus relationships. Genomic studies are advancing knowledge on its evolution and dissecting its virulence composite. Studies designed to understand host immunology to this fungus are leading to development of active and passive prevention and therapeutic strategies. This article collates and analyzes both new and old knowledge about the pathogen to help frame the meaning of human cryptococcosis as it starts to evolve in the new millennium.
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Affiliation(s)
- John R Perfect
- Department of Medicine, Division of Infectious Diseases, Duke University Medical Center, PO Box 3353, Durham, NC 27710, USA.
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46
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Fernández-Torres B, Cabañes FJ, Carrillo-Muñoz AJ, Esteban A, Inza I, Abarca L, Guarro J. Collaborative evaluation of optimal antifungal susceptibility testing conditions for dermatophytes. J Clin Microbiol 2002; 40:3999-4003. [PMID: 12409365 PMCID: PMC139645 DOI: 10.1128/jcm.40.11.3999-4003.2002] [Citation(s) in RCA: 102] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A multicenter study was conducted to define the most suitable testing conditions for antifungal susceptibility of dermatophytes. Broth microdilution MICs of clotrimazole, itraconazole, and terbinafine were determined in three centers against 60 strains of dermatophytes. The effects of inoculum density (ca. 10(3) and 10(4) CFU/ml), incubation time (3, 7, and 14 days), endpoint criteria for MIC determination (complete [MIC-0] and prominent [MIC-2] growth inhibition), and incubation temperature (28 and 37 degrees C) on intra- and interlaboratory agreement were analyzed. The optimal testing conditions identified were an inoculum of 10(4) CFU/ml, a temperature of incubation of 28 degrees C, an incubation period of 7 days, and MIC-0.
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Affiliation(s)
- Belkys Fernández-Torres
- Unitat de Microbiología, Facultat de Medicina, Universitat Rovira i Virgili, Reus, Barcelona, Spain
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47
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Liao RS, Rennie RP, Talbot JA. Comparative evaluation of a new fluorescent carboxyfluorescein diacetate-modified microdilution method for antifungal susceptibility testing of Candida albicans isolates. Antimicrob Agents Chemother 2002; 46:3236-42. [PMID: 12234850 PMCID: PMC128765 DOI: 10.1128/aac.46.10.3236-3242.2002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This report presents a fluorescent carboxyfluorescein diacetate (CFDA)-modified microdilution method used for the susceptibility testing of Candida albicans to amphotericin B, fluconazole, ketoconazole, itraconazole, voriconazole, and flucytosine. Four different broth microdilution susceptibility testing methods were simultaneously evaluated at 24 and 48 h. The MICs determined using the CFDA-modified method (MIC(cfda)) were compared to those obtained by the standard broth microdilution method (MIC(visual)) and a procedure employing the indicator Alamar blue (MIC(alamar)). The reference MIC was determined visually as recommended by the NCCLS M27-A protocol, and then quantified spectrophotometrically following agitation (MIC(spec)). The CFDA-modified microdilution method was demonstrated to effectively determine the MICs for all the antifungal drugs tested at both 24 and 48 h. The results from both the MIC(spec) and MIC(cfda) methods yielded >80% agreement within +/-1 dilution and >90% agreement within +/-2 dilutions at 24 h in comparison to the reference MIC(visual) method, respectively. The trailing growth phenomenon that occurs with azole antifungal drugs and many strains of C. albicans did not inhibit the effectiveness of the MIC(spec) and MIC(cfda) methods. The MIC(spec) and MIC(cfda) methods shared 92.8% agreement within +/-1 dilution at 24 h and 87.6% agreement within +/-1 dilution at 48 h.
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Affiliation(s)
- Robert S Liao
- Department of Medical Microbiology and Immunology, University of Alberta, Canada
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48
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Silva MDRR, Costa MR, Miranda ATB, Fernandes ODFL, Costa CR, Paula CRD. Evaluation of Etest and macrodilution broth method for antifungal susceptibility testing of Candida sp strains isolated from oral cavities of AIDS patients. Rev Inst Med Trop Sao Paulo 2002; 44:121-5. [PMID: 12163903 DOI: 10.1590/s0036-46652002000300002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A comparison of the Etest and the reference broth macrodilution susceptibility test for fluconazole, ketoconazole, itraconazole and amphotericin B was performed with 59 of Candida species isolated from the oral cavities of AIDS patients. The Etest method was performed according to the manufacturer's instructions, and the reference method was performed according to National Committee for Clinical Laboratory Standards document M27-A guidelines. Our data showed that there was a good correlation between the MICs obtained by the Etest and broth dilution methods. When only the MIC results at +/- 2 dilutions for both methods were considered, the agreement rates were 90.4% for itraconazole, ketoconazole and amphotericin B and 84.6% for fluconazole of the C. albicans tested. In contrast, to the reference method, the Etest method classified as susceptible three fluconazole-resistant isolates and one itraconazole-resistant isolate, representing four very major errors. These results indicate that Etest could be considered useful for antifungal sensitivity evaluation of yeasts in clinical laboratories.
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Affiliation(s)
- Maria do Rosário R Silva
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, Brasil.
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49
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Umeyama T, Nagai Y, Niimi M, Uehara Y. Construction of FLAG tagging vectors for Candida albicans. Yeast 2002; 19:611-8. [PMID: 11967831 DOI: 10.1002/yea.863] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
We have constructed three new vectors for Candida albicans (pFLAG-Act1, pFLAG-Mal2, and pFLAG-Met3). The proteins can be expressed as C-terminal FLAG-tagged proteins under the control of different promoters (ACT1, MAL2, and MET3). To confirm the protein expression, we used the Renilla reniformis luciferase and the drug efflux pump Cdr1p of Candida albicans as reporters. The luciferase protein expressed by the MET3 promoter was found to have the strongest activity of the three promoters when cultured in a methionine-depleted synthetic medium. Cdr1p was expressed as a C-terminal FLAG-tagged protein using either these vectors or PCR-mediated integration. The fluconazole resistance was increased by the Cdr1p expression in a CDR1 homozygous disruptant. The expressed proteins were detected by Western blotting using the anti-FLAG antibody. We also constructed a Cdr1p-FLAG expressing strain, in which we directly tagged Cdr1p with FLAG on the genome loci, using a PCR-based integrative marker cassette that was amplified using the pFLAG vector. We then confirmed the protein expression by Western blotting. Thus, these new vectors are useful as C. albicans genetic tools.
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Affiliation(s)
- Takashi Umeyama
- Department of Bioactive Molecules, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
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50
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Murai T, Nakamura Y, Kano R, Watanabe S, Hasegawa A. Homogeneous cell suspension of Malassezia pachydermatis obtained with an ultrasonic homogenizer. J Vet Med Sci 2002; 64:381-3. [PMID: 12014587 DOI: 10.1292/jvms.64.381] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
It is difficult to produce homogeneous cell suspensions of Malassezia pachydermatis, since yeast cells paste up and form many clumps. However, homogeneous fungal suspensions are required for susceptibility examinations and biochemical analyses. Although several types of trials have been carried out using glass homogenizers and many types of agents to obtain homogeneous fungal suspension. They have not yielded good results. We therefore attempted to use an ultrasonic homogenizer to separate clumps of yeast cells into separate individual cells. We succeeded in this fashion in producing homogeneous cell suspensions of M. pachydermatis. These results indicate that an ultrasonic homogenizer can be used to prepare homogeneous fungal suspensions of M. pachydermatis.
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Affiliation(s)
- Tae Murai
- Department of Dermatology, Teikyo University School of Medicine, Itabashi, Tokyo, Japan
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