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de Souza MQ, Bierhals DV, Reis AJ, Chimara E, Vianna JS, von Groll A, da Silva PA, Ramis IB. 2,3,5-triphenyl tetrazolium chloride as colorimetric indicator for drug susceptibility testing against nontuberculous mycobacteria. Diagn Microbiol Infect Dis 2024; 108:116096. [PMID: 37931387 DOI: 10.1016/j.diagmicrobio.2023.116096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 09/04/2023] [Accepted: 09/22/2023] [Indexed: 11/08/2023]
Abstract
This study aimed to propose and evaluate a drug susceptibility testing (DST) using the 2,3,5-triphenyl tetrazolium chloride (TTC) as a colorimetric indicator against Mycobacterium abscessus complex (MABC), M. avium complex (MAC), and M. kansasii strains, main nontuberculous mycobacteria (NTM) of clinical relevance. Our results demonstrated that the assay using TTC and the broth microdilution method recommended by the Clinical and Laboratory Standards Institute had essential agreement above 91%, 92%, and 100%, for drugs tested against MABC, MAC, and M. kansasii strains, respectively. Categorical agreement above 91% was obtained for most drugs tested against MABC, except to cefoxitin (76.5%). For drugs tested against MAC and M. kansasii, categorical agreement above 92% and 100% was observed, respectively. TTC showed to be a promising colorimetric indicator of growth to be used in DST for NTM, allowing an easier reading of results.
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Affiliation(s)
- Mariana Quaresma de Souza
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
| | - Dienefer Venske Bierhals
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
| | - Ana Julia Reis
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
| | - Erica Chimara
- Núcleo de Tuberculose e Micobacterioses, Instituto Adolfo Lutz, São Paulo, Brazil
| | - Júlia Silveira Vianna
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
| | - Andrea von Groll
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
| | - Pedro Almeida da Silva
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil.
| | - Ivy Bastos Ramis
- Laboratório de Micobactérias, Núcleo de Pesquisa em Microbiologia Médica, Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Rio Grande do Sul, Brazil
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Microbiological Aspects of Pharmaceutical Manufacturing of Adipose-Derived Stem Cell-Based Medicinal Products. Cells 2023; 12:cells12050680. [PMID: 36899816 PMCID: PMC10000438 DOI: 10.3390/cells12050680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/08/2023] [Accepted: 02/14/2023] [Indexed: 02/24/2023] Open
Abstract
Subcutaneous adipose tissue is an excellent source of mesenchymal stem cells (ADSCs), which can be used in cell therapies as an active substance in advanced therapy medicinal products (ATMPs). Because of the short shelf-life of ATMPs and the time needed to obtain the results of microbiological analysis, the final product is often administered to the patient before sterility is confirmed. Because the tissue used for cell isolation is not sterilized to maintain cell viability, controlling and ensuring microbiological purity at all stages of production is crucial. This study presents the results of monitoring the contamination incidence during ADSC-based ATMP manufacturing over two years. It was found that more than 40% of lipoaspirates were contaminated with thirteen different microorganisms, which were identified as being physiological flora from human skin. Such contamination was successfully eliminated from the final ATMPs through the implementation of additional microbiological monitoring and decontamination steps at various stages of production. Environmental monitoring revealed incidental bacterial or fungal growth, which did not result in any product contamination and was reduced thanks to an effective quality assurance system. To conclude, the tissue used for ADSC-based ATMP manufacturing should be considered contaminated; therefore, good manufacturing practices specific to this type of product must be elaborated and implemented by the manufacturer and the clinic in order to obtain a sterile product.
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NISIN and gilaburu (Viburnum opulus L.) combination is a cost-effective way to control foodborne Staphylococcus aureus. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.109213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Philus CD, Mahanty B. Dynamic modelling of tetrazolium-based microbial toxicity assay-a parametric proxy of traditional dose-response relationship. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:45390-45401. [PMID: 33866499 DOI: 10.1007/s11356-021-13870-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 04/06/2021] [Indexed: 06/12/2023]
Abstract
Microbial toxicity of test substances in tetrazolium assay is often quantified while referring to their IC50 values. However, the implication of such an estimate is very limited and can differ across studies depending on prevailing test conditions. In this work, a factorial design-based end-point microbial toxicity assay was performed, which suggests a significant interaction (P= 0.041) between inoculum and tetrazolium dose on formazan production. Subsequently, a dynamic model framework was utilized to capture the nonlinearities in biomass, substrate, formazan profiles and to project the toxicant inhibition parameter as a robust alternative to IC50 value. Microbial growth, glucose uptake and formazan production in the presence or absence of toxicant (Cu2+) from designed batch experiments were used for sequential estimation of model parameters, and their confidence intervals. A logistic growth model with multiplicative inhibition terms for formazan content and toxicant concentration fits the experimental data reasonably well (R2>0.96). Dynamic relative sensitivity analysis revealed that both microbial growth and formazan production profiles were sensitive to toxicant inhibition parameter. The modelling framework not only provides a better insight into the underlying toxic effect but also offers a stable toxicity index for the test substances that can be extended to design a versatile, robust in vitro assay system.
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Affiliation(s)
- Chris Daniel Philus
- Department of Biotechnology, Karunya Institute of Technology and Sciences, Coimbatore, Tamil Nadu, 641114, India
| | - Biswanath Mahanty
- Department of Biotechnology, Karunya Institute of Technology and Sciences, Coimbatore, Tamil Nadu, 641114, India.
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Zhang Y, Jin X, Arancon NQ, Borris RP. Two New Geranylated Biphenyl Esters From Artocarpus altilis. Nat Prod Commun 2020. [DOI: 10.1177/1934578x20968439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Two new geranylated biphenyl esters, 2,3′,4,4′-tetrahydroxy-3-geranyl-5-carboxyethyl-biphenyl methyl ester (1), 2,3′,4,4′-tetrahydroxy-3-geranyl-5-carboxymethyl-biphenyl methyl ester (2), together with 4 known compounds were isolated from the methanol extract of the leaves of Artocarpus altilis. Their structures were established by spectroscopic means and by comparison with literature data. Compound 1 possessed moderate cytotoxicity toward MDA-MB-231 (a breast carcinoma cell line) with a half-maximal inhibitory concentration value of 30 µM and inhibited the growth of 8 bacteria, including gram-negative and gram-positive organisms, but was inactive against fungi.
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Affiliation(s)
- Yitong Zhang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Xinghua Jin
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Norman Q. Arancon
- College of Agriculture, Forestry and Natural Resource Management, University of Hawaii at Hilo, Hilo, HI, USA
| | - Robert P. Borris
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
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Development and optimization of a stability-indicating chromatographic method for verapamil hydrochloride and its impurities in tablets using an analytical quality by design (AQbD) approach. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104610] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Duan XY, Zhang Y, Yan JQ, Zhou Y, Li GH, Feng XS. Progress in Pretreatment and Analysis of Cephalosporins: An Update Since 2005. Crit Rev Anal Chem 2019; 51:55-86. [PMID: 31646873 DOI: 10.1080/10408347.2019.1676194] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Xiao-Yi Duan
- School of Pharmacy, China Medical University, Shenyang, China
| | - Yuan Zhang
- Department of Pharmacy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jia-Qing Yan
- Department of Pharmacy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yu Zhou
- Department of Pharmacy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Guo-Hui Li
- Department of Pharmacy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xue-Song Feng
- School of Pharmacy, China Medical University, Shenyang, China
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Saviano AM, Bettencourt da Silva RJ, Lourenço FR. Measurement uncertainty for the potency estimation by rapid microbiological methods (RMMs) with correlated data. Regul Toxicol Pharmacol 2019; 102:117-124. [DOI: 10.1016/j.yrtph.2019.01.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 01/07/2019] [Accepted: 01/10/2019] [Indexed: 11/28/2022]
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