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Information Journal Paper

Title

INTERFERENCES IN THE OPTIMIZATION OF THE MTT ASSAY FOR VIABILITY ESTIMATION OF PROTEUS MIRABILIS

Pages

  159-167

Abstract

 Background: The chromogenic assay based on MTT bioreduction was adapted to PROTEUS MIRABILIS VIABILITY estimations. We primarily intended to use the assay for the evaluation of novel antimicrobial compounds, including structures with possible per-meabilizing activity. Therefore, the influence of basic permeabilizing agents like Triton X-100 and EDTA upon the MTT ASSAY was studied.Methods: 3-(4, 5-Dimethyl-2-thiazolyl)-2, 5-diphenyl-2H-tetrazolium bromide (MTT) was used as a substrate for the whole-cell dehydrogenase activity estimations. The amount of formazan product was evaluated in the end-point reactions terminated with acidic isopropanol or in the continuous reactions run in the presence of low detergent concentrations.Results: The generally established procedure of the end product dissolution with acidic isopropanol caused absorbance instability which strongly affected the results accuracy. The disadvantage was especially pronounced when the assay was conducted in Mueller-Hinton Broth. PBS with 0.01% Triton X-100 used as the reaction medium allowed to omit the formazan dissolution step and follow the microbial MTT reduction in a continuous mode. It was observed that in PROTEUS MIRABILIS with a compromised outer membrane the assay score was artificially increased above the untreated control.Conclusion: The dependence of the assay results on the cell integrity might be a major drawback of the MTT ASSAY application for the evaluation of novel antimicrobials against Gram-negative microorganisms. On the other hand, the MTT reduction could be conveniently used to assay the permeabilization degree in biotechnological protocols.

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    Cite

    APA: Copy

    GRELA, EWA, ZABEK, ADAM, & GRABOWIECKA, AGNIESZKA. (2015). INTERFERENCES IN THE OPTIMIZATION OF THE MTT ASSAY FOR VIABILITY ESTIMATION OF PROTEUS MIRABILIS. AVICENNA JOURNAL OF MEDICAL BIOTECHNOLOGY (AJMB), 7(4 (27)), 159-167. SID. https://sid.ir/paper/313880/en

    Vancouver: Copy

    GRELA EWA, ZABEK ADAM, GRABOWIECKA AGNIESZKA. INTERFERENCES IN THE OPTIMIZATION OF THE MTT ASSAY FOR VIABILITY ESTIMATION OF PROTEUS MIRABILIS. AVICENNA JOURNAL OF MEDICAL BIOTECHNOLOGY (AJMB)[Internet]. 2015;7(4 (27)):159-167. Available from: https://sid.ir/paper/313880/en

    IEEE: Copy

    EWA GRELA, ADAM ZABEK, and AGNIESZKA GRABOWIECKA, “INTERFERENCES IN THE OPTIMIZATION OF THE MTT ASSAY FOR VIABILITY ESTIMATION OF PROTEUS MIRABILIS,” AVICENNA JOURNAL OF MEDICAL BIOTECHNOLOGY (AJMB), vol. 7, no. 4 (27), pp. 159–167, 2015, [Online]. Available: https://sid.ir/paper/313880/en

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