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자료유형
학술저널
저자정보
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한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology 제14권 제2호
발행연도
2004.1
수록면
350 - 355 (6page)

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Sulforhodamine B (SRB) assay is a rapid, sensitive,and inexpensive method for measuring cell proliferation andchemosensitivity. However, the lactate dehydrogenase (LDH)release assay is generally used to measure cytototoxicity ofinfectious microorganisms against host cells. In this study,we investigated the possibility of applying the SRB assay todetermine cytotoxicity for infectious microorganisms, andcompared the results with those obtained by the LDH releaseassay. We used Vibrio vulnificus as a model of infectiousmicroorganisms. The SRB assay showed that V. vulnificusstrongly induced cytotoxic activity against human intestinalcells, Caco-2 and INT-407 cells. The degree of cytotoxicityclosely correlated with infection time and number ratiosof V. vulnificus to intestinal cells (MOI, multiplicity ofinfection). Furthermore, cytotoxicity values obtained bySRB assay correlated well with results obtained by theLDH release assay, and both assays gave a linear responsewith respect to MOI. Heat-inactivation of V. vulnificus for35 min at 60oC did not induce cytotoxic activity, indicatingthat viability of V. vulnificus is crucial for cytotoxic activityagainst intestinal cells. Although both assays are suitableas cytotoxicity endpoints, the SRB assay is recommendedfor measuring cytotoxicity of infectious microorganismsagainst host cells because of its significantly lower costand more stable endpoint than the LDH release assay.

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