Abstract
We recently reported that primary fetal bovine Kidney (PFBK) cells were consistently more sensitive to the cytotoxic effects of fusarium T-2 toxin than Madin-Darby bovine kidney (MDBK) cells in culture. The present report examined the influence of T-2 on selected biochemical parameters of these two culture types. T-2 toxin inhibited incorporation of labeled thymidine, uridine, and leucine in both culture types; at lower concentrations of the toxin, PFBK cells were affected to a greater extent than MDBK cells. T-2 toxin inhibited both the transport of thymidine as well as thymidine incorporation into macromolecules in MDBK cells during initial periods, but did not affect uridine incorporation. The cellular enzymes, K(+)- dependent phosphatase and succinic dehydrogenase were inhibited in MDBK but not in PFBK cultures; acid phosphatase was not influenced in either culture types. In a cell-free system none of the above enzymes were affected by T-2 until the toxin concentration exceeded 10(-5)M.
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