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- W2091750809 abstract "Four naturally occurring cytochalasins and three synthetic congeners have been studied for their effects on in vitro sensitization of murine lymphocytes to P815 mastocytoma. The relative order of effectiveness of these secondary fungal metabolites in inhibiting cytotoxic T cell development is as follows: cytochalasin D greater than cytochalasin E greater than cytochalasin A greater than cytochalasin B, 21,22- dihydrocytochalasin A greater than 7- acetylcytochalasin D. The 7,20 diacetylcytochalasin B derivative was inactive at the highest level tested (4 X 10(-6) M). Cytochalasin D is the most effective compound, producing at 5 X 10(-8) M a 50% inhibition of 51Cr release in a 4-hr cytolysis assay. This response pattern is in keeping with other test systems that implicate actin involvement, and underscores the contribution of an unsubstituted 7-hydroxyl drug function in receptor recognition. Inhibition produced by the cytochalasins is reversible if the compounds are removed from the tissue culture medium within the first 24 hr of a 4-day culture period. Delayed addition of cytochalasin D inhibits T cell development only within this first 24 hr of culture. These data suggest that the effects of cytochalasins are at an early step in the sensitization process, possibly antigen recognition." @default.
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- W2091750809 date "1984-02-01" @default.
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- W2091750809 title "Structure-activity relationships of cytochalasins in the differentiation of cytolytic T lymphocytes" @default.
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- W2091750809 doi "https://doi.org/10.1016/0162-3109(84)90006-7" @default.
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