Abstract
The effects of the pyrethroids flucythrinate, cyfluthrin, bioallethrin and resmethrin on metabolic cooperation between V79 cells were investigated. Addition of flucythrinate to cocultures of 6-thioguanine-resistant and 6-thioguanine-sensitive V79 cells significantly increased the mutant cell recovery, indicating inhibition of intercellular communication. No such effect was observed by the other pyrethroids tested. To compare the modes of action of TPA-, DDT-, and pyrethroid-induced inhibition of intercellular communication, co-exposure experiments were undertaken. Addition of TPA, together with increasing doses of fenvalerate or flucythrinate, produced a synergistic response. Various combinations of fenvalerate-, flucythrinate- and DDT-exposure gave results in accordance with an additive response. The result suggest different pathways of action for TPA and the insecticides investigated in this study.
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