The response of tumorigenic human synovial sarcoma (HSS) cell line to 10(-5)M optimum concentration of retinoic acid (RA) included changes in morphology, growth rate, suppression of anchorage-independent growth, induction of high alkaline phosphatase activity and excessive secretion of a 68 kDA glycoprotein of unknown function. HSS cells pretreated with 10(-5)M RA exhibited differential response to 3 potent anticancer drugs, namely cisplatin, vincristine and adriamycin. Sensitivity of the cells to cisplatin was found to be considerably enhanced after exposure to retinoic acid.
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Adwankar et al. (1991) studied this question.
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