Gh. Shah et al., PSYCHOTROPIC-DRUGS AND LOCAL-ANESTHETICS RESTORE CARDIOLIPIN-INHIBITED MAMMALIAN DNA TOPOISOMERASE-I ACTIVITY, Biological & pharmaceutical bulletin, 20(12), 1997, pp. 1233-1234
The activity of mammalian topoisomerase I is inhibited by acidic phosp
holipids. We investigated the effect of psychotropic drugs and local a
nesthetics on cardiolipin-inhibited calf thymus DNA topoisomerase I ac
tivity, Chlorpromazine, promethazine, and imipramine, which interact w
ith phospholipids, suppressed the inhibitory effect of cardiolipin, Th
e present results suggest that relaxation of DNA supercoiling is invol
ved in the cytotoxic action of these drugs.