Abstract

Tenuazonic acid (TA) was topically applied to the interscapular region of Swiss albino mice at different doses before the application of 12-O-tetradecanoyl phorbol-13-acetate (TPA). Skin from the painted area was examined for ornithine decarboxylase (ODC) enzyme estimation [1]. It was observed that TA inhibited TPA induced ODC activity. The inhibitory effect of TA was also found in mouse skin tumor promotion in the two stage initiation promotion protocol. There was a remarkable delay in the latency period and decrease in the number of tumors developed and the percentage of tumor bearing animals after TA treatment.

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