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We report herein an in vitro anticancer evaluation of a series of seven curcumin analogues (3a-g). The National Cancer Institute (NCI US) Protocol was followed and all the compounds were evaluated for their anticancer activity on nine different panels (leukemia, non small cell lung cancer, colon cancer, CNS cancer, melanoma, ovarian cancer, renal cancer, prostate cancer and breast cancer) represented by 60 NCI human cancer cell lines. All the compounds showed significant anticancer activity in one dose assay (drug concentration 10 μM) and hence were evaluated further in five dose assays (0.01, 0.1, 1, 10 and 100 μM) and three dose related parameters GI50, TGI and LC50 were calculated for each (3a-g) in micro molar drug concentrations (μM). The compound 3d (NSC 757927) showed maximum mean percent growth inhibition (PGI) of 112.2%, while compound 3g (NSC 763374) showed less mean PGI of 40.1% in the one dose assay. The maximum anticancer activity was observed with the SR (leukemia) cell line with a GI50 of 0.03 μM. The calculated average sensitivity of all cell lines of a particular subpanel toward the test agent showed that all the curcumin analogues showed maximum activity on leukemia cell lines with GI50 values between 0.23 and 2.67 μM.

Evaluation of Anticancer Activity of Curcumin Analogues Bearing a Heterocyclic Nucleus