alexa Bitter gourd seed fatty acid rich in 9c,11t,13t-conjugated linolenic acid induces apoptosis and up-regulates the GADD45, p53 and PPARgamma in human colon cancer Caco-2 cells.


Journal of Cancer Science & Therapy

Author(s): Yasui Y, Hosokawa M, Sahara T, Suzuki R, Ohgiya S,

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Abstract Bitter gourd (Momordica charantia) seed oil (BGO) is a unique oil which contains 9cis, 11trans, 13trans-conjugated linolenic acid (9c,11t,13t-CLN) at a high level of more than 60\%. In this study, we investigated the anti-proliferative and apoptosis-inducing effects of free fatty acids prepared from BGO (BGO-FFA) using colon cancer Caco-2 cells. BGO-FFA and purified 9c,11t,13t-CLN remarkably reduced the cell viability of Caco-2. In Caco-2 cells treated with BGO-FFA, DNA fragmentation of apoptosis indicators was observed in a dose-dependent manner. The expression level of apoptosis suppressor Bcl-2 protein was also decreased by BGO-FFA treatment. The GADD45 and p53, which play an important role in apoptosis-inducing pathways, were remarkably up-regulated by BGO-FFA treatment in Caco-2 cells. Up-regulation of PPARgamma mRNA and protein were also observed during apoptosis induced by BGO-FFA. These results suggest that BGO-FFA rich in 9c,11t,13t-CLN may induce apoptosis in Caco-2 cells through up-regulation of GADD45, p53 and PPARgamma. This article was published in Prostaglandins Leukot Essent Fatty Acids and referenced in Journal of Cancer Science & Therapy

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