(05-12-07) Apoptosis of human gastric cancer cells induced by omega-3 polyunsaturated fatty acids.

Yin Y, Zhan WH, Peng JS, Zhao ZG.
Department of Gsatrointestinopancreatic Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China. [email protected].
OBJECTIVE: To investigate the effect of omega-3 polyunsaturated fatty acids(omega-3PUFAs) on the apoptosis of human gastric cancer cell line SGC-7901 and to explore the potential mechanisms. METHODS: Cells were treated with eicosapentaenoic acid (20:5omega-3,EPA) or docosahexaenoic acid (22:6omega-3, DHA) at concentrations of 10, 20 and 40 mug/ml. Cell growth and apoptosis were analyzed with MTT assay, cell morphology, DNA electrophoresis and flow cytometry. Mitochondrial membrane potential ( triangle right psi mt) was measured by fluorescent probe rhodamine 123. The distribution of cytochrome C in mitochondria and cytosol was determined by enzyme-linked immunoadsorbent assay. The composition of mitochondrial membrane phosphlipid(MMP)was examined by gas chromatography. RESULTS: Both EPA and DHA markedly inhibited the SGC-7901 cell growth and induced apoptosis in a time- and dose-dependent manner. After incubation of the cells with 40 mug/ml EPA or DHA for 24 hours, the level of triangle rightpsimt siginificantly decreased (P<0.001), and cytochrome C largely released into cytosol from mitochondria. The proportions of EPA and DHA in MMP rapidly elevated while that of arachidonic acid sharply decreased. CONCLUSIONS: omega-3PUFAs inhibit the growth of gastric cancer cells through promoting apoptosis. Compositional and functional alterations in mitochondrial membrane may be an important initiator of apoptosis induced by omega-3PUFAs.

[Article in Chinese]
Source : Zhonghua Wei Chang Wai Ke Za Zhi. 2007 Nov;10(6):570-573. Links

News

---

In evidenza

"L'informazione presente nel sito serve a migliorare, e non a sostituire, il rapporto medico-paziente."

Per coloro che hanno problemi di salute si consiglia di consultare sempre il proprio medico curante.