Objective: To investigate the role of mitochondria in TBMS1-medited apoptosis of human cervical carcinoma HeLa cell line.
Method: Mitochondrial transmembrane potentia (deltapsim) was assayed by flow cytometry. Apoptotic induction by TBMS1 was determined by gel electrophoresis of fragmented DNA. Cytochrome c (Cyt c) was detected by Western blotting.
Result: The results showed that TBMS1 induced apoptosis in HeLa cells, that TBMS1 decreased deltapsim and facilitated Cyt c release, and that TBMS1 induced apoptosis of HeLa cells dose-and time-dependently in accordance with increase of cytosolic Cyt c. TBMS1 had direct effect on isolated rat mitochondria which induced a time- and dose-dependent release of Cyt c from mitochondria. The results also showed that CsA protected partly HeLa cells from the effect of TBMS1.
Conclusion: The mitochondrial apoptosis pathway has effects on TBMS1 induced human cervical carcinoma HeLa cell line apoptosis.