Role of p38MAPK in mediating TNF-α-induced apoptosis of rat glioma cell line C6

Objective: To study the role of p38MAPK in mediating TNF-α-induced apoptosis of rat glioma cell line C6. Methods: Effect of TNF-α on the proliferation of C6 cells was determined by MTT assay. The TNF-α induced apoptosis was detected by transmission electron microscopy and flow cytometry. The expression of p38MAPK was detected by SABC method and Western-blot. The effect of SB202190, a specific inhibitor of p38MAPK, on TNF-α-induced apoptosis was observed by flow cytometry and SABC method. Results: Inhibitory rate of TNF-α(2×105 U/L) on C6 cells was 43. 75% . In the TNF-α treated group, apoptotic cells were observed by transmission electron microscopy and the apoptotic rate was 37. 5% by flow cytometry. p38MAPK positive signals were detected by SABC method and Western-blot. In the SB202190 treated group, the apoptotic rate was 7. 0% and no p38MAPK signals were found. Conclusion: Apoptosis of C6 cells and expression of p38MAPK can be induced by TNF-α. The activation of p38MAPK promotes the apoptosis of C6 cells.