AKT serine/threonine protein kinase modulates baicalin-triggered autophagy in human bladder cancer T24 cells

作者：Lin Chingju; Tsai Shih Chang; Tseng Michael T; Peng Shu Fen; Kuo Sheng Chu; Lin Meng Wei; Hsu Yuan Man; Lee Miau Rong; Amagaya Sakae; Huang Wen Wen; Wu Tian Shung; Yang Jai Sing^*

来源：International Journal of Oncology, 2013, 42(3): 993-1000.

DOI：10.3892/ijo.2013.1791

• baicalin
• autophagy
• AKT
• traditional Chinese medicine
• T24 cells

Baicalin is one of the major compounds in the traditional Chinese medicinal herb from Scutellaria baicalensis Georgi. We investigated the molecular mechanisms of cell autophagy induced by baicalin in human bladder cancer T24 cells. Baicalin inhibited cell survival as shown by MTT assay and increased cell death by trypan blue exclusion assay in a concentration-dependent manner. Baicalin did not induce apoptotic cell death in T24 cells by TUNEL and caspase-3 activity assay. Baicalin induced the acidic vesicular organelle cell autophagy marker, manifested by acridine orange (AO) and monodansylcadaverine (MDC) staining and cleavage of microtubule-associated protein 1 light chain 3 (LC3). The protein expression levels of the Atg 5, Atg 7, Atg 12, Beclin-1 and LC3-II were upregulated in T24 cells after baicalin treatment. Inhibition of autophagy by 3-methyl-adenine (an inhibitor of class III phosphatidylinositol-3 kinase; 3-MA) reduced the cleavage of LC3 in T24 cells after baicalin treatment. Furthermore, protein expression levels of phospho-AKT (Ser473) and enzyme activity of AKT were downregulated in T24 cells after baicalin treatment. In conclusion, baicalin triggered cell autophagy through the AKT signaling pathway in T24 cells.

• 出版日期2013-3
• 单位中国医科大学