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LPS-stimulating astrocyte-conditioned medium causes neuronal apoptosis via increasing CDK11(p58) expression in PC12
Xiaojuan Liu1, Chun Cheng, Bai Shao
1Department of Pathogen Biology, Medical College, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China.
Abstract:
Activation of astrocytes in central nervous system inflammation leads to a disturbance of crosstalk between astrocytes and neurons, and that this may contribute to the death of neurons. CDK11(p58) is a member of the large family of p34cdc2-related kinases. It specifically expresses in G2/M phase of the cell cycle and is closely related to cell cycle arrest and apoptosis. Here, we show that astrocyte-conditioned medium stimulated by lipopolysaccharide upregulates CDK11(p58) expression and meanwhile causes neuronal apoptosis. CDK11(p58) knockdown in PC12 cells represses neuronal apoptosis. CDK11(p58) overexpression in PC12 cells promotes neuronal apoptosis. AKT signaling pathway is involved in CDK11(p58)-induced neuronal apoptosis process.
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