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篇目详细内容 |
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【篇名】 |
Effect of inhibiting tyrosine kinase Src expression on protein phosphatase 2A and tau phosphorylation |
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【刊名】 |
Frontiers of Medicine in China |
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【刊名缩写】 |
Front. Med. China |
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【ISSN】 |
1673-7342 |
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【EISSN】 |
1673-7458 |
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【DOI】 |
10.1007/s11684-008-0044-8 |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2008 |
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【卷期】 |
2
卷3期 |
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【页码】 |
235-238
页,共
4
页 |
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【作者】 |
LIUΔ Rong;
ZENGΔ Ji;
ZHOU Xinwen;
PEI Jinjing;
WANG Jianzhi;
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【关键词】 |
Src kinase; protein phosphatase 2A; tau protein; Alzheimer’s disease |
【摘要】 |
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1The aim of this study is to investigate the effect of tyrosine kinase Src on Tyrosine 307(Y307) phosphorylation, protein phosphatase 2A (PP2A) activity, and on tau phosphorylation. Specific Src siRNA was transfected into cultured mouse neuroblastoma N2a cells to inhibit the expression of Src protein, and the phosphorylation levels of PP2A Y307 and tau at different sites, as well as PP2A activity were detected at different time points after siRNA transfection. Twelve hours after siRNA transfection, the protein level of Src was dramatically decreased, with decreased PP2A Y307 phosphorylation. However, the total PP2A protein level was also decreased, together with a decreased PP2A activity. Tau was hyperphosphorylated at the Ser198/199/202 sites. Multiple factors may be involved in the cellular regulation of PP2A activity. Inhibiting Src expression could induce inactivation of PP2A and tau hyperphosphorylation. |
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