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Abstract Title:

HMG-CoA reductase inhibitor induces a transient activation of high affinity nerve growth factor receptor, trk, and morphological differentiation with fatal outcome in PC12 cells.

Abstract Source:

Brain Res. 2000 Mar 17 ;859(1):169-72. PMID: 10720627

Abstract Author(s):

T Kumano, T Mutoh, H Nakagawa, M Kuriyama

Article Affiliation:

Second Department of Internal Medicine, Division of Neurology, Faculty of Medicine, Fukui Medical University, 23-Shimoaizuki, Matsuoka-cho, Fukui, Japan.

Abstract:

The present study was aimed at investigating the possible toxicity of simvastatin on a neuronal cell line, PC12 cells. Simvastatin clearly induced a transient morphological differentiation as evidenced by the occurrence of neurite outgrowth with a transient activation of the high affinity nerve growth factor receptor, Trk, but died at 36 h after its addition. Tyrosine autophosphorylation of the Trk protein also disappeared at 36 h after addition. During the morphological differentiation, NGF mRNA expression was upregulated transiently and returned to the basal level at 36 h after addition of simvastatin. These results suggest that simvastatin is neurotoxic and PC12 cells elicited a protective response, involving a transient activation of a Trk-mediated intracellular signal transduction pathway by an autocrine secretion of NGF, although these responses did not persist against pro-apoptotic signals and resulted in an apoptosis of the PC12 cells.

Study Type : In Vitro Study

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Sayer Ji
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