☆ 4.6 Article

Regulation of the alternative splicing of sarcoplasmic reticulum Ca2+-ATPase1 (SERCA1) by phorbol 12-myristate 13-acetate (PMA) via a PKC pathway

BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS (2012)

期刊

BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS

卷 423, 期 2, 页码 212-217

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE

DOI: 10.1016/j.bbrc.2012.05.033

关键词

Myotonic dystrophy; Sarcoplasmic/endoplasmic reticulum; Ca2+-ATPase 1 (SERCA1); Alternative splicing; PKC; Phorbol 12-myristate 13-acetate (PMA); CUG-binding protein 1 (CUGBP1)

类别

Biochemistry & Molecular Biology Biophysics

资金

NCNP, Ministry of Health, Labour and Welfare, Japan [23-5]
Grants-in-Aid for Scientific Research [22247030, 12J08975] Funding Source: KAKEN

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Protocol

Reagent

摘要

Myotonic dystrophy type 1 (DM1) is a multi-systemic disease with no established treatment to date. Small, cell-permeable molecules hold the potential to treat DM1. In this study, we investigated the association between protein kinase C (PKC) signaling and splicing of sarcoplasmic reticulum Ca2+-ATPase1 (SERCA1). Our aim was to clarify the mechanisms underlying the regulation of alternative splicing, in order to explore new therapeutic strategies for DM1. By assessing the splicing pattern of the endogenous SERCA1 gene in HEK293 cells, we found that treatment with phorbol 12-myristate 13-acetate (PMA) regulated SERCA1 splicing. Interestingly, treatment with PMA for 48 h normalized SERCA1 splicing, while treatment for 1.5 h promoted aberrant splicing. These two responses showed dose dependency and were completely abolished by the PKC inhibitor Ro 31-8220. Furthermore, repression of PKC beta II and PKC theta by RNAi mimicked prolonged PMA treatment. These results indicate that PKC signaling is involved in the splicing of SERCA1 and provide new evidence for a link between alternative splicing and PKC signaling. (C) 2012 Elsevier Inc. All rights reserved.

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