Regulation of the alternative splicing of sarcoplasmic reticulum Ca²âº-ATPase1 (SERCA1) by phorbol 12-myristate 13-acetate (PMA) via a PKC pathway.
Biochem Biophys Res Commun
; 423(2): 212-7, 2012 Jun 29.
Article
em En
| MEDLINE
| ID: mdl-22609207
ABSTRACT
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 Ca(2+)-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 1.5h promoted aberrant splicing. These two responses showed dose dependency and were completely abolished by the PKC inhibitor Ro 31-8220. Furthermore, repression of PKCßII and PKCθ 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.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteína Quinase C
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Processamento Alternativo
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Proteína Quinase C-delta
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ATPases Transportadoras de Cálcio do Retículo Sarcoplasmático
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Distrofia Miotônica
Limite:
Humans
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article