Dystrophin Dp71 is critical for stability of the DAPs in the nucleus of PC12 cells.

Abstract:

:We have adopted the PC12 cell line as in vitro cell model for studying Dp71 function in neuronal cells. These cells express a cytoplasmic (Dp71f) and a nuclear (Dp71d) isoform of Dp71 as well as various dystrophin-associated proteins (DAPs). In this study, we revealed by confocal microscopy analysis and Western blotting evaluation of cell fractions the presence of different DAPs (beta-dystroglycan, beta-dystrobrevin, epsilon-sarcoglycan and gamma1-syntrophin) in the nucleus of PC12 cells. Furthermore, we established by immunoprecipitation assays that Dp71d and the DAPs form a dystrophin-associated protein complex (DAPC) in the nucleus. Interestingly, depletion of Dp71 by antisense treatment (antisense-Dp71 cells) provoked a drastic reduction of nuclear DAPs, which indicates that Dp71d is critical for DAPs stability within the nucleus. Although Up71, the utrophin gene product homologous to Dp71, exhibited increased expression in the antisense-Dp71 cells, its scarce nuclear levels makes unlikely that could compensate for Dp71 nuclear deficiency.

journal_name

Neurochem Res

journal_title

Neurochemical research

authors

Villarreal-Silva M,Suárez-Sánchez R,Rodríguez-Muñoz R,Mornet D,Cisneros B

doi

10.1007/s11064-009-0064-z

subject

Has Abstract

pub_date

2010-03-01 00:00:00

pages

366-73

issue

3

eissn

0364-3190

issn

1573-6903

journal_volume

35

pub_type

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