PDGF-induced airway smooth muscle proliferation is associated with Human antigen R activation and could be weakened by AMPK activation.

Abstract:

:CyclinD1 over-expression is the key pathogenetic event underlying airway smooth muscle (ASM) proliferation. Human antigen R (HuR) is a ubiquitously expressed RNA-binding protein, and is known to regulate the expression of multiple cell cycle regulators. The aim of the study is to investigate whether HuR might also be involved in ASM proliferation. In cultured ASM cells, PDGF treatment induced a significant elevation of HuR expression at both mRNA and protein levels. Immunofluorescence analysis demonstrated PDGF might promote HuR translocation from nucleus to cytoplasma as well. RNA-interference of HuR effectively decreased PDGF-induced cyclinD1 over-expression in ASM cells. Furthermore, AMPK activation by AICAR could effectively decrease PDGF-induced HuR cytoplasmatic translocation, cyclinD1 expression and ASM cells proliferation. In conclusion, altered expression and activity of HuR might participate in PDGF-induced ASM cells cyclinD1 expression and proliferation. The effectiveness of AMPK activation indicated a novel intervention method for airway remodeling.

journal_name

Mol Biol Rep

authors

Zhang P,Cao M,Liu Y,Lv Z,Yang Q,Lin X,Li H,Wan Q

doi

10.1007/s11033-011-1392-z

subject

Has Abstract

pub_date

2012-05-01 00:00:00

pages

5819-29

issue

5

eissn

0301-4851

issn

1573-4978

journal_volume

39

pub_type

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