共 64 条
PDE4-regulated cAMP degradation controls the assembly of integrin-dependent actin adhesion structures and REF52 cell migration
被引:41
作者:

Fleming, YM
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机构: Univ Glasgow, Inst Biol & Life Sci, Glasgow G12 8QQ, Lanark, Scotland

Frame, MC
论文数: 0 引用数: 0
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机构: Univ Glasgow, Inst Biol & Life Sci, Glasgow G12 8QQ, Lanark, Scotland

Houslay, MD
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h-index: 0
机构: Univ Glasgow, Inst Biol & Life Sci, Glasgow G12 8QQ, Lanark, Scotland
机构:
[1] Univ Glasgow, Inst Biol & Life Sci, Glasgow G12 8QQ, Lanark, Scotland
[2] Beatson Inst Canc Res, Glasgow G61 1BD, Lanark, Scotland
基金:
英国医学研究理事会;
关键词:
phosphodiesterase;
rolipram;
actin;
RhoA;
D O I:
10.1242/jcs.01096
中图分类号:
Q2 [细胞生物学];
学科分类号:
071009 ;
090102 ;
摘要:
Plating of REF52 cells onto extracellular matrix components leads to the formation of integrin-dependent actin adhesion microspikes. We show that the formation of these structures is sensitive to chemical agents that regulate cAMP levels, such as forskolin and IBMX. In particular, by using the specific inhibitor rolipram, we identify the PDE4 family of cAMP-specific phosphodiesterases as critical regulators of this process. The effect of PDE4 on microspike formation is mediated by actions exerted through the activation of PKA - rather than through the alternative cAMP effector, Epac. We provide evidence that peripheral microspikes are RhoA-, ROCK- and myosin-dependent, and that this pathway is suppressed by PDE4 inhibition. In addition, PDE4 inhibition impairs cell locomotion that requires dynamic protrusion and retraction of peripheral spike structures. Our data demonstrate that PDE4 activity is a key modulator of integrin-induced actin assembly at the cell periphery which, in turn, controls cell migration.
引用
收藏
页码:2377 / 2388
页数:12
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