The Activation State of the Integrin Affects Outside-in Signals Leading to Cell Spreading and Focal Adhesion Kinase Phosphorylation (*)
The Activation State of the Integrin Affects Outside-in Signals Leading to Cell Spreading and Focal Adhesion Kinase Phosphorylation (*)
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整合素的激活状态影响由外而内的信号,导致细胞扩散和局部粘附激酶磷酸化 (*)
DOI:
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发表时间:
1995
影响因子:
4.8
通讯作者:
V. Quaranta
中科院分区:
文献类型:
--
作者:
A. Pelletier;T. Kunicki;Z. Ruggeri;V. Quaranta
Integrins bind extracellular matrix and transduce signals mediating cell adhesion, spreading, and migration. It is unclear how these distinct responses follow from a common event: integrin clustering. We examined the relationship between integrin-mediated signals and the integrin's activation state using a cell line expressing αβ3 (Clone B) and a panel of monoclonal antibodies against this integrin. Nonactivating antibodies used to cluster αβ3 stimulated focal adhesion kinase (FAK) phosphorylation, regardless of affinity, subunit specificity, or ligand-blocking phenotype. Coated on plastic, these antibodies supported cell adhesion, spreading, and FAK phosphorylation. In contrast, clustering of αβ3 induced with activating antibodies, or binding of soluble fibrinogen to antibody-activated αβ3, did not induce FAK phosphorylation. Thus, clustering of αβ3 on Clone B does not necessarily result in FAK phosphorylation. Coated on plastic, activating antibodies supported cell adhesion, but not spreading or FAK phosphorylation. Therefore, it appears the resting, not the active form of αβ3, induces cell spreading and FAK phosphorylation in Clone B. These data indicate that “inside-out” signals may alter not only the binding specificity of an integrin, but the “outside-in” biochemical signals that integrin initiates as well. This activation state-linked signaling represents a novel mechanism, which may explain how diverse cellular responses are induced by integrin-matrix interactions.
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DOI:
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发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Savage,B;Shattil,SJ;Ruggeri,ZM
通讯作者:
Ruggeri,ZM
DOI:
--
发表时间:
1990
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Altieri,DC;Wiltse,WL;Edgington,TS
通讯作者:
Edgington,TS
影响因子:
20.3
作者:
Niiya,K;Hodson,E;Bader,R;Byers-Ward,V;Koziol,JA;Plow,EF;Ruggeri,ZM
通讯作者:
Ruggeri,ZM
影响因子:
11.2
作者:
Schwartz,MA
通讯作者:
Schwartz,MA
DOI:
10.1073/pnas.88.19.8392
发表时间:
1991-10-01
影响因子:
11.1
作者:
KORNBERG, LJ;EARP, HS;JULIANO, RL
通讯作者:
JULIANO, RL