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Effect of the Integrin β3 Cytoplasmic NITY Motif on α II bβ3-Mediated Cell Functions in CHO Cell Model / 中国实验血液学杂志
Journal of Experimental Hematology ; (6): 768-773, 2015.
Artigo em Chinês | WPRIM | ID: wpr-357274
ABSTRACT
<p><b>UNLABELLED</b>OBJLECTIVE To investigate the effect of integrin β3 cytoplasmic NITY motif on αIIbβ3-mediated cell functions.</p><p><b>METHODS</b>Stable Chinese hamster ovary (CHO) cell lines that co-express human wild type integrin αIIb and wild type β3 or mutant β3&Delta;NITY (β3 deleting cytoplasmic NITY motif) were established. Expression of αIIb and β3 were tested by Western blot and flow cytometry in CHO cell lines. Spreading and adhesion of stable cell lines on immobilized fibrinogen were examined. The co-immunoprecipitation was used to detect protein interactions.</p><p><b>RESULTS</b>CHO-αIIbβ3, CHO-αIIbβ3&Delta;NITY cells were successfully established. The CHO cells transfected with wild type αIIbβ3 had the ability of adhesion and spreading. Compared with CHO-αIIbβ3 cells, CHO-αIIbβ3&Delta;NITY cells showed an impaired capacity of adhesion but no significant difference was observed in spreading of adhered cells. The co-immunoprecipitation showed that kindlin-2 associated with wild type integrin αIIbβ3. The β3&Delta;NITY mutation substantially reduced kindlin-2 association.</p><p><b>CONCLUSION</b>Deletion of NITY motif causes an impaired ability of adhesion. The deletion mutation can suppress kindlin-2 binding to integrin β3, thereby partially inhibit the integrin β3 signaling.</p>
Assuntos
Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Fibrinogênio / Transdução de Sinais / Cricetulus / Células CHO / Estrutura Terciária de Proteína / Complexo Glicoproteico GPIIb-IIIa de Plaquetas / Integrina alfa2 / Integrina beta3 Tipo de estudo: Estudo prognóstico Limite: Animais / Humanos Idioma: Chinês Revista: Journal of Experimental Hematology Ano de publicação: 2015 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Fibrinogênio / Transdução de Sinais / Cricetulus / Células CHO / Estrutura Terciária de Proteína / Complexo Glicoproteico GPIIb-IIIa de Plaquetas / Integrina alfa2 / Integrina beta3 Tipo de estudo: Estudo prognóstico Limite: Animais / Humanos Idioma: Chinês Revista: Journal of Experimental Hematology Ano de publicação: 2015 Tipo de documento: Artigo