Stage-specific functional roles of integrins in murine erythropoiesis.
Exp Hematol
; 42(5): 404-409.e4, 2014 May.
Article
em En
| MEDLINE
| ID: mdl-24463276
ABSTRACT
When the erythroid integrins α5ß1 and α4ß1 were each deleted previously at the stem cell level, they yielded distinct physiologic responses to stress by affecting erythoid expansion and terminal differentiation or only the latter, respectively. To test at what stage of differentiation the integrin effects were exerted, we created mice with α4- or α5-integrin deletions only in erythroid cells and characterized them at homeostasis and after phenylhydrazine-induced hemolytic stress. Unlike our prior data, the phenotype of mice with α5-erythroid deletions was similar to controls, especially after stress. These outcomes seem to reconcile divergent prior views on the role of α5-integrin in erythropoiesis. By contrast, α4 integrins whether deleted early or late have a dominant effect on bone marrow retention of erythroblasts and on terminal erythroid maturation at homeostasis and after stress.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Eritroblastos
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Integrina alfa4
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Integrina alfa5
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Eritropoese
Limite:
Animals
Idioma:
En
Revista:
Exp Hematol
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Estados Unidos