| Registro completo |
| Provedor de dados: |
PAB
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| País: |
Brazil
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| Título: |
Insulin-like growth factor and growth hormone receptor in postpartum lactating beef cows
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| Autores: |
Schneider,Augusto
Pfeifer,Luiz Francisco Machado
Hax,Lucas Teixeira
Paludo,Giane Regina
Pino,Francisco Augusto Burkert Del
Dionello,Nelson José Laurino
Corrêa,Marcio Nunes
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| Data: |
2010-08-01
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| Ano: |
2010
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| Palavras-chave: |
Bos indicus
Bos taurus
GHR
IGF-I
MRNA hepatic expression
Ovulation
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| Resumo: |
The objective of this study was to evaluate the plasma concentrations of insulin-like growth factor-I (IGF-I), and the mRNA hepatic expression of IGF-I and of the growth hormone receptors GHR and GHR 1A, in postpartum beef cows. Four Angus and four crossbred (Angus x Nelore) postpartum suckled beef cows were used. Liver and blood samples were collected every 10 days, from calving to 40 days postpartum, for gene expression and for β-hydroxybutyrate and IGF-I assays, respectively. Samples for progesterone assay were collected every other day, from day 10 to 40 postpartum. Three cows ovulated before 40 days postpartum. IGF-I concentration was higher in Angus x Nelore than in Angus cows. There was no difference in the expression of GHR, GHR 1A and IGF-I according to breed or ovulatory status. IGF-I concentrations were higher in crossbred cows, but have not changed according to postpartum ovulatory status. Moreover, changes in postpartum IGF-I concentrations are not associated with changes in liver GHR, GHR 1A and IGF-I mRNA expression in either breed.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000800019
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| Editor: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
Pesquisa Agropecuária Brasileira
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| Relação: |
10.1590/S0100-204X2010000800019
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| Formato: |
text/html
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| Fonte: |
Pesquisa Agropecuária Brasileira v.45 n.8 2010
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| Direitos: |
info:eu-repo/semantics/openAccess
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