Insulin-like growth factor and growth hormone receptor in postpartum lactating beef cows
نویسندگان
چکیده
منابع مشابه
Circulating Insulin-Like Growth Factor I, Insulin-Like Growth Factor Binding Proteins, Growth Hormone, and Resumption of Estrus in Postpartum Cows Subjected to Dietary Energy Restriction1
The objective of this study was to determine whether serum concentrations of growth hormone ( GH) , IGF-I, IGF binding proteins (IGFBP), and glucose at wk 2 and 10 postpartum were associated with the ability of postpartum beef cows to resume cycling when maintained on a limited nutrient environment. Cows (n = 29) were individually fed either 130 or 170 kcal ME × BW−.75 × d−1 during nonlactation...
متن کاملCirculating insulin-like growth factor I, insulin-like growth factor binding proteins, growth hormone, and resumption of estrus in postpartum cows subjected to dietary energy restriction.
The objective of this study was to determine whether serum concentrations of growth hormone (GH), IGF-I, IGF binding proteins (IGFBP), and glucose at wk 2 and 10 postpartum were associated with the ability of postpartum beef cows to resume cycling when maintained on a limited nutrient environment. Cows (n = 29) were individually fed either 130 or 170 kcal ME x BW-75 x d-1 during nonlactation an...
متن کاملEffect of active immunization against growth hormone releasing factor on concentrations of somatotropin and insulin-like growth factor I in lactating beef cows.
Two experiments were conducted to determine the effects of immunoneutralization of growth hormone-releasing factor [GRF(1-29)-NH2] on concentrations of somatotropin (ST) and insulin-like growth factor I (IGF-I) in lactating beef cows. In Experiment 1, multiparous Hereford cows were immunized against 2 mg GRF(1-29)-(Gly)4-Cys-NH2 conjugated to human serum albumin (GRFi, n = 3) or 2 mg human seru...
متن کاملRelationship between serum insulin-like growth factor-I and genotype during the postpartum interval in beef cows.
The objective of this study was to determine the effect of genotype and week postpartum on serum concentrations of IGF-I, body condition score (BCS), BW, and ovarian function in beef cows. Cows from the following genotypes were utilized in two consecutive years: Angus (A x A; n = 9), Brahman (B x B; n = 10), Charolais (C x C; n = 12), Angus x Brahman (A x B; n = 22), Brahman x Charolais (B x C;...
متن کاملGrowth Hormone and Insulin-Like Growth Factor-1.
Human growth hormone (GH) was first isolated from the human pituitary gland in 1945 and found to promote the growth of children with hypopituitarism. Since the formation of the World Anti-Doping Association, human GH has appeared on the list of forbidden substances. There is a significant amount of anecdotal evidence that human GH is misused by athletes to enhance performance, and there have be...
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ژورنال
عنوان ژورنال: Pesquisa Agropecuária Brasileira
سال: 2010
ISSN: 0100-204X
DOI: 10.1590/s0100-204x2010000800019