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- Title
Feeding a High-Concentrate Diet Reduces Milk Production is Associated with Endogenous Growth Hormone in Lactating Goats.
- Authors
Ping Sheng Ye; Lin Li; Yu Long Wu; Yuan Shu Zhang
- Abstract
The aim of this work was to evaluate the effects of endogenous GH-IGF-1 axis on lactating goats fed with high-concentrate diets. Ten lactating goats were used and randomly divided into two groups, in a 2×2 Latin square experiment design with different forage to concentrate rations of 40:60 (the control group) and 60:40 (the high-concentrate group), respectively. During the experiment, milk samples were collected to assay the content of milk compositions; plasma samples were collected to measure the content of IGF-1 and GH. The liver and mammary gland samples were collected to observe the expression of IGF-1R and GH. The results showed that compared with the control group, the content of plasma GH and IGF-1 were decreased in the high-concentrate group, and the percentage of lactose and milk yield were also decreased. Meantime, the mRNA expression of IGF-1R in mammary gland was down-regulated in the high-concentrate group. Our results indicated that feeding with high-concentrate diets for 9 weeks would decrease the contents of endogenous GH and IGF-1, and eventually lead to the decreased milk yield.
- Subjects
REDUCING diets; MILK yield; SOMATOTROPIN; GOATS; LACTATION; SOMATOTROPIN receptors; GOAT diseases; MILK proteins
- Publication
Pakistan Journal of Zoology, 2024, Vol 56, Issue 3, p1225
- ISSN
0030-9923
- Publication type
Article
- DOI
10.17582/journal.pjz/20230216080219