Effects of nutritional status on hormone concentrations of the somatotropin axis and metabolites in plasma and colostrum of Japanese Black cows.
We aimed to determine the effects of nutritional status on concentrations of somatotropic axis hormones (growth hormone (GH) and insulin-like growth factor 1 (IGF-1)), insulin and metabolites (glucose, total protein and nonesterified fatty acids (NEFA)) in the plasma and colostrum in late antepartum cows. Eight pregnant Japanese Black cows were randomly assigned to two experimental groups (n = 4 per group). Control cows (CON) received 100% of their nutritional requirements until parturition, whereas restricted group cows (RES) received 60% of their nutritional requirements. Blood samples were taken during the antepartum period, and blood and colostrum samples were collected on days 0, 1, and 3 after calving. Compared to the CON group, the RES group had higher concentrations of GH and NEFA in plasma, but significantly lower concentrations of glucose and insulin in plasma. The concentrations of GH in plasma after calving were significantly higher, but total plasma protein was significantly lower in RES than in CON cows. Compared to the CON group, the RES group had significantly higher concentrations of GH in colostrum, but significantly lower total concentrations of protein in colostrum. Concentrations of IGF-1 were not different between the two groups. These findings suggest that maternal nutritional status during late gestation influences concentrations of GH and total protein in the blood and colostrum of Japanese Black cows.
Kuju Agricultural Research Center, Kyushu University, Oita, Japan.
Ouanh
O
Phomvisith
Kuju Agricultural Research Center, Kyushu University, Oita, Japan.
Hideyuki
H
Takahashi
Kuju Agricultural Research Center, Kyushu University, Oita, Japan.
Ha Thi
HT
Mai
Kuju Agricultural Research Center, Kyushu University, Oita, Japan.
Yuji
Y
Shiotsuka
Kuju Agricultural Research Center, Kyushu University, Oita, Japan.
Atsuko
A
Matsubara
The Research Center of Animal Science, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima-shi, Hiroshima, Japan.
Toshihisa
T
Sugino
AgResearch Ltd., Hamilton, New Zealand.
Christopher D
CD
Mcmahon
Kuju Agricultural Research Center, Kyushu University, Oita, Japan.
Tetsuji
T
Etoh
Kuju Agricultural Research Center, Kyushu University, Oita, Japan.
Ryoichi
R
Fujino
Kuju Agricultural Research Center, Kyushu University, Oita, Japan.
Mitsuhiro
M
Furuse
Kuju Agricultural Research Center, Kyushu University, Oita, Japan.
Takafumi
T
Gotoh
D000824:Animal Nutritional Physiological Phenomena / Q000502:physiology*; D000818:Animals; D001786:Blood Glucose; D001798:Blood Proteins / Q000378:metabolism; D002417:Cattle / Q000378:metabolism*; D003126:Colostrum / Q000378:metabolism*; D005230:Fatty Acids, Nonesterified / Q000097:blood / Q000378:metabolism; D005260:Female; D005947:Glucose / Q000378:metabolism; D013006:Growth Hormone / Q000097:blood* / Q000378:metabolism*; D007328:Insulin / Q000097:blood / Q000378:metabolism; D007334:Insulin-Like Growth Factor I / Q000378:metabolism*; D009752:Nutritional Status / Q000502:physiology*; D011247:Pregnancy
D001786:Blood Glucose; D001798:Blood Proteins; D005230:Fatty Acids, Nonesterified; D007328:Insulin; D007334:Insulin-Like Growth Factor I; D013006:Growth Hormone; D005947:Glucose
Japanese Black cow; colostrum; late gestation; nutrition; somatotropic axis