Serum leptin levels during the periparturient period in cows |
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| Authors: | Soliman Mohamed Ishioka Katsumi Yoshida Ryusuke Komabayashi Kenichi Hatai Hitoshi Matsui Yoshitaka Hirai Tuneo Katagiri Seiji Takahashi Yoshiyuki Kawakita Yumi Abe Hiroyuki Kitamura Hiroshi Kimura Kazuhiro Saito Masayuki |
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| Institution: | Laboratory of Biochemistry, Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan. |
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| Abstract: | Serum leptin concentrations were measured in antenatal and postnatal cows housed at two different locations. The mean serum leptin concentration was 9.2 +/- 0.6 ng/m l (n=22) in one group, and was slightly lower in the other (7.4 +/- 0.4 ng/ml, n=54), probably because of the different nutritional conditions between the two groups. There was no consistent variation in relation to the menstrual cycle and the periparturient period in both groups. Moreover, serum leptin concentrations during the periparturient period were independent of the number of delivery and the incidence of mastitis and milk fever. These results are quite different from those in rodents and human, suggesting the different regulatory mechanism of circulating leptin concentration in cows. |
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