title: Serum leptin levels during the periparturient period in cows.
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.
authors.affiliation: Laboratory of Biochemistry, Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Soliman
authors.forename: Katsumi
authors.initials: K
authors.lastname: Ishioka
authors.forename: Ryusuke
authors.initials: R
authors.lastname: Yoshida
authors.forename: Kenichi
authors.initials: K
authors.lastname: Komabayashi
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Hatai
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Matsui
authors.forename: Tuneo
authors.initials: T
authors.lastname: Hirai
authors.forename: Seiji
authors.initials: S
authors.lastname: Katagiri
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Takahashi
authors.forename: Yumi
authors.initials: Y
authors.lastname: Kawakita
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Abe
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kitamura
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Kimura
authors.forename: Masayuki
authors.initials: M
authors.lastname: Saito
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002417:Cattle / Q000097:blood*; D030762:Estrous Cycle / Q000097:blood; D005260:Female; D007774:Lactation / Q000097:blood; D020738:Leptin / Q000097:blood*; D008414:Mastitis, Bovine / Q000097:blood; D010298:Parity; D010319:Parturient Paresis / Q000097:blood; D036801:Parturition / Q000097:blood*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000097:blood / Q000662:veterinary; D011270:Pregnancy, Animal / Q000097:blood*; D013997:Time Factors
chemical_list: D020738:Leptin