title: The relationship between plasma insulin-like growth factor-I (IGF-I) level and body weight in the horse.
abstract: The relationship between plasma insulin-like growth factor-I (IGF-I) level and body weight was studied in six breeds of horse. The correlation coefficients between plasma IGF-I and body weight in males and females of 1 year old heavy horses (Percheron and Breton breeds) were 0.62 and 0.12 respectively. The mean plasma IGF-I of males was higher than that of females (p < 0.01). However, the plasma IGF-I levels of heavy horses did not exceed those of light horses (Thoroughbred) or ponies (Shetland and Falabella). These data suggest that IGF-I is at least related to the difference of body weights between sexes in heavy horses.
authors.affiliation: Department of Animal Physiology, National Institute of Animal Industry, Ibaraki, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Ozawa
authors.forename: H
authors.initials: H
authors.lastname: Inokuma
authors.forename: T
authors.initials: T
authors.lastname: Johke
mesh_terms: D000375:Aging / Q000097:blood / Q000502:physiology*; D000818:Animals; D001835:Body Weight; D005260:Female; D006736:Horses / Q000502:physiology*; D007334:Insulin-Like Growth Factor I / Q000378:metabolism*; D008297:Male; D012727:Sex Characteristics; D013045:Species Specificity
chemical_list: D007334:Insulin-Like Growth Factor I