title: Circadian variations in plasma LH and FSH in juvenile and adult male mice.
abstract: Experiments were performed to ascertain circadian fluctuations in plasma levels of LH and FSH in juvenile and adult male mice. Animals under natural lighting (11 h day/13 h night) were killed at 1-hour intervals over a 24-hour period. There were large variations in plasma LH concentrations between animals sacrificed within each killing period. Baseline LH levels (values lower than 60 ng/ml) showed a significant 24-hour periodicity in adult males. FSH concentrations exhibited significant diurnal variations in juvenile and adult males. There was significant influence of age on the temporal pattern and 24-hour mean plasma hormone levels.
authors.forename: C
authors.initials: C
authors.lastname: Jean-Faucher
authors.forename: M
authors.initials: M
authors.lastname: Berger
authors.forename: M
authors.initials: M
authors.lastname: de Turckheim
authors.forename: G
authors.initials: G
authors.lastname: Veyssière
authors.forename: C
authors.initials: C
authors.lastname: Jean
mesh_terms: D000375:Aging; D000818:Animals; D002940:Circadian Rhythm; D005640:Follicle Stimulating Hormone / Q000097:blood*; D007986:Luteinizing Hormone / Q000097:blood*; D008297:Male; D051379:Mice; D011863:Radioimmunoassay
chemical_list: D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone