title: Diurnal variations in the plasma concentration of parathyroid hormone in dogs.
abstract: The plasma concentrations of parathyroid hormone (PTH), ionised calcium (Ca(2+)), total calcium, albumin and inorganic phosphorus, and the pH were measured in blood samples obtained from nine dogs during a period of 26 hours. The plasma pth levels fluctuated slightly during the day, by about 20 pg/ml, but there was a distinct peak (42.8 [8.8] pg/ml) at 07.00. Plasma Ca(2+) showed a diurnal pattern in which two peaks (increases of 0.03 mmol/l) were observed at 05.00 and 17.00, and the plasma concentration of inorganic phosphorus showed a similar pattern. There were no diurnal changes in total calcium or albumin.
authors.affiliation: Departamento Medicina y Cirugía Animal, Universidad de Córdoba, Campus Rabanales, Ctra Madrid-Cádiz km 396, 14014 Córdoba, Spain.
authors.forename: I
authors.initials: I
authors.lastname: López
authors.forename: E
authors.initials: E
authors.lastname: Aguilera-Tejero
authors.forename: J C
authors.initials: JC
authors.lastname: Estepa
authors.forename: S
authors.initials: S
authors.lastname: Bas
authors.forename: R
authors.initials: R
authors.lastname: Mayer-Valor
authors.forename: A
authors.initials: A
authors.lastname: Jiménez
authors.forename: M
authors.initials: M
authors.lastname: Rodríguez
mesh_terms: D000818:Animals; D001774:Blood Chemical Analysis / Q000662:veterinary; D002118:Calcium / Q000097:blood; D002940:Circadian Rhythm; D004285:Dogs / Q000097:blood*; D005260:Female; D006863:Hydrogen-Ion Concentration; D008297:Male; D010281:Parathyroid Hormone / Q000097:blood*; D010758:Phosphorus / Q000097:blood; D012709:Serum Albumin / Q000032:analysis
chemical_list: D010281:Parathyroid Hormone; D012709:Serum Albumin; D010758:Phosphorus; D002118:Calcium