title: Diurnal change in plasma natriuretic factor and arginine vasopressin in young jersey calves.
abstract: Diurnal changes in plasma ANF and AVP levels were investigated in four calves under standardized conditions. Both levels in plasma were measured at hourly intervals for 24 h along with arterial blood pressure, blood haematocrit, plasma cGMP, sodium, potassium, osmolality, proteins and albumin. Plasma ANF exhibited a first peak at mid-day while plasma AVP was low and a second peak at evening while plasma AVP was high. Changes in plasma cGMP correlated with variations in plasma ANF. feeding and/or plasma volume elevation probably accounted for both peaks in plasma ANF and the low mid-day level of plasma AVP, but the rise in plasma AVP at evening may represent a diurnal rhythm.
authors.affiliation: Laboratoire de Physiologie Médicale, Faculté de Médecine, Besancon, France.
authors.forename: J P
authors.initials: JP
authors.lastname: Wolf
authors.forename: M J
authors.initials: MJ
authors.lastname: Davicco
authors.forename: J
authors.initials: J
authors.lastname: Giry
authors.forename: J P
authors.initials: JP
authors.lastname: Barlet
mesh_terms: D000818:Animals; D001127:Arginine Vasopressin / Q000097:blood*; D009320:Atrial Natriuretic Factor / Q000097:blood*; D001794:Blood Pressure; D001798:Blood Proteins / Q000032:analysis; D002417:Cattle; D002940:Circadian Rhythm / Q000502:physiology*; D006157:Guanosine Monophosphate / Q000097:blood; D006400:Hematocrit; D008297:Male; D009994:Osmolar Concentration; D011188:Potassium / Q000097:blood; D011863:Radioimmunoassay; D012964:Sodium / Q000097:blood
chemical_list: D001798:Blood Proteins; D001127:Arginine Vasopressin; D006157:Guanosine Monophosphate; D009320:Atrial Natriuretic Factor; D012964:Sodium; D011188:Potassium