Galanin influences vasopressin and oxytocin release from the hypothalamo-neurohypophysial system of salt-loaded rats

• Autorzy: Cisowska-Maciejewska A. , Ciosek J.
• Języki publikacji: EN

Abstrakty

EN

Galanin is a peptide present in the nervous system and peripheral tissues which exerts a broad range of physiological functions. The influence of centrally administered galanin (Gal; 100 pM i.c.v.) on arginine vasopressin (AVP) and oxytocin (OT) content in the hypothalamus and neurohypophysis as well as on their blood plasma concentration was estimated in male Wistar rats drinking ad libitum 2% solution of natrium chloride per 48 hours. In euhydrated rats and subsequently applied i.c.v. with Gal a significant fall in the hypothalamic and neurohypophysial content of OT but not AVP was observed, however, without simultaneous changes in these neurohormones blood plasma concentration. On the contrary, i.c.v. injection of Gal to salt-loaded rats caused a marked raise in AVP and OT level in the hypothalamus and neurohypophysis with subsequent diminution of both neurohormones concentration in blood plasma. These results suggest that in euhydrated rats Gal has an inhibitory influence on the biosynthesis as well as axonal transport of OT, but not AVP. On the contrary, in salt-loaded rats galanin restricts secretion of both neurohormones into the systemic circulation.

Słowa kluczowe

EN

galanin; hypothalamo-neurohypophysial system; vasopressin; nervous system; rat; peripheral tissue; oxytocin release

• Wydawca: -
• Czasopismo: Journal of Physiology and Pharmacology
• Rocznik: 2005
• Tom: 56
• Numer: 4
• Opis fizyczny: p.673-688,fig.,ref.

Twórcy

autor

Cisowska-Maciejewska A.

• Medical University of Lodz, Narutowicza Street 60, 90-136 Lodz, Poland

autor

Ciosek J.