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Brain Research 1987-Aug

Clonidine modulates the ventrolateral medullary catechol metabolic hyperactivity induced by hypotension.

Samo registrirani uporabniki lahko prevajajo članke
Prijava / prijava
Povezava se shrani v odložišče
J Y Gillon
L Quintin
M Ghignone
J F Pujol

Ključne besede

Povzetek

In vivo electrochemistry allowed recording of a catechol oxidation current in the ventrolateral medulla, caudal to the obex, in anesthetized rats whose ventilatory, metabolic and hemodynamic parameters were rigorously controlled. Hemorrhage or controlled hypotension induced an increase in the metabolism of catecholamines in the A1 noradrenergic group, which remained activated after full hemodynamic recovery. Clonidine (200 micrograms.kg-1 i.p.) given 30 min prior to hemorrhage or immediately before controlled hypotension suppressed partially the increased metabolism of catecholamines especially during the recovery period. This suggests that clonidine preserved phasic reactivity upon circulatory disturbances and decreased tonic hyperactivity following circulatory recovery.

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