M Al Zein

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The present study examines the effect of opiates on alpha-MSH and beta-endorphin release from perifused neurointermediate rat pituitaries, as stimulated by various secretagogues for which Ca ions and/or cAMP serve as messengers. alpha-MSH release stimulated by high K+ concentrations (5-min pulses) and veratridine depolarization, which is closely dependent(More)
This study examines the effect of leu-enkephalin on K+, veratridine and isoproterenol stimulation of vasopressin (AVP) release from perifused neurointermediate pituitaries of rats. As opposed to catecholamine-evoked release of peptide, the secretory response to high K+ and veratridine involves Ca2+ influx, as the effect of both factors was blocked by(More)
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