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The growth hormone (GH) response to GH-releasing hormone (GHRH) is strongly inhibited by previous administration of recombinant human GH (rhGH), likely as a consequence of a somatostatin-mediated GH negative autofeedback. Hexarelin (HEX), a synthetic hexapeptide belonging to the GH-releasing peptide (GHRP) family, possesses a GH-releasing activity greater than that of GHRH both in animals and in man...
Increased free fatty acid (FFA) levels of obese patients are likely involved in the pathogenesis of the growth hormone (GH) hyposecretion of obesity. To clarify their role, we studied the influence of inhibition of plasma FFA levels, induced by 500 mg oral acipimox (ACX), an antilipolytic drug, on the GH response to GH-releasing hormone (GHRH) alone or combined with arginine ([ARG] study A) in six...
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