Effects of an Acute Bolus Growth Hormone Infusion on the Human Immune System

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Abstract
This study was performed to examine the in vivo effects of a bolus of recombinant human growth hormone (r-hGH) on the human immune system. In a double blind placebo controlled cross over study, healthy volunteers were given 2 IU r-hGH as an intravenous infusion. r-hGH did not influence the subpopulations of blood mononuclear cells (BMNC), natural killer cell activity, in vitro proliferative responses or production of interleukin-1α (IL-1α), IL-1β, IL-2, IL-6, IL-8, tumor necrosis factor α (TNFα), TNFβ or interferon γ in supernatants from BMNC stimulated with either lipopolysaccharide or phytohemagglutinin. However, two h after infusion a significant neutrocytosis occurred. It is concluded that a bolus infusion of r-hGH to healthy volunteers exerts only minor effects on the human immune system.

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