Somatomedin C (insulin-like growth factor 1) levels decrease during acute changes of stress related hormones. Relevance for fibromyalgia.

Ferraccioli, G; Guerra, P; Rizzi, V; Baraldo, M; Salaffi, F; Furlanut, M; Bartoli, E · J Rheumatol · 1994

basic_science · Level V

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Abstract

To determine the effects of stress hormones on insulin-like growth factor 1 (IGF-1). Insulin induced hypoglycemia (< 3 mmol/l) and clonidine induced depression of noradrenergic tone were used to assess the acute effects of cortisol, human growth hormone (hGH), and norepinephrine (NE). Despite the increase of hGH during hypoglycemia, a statistically significant decrease of IGF-1 was observed along with the expected rise of cortisol and NE. To eliminate the role played by NE, NE tone was depressed by administering clonidine. A statistically significant decrease of IGF-1 was also observed. Acute cortisol release or a NE decrease induce low IGF-1 levels.

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