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- W2047401966 abstract "The effects of metabolic acidosis on growth hormone and IGF-1 are poorly understood. We investigated the effects of chronic metabolic acidosis (induced by administration on NH4Cl, 4.2 mmol/kg body wt/day) on the growth hormone/IGF-1 endocrine axis in 6 normal male volunteers during metabolic balance conditions. NH4Cl administration resulted in hyperchloremic metabolic acidosis with plasma bicarbonate decreasing from 25 +/- 0.4 to 15.5 +/- 0.9 mmol/liter (P < 0.001). Metabolic acidosis significantly decreased serum IGF-1 concentration from 45 +/- 6 to 33 +/- 6 nmol/liter (P = 0.002), while serum IGF binding protein 3 concentration was not affected significantly. The growth hormone response to growth hormone releasing factor administration (1 microgram per kg body wt, intravenous bolus) was enhanced significantly during acidosis. The IGF-1 response to growth hormone administration (0.1 U kg body wt subcutaneously, every 12 hr for 48 hr) was blunted significantly during acidosis. Apparent endogenous serum half-life and metabolic clearance rates of growth hormone were not altered significantly by acidosis. Metabolic acidosis in humans results in a significant decrease in serum IGF-1 concentration without a demonstrable effect on IGF binding protein 3, and is related to a resistance to the hepatocellular action of growth hormone. The primary defect in the growth hormone/IGF-1 axis occurs via an impaired IGF-1 response to circulating growth hormone with consequent diminution of normal negative feedback inhibition of IGF-1 on growth hormone, as evidenced by the exaggerated growth hormone response to growth hormone releasing factor administration." @default.
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- W2047401966 date "1997-01-01" @default.
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- W2047401966 title "Effect of chronic metabolic acidosis on the growth hormone/IGF-1 endocrine axis: new cause of growth hormone insensitivity in humans." @default.
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- W2047401966 doi "https://doi.org/10.1038/ki.1997.26" @default.
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