Insulin-like growth factor-I improves glucose and lipid metabolism in type 2 diabetes mellitus.
J Clin Invest
; 90(6): 2234-41, 1992 Dec.
Article
em En
| MEDLINE
| ID: mdl-1469083
ABSTRACT
Hyperglycemia, hyperinsulinemia, and insulin resistance cause vascular disease in type 2 diabetes mellitus. Dietary treatment alone often fails and oral drugs or insulin enhance hyperinsulinemia. In previous studies, an intravenous bolus of recombinant human insulin-like growth factor-I (rhIGF-I) caused normoglycemia in insulin-resistant diabetics whereas rhIGF-I infusions lowered insulin and lipid levels in healthy humans, suggesting that rhIGF-I is effective in insulin-resistant states. Thus, eight type 2 diabetics on a diet received on five treatment days subcutaneous rhIGF-I (2 x 120 micrograms/kg) after five control days. Fasting and postprandial glucose, insulin, C-peptide, proinsulin, glucagon, triglyceride, insulin-like growth factor-I and -II, and growth hormone levels were determined. RhIGF-I administration increased total IGF-I serum levels 5.3-fold above control. During the control period mean (+/- SD) fasting glucose, insulin, C-peptide, and total triglyceride levels were 11.0 +/- 4.3 mmol/liter, 108 +/- 50 pmol/liter, 793 +/- 250 pmol/liter, and 3.1 +/- 2.7 mmol/liter, respectively, and decreased during treatment to a nadir of 6.6 +/- 2.5 mmol/liter, 47 +/- 18 pmol/liter, 311 +/- 165 pmol/liter, and 1.6 +/- 0.8 mmol/liter (P < 0.01), respectively. Postprandial areas under the glucose, insulin, and C-peptide curve decreased to 77 +/- 13 (P < 0.02), 52 +/- 11, and 60 +/- 9% (P < 0.01) of control, respectively. RhIGF-I decreased the proinsulin/insulin ratio whereas glucagon levels remained unchanged. The magnitude of the effects of rhIGF-I correlated with the respective control levels. Since rhIGF-I appears to improve insulin sensitivity directly and/or indirectly, it may become an interesting tool in type 2 diabetes and other states associated with insulin resistance.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fator de Crescimento Insulin-Like I
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Diabetes Mellitus Tipo 2
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Metabolismo dos Lipídeos
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Glucose
Limite:
Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
J Clin Invest
Ano de publicação:
1992
Tipo de documento:
Article
País de afiliação:
Suíça