J Korean Soc Endocrinol.  1996 Mar;11(1):52-60.

Serum Insulin-like Growth Factor-1(IGF-1) and Insulin-like Growth Factor Binding Proteins in Hyperthyroidism and Hypothyroidism

• Song HM
• Park SS
• Park TS
• Baek HS
• Lee DY

Abstract

Background
s: Thyroid hormones play a fundamental role in the initiation and maintenance of somatic growth in mammalian species, and the insulin-like growth factors(IGFs) occupy a position of central importance in the growth of all tissues. To evaluate the changes in serum insulin-like growth factor-I(IGF-I) and insulin-like growth factor binding proteins in hyperthyroid and hypothyroid patients, sera was obtained from 19 hyperthyroid patients, 9 hypothyroid patients, and 10 healthy volunteers. Methods: IGF-I concentration was determined by radioimmunoassay, and changes in IGFBPs were assesed by Western Ligand Blotting. To evaluate the binding pattern of IGF-I & IGFBPs, autoradiographs were obtained. Results & Conclusion: IGF-I levels were increased significantly in hyperthyroid patients(mean ±SE, 267.88±9.80 ng/ml, p<0.05) and decreased significantly in hypothyroid patients(154.81±1.43 ng/ml, p<0.01) compaired to healthy control group(209.45±.60 ng/ml). Autoradiograph of serum IGFBPs from patients with hyperthyroidism and hypothyroidism did not show any change in the intensity of IGFBP-3 bands(40-45 KD) and IGFBP-1 bands, but in hyperthyroid patients, it showed increased intensity of IGFBP-2 band compared to healthy control group and hypothyroid patients.

MeSH Terms

Equidae
Healthy Volunteers
Humans
Hyperthyroidism*
Hypothyroidism*
Insulin-Like Growth Factor Binding Protein 1
Insulin-Like Growth Factor Binding Protein 2
Insulin-Like Growth Factor Binding Protein 3
Insulin-Like Growth Factor Binding Proteins*
Insulin-Like Growth Factor I
Radioimmunoassay
Thyroid Hormones
Insulin-Like Growth Factor Binding Protein 1
Insulin-Like Growth Factor Binding Protein 2
Insulin-Like Growth Factor Binding Protein 3
Insulin-Like Growth Factor Binding Proteins
Insulin-Like Growth Factor I
Thyroid Hormones