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  • Title: Growth hormone receptor structure in adipocytes from normal and growth hormone-deficient rats.
    Author: Schwartz J, Carter-Su C.
    Journal: Horm Metab Res; 1987 Jun; 19(6):242-8. PubMed ID: 3623413.
    Abstract:
    Using cross-linking techniques, we compared the properties of the growth hormone (GH) receptor in freshly isolated adipocytes from normal rats, from GH deficient rats, and in preincubated adipocytes from normal rats. Bound [125I]iodo-hGH was cross-linked to adipocytes with disuccinimidyl suberate, and membrane proteins labelled with [125I]iodo-hGH were visualized using sodium dodecyl sulfate polyacrylamide gel electrophoresis and autoradiography. All of the adipocytes tested exhibited a prominent Mr = 134,000 band and additional less intense bands in the presence of reductant. No significant differences in the overall banding pattern of membrane proteins were evident in reducing or nonreducing gels, using adipocytes from rats made GH deficient by hypophysectomy or by treatment with antibodies against rat GH, or in fresh and preincubated cells from normal rats. Taken together with binding studies, these findings suggest that differences in the ability of GH to stimulate glucose oxidation in rat adipose tissue probably involve differences distal to the GH receptor.
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