Erythrocytes from growth hormone-deficient children (GHd-children) (n=10) showed a statistically significant increase in insulin binding at low unlabeled insulin concentrations, together with a threefold decrease in apparent receptor affinity, as compared to control children (C) (n=11). Scatchard analysis of the binding data using the two-site model revealed that both the receptor concentration R1 [GHd-children 0.10±0.01 ng/ml and C 0.03±0.002 ng/ml] and the dissociation constant KD1 [GHd-children (0.48±0.05)×10−9M and C (0.19±0.01)×10−9M] for high affinitylow capacity sites were significantly increased in erythrocytes from GHd-children, while neither receptor concentrations (R2) nor the dissociation constant (KD2) for low affinity-high capacity sites proved to be altered. These events were accompanied by a normal sensitivity to insulin as well as glucose tolerance in the GHd-group. The meaning of the increased insulin binding with normal insulin sensitivity in GH-deficiency is discussed.
Research Article| August 01 1991
Increased insulin receptor binding in erythrocytes from growth hormone-deficient children
M. C. Carranza;
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N. Dávila, B. Barceló, M. C. Carranza, C. Calle; Increased insulin receptor binding in erythrocytes from growth hormone-deficient children. Biosci Rep 1 August 1991; 11 (4): 195–201. doi: https://doi.org/10.1007/BF01136853
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