Ontogeny of insulin-receptor interaction: correlation with circulatory insulin levels.
J Biosci
;
1983 Jun; 5(2): 125-129
Artículo
en Inglés
| IMSEAR
| ID: sea-160220
ABSTRACT
Interaction of [125I]-insulin with intact hepatocytes and its correlation with circulatory insulin level was examined. The hepatocytes from new-born rats bound lowest amount of [125I]-insulin (1.39±0.41 pM/mg cell protein) when circulatory insulin level was high (8±1.5 μU/ml). Hepatocytes from 7 day and 21 day old animals demonstrated a more or less similar relationship, Cells from 31 day old animals exhibited maximum insulin binding, activity (5.13±0.18.pM/mg cell protein) against a low serum insulin level (4.25±0.25 μU/ ml). Scatchard analysis of insulin binding shows that the affinity is higher in the hepatocytes from new-born animals than in the hepatocytes of 31 day old animals. Higher binding observed in the latter case may be due to a greater number of binding sites. Hepatocytes from one year old rats bound very little insulin (2.50±0.36 pM/mg cell protein) against a high circulatory insulin level (9.25±0.85 μU/ml). In view of these results, it appears that the down-regulation hypothesis holds true during ontogeny too.
Texto completo:
Disponible
Índice:
IMSEAR (Asia Sudoriental)
Idioma:
Inglés
Revista:
J Biosci
Año:
1983
Tipo del documento:
Artículo
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