Modulation of rat brain insulin receptor kinase activity in diabetes.
1992
Abstract Insulin receptors from rat brain regions were studied for insulin binding and receptor associated kinase activity, in alloxan induced short-term and long-term diabetes, and insulin induced hypoglycemia. Insulin receptor activity was assessed by [ 123 I]insulin binding, and basal as well as insulin stimulated kinase activity of the receptor, expressed as phosphorylation of the synthetic peptide poly (Glu-Tyr (4:1)). Regional distribution pattern elicited the highest binding and kinase activity in the olfactory bulb. Diabetes caused a significant increase in the kinase activity. The data suggests that brain insulin receptor kinase is regulated differently compared to peripheral tissues and supports the concept of an active brain insulin receptor in vivo .
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