alexa Effects of aging on plasma islet amyloid polypeptide basal level and response to oral glucose load.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Diabetes & Metabolism

Author(s): Mitsukawa T, Takemura J, Nakazato M, Asai J, Kanagawa K,

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Abstract To delineate the effects of aging on basal and glucose-stimulated secretion of islet amyloid polypeptide (IAPP), we compared the basal level of plasma IAPP and its response to an oral glucose load in elderly subjects with those of young subjects. Plasma IAPP level was determined by radioimmunoassay. Basal level of plasma IAPP in 20 elderly subjects (mean age 63 yr) was 5.3 +/- 0.4 pmol/l, which was not significantly different from 5.0 +/- 0.3 pmol/l in 22 young subjects (mean age 26 yr). Plasma glucose levels after an oral glucose load in elderly subjects (n = 8, mean age 67 yr) and young subjects (n = 8, mean age 29 yr) were within normal limits. However, the plasma glucose response in the aged group was significantly higher than that in the young group. The plasma insulin response to a glucose load in elderly subjects was not different from that in young subjects. The plasma IAPP level in the aged group significantly increased from 5.3 +/- 0.5 to 16.4 +/- 2.3 pmol/l 120 min after the oral glucose load. This result was quite similar to that in the young group whose plasma IAPP level increased from 4.9 +/- 0.5 to 14.1 +/- 1.5 pmol/l 120 min after the glucose load. We concluded that the basal level of plasma IAPP and its response to glucose were not affected by aging.
This article was published in Diabetes Res Clin Pract and referenced in Journal of Diabetes & Metabolism

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