PMID: 2491037Jan 1, 1989Paper

Determination of insulin in saliva and its correlation with plasma insulin. Assessment of the possible participation++ of the salivary glands in the production of the hormone

Anales de medicina interna : organo oficial de la Sociedad Española de Medicina Interna
P Sánchez GarcíaJ J Cruz Hernández

Abstract

The finding of immunoreactive insulin (IRI) in saliva and an insulin-like protein, similar to pancreatic insulin and with the same biological activities, suggest that both products are pancreatic insulin stored and/or eliminated in the salival manner or an extrapancreatic hormone synthesis, bearing in mind the features which both glands share. The aim of this study is to ascertain whether the amount of insulin from saliva depends on plasmatic insulin and, if so, whether this is a form of elimination. Our results pointed out that the amount of insulin in saliva is similar to the plasmatic insulin in those patients with normal pancreatic function. The oral glucose tolerance test was carried out on 20 patients. The maximum insulin level was produced at the same time as maximum serum glucose level, taking place 60 minutes later. These data, support the concept that salival insulin is a product of the elimination more than synthesis by salival glands, however we can not exclude the possibility of synthesis by the salival gland without direct studies, the ideal test being the immunocytochemist.

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