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Islet amyloid polypeptide--hen or egg in type 2 diabetes pathogenesis?
C Betsholtz1, L Christmanson, S Gebre-Medhin
1Department of Pathology, University of Uppsala, Sweden.
Acta Oncologica (Stockholm, Sweden)
|January 1, 1993
Summary
Islet amyloid polypeptide (IAPP), found in type-2 diabetes, is produced by pancreatic beta-cells. Research is exploring its hormonal function and role in diabetes pathogenesis.
Area of Science:
- Endocrinology
- Molecular Biology
- Diabetes Research
Background:
- Islet amyloid polypeptide (IAPP), also known as amylin, is a major component of amyloid deposits in pancreatic islets.
- These deposits are characteristic of type-2 diabetes mellitus and insulinomas.
- IAPP is synthesized, co-stored, and co-released with insulin by pancreatic beta-cells.
Purpose of the Study:
- To investigate the physiological function of IAPP.
- To elucidate the potential pathogenic role of IAPP in type-2 diabetes mellitus.
Main Methods:
- Biochemical analysis of amyloid deposits.
- Cellular and molecular biology techniques to study IAPP production and release.
- Comparative analysis with homologous neuropeptides like CGRP.
Main Results:
- IAPP identified as the primary peptide in islet amyloid deposits.
- Confirmed IAPP synthesis and co-secretion with insulin from pancreatic beta-cells.
- Established homology between IAPP and CGRP, suggesting hormonal roles.
Conclusions:
- IAPP's presence in islet amyloid suggests a link to type-2 diabetes pathogenesis.
- Further research is warranted to define IAPP's endocrine, paracrine, or autocrine functions.
- Understanding IAPP's role is crucial for developing new diabetes therapies.