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Type 2 diabetes mellitus as a conformational disease
Melvin R Hayden1, Suresh C Tyagi, Michelle M Kerklo
1Department of Family and Community Medicine, University of Missouri, Columbia, USA.
JOP : Journal of the Pancreas
|July 12, 2005
Summary
Type 2 diabetes is a conformational disease where islet amyloid polypeptide misfolds and aggregates. This protein misfolding, driven by oxidative stress, leads to beta cell dysfunction and disease progression.
Area of Science:
- Biochemistry
- Cell Biology
- Endocrinology
Background:
- Conformational diseases stem from protein misfolding and aggregation.
- Type 2 diabetes mellitus (T2DM) involves the misfolding and aggregation of islet amyloid polypeptide (IAPP) in pancreatic beta cells.
- T2DM is linked to oxidative stress and endoplasmic reticulum stress.
Purpose of the Study:
- To define Type 2 diabetes mellitus as a conformational disease.
- To elucidate the role of protein misfolding and aggregation in T2DM pathogenesis.
- To understand T2DM progression through the lens of conformational changes.
Main Methods:
- Review of existing literature on protein misfolding diseases and T2DM.
- Analysis of the structural changes in IAPP leading to aggregation.
- Examination of the cellular stress responses involved in T2DM.
Main Results:
- IAPP undergoes conformational changes, forming aggregates with a beta-pleated sheet structure.
- Oxidative stress exacerbates protein misfolding and aggregation in beta cells.
- Cellular quality control systems, including the unfolded protein response, are overwhelmed in T2DM.
Conclusions:
- Viewing T2DM as a conformational disease provides a framework for understanding its progression.
- IAPP aggregation is a key pathological event in T2DM.
- Targeting protein misfolding and aggregation may offer therapeutic strategies for T2DM.