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Diabetologia

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01.12.2009 | Review

Insights into the critical role of NADPH oxidase(s) in the normal and dysregulated pancreatic beta cell

verfasst von: P. Newsholme, D. Morgan, E. Rebelato, H. C. Oliveira-Emilio, J. Procopio, R. Curi, A. Carpinelli

Erschienen in: Diabetologia | Ausgabe 12/2009

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Abstract

It is now widely accepted that reactive oxygen species (ROS) contribute to cell and tissue dysfunction and damage in diabetes. The source of ROS in the insulin secreting pancreatic beta cells has traditionally been considered to be the mitochondrial electron transport chain. While this source is undoubtedly important, we fully describe in this article recent information and evidence of NADPH oxidase-dependent generation of ROS in pancreatic beta cells and identify the various isoforms that contribute to O ₂ ^•− and H₂O₂ production in various conditions. While glucose-stimulated ROS generation may be important for acute regulation of insulin secretion, at higher levels ROS may disrupt mitochondrial energy metabolism. However, ROS may alter other cellular processes such as signal transduction, ion fluxes and/or cell proliferation/death. The various beta cell isoforms of NADPH oxidase (described in this review) may, via differences in the kinetics and species of ROS generated, positively and negatively regulate insulin secretion and cell survival.

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Titel: Insights into the critical role of NADPH oxidase(s) in the normal and dysregulated pancreatic beta cell
verfasst von: P. Newsholme
D. Morgan
E. Rebelato
H. C. Oliveira-Emilio
J. Procopio
R. Curi
A. Carpinelli
Publikationsdatum: 01.12.2009
Verlag: Springer-Verlag
Erschienen in: Diabetologia / Ausgabe 12/2009
Print ISSN: 0012-186X
Elektronische ISSN: 1432-0428
DOI: https://doi.org/10.1007/s00125-009-1536-z

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