Divalent metal transporter 1 regulates iron-mediated ROS and pancreatic ß cell fate in response to cytokines
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Divalent metal transporter 1 regulates iron-mediated ROS and pancreatic ß cell fate in response to cytokines. / Hansen, Jakob Bondo; Tonnesen, Morten Fog; Madsen, Andreas Nygaard; Hagedorn, Peter; Friberg, Josefine; Grunnet, Lars Groth; Heller, R Scott; Nielsen, Anja Østergren; Størling, Joachim; Baeyens, Luc; Anker-Kitai, Leeat; Qvortrup, Klaus; Bouwens, Luc; Efrat, Shimon; Aalund, Mogens; Andrews, Nancy C; Billestrup, Nils; Karlsen, Allan E; Holst, Birgitte; Pociot, Flemming; Mandrup-Poulsen, Thomas.
I: Cell Metabolism, Bind 16, Nr. 4, 2012, s. 449-61.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › fagfællebedømt
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T1 - Divalent metal transporter 1 regulates iron-mediated ROS and pancreatic ß cell fate in response to cytokines
AU - Hansen, Jakob Bondo
AU - Tonnesen, Morten Fog
AU - Madsen, Andreas Nygaard
AU - Hagedorn, Peter
AU - Friberg, Josefine
AU - Grunnet, Lars Groth
AU - Heller, R Scott
AU - Nielsen, Anja Østergren
AU - Størling, Joachim
AU - Baeyens, Luc
AU - Anker-Kitai, Leeat
AU - Qvortrup, Klaus
AU - Bouwens, Luc
AU - Efrat, Shimon
AU - Aalund, Mogens
AU - Andrews, Nancy C
AU - Billestrup, Nils
AU - Karlsen, Allan E
AU - Holst, Birgitte
AU - Pociot, Flemming
AU - Mandrup-Poulsen, Thomas
N1 - Copyright © 2012 Elsevier Inc. All rights reserved.
PY - 2012
Y1 - 2012
N2 - Reactive oxygen species (ROS) contribute to target-cell damage in inflammatory and iron-overload diseases. Little is known about iron transport regulation during inflammatory attack. Through a combination of in vitro and in vivo studies, we show that the proinflammatory cytokine IL-1ß induces divalent metal transporter 1 (DMT1) expression correlating with increased ß cell iron content and ROS production. Iron chelation and siRNA and genetic knockdown of DMT1 expression reduce cytokine-induced ROS formation and cell death. Glucose-stimulated insulin secretion in the absence of cytokines in Dmt1 knockout islets is defective, highlighting a physiological role of iron and ROS in the regulation of insulin secretion. Dmt1 knockout mice are protected against multiple low-dose streptozotocin and high-fat diet-induced glucose intolerance, models of type 1 and type 2 diabetes, respectively. Thus, ß cells become prone to ROS-mediated inflammatory damage via aberrant cellular iron metabolism, a finding with potential general cellular implications.
AB - Reactive oxygen species (ROS) contribute to target-cell damage in inflammatory and iron-overload diseases. Little is known about iron transport regulation during inflammatory attack. Through a combination of in vitro and in vivo studies, we show that the proinflammatory cytokine IL-1ß induces divalent metal transporter 1 (DMT1) expression correlating with increased ß cell iron content and ROS production. Iron chelation and siRNA and genetic knockdown of DMT1 expression reduce cytokine-induced ROS formation and cell death. Glucose-stimulated insulin secretion in the absence of cytokines in Dmt1 knockout islets is defective, highlighting a physiological role of iron and ROS in the regulation of insulin secretion. Dmt1 knockout mice are protected against multiple low-dose streptozotocin and high-fat diet-induced glucose intolerance, models of type 1 and type 2 diabetes, respectively. Thus, ß cells become prone to ROS-mediated inflammatory damage via aberrant cellular iron metabolism, a finding with potential general cellular implications.
U2 - 10.1016/j.cmet.2012.09.001
DO - 10.1016/j.cmet.2012.09.001
M3 - Journal article
C2 - 23000401
VL - 16
SP - 449
EP - 461
JO - Cell Metabolism
JF - Cell Metabolism
SN - 1550-4131
IS - 4
ER -
ID: 43223237