PuSH - Publication Server of Helmholtz Zentrum München

Yi, C.-X. ; Tschöp, M.H. ; Woods, S.C.* ; Hofmann, S.M.

High-fat-diet exposure induces IgG accumulation in hypothalamic microglia.

Dis. Model. Mech. 5, 686-690 (2012)
Publ. Version/Full Text Volltext DOI PMC
Open Access Gold
Creative Commons Lizenzvertrag
The mediobasal hypothalamic arcuate nucleus (ARC), with its relatively 'leaky' blood-brain barrier that allows more circulating molecules to enter the brain, has emerged as a key sensor of blood-borne signals. In both the ARC and white adipose tissue (WAT), consumption of a high-fat diet (HFD) rapidly induces infiltration of microglia (ARC) or macrophages (WAT). Animals with HFD-induced obesity (DIO) and insulin resistance additionally accumulate B cells in WAT, increasing the local production of pathogenic antibodies. We therefore investigated whether DIO mice or genetically obese ob/ob mice have increased IgG in the ARC, analogous to the recent observations in WAT. Following 16 weeks of exposure to a HFD, wild-type (WT) mice had significantly increased IgG-immunoreactivity (ir) signaling that was specific to the ARC and was exclusively concentrated in microglia. By contrast, IgG-ir of age-matched obese ob/ob mice fed standard chow had ARC IgG levels comparable with those in chow-fed WT control mice. However, following 2 weeks of HFD exposure, ob/ob mice also had a significant increase of IgG-ir in the ARC. In summary, our findings reveal a novel pathophysiological phenomenon, specific for the hypothalamic ARC, that is induced by exposure to a HFD and can be enhanced, but not caused, by genetic obesity.
Altmetric
Additional Metrics?
[➜Log in]
Edit extra informations Login
Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords CENTRAL-NERVOUS-SYSTEM; INSULIN-RESISTANCE; GLUCOSE-PRODUCTION; ANTIBODIES; OBESITY; DISEASE; INFLAMMATION; CELLS
ISSN (print) / ISBN 1754-8403
e-ISSN 1754-8411
Journal Disease Models and Mechanisms
Quellenangaben Volume: 5, Issue: 5, Pages: 686-690 Article Number: , Supplement: ,
Publisher Company of Biologists
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Experimental Genetics (IEG)
Institute of Diabetes and Obesity (IDO)