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Erschienen in: Diabetologia 4/2011

01.04.2011 | Article

Deficiency of haematopoietic-cell-derived IL-10 does not exacerbate high-fat-diet-induced inflammation or insulin resistance in mice

verfasst von: G. M. Kowalski, H. T. Nicholls, S. Risis, N. K. Watson, P. Kanellakis, C. R. Bruce, A. Bobik, G. I. Lancaster, M. A. Febbraio

Erschienen in: Diabetologia | Ausgabe 4/2011

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Abstract

Aims/hypothesis

Recent work has identified the important roles of M1 pro-inflammatory and M2 anti-inflammatory macrophages in the regulation of insulin sensitivity. Specifically, increased numbers of M2 macrophages and a decrease in M1 macrophages within the adipose tissue are associated with a state of enhanced insulin sensitivity. IL-10 is an anti-inflammatory cytokine and is a critical effector molecule of M2 macrophages.

Methods

In the present study, we examined the contribution of haematopoietic-cell-derived IL-10 to the development of obesity-induced inflammation and insulin resistance. We hypothesised that haematopoietic-cell-restricted deletion of IL-10 would exacerbate obesity-induced inflammation and insulin resistance. Lethally irradiated wild-type recipient mice receiving bone marrow from either wild-type or Il10-knockout mice were placed on either a chow or a high-fat diet for a period of 12 weeks and assessed for alterations in body composition, tissue inflammation and glucose and insulin tolerance.

Results

Contrary to our hypothesis, neither inflammation, as measured by the activation of pro-inflammatory stress kinases and gene expression of several pro-inflammatory cytokines in the adipose tissue and liver, nor diet-induced obesity and insulin resistance were exacerbated by the deletion of haematopoietic-cell-derived IL-10. Interestingly, however, Il10 mRNA expression and IL-10 protein production in liver and/or adipose tissue were markedly elevated in Il10-knockout bone-marrow-transplanted mice relative to wild-type bone marrow-transplanted mice.

Conclusions/interpretation

These data show that deletion of IL-10 from the haematopoietic system does not potentiate high-fat diet-induced inflammation or insulin resistance.
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Metadaten
Titel
Deficiency of haematopoietic-cell-derived IL-10 does not exacerbate high-fat-diet-induced inflammation or insulin resistance in mice
verfasst von
G. M. Kowalski
H. T. Nicholls
S. Risis
N. K. Watson
P. Kanellakis
C. R. Bruce
A. Bobik
G. I. Lancaster
M. A. Febbraio
Publikationsdatum
01.04.2011
Verlag
Springer-Verlag
Erschienen in
Diabetologia / Ausgabe 4/2011
Print ISSN: 0012-186X
Elektronische ISSN: 1432-0428
DOI
https://doi.org/10.1007/s00125-010-2020-5

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