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Matriptase-2 deficiency protects from obesity by modulating iron homeostasis.


ABSTRACT: Alterations in iron status have frequently been associated with obesity and other metabolic disorders. The hormone hepcidin stands out as a key regulator in the maintenance of iron homeostasis by controlling the main iron exporter, ferroportin. Here we demonstrate that the deficiency in the hepcidin repressor matriptase-2 (Tmprss6) protects from high-fat diet-induced obesity. Tmprss6 -/- mice show a significant decrease in body fat, improved glucose tolerance and insulin sensitivity, and are protected against hepatic steatosis. Moreover, these mice exhibit a significant increase in fat lipolysis, consistent with their dramatic reduction in adiposity. Rescue experiments that block hepcidin up-regulation and restore iron levels in Tmprss6-/- mice via anti-hemojuvelin (HJV) therapy, revert the obesity-resistant phenotype of Tmprss6-/- mice. Overall, this study describes a role for matritpase-2 and hepcidin in obesity and highlights the relevance of iron regulation in the control of adipose tissue function.

SUBMITTER: Folgueras AR 

PROVIDER: S-EPMC5893555 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

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Matriptase-2 deficiency protects from obesity by modulating iron homeostasis.

Folgueras Alicia R AR   Freitas-Rodríguez Sandra S   Ramsay Andrew J AJ   Garabaya Cecilia C   Rodríguez Francisco F   Velasco Gloria G   López-Otín Carlos C  

Nature communications 20180410 1


Alterations in iron status have frequently been associated with obesity and other metabolic disorders. The hormone hepcidin stands out as a key regulator in the maintenance of iron homeostasis by controlling the main iron exporter, ferroportin. Here we demonstrate that the deficiency in the hepcidin repressor matriptase-2 (Tmprss6) protects from high-fat diet-induced obesity. Tmprss6 <sup>-/-</sup> mice show a significant decrease in body fat, improved glucose tolerance and insulin sensitivity,  ...[more]

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