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  • Adipocyte-secreted chemerin...
    Dranse, Helen J.; Muruganandan, Shanmugam; Fawcett, James P.; Sinal, Christopher J.

    Molecular and cellular endocrinology, 11/2016, Letnik: 436
    Journal Article

    Obesity is associated with white adipose tissue (WAT) remodelling characterized by changes in cellular composition, size, and adipokine secretion. Levels of the adipokine chemerin are positively associated with obesity; however, the biological function of chemerin in WAT is poorly understood. We identified factors involved in WAT remodelling, including matrix metalloproteinase (Mmp)3 and chemokines (Ccl2, 3, 5, 7), as novel targets of chemerin signalling in mature adipocytes. Inhibition of chemerin signalling increased MMP activity and the recruitment of macrophages towards adipocyte-conditioned media. These effects were mediated through increases in NFkB signalling, suggesting that chemerin exerts an anti-inflammatory influence. We also demonstrate that multiple chemerin isoforms are present in adipocyte-conditioned media and that adipocyte-secreted chemerin, but not synthetic chemerin, recapitulates the activity of endogenous chemerin. Considered altogether, this suggests that endogenously secreted chemerin plays an autocrine/paracrine role in WAT, identifying chemerin as a therapeutic target to modulate adipose remodelling. •Mature adipocytes express high levels of chemerin and its receptor CMKLR1.•Inhibition of chemerin in mature adipocytes increases MMP3 and chemokine activity.•Effects are mediated through NFkB suggesting chemerin plays anti-inflammatory role.•Adipocyte-secreted chemerin is uniquely-processed.