Meteorin-like/Meteorin-β (Metrnl/Metrnβ) is a secreted protein produced by skeletal muscle and adipose tissue that exerts metabolic actions that improve glucose metabolism. The role of Metrnβ in cardiac disease is completely unknown. Here, we show that Metrnβ-null mice exhibit asymmetrical cardiac hypertrophy, fibrosis, and enhanced signs of cardiac dysfunction in response to isoproterenol-induced cardiac hypertrophy and aging. Conversely, adeno-associated virus–mediated specific overexpression of Metrnβ in the heart prevents the development of cardiac remodeling. Furthermore, Metrnβ inhibits cardiac hypertrophy development in cardiomyocytes in vitro, indicating a direct effect on cardiac cells. Antibody-mediated blockage of Metrnβ in cardiomyocyte cell cultures indicated an autocrine action of Metrnβ on the heart, in addition to an endocrine action. Moreover, Metrnβ is highly produced in the heart, and analysis of circulating Metrnβ concentrations in a large cohort of patients reveals that it is a new biomarker of heart failure with an independent prognostic value.
Meteorin-like/Meteorin-β protects heart against cardiac dysfunction
Disclosures: A. Bayes-Genis reported personal fees from Abbott, personal fees from Astra Zeneca, personal fees from Novartis, personal fees from Vifor, personal fees from Boehringer-Ingelheim, other from Critical Diagnostics, and personal fees from Roche Diagnostics outside the submitted work. No other disclosures were reported.
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Celia Rupérez, Gemma Ferrer-Curriu, Aina Cervera-Barea, Laura Florit, Mariona Guitart-Mampel, Gloria Garrabou, Mònica Zamora, Fàtima Crispi, Joaquim Fernandez-Solà, Josep Lupón, Antoni Bayes-Genis, Francesc Villarroya, Anna Planavila; Meteorin-like/Meteorin-β protects heart against cardiac dysfunction. J Exp Med 3 May 2021; 218 (5): e20201206. doi: https://doi.org/10.1084/jem.20201206
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