RT Journal Article T1 Obestatin: canonical and unexpected functions A1 Santos Zas, Icía A1 Gurriarán Rodríguez, Uxía A1 Cid Díaz, Tania A1 Leal López, Saúl A1 Casanueva Freijo, Felipe A1 Pazos Randulfe, Yolanda A1 Pérez Camiña, Jesús K1 Obestatin K1 GPR39 K1 Skeletal muscle K1 Atrophy K1 Wasting muscle AB The functions of appetite-regulating hormones have been studied for decades with the aim of finding a solution to the problem of obesity. Among these molecules, a small peptide called obestatin has emerged as an anorexigenic hormone, with an antagonistic effect to the hunger hormone ghrelin. After years of controversy regarding its function in food intake and the establishment of its receptor, GPR39, obestatin is currently being proposed as a powerful therapeutic candidate for pathologies associated with skeletal muscle. Several studies have demonstrated its key role as a regulatory peptide in myogenesis, thereby increasing regeneration in acute muscle damage. Obestatin promotes vascularization and reduces fibrosis in regenerated tissue, while also increasing muscle strength in muscle atrophy pathologies associated with glucocorticoid treatment and Duchenne muscular dystrophy. This review describes the main mechanisms and signaling pathways regulated by the obestatin peptide in muscle pathology. PB Springer YR 2026 FD 2026-03-05 LK https://hdl.handle.net/10347/46825 UL https://hdl.handle.net/10347/46825 LA eng NO Santos-Zas, I., Gurriaran-Rodriguez, U., Cid-Diaz, T., Leal-López, S., Casanueva, F., Pazos-Randulfe, Y., & P. Camiña, J. (2026) Obestatin: canonical and unexpected functions. Reviews in Endocrine and Metabolic Disorders. https://doi.org/10.1007/s11154-026-10021-0 NO Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This work was supported by grants from Instituto de Salud Carlos III in co-financing with FEDER (ISCIIIFEDER; MINECO, Spain; PI21/01639, PI22/00155 and PI24/01602), La Caixa Foundation (LCF/BQ/PI22/11910038) and Axencia Galega de Innovación (Xunta de Galicia; IN607D-2023/04, IN607D-2024/05). DS Minerva RD 24 abr 2026