Interuniversity Institute of Myology (2026) “07 | Role of GDF5 on macrophage polarization in the maintenance of muscle mass and function and during aging: Maxime Gelin1, E. Hemery1, F. Truffault1, G. Juban2, C. Perrotta3, F. Pietri-Rouxel1, M. Traoré1, S. Falcone1 | 1Centre de Recherche en Myologie – U974 INSERM, Sorbonne Université, Institut de Myologie, Paris, France; 2Institut NeuroMyoGène, Physiopathologie et Génétique du Neurone et du Muscle Université Claude Bernard Lyon 1, CNRS U5261, Inserm U1315, University Lyon, Lyon, France; 3Department of Biomedical and Clinical Sciences Università degli Studi di Milano, Milan, Italy. | M. Traoré and S. Falcone contributed equally to this work and corresponding authors. s.falcone@institut-myologie.org; m.traore@institut-myologie.org”., European Journal of Translational Myology, 36(s2). doi:10.4081/ejtm.2026.15455.