[en] Living organisms are inherently out-of-equilibrium systems. We employ recent developments in stochastic energetics and rely on a minimal microscopic model to predict the amount of mechanical energy dissipated by such dynamics. Our model includes complex rheological effects and nonequilibrium stochastic forces. By performing active microrheology and tracking micronsized vesicles in the cytoplasm of living oocytes, we provide unprecedented measurements of the spectrum of dissipated energy. We show that our model is fully consistent with the experimental data and we use it to offer predictions for the injection and dissipation energy scales involved in active fluctuations. Copyright (C) EPLA, 2016
Disciplines :
Physique
Auteur, co-auteur :
FODOR, Etienne ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
Ahmed, W. W.; Laboratoire Physico-Chimie Curie, Institut Curie, PSL Research University, CNRS UMR168 75005, Paris, France ; Sorbonne Universités, UPMC Univ Paris 06 - 75005, Paris, France ; Department of Physics, California State University - Fullerton, CA 92831, USA
Almonacid, M.; CIRB, Collège de France, CNRS-UMR7241, INSERM-U1050 - 75231 Paris, Cedex 05, France
Bussonnier, M.; Laboratoire Physico-Chimie Curie, Institut Curie, PSL Research University, CNRS UMR168 75005, Paris, France ; Sorbonne Universités, UPMC Univ Paris 06 - 75005, Paris, France
S., Gov N.; Department of Chemical Physics, Weizmann Institute of Science - 76100 Rehovot, Israel
Verlhac, M.-H.; CIRB, Collège de France, CNRS-UMR7241, INSERM-U1050 - 75231 Paris, Cedex 05, France
Betz, T.; Laboratoire Physico-Chimie Curie, Institut Curie, PSL Research University, CNRS UMR168 75005, Paris, France ; Sorbonne Universités, UPMC Univ Paris 06 - 75005, Paris, France
Visco, P.; Laboratoire Matière et Systèmes Complexes, UMR 7057 CNRS/P7, Université Paris Diderot
van Wijland, F.; Laboratoire Matière et Systèmes Complexes, UMR 7057 CNRS/P7, Université Paris Diderot ; Department of Chemistry, University of California - Berkeley, CA, 94720, USA
Co-auteurs externes :
yes
Langue du document :
Anglais
Titre :
Nonequilibrium dissipation in living oocytes
Date de publication/diffusion :
2016
Titre du périodique :
EPL
ISSN :
0295-5075
Maison d'édition :
EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY, 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE, Inconnu/non spécifié
