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Date publication

novembre 2017

Journal

Journal of visualized experiments : JoVE

Auteurs

Membres identifiés du Cancéropôle Est :
Dr DAVIDSON Irwin , Dr METZGER Daniel


Tous les auteurs :
Joshi S, Ueberschlag-Pitiot V, Metzger D, Davidson I

Résumé

We describe an efficient and reproducible protocol for the preparation of chromatin from adult mouse skeletal muscle, a physically resistant tissue with a high content of structural proteins. Dissected limb muscles from adult mice are physically disrupted by mechanical homogenisation, or a combination of mincing and douncing, in a hypotonic buffer before formaldehyde fixation of the cell lysate. The fixed nuclei are purified by further cycles of mechanical homogenisation or douncing and sequential filtrations to remove cell debris. The purified nuclei can be sonicated immediately or at a later stage after freezing. The chromatin can be efficiently sonicated and is suitable for chromatin immunoprecipitation experiments, as illustrated by the profiles obtained for transcription factors, RNA polymerase II, and covalent histone modifications. The binding events detected using chromatin prepared by this protocol are predominantly those taking place in the muscle fiber nuclei despite the presence of chromatin from other fiber-associated satellite and endothelial cells. This protocol is therefore adapted to study gene regulation in the adult mouse skeletal muscle.

Mots clés

Animals, Chromatin Immunoprecipitation, methods, Mice, Muscle, Skeletal, metabolism

Référence

J Vis Exp. 2017 11 6;(129):