Protocols to generate and isolate mouse myogenic progenitors both in vitro and in vivo

Mouse embryonic stem cells (mESCs) can be directed to acquire cell-lineage-specific genetic programs and phenotypes by stepwise exposure to defined factors, allowing the development of in vitro models for studying disease and tissue generation. In this protocol, we describe the use of cultured mESCs to generate presomitic-like mesoderm cells undergoing further specification towards myogenic progenitors (MPs). Further, we describe here a procedure to obtain, dissect, and fluorescence-activated cell sorting (FACS)-isolate somitic cells from genetically labeled Pax7^+/Cre; Rosa26^YFP/+ embryos. For complete details on the use and execution of this protocol, please refer to Khateb et al.¹.