Abstract
The adult mammalian heart's potential for regeneration is very inefficient. Importantly, adult mammalian cardiomyocytes (CMs) are characterized as a cell population with very limited mitotic potential. Conversely, the neonatal mouse heart possesses a brief, yet robust, regenerative capacity within the first week of life. Cell type-specific enrichment procedures are essential for characterizing the full spectrum of epigenomic landscapes and gene regulatory networks deployed by mammalian CMs. In this chapter, we describe a protocol useful for purifying CM nuclei from mammalian cardiac tissue. Furthermore, we detail a low-input procedure suitable for the parallel genome-wide profiling of chromatin accessibility, histone modifications, and transcription factor-binding sites. The CM nuclei purified using this process are suitable for multi-omic profiling approaches.
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