ANLN and cutaneous mastocytosis: Cardiac genes involved in CM proliferation and angiogenesis were strongly upregulated in the RV of P1 MI mice, and analysis of eGFP-ANILLIN+ CMs confirmed that the increase in proliferating CMs in the RV free wall was as pronounced as in the injured LV, resulting in a thickened RV heart wall but no CM hypertrophy.