Left cardiac ventricles were collected from neonatal hearts left untreated or transferred with adult T cells 36h after myocardial infarction and kept in RNAlater solution for 24h at 4°C. RNA was purified using the RNAeasy Plus Micro Kit (ID: 74034) RNA libraries were prepared for sequencing using TruSeq Stranded mRNA kit (Illumina) with total RNA as input for mRNA capture with oligo-dT beads