The authenticity and reliability of the cytotoxicity-associated genes was then verified by specifically examining the expression levels of ten congenital heart disease-associated genes, including EPOR, As presented in Fig. 3, RELB, FIGF, SPI-1, TGF-β1, CXCL16 and CRLF2 through qPCR analysis. Here, CRLF2 is linked to congenital heart disease.