Since miRs 17, 21, and 223 were significantly upregulated in the PA of MCT PAH rats, we performed qPCR for BMPR2 and IGF1R mRNA, as these miRNAs have been associated with downregulation of BMPR2 (miR 17, 21 and 145) and IGF1R (miR-223 and 328). Here, BMPR2 is linked to pulmonary arterial hypertension.