ADGRE1 and pulmonary arterial hypertension: RT-qPCR results also demonstrated that for both normal and PAH rats, the gene expression of CXCR4 and SDF-1 (Figure 4A,B) in cultured BMCs showed similar trends to that of CD14 (Figure 4C), rather than that of CD10 and ADGRE1 (Figure 4D,E).