ACTA1 and hydrops fetalis: The results of western blotting and qRT-PCR showed that after blocking the expression of ASIC1a with the specific inhibitor PcTx-1 or downregulating the expression of ASIC1a with specific ASIC1a-siRNA, the expression of ASIC1a and HF markers, collagen-1, α-SMA, CaM, and CaMKII, decreased.