Hypoxia-induced increase in IMD expression exceeds that of AM in PMEC. Hypoxia-induced IMD expression exceeded that of AM by ∼3.3-fold, whereas in the lung and all other cell types investigated, HL-1 cardiomyocytes, NIH3T3 fibroblasts, and NS20Y neuroblastoma cells, hypoxia-induced AM mRNA expression surpassed that of IMD.