ANGPT1 and acute respiratory distress syndrome: Likewise, the researches concerning their microenvironment regulation demonstrated that the stem/progenitor cell-derived conditioned medium possesses the similar efficacy, suggesting that the secreting factors (IL-10, IL-RN, VEGF, angiopoietin-1) act as the anti-inflammatory and pro-reparative mediators on the gas-blood barrier in ALI [86–89].