CCND1 and acute respiratory distress syndrome: By the 7th day there was an increase in CCND1 mRNA by 3.9 times after 70% PH with ALI, while the mRNA levels of the HNF4 genes were reduced by 1.8 times, and those of CCND1 by 2.8 times by the 3rd day after 70% PH; by the 7th day, for all genes studied, no statistically significant differences were found.