NOS2 and colitis: The negative influence of the chemical induction of UC in the serious form of colitis was also confirmed by medium positive correlations between the inducible isoform of NOS and the epithelial erosion score (r = 0.643), iNOS and Goblet cell mucin-positive area reduction score (r = 0.627) and iNOS and HAI score (r = 0.561).