TGFB1 and inflammatory bowel disease: Interestingly, no statistically significant correlation was observed between the TGF-β1 plasma levels and the TGF-β1 mRNA levels in the macroscopically changed intestinal tissue in the group of IBD patients (Rs = 0.19; p = 0.07) and in both CD and UC subgroups (for CD, Rs = 0.07; p = 0.71 and for UC, Rs = 0.24; p = 0.08).