GDNF and inflammatory bowel disease: Furthermore, we observed a significant decrease (p < 0.05) in the passage of 51Cr-EDTA in non-IBD control tissues stimulated with GSNO (Figure 6B), GDNF (Figure 6C), and GSNO/GDNF (Figure 6D) which is in line with our previous findings in biopsies from healthy controls [19].