Figure 2

Tight junction protein abundance in children with normal kidney function, children with chronic kidney disease (CKD5) and on peritoneal dialysis (PD). Abundance of sealing claudins (CLDN1, CLDN3, CLND5), pore-forming claudins (CLDN2, CLDN4, CLDN15) and ZO-1, OCL and TriC in the mesothelial (A) and in the arteriolar area (B). CKD5 patients showed a higher abundance of peritoneal mesothelial claudin-2 and arteriolar claudin-3 than in controls. PD patient samples had highest mesothelial and arteriolar claudin-1 and mesothelial claudin-2 abundance, while mesothelial and arteriolar claudin-3 were lowest. Data are presented as median (IQR). One-way ANOVA with Holm-Sidak multiple comparison post-test or Kruskal–Wallis test with Dunn’s multiple comparison post-test were used, accordingly.