FN1 and diabetic kidney disease: A very interesting study that combined experimental data and human biopsy findings was published by Huang et al. The authors analyzed the content of STAT1, TGFβ1, fibronectin and collagen type IV mRNA and protein in human biopsy samples obtained from patients with diabetes and DKD, and control samples from non-diabetic patients who were subjected to surgery for renal cell carcinoma (healthy kidney from non-tumorous areas).