Quantitative assessment of glomerular basement membrane collagen IV α chains in paraffin sections from patients with focal segmental glomerulosclerosis and Alport gene variants.

Focal segmental glomerulosclerosis (FSGS) lesions have been linked to variants in COL4A3/A4/A5 genes, which are also mutated in Alport syndrome. Although it could be useful for diagnosis, quantitative evaluation of glomerular basement membrane (GBM) type IV collagen (colIV) networks is not widely used to assess these patients. To do so, we developed immunofluorescence imaging for collagen α5(IV) and α1/2(IV) on kidney paraffin sections with Airyscan confocal microscopy that clearly distinguishes GBM collagen α 3 α 4 α5(IV) and α 1 α 1 α2(IV) as two distinct layers, allowing quantitative assessment of both colIV networks.

Source: Kidney International - February 22, 2024 Category: Urology & Nephrology Authors: Pongpratch Puapatanakul, Suramath Isaranuwatchai, Ankanee Chanakul, Jerasit Surintrspanont, Kroonpong Iampenkhae, Talerngsak Kanjanabuch, Kanya Suphapeetiporn, Vivek Charu, Hani Y. Suleiman, Kearkiat Praditpornsilpa, Jeffrey H. Miner Tags: technical notes Source Type: research