Protein glycation: effects upon protein recognition by the proximal tubule.

Reabsorption of 125I labeled unmodified and glycated albumin by the proximal tubule was studied using micropuncture technique in wistar rats of different ages. The data show a significant reabsorption of unmodified albumin while the glycated albumin was virtually excluded from reabsorption process. Among different explanations considered, we think molecular charge of the protein seems to be a key factor for the altered recognition of glycated albumin by the proximal tubule.