Peritubular capillaries of the renal cortex in experimental diabetes mellitus in the rat.

1. Microangiopathy affects the peritubular capillaries in experimental diabetes. Five to six months after streptozotocin administration to induce experimental diabetes in rats, a progressive increase of lymph flow and of the entry of albumin from the renal peritubular capillaries into the interstitium was seen. 2. Under these conditions, owing to the alteration of peritubular physical forces, the uptake of tubular reabsorbate into the capillaries can be impaired with potentially severe consequences in diabetic nephropathy.