The role of “leakage” of tubular fluid in anuria produced by mercury poisoning was studied in rats by micropuncture techniques. After an initial brisk diuresis, almost all animals were completely anuric 24 hours after HgCl2 injection. Lissamine green injected intravenously in the early stage of anuria appeared in the beginning of the proximal tubule, but the color became progressively lighter as the dye traversed the proximal convolutions. The dye was barely visible in the terminal segments of the proximal tubule; it did not appear at all in the distal tubules. These observations suggest that the proximal epithelium had become abnormally permeable to Lissamine green.
Norman Bank, Bertrand F. Mutz, Hagop S. Aynedjian
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