Diabetes, Vol 29, Issue 6 438-449, Copyright © 1980 by American Diabetes Association
Immunohistochemical localization of aldose reductase. I. Enzyme purification and antibody preparation--localization in peripheral nerve, artery, and testis
MA Ludvigson and RL Sorenson
Aldose reductase (AR) was purified from rat and bovine seminal vesicles
using DEAE-cellulose, hydroxylapatite, and Sephadex-gel column
chromatography. The purification resulted in the obtention of an AR pool
and a contaminating pool. Antibodies were raised in rabbits against both
enzymes by subcutaneous injection of the AR pool. The antisera was judged
to be specific for AR by immunoprecipitation of AR activity and by
Ouchterlony double immunodiffusion and immunoelectrophoretic methods.
Antibodies against rat AR were used in the unlabeled antibody-enzyme (PAP)
technique to demonstrate the cellular location of the enzyme in a number of
tissues known to be sites of diabetic lesions. Antibodies against bovine AR
were not cross reactive with the rat enzyme, as determined by Ouchterlony
and competitive protein-binding studies. AR was localized in rat tissues to
the Schwann cell sheath of peripheral nerve, arterial endothelium, and the
sustentacular (Sertoli) cells and mature spermatids of the testis.