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Rat lens aldehyde reductase.

S Sato1, P F Kador

  • 1National Eye Institute, Bethesda, Maryland 20892.

Investigative Ophthalmology & Visual Science
|July 1, 1989
PubMed
Summary
This summary is machine-generated.

Rat lens aldehyde reductase was purified and found distinct from aldose reductase but similar to kidney aldehyde reductase. Its inhibition profile also resembles kidney aldehyde reductase more closely.

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Area of Science:

  • Biochemistry
  • Enzymology
  • Molecular Biology

Background:

  • Aldehyde reductase (E.C. 1.1.1.2) is an enzyme found in various tissues.
  • Understanding its properties is crucial for distinguishing it from related enzymes like aldose reductase.

Purpose of the Study:

  • To purify aldehyde reductase from rat lens.
  • To compare its properties with rat lens aldose reductase and rat kidney aldehyde reductase.
  • To investigate its inhibition characteristics.

Main Methods:

  • Enzyme purification using ammonium sulfate fractionation, Sephadex G-75 chromatography, affinity chromatography (Amicon Matrex Gel Orange A), and chromatofocusing.
  • Comparative analysis of molecular weight, immunological properties, and substrate specificities.
  • Inhibition assays using aldose reductase inhibitors.

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Main Results:

  • Rat lens aldehyde reductase was purified to apparent homogeneity.
  • The purified enzyme is biochemically distinct from rat lens aldose reductase.
  • It shares similarities in molecular weight, immunological properties, and substrate specificities with rat kidney aldehyde reductase.
  • Its inhibition pattern by aldose reductase inhibitors is more akin to rat kidney aldehyde reductase.

Conclusions:

  • Rat lens aldehyde reductase is a distinct enzyme.
  • It exhibits properties more similar to rat kidney aldehyde reductase than to rat lens aldose reductase.
  • Further research into aldehyde reductase is warranted for potential therapeutic applications.