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MS
rate-limiting unreviewed

Aldose reductase (AKR1B1)

2 reactions · 2 pathways

Clinical / pharmacological. Target of aldose reductase inhibitors; polyol accumulation in diabetes

What it does, reaction by reaction

2 reactions

Galactose Metabolism Carbohydrate Metabolism · Cytosol

step 7 Irreversible/directional

Galactose + NADPH + H+ → galactitol + NADP+

Converts Galactose NADPH H+ into Galactitol NADP+

› Notes

Aldose reductase reduces excess galactose to galactitol using NADPH. This is a side pathway rather than a normal energy-yielding Leloir step; galactitol is poorly metabolized and can accumulate, particularly in the lens.

Sorbitol / Polyol Pathway Carbohydrate Metabolism · Cytosol

step 1 Irreversible/directional rate-limiting

Glucose + NADPH + H+ -> sorbitol + NADP+

Converts Glucose NADPH H+ into Sorbitol NADP+

› Notes

Rate-limiting. High Km for glucose, so flux rises sharply in hyperglycaemia. Also reduces galactose to galactitol.

Showing all 2 reactions.

What accelerates and inhibits it

Regulation is pathway-specific, so each context is listed separately

0 entries

No regulation recorded for this enzyme in the source documents.

Recent literature

Europe PMC · fetched just now · sorted by publication date

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    Heterogeneous nuclear ribonucleoprotein A1 as a candidate associated with pulmonary vascular remodeling in pulmonary arterial hypertension.

    Morimoto Y, Sato Y, Kato K, Yamamoto H, Suzuki K, Go K, Fukasawa Y, Ohashi N, Takahashi Y, Kato T. · 2026-08-31

    open access unreviewed
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    Retinal proteomics in neurodegeneration: Insights into ocular and brain disorders.

    Mirshahvaladi S, Gaire BP, Kashani SA, Guha A, Koronyo Y, Fuchs DT, You Y, Black KL, Paulo JA, Graham SL, Gup… · 2025-10-30

    open access unreviewed
  8. 8
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    Dietary Fructose and Early-Onset Colorectal Cancer: Metabolic, Microbial, and Translational Perspectives.

    Tangyingyong S, Abu-Fares H, Susiriwatananont T. · 2026-09-14

    open access unreviewed
  10. 10
    Special Issue "Molecular Biomarkers in Cancers: Advances and Challenges".

    Tappia PS, Ramjiawan B. · 2026-09-16

    open access unreviewed

External claims. These come from an index outside this database and are not checked against it. Treat them as leads.