Target intelligence / Profile preview

Retinol dehydrogenase 12 (RDH12)

Target
RDH12
Molecular classification
Enzyme, Oxidoreductase, Short-chain dehydrogenase/reductase (SDR) family
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Overview

Retinol dehydrogenase 12 (RDH12) is a member of the short-chain dehydrogenase/reductase family primarily expressed in the inner segments of retinal photoreceptors. The enzyme catalyzes the NADPH-dependent reduction of all-trans- and 11-cis-retinal to their respective retinols, playing a key role in the visual cycle and protecting photoreceptor cells from toxic aldehydes—byproducts of light exposure and lipid peroxidation. Mutations in RDH12 are associated with severe inherited retinal dystrophies, such as Leber congenital amaurosis. In addition to the retina, RDH12 is expressed at lower levels in other tissues, including kidney, liver, pancreas, and brain, suggesting broader aldehyde detoxification functions.

Other names
RDH12Short chain dehydrogenase/reductase family 7C member 2 (SDR7C2)all-trans and 9-cis retinol dehydrogenase
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Mechanism of action

Enzyme inhibition (e.g., competitive inhibition of oxidoreductase activity by retinoic acid derivatives)

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Biological functions

Visual cycleRetinoid metabolismDetoxification of aldehydesCellular protection from oxidative and endoplasmic reticulum stress
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Disease associations

Retinal diseases (e.g., Leber congenital amaurosis, retinitis pigmentosa)Neurodegenerative disease (retinal degeneration)Other (photoreceptor protection, cellular stress response)
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Safety considerations

Potential risk of vision loss due to deficiency or mutationaccumulation of toxic retinal byproducts resulting in photoreceptor degeneration
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Interacting drugs

Isotretinoin (13-cis-retinoic acid, competitive inhibitor of some retinol dehydrogenases)

1 more in the full profile.

07

Biomarkers

RDH12 mutations as biomarkers for inherited retinal dystrophies and response to emerging gene therapies

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