Cited by 49Retinal Development and DisordersRetinoids in leukemia and cellular processesPhotoreceptor and optogenetics research

Interphotoreceptor Retinoid-Binding Protein as the Physiologically Relevant Carrier of 11-cis-Retinol in the Cone Visual Cycle

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Parker, Ryan, Wang, Jin-Shan, Kefalov, Vladimir J., Crouch, Rosalie K.·2011·The Journal of Neuroscience

Abstract

Cones function in constant light and are responsible for mediating daytime human vision. Like rods, cones use the photosensitive molecule 11-cis-retinal to detect light, and in constant illumination, a continuous supply of 11-cis-retinal is needed. A retina visual cycle is thought to provide a privileged supply of 11-cis-retinal to cones by using 11-cis-retinol generated in Müller cells. In the cycle, 11-cis-retinol is transported from Müller cells to cone inner segments, where it is oxidized to 11-cis-retinal. This oxidation step is only performed in cones, thus rendering the cycle cone-specific. Interphotoreceptor retinoid-binding protein (IRBP) is a retinoid-binding protein in the subretinal space that binds 11-cis-retinol endogenously. Cones in Irbp−/−mice are retinoid-deficient under photopic conditions, and it is possible that 11-cis-retinol supplies are disrupted in the absence of IRBP. We tested the hypothesis that IRBP facilitates the delivery of 11-cis-retinol to cones by preserving the isomeric state of 11-cis-retinol in light. With electrophysiology, we show that the cone-like photoreceptors of Nrl−/−mice use the cone visual cycle similarly to wild-type cones. Then, using oxidation assays in isolated Nrl−/−Rpe65−/−retinas, we show that IRBP delivers 11-cis-retinol for oxidation in cones and improves the efficiency of the oxidation reaction. Finally, we show that IRBP protects the isomeric state of 11-cis-retinol in the presence of light. Together, these findings suggest that IRBP plays an important role in the delivery of 11-cis-retinol to cones and can facilitate cone function in the presence of light.

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Crossref · 10.1523/jneurosci.3722-10.2011

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  • In isolated Nrl-/-Rpe65-/- retinas, IRBP supplies 11-cis retinol to cones for oxidation and makes that oxidation more efficient.

    “Using isolated Nrl-/-Rpe65-/-retinas, IRBP was shown to deliver 11-cis retinol for oxidation in cones and to enhance the efficiency of the oxidation reaction (Parker et al., 2011).”

    From New insights into retinoid metabolism and cycling within the retina (2013) · cites this paper as Parker et al., 2011

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Authors
Parker, R., Wang, J.-S., Kefalov, V. J., & Crouch, R. K.
Affiliations
  • Medical University of South Carolina (US)
  • Washington University in St. Louis (US)
Venue
The Journal of Neuroscience
Published
2011-03-23
Volume
31
Issue
12
Pages
4714-4719
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1986629963
Cited by
49
References
38
Citations by year
2026: 1 · 2025: 1 · 2024: 4 · 2023: 2 · 2022: 2 · 2020: 4 · 2018: 2 · 2017: 3 · 2016: 3 · 2015: 7 · 2014: 3 · 2013: 4 · 2012: 7
FWCI
2.59
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Digital Commons@Becker (Washington University School of Medicine) (submittedVersion)
Funders
  • Foundation Fighting Blindness
  • Research to Prevent Blindness (EY002687)
  • Medical University of South Carolina
  • University of South Carolina
  • National Institutes of Health (EY002687)
  • National Eye Institute (EY04939, R24EY014793, P30EY002687, R01EY019312, EY019312, EY002687, R01EY004939)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinoids in leukemia and cellular processes
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Photoreceptor and optogenetics research
Keywords
interphotoreceptor retinoid-binding protein, 11-cis-retinol, 11-cis-retinal, Müller cells, cone photoreceptors, photoisomerization
MeSH terms
Retinoid Isomerohydrolase, Retinol-Binding Proteins, Interstitial, Animals, Carrier Proteins, Chromatography, High Pressure Liquid, Electroretinography, Eye Proteins, Light, Oxidation-Reduction, Retinoids, Retinol-Binding Proteins, Vision, Ocular, Vitamin A, Retinal Cone Photoreceptor Cells, Mice, Knockout, cis-trans-Isomerases, Mice

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