Bisretinoids of the Retina: Photo-Oxidation, Iron-Catalyzed Oxidation, and Disease Consequences
Open accessAbstract
The retina and, in particular, retinal pigment epithelial cells are unusual for being encumbered by exposure to visible light, while being oxygen-rich, and also amassing photoreactive molecules. These fluorophores (bisretinoids) are generated as a byproduct of the activity of vitamin A aldehyde—the chromophore necessary for vision. Bisretinoids form in photoreceptor cells due to random reactions of two molecules of vitamin A aldehyde with phosphatidylethanolamine; bisretinoids are subsequently transferred to retinal pigment epithelial (RPE) cells, where they accumulate in the lysosomal compartment with age. Bisretinoids can generate reactive oxygen species by both energy and electron transfer, and they become photo-oxidized and photolyzed in the process. While these fluorescent molecules are accrued by RPE cells of all healthy eyes, they are also implicated in retinal disease.
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In the membranes of outer photoreceptor segments, nonenzymatically formed toxic bisretinoids are converted upon phagocytosis in the acidic environment of RPE phagolysosomes to bisretinoid pyridinium compound A2E and related bisretinoids.
“In the membranes of outer photoreceptor segments are nonenzymatically formed toxic bisretinoids. Upon phagocytosis, these bisretinoids are in the acidic environment of RPE phagolysosomes converted to bisretinoid pyridinium compound A2E and related bisretinoids [54,69,70,71,72,73,74].”
From The Role of Vitamin A in Retinal Diseases (2022) · cites this paper as [72]
Section 2 states that bisretinoids form nonenzymatically in photoreceptor outer segments and identifies A2PE as the immediate precursor of A2E. The Conclusions say the compounds reach the RPE in phagocytosed outer-segment membrane. The paper does not say that the bisretinoids generally are converted to A2E and related compounds in the acidic environment of RPE phagolysosomes. (LLM, conf=0.85)
Experimental — accuracy not yet measuredAlthough abundant lipofuscin accumulation is involved in the aetiology of certain retinal diseases such as AMD, Best disease and ABCA4-retinopathy, it also accumulates at a lower level with age in the RPE of healthy eyes.
“Although abundant lipofuscin accumulation is involved in the aetiology of certain retinal diseases (e.g., AMD, Best disease and ABCA4-retinopathy), it accumulates at a lower level also with age in the RPE of healthy eyes [9,72,73,74,75].”
From The Role of Vitamin A in Retinal Diseases (2022) · cites this paper as [72]
Section 2 says bisretinoid fluorophores accumulate throughout life and are measurable in the RPE. Section 8 reports elevated lipofuscin-related signals in ABCA4-associated Stargardt disease and within Best disease lesions, but describes the Best disease increase as likely secondary rather than established as a cause. It also reports lipofuscin-related signals in studied AMD groups as similar to or lower than those in age-matched healthy eyes, not abundantly elevated. Page numbers were not available in our copy. (LLM, conf=0.88)
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THE PHOTOCHEMISTRY OF HUMAN RETINAL LIPOFUSCIN AS STUDIED BY EPR
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Quantifying Fundus Autofluorescence in Patients With Retinitis Pigmentosa
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Self-citationIron promotes oxidative cell death caused by bisretinoids of retina
Ueda, K., Kim, H. J., Zhao, J., Song, Y., Dunaief, J. L., & Sparrow, J. R. (2018) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1722601115 · Cited by 65 · see citing works
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Environmental Effects on the Photochemistry of A2-E, a Component of Human Retinal Lipofuscin¶
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A TEST OF THE SINGLET OXYGEN MECHANISM OF CATIONIC DYE PHOTOSENSITIZATION OF MITOCHONDRIAL DAMAGE
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Singlet-oxygen Generation from A2E¶
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A Novel Bisretinoid of Retina Is an Adduct on Glycerophosphoethanolamine
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Mechanisms involved in A2E oxidation
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Self-citationJang, Y. P., Zhou, J., Nakanishi, K., & Sparrow, J. R. (2005) · Photochemistry and Photobiology · doi:10.1111/j.1751-1097.2005.tb00221.x · Cited by 46 · see citing works
Self-citationA mechanistic study of the photooxidation of A2E, a component of human retinal lipofuscin
Gaillard, E. R., Avalle, L. B., Keller, L. M. M., Wang, Z., Reszka, K., & Dillon, J. P. (2004) · Experimental Eye Research · doi:10.1016/j.exer.2004.05.005 · Cited by 45 · see citing works
Sunlight Exposure, Pigmentation, and Incident Age-Related Macular Degeneration
Klein, R., Howard, K. P., Iyengar, S. K., Sivakumaran, T. A., Meyers, K. J., Cruickshanks, K. J., & Klein, R. (2014) · Investigative Ophthalmology & Visual Science · doi:10.1167/iovs.14-14602 · Cited by 43 · see citing works
Primary Photophysical Properties of A2E in Solution
Lamb, L. E., Ye, T., Haralampus-Grynaviski, N. M., Williams, T., Pawlak, A. M., Sarna, T., & Simon, J. D. (2001) · The Journal of Physical Chemistry B · doi:10.1021/jp0123177 · Cited by 41 · see citing works
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Action spectra for the photoconsumption of oxygen by human ocular lipofuscin and lipofuscin extracts
Pawlak, A. M., Rôżanowska, M., Zaręba, M., Lamb, L. E., Simon, J. D., & Sarna, T. (2002) · Archives of Biochemistry and Biophysics · doi:10.1016/s0003-9861(02)00260-6 · Cited by 41 · see citing works
Wiktor, A., Sarna, M., Wnuk, D., & Sarna, T. (2018) · Scientific Reports · doi:10.1038/s41598-018-36322-2 · Cited by 40 · see citing works
Photooxidation of RPE lipofuscin bisretinoids enhances fluorescence intensity
Kim, S. R., Jang, Y. P., & Sparrow, J. R. (2009) · Vision Research · doi:10.1016/j.visres.2009.09.015 · Cited by 37 · see citing works
Self-citationZhou, J., Ueda, K., Zhao, J., & Sparrow, J. R. (2015) · Journal of Biological Chemistry · doi:10.1074/jbc.m115.680363 · Cited by 34 · see citing works
Self-citationZhou, J., Gao, X., Cai, B., & Sparrow, J. R. (2006) · Rejuvenation Research · doi:10.1089/rej.2006.9.256 · Cited by 33 · see citing works
Self-citationCantrell, A., McGarvey, D. J., Roberts, J. E., Sarna, T., & Truscott, T. G. (2001) · Journal of Photochemistry and Photobiology B Biology · doi:10.1016/s1011-1344(01)00224-x · Cited by 33 · see citing works
Ferroxidase Hephaestin's Cell-Autonomous Role in the Retinal Pigment Epithelium
Wolkow, N., Song, D., Song, Y., Chu, S., Hadziahmetovic, M., Lee, J. C., Iacovelli, J., Grieco, S. F., & Dunaief, J. L. (2012) · American Journal Of Pathology · doi:10.1016/j.ajpath.2011.12.041 · Cited by 33 · see citing works
The lipid peroxidation theory of lipofuscinogenesis cannot yet be confirmed
Eldred, G. E., & Katz, M. L. (1991) · Free Radical Biology and Medicine · doi:10.1016/0891-5849(91)90054-7 · Cited by 32 · see citing works
Kim, H. J., & Sparrow, J. R. (2018) · Journal of Lipid Research · doi:10.1194/jlr.m084459 · Cited by 31 · see citing works
Self-citationBaumann, B. H., Shu, W., Song, Y., Sterling, J. K., Kozmík, Z., Lakhal‐Littleton, S., & Dunaief, J. L. (2019) · American Journal Of Pathology · doi:10.1016/j.ajpath.2019.05.022 · Cited by 31 · see citing works
Zhang, Q., Presswalla, F., Calton, M. A., Charniga, C. J., Stern, J. H., Temple, S., Vollrath, D., Zacks, D. N., Ali, R. R., Thompson, D. A., et al. (2019) · Investigative Ophthalmology & Visual Science · doi:10.1167/iovs.19-26690 · Cited by 31 · see citing works
Quantitative Autofluorescence Intensities in Acute Zonal Occult Outer Retinopathy vs Healthy Eyes
Boudreault, K., Schuerch, K., Zhao, J., Lee, W., Cabral, T., Yannuzzi, L. A., Tsang, S. H., & Sparrow, J. R. (2017) · JAMA Ophthalmology · doi:10.1001/jamaophthalmol.2017.4499 · Cited by 29 · see citing works
Self-citationToward an Understanding of Bisretinoid Autofluorescence Bleaching and Recovery
Yamamoto, K., Zhou, J., Hunter, J. J., Williams, D. R., & Sparrow, J. R. (2012) · Investigative Ophthalmology & Visual Science · doi:10.1167/iovs.12-9535 · Cited by 25 · see citing works
Self-citationZhao, J., Ueda, K., Riera, M., Kim, H. J., & Sparrow, J. R. (2018) · Journal of Biological Chemistry · doi:10.1074/jbc.ra118.005949 · Cited by 25 · see citing works
Self-citationA vicious cycle of bisretinoid formation and oxidation relevant to recessive Stargardt disease
Zhao, J., Kim, H. J., Ueda, K., Zhang, K., Montenegro, D., Dunaief, J. L., & Sparrow, J. R. (2021) · Journal of Biological Chemistry · doi:10.1016/j.jbc.2021.100259 · Cited by 25 · see citing works
Self-citationPhoto-products of retinal pigment epithelial bisretinoids react with cellular thiols.
Yoon, K. D., Yamamoto, K., Zhou, J., & Sparrow, J. R. (2011) · PubMed Central · Cited by 24 · see citing works
Self-citationPhotoreactivity of Bis-retinoid A2E Complexed with a Model Protein in Selected Model Systems
Furso, J., Żądło, A. C., Szewczyk, G. M., & Sarna, T. (2020) · Cell Biochemistry and Biophysics · doi:10.1007/s12013-020-00942-1 · Cited by 14 · see citing works
Photobleaching and Fluorescence Recovery of RPE Bisretinoids
Liu, Z., Ueda, K., Kim, H. J., & Sparrow, J. R. (2015) · PLoS ONE · doi:10.1371/journal.pone.0138081 · Cited by 12 · see citing works
Self-citationPhoto‐Fenton and Riboflavin‐photosensitized Processes of the Isoxaflutole Herbicide
Gatica, E. A., Possetto, D., Reynoso, A., Natera, J., Miskoski, S., Gerónimo, E. D., Bregliani, M. M., Pajares, A., & Massad, W. A. (2018) · Photochemistry and Photobiology · doi:10.1111/php.13047 · Cited by 10 · see citing works
A mathematical evaluation of dose-dependent PpIX fluorescence kinetics in vivo
Chatelain (2001) · Pure Amsterdam UMC · doi:10.1562/0031-8655(2001)074 · Cited by 6 · see citing works
Klein, R. (2002) · Archives of Ophthalmology · doi:10.1001/archopht.120.11.1551 · Cited by 4 · see citing works
The Antiapoptotic Effect of Low-dose UVB Irradiation in NIH3T3 Cells Involves Caspase Inhibition¶
Ibuki, Y., & Gotô, R. (2003) · Pure Amsterdam UMC · doi:10.1562/0031-8655(2003)077 · Cited by 1 · see citing works
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The Role of Vitamin A in Retinal Diseases
Sajovic, J., Meglič, A., Glavač, D., Markelj, Š., Hawlina, M., & Fakin, A. (2022) · International Journal of Molecular Sciences · doi:10.3390/ijms23031014 · Cited by 109 · see citing works
Rôżanowska, M. (2023) · Antioxidants · doi:10.3390/antiox12122111 · Cited by 59 · see citing works
Lieffrig, S. A., Gyimesi, G., Mao, Y., & Finnemann, S. C. (2023) · Immunological Reviews · doi:10.1111/imr.13264 · Cited by 47 · see citing works
von der Emde, L. A., Vaisband, M., Hasenauer, J., Bourauel, L., Bermond, K., Saßmannshausen, M., Heintzmann, R., Holz, F. G., Curcio, C. A., Sloan, K. R., et al. (2022) · Translational Vision Science & Technology · doi:10.1167/tvst.11.8.19 · Cited by 34 · see citing works
Patil, N. D., Bains, A., Sridhar, K., Sharma, M., Dhull, S. B., Gökşen, G., Chawla, P., & Inbaraj, B. S. (2024) · Food Chemistry · doi:10.1016/j.foodchem.2024.141348 · Cited by 33 · see citing works
Peng, W., Wu, Y., Peng, Z., Qi, W., Liu, T., Yang, B., He, D., Liu, Y., & Wang, Y. (2022) · Food Research International · doi:10.1016/j.foodres.2022.111313 · Cited by 32 · see citing works
Retinal Pigment Epithelium Under Oxidative Stress: Chaperoning Autophagy and Beyond
Markitantova, Y. V., & Simirskii, V. N. (2025) · International Journal of Molecular Sciences · doi:10.3390/ijms26031193 · Cited by 32 · see citing works
Feldman, T. B., Dontsov, A. E., Yakovleva, M. A., & Оstrovsky, М. А. (2022) · Biophysical Reviews · doi:10.1007/s12551-022-00989-9 · Cited by 29 · see citing works
Retinal Pigment Epithelium Pigment Granules: Norms, Age Relations and Pathology
Dontsov, A. E., & Оstrovsky, М. А. (2024) · International Journal of Molecular Sciences · doi:10.3390/ijms25073609 · Cited by 27 · see citing works
Antioxidants and Mechanistic Insights for Managing Dry Age-Related Macular Degeneration
Basyal, D., Lee, S., & Kim, H. J. (2024) · Antioxidants · doi:10.3390/antiox13050568 · Cited by 22 · see citing works
Self-citationAutophagy in drusen biogenesis secondary to age‐related macular degeneration
Hyttinen, J. M. T., Koskela, A. K. J., Błasiak, J., & Kaarniranta, K. (2024) · Acta Ophthalmologica · doi:10.1111/aos.16744 · Cited by 20 · see citing works
Chemiexcitation and melanin in photoreceptor disc turnover and prevention of macular degeneration
Lyu, Y., Tschulakow, A., Wang, K., Brash, D. E., & Schraermeyer, U. (2023) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.2216935120 · Cited by 14 · see citing works
Dontsov, A. E., Yakovleva, M. A., Трофимова, Н. Н., Sakina, N. L., Gulin, A. A., Aybush, A. V., Gostev, F. E., Vasin, A., Feldman, T. B., & Оstrovsky, М. А. (2022) · International Journal of Molecular Sciences · doi:10.3390/ijms23031534 · Cited by 15 · see citing works
Różanowska, M. B., & Różanowski, B. (2022) · International Journal of Molecular Sciences · doi:10.3390/ijms23020922 · Cited by 14 · see citing works
Liu, T., Qi, W., Peng, W., Zhang, J., & Wang, Y. (2023) · Food Science and Human Wellness · doi:10.26599/fshw.2022.9250053 · Cited by 13 · see citing works
Plasma Metabolites Associated with OCT Features of Age-Related Macular Degeneration
Laíns, I., Han, X., Gil, J., Providência, J., Nigalye, A. K., Alvarez, R., Douglas, V. P., Mendez, K. M., Katz, R., Tsougranis, G. H., et al. (2023) · Ophthalmology Science · doi:10.1016/j.xops.2023.100357 · Cited by 11 · see citing works
Dontsov, A. E., Yakovleva, M. A., Vasin, A. A., Gulin, A. A., Aybush, A. V., Nadtochenko, V. A., & Оstrovsky, М. А. (2023) · International Journal of Molecular Sciences · doi:10.3390/ijms241713099 · Cited by 11 · see citing works
Macular Pigment Carotenoids and Bisretinoid A2E
Arunkumar, R., & Bernstein, P. S. (2023) · Advances in experimental medicine and biology · doi:10.1007/978-3-031-27681-1_3 · Cited by 10 · see citing works
Integrative Landscape of Dry AMD Pathogenesis, Models, and Emerging Therapeutic Strategies
Bhandari, S. K., Lee, S., & Kim, H. J. (2025) · International Journal of Molecular Sciences · doi:10.3390/ijms27010202 · Cited by 10 · see citing works
Self-citationSinglet Oxygen Quenching by Resveratrol Derivatives †
Monsour, C. G., Tadle, A. C., Tafolla‐Aguirre, B. J., Lakshmanan, N., Yoon, J. H., Sabio, R. B., & Selke, M. (2022) · Photochemistry and Photobiology · doi:10.1111/php.13704 · Cited by 7 · see citing works
Lyu, Y., Tschulakow, A., & Schraermeyer, U. (2022) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2022.02.16.480523 · Cited by 6 · see citing works
Retinoid Synthesis Regulation by Retinal Cells in Health and Disease
Andreazzoli, M., Longoni, B., Angeloni, D., & Demontis, G. C. (2024) · Cells · doi:10.3390/cells13100871 · Cited by 6 · see citing works
Azevedo-Repossi, R. D. F., Brito, R., Cossenza, M., dos Santos‐Rodrigues, A., Ferreira, G. C., Petrs‐Silva, H., Calaza, K. D. C., & Madeira, L. F. (2025) · Molecular Neurobiology · doi:10.1007/s12035-025-05197-6 · Cited by 5 · see citing works
Oxidative Stress, Neuroinflammation and Neurodegeneration: The Chicken, the Egg and the Dinosaur
Quinn, P. M. J., Ambrósio, A. F., & Alves, C. H. (2022) · Antioxidants · doi:10.3390/antiox11081554 · Cited by 5 · see citing works
Transcriptomic Changes Predict Metabolic Alterations in LC3 Associated Phagocytosis in Aged Mice
Dhingra, A., Tobias, J. W., Philp, N. J., & Boesze‐Battaglia, K. (2023) · International Journal of Molecular Sciences · doi:10.3390/ijms24076716 · Cited by 4 · see citing works
Specialised features of melanosomes in health and disease in the retinal pigment epithelium
Doncheva, D., Eden, E. R., & Futter, C. E. (2025) · Frontiers in Cell and Developmental Biology · doi:10.3389/fcell.2025.1593840 · Cited by 3 · see citing works
Finger, R. P., Jungblut, J., Just, M. D., Terheyden, J. H., Holz, F. G., Liegl, R. G.-H., Ach, T., & Wintergerst, M. W. M. (2025) · Scientific Reports · doi:10.1038/s41598-025-90071-7 · Cited by 2 · see citing works
Arkhipchenko, A. A., Semenov, A. N., Дмитриевич, Ч. Д., Sidorenko, S. V., Bodunova, D. V., Gorokhov, E. S., Yakovleva, M. A., Feldman, T. B., Moysenovich, A. M., Senin, I. I., et al. (2026) · The Journal of Physical Chemistry B · doi:10.1021/acs.jpcb.5c06621 · Cited by 2 · see citing works
Aster-B Modulates Oxidative Stress Responses and Carotenoid Distribution in ARPE-19 Cells
Gopakumar, V., & Lintig, J. V. (2025) · Antioxidants · doi:10.3390/antiox14050575 · Cited by 1 · see citing works
The roles of glycerophospholipids in the aging retina and age-related macular degeneration
Yu, Y., Sun, Y., & Zhao, T. (2025) · Graefe s Archive for Clinical and Experimental Ophthalmology · doi:10.1007/s00417-025-07011-4 · Cited by 1 · see citing works
Inflammasomes in the pathobiology of degenerative retinopathies
Silke, E., Cahill, M. T., Campbell, M., & Doyle, S. (2022) · Elsevier eBooks · doi:10.1016/b978-0-323-91802-2.00021-9
Impact of Oxidized Lipids in the pathogenic mechanism of Age-Related Macular Degeneration
Angayarkanni, N., Babu, K. A., Raman, R., & Biswas, J. (2025) · Elsevier eBooks · doi:10.1016/b978-0-443-19116-9.00046-4
Disease mechanisms revealed in the P23H opsin knock-in mouse model of retinitis pigmentosa
Zhao, J., Montenegro, D., Kim, H. J., Ueda, K., & Sparrow, J. R. (2026) · PNAS Nexus · doi:10.1093/pnasnexus/pgag088
Self-citationBai, Y., Xie, M., Yao, Y., Zhou, B., & Zhu, Y. (2026) · International Immunopharmacology · doi:10.1016/j.intimp.2026.117139
Yakovleva, M. A., Kostyukov, A. A., Aronshtam, N. L., Shilkrot, P. M., Borzenok, S. A., Kuzmin, V. A., Feldman, T. B., Ae, D., & Ostrovsky, M. A. (2026) · Biochemistry (Moscow) · doi:10.1134/s0006297926600985
- Authors
- Kim, H. J., Montenegro, D., Zhao, J., & Sparrow, J. R.
- Affiliations
- Columbia University Irving Medical Center (US)
- Corresponding author
- Sparrow, Janet R.
- Venue
- Antioxidants
- Publisher
- MDPI AG
- Published
- 2021-08-29
- Volume
- 10
- Issue
- 9
- Pages
- 1382
- ISSN
- 2076-3921 (ISSN-L)
- PMC
- PMC8467448
- OpenAlex
- W3197408017
- Cited by
- 35
- References
- 134
- Citations by year
- 2026: 4 · 2025: 8 · 2024: 5 · 2023: 8 · 2022: 10
- FWCI
- 0.98
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Antioxidants (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, other-oa)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Eye Institute (EY028131, EY012951, EY024091, P30EY019007)
- Research to Prevent Blindness (The Department of Ophthalmology Columbia University)
- Topics
- Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
- Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
- Keywords
- bisretinoids, vitamin A aldehyde, retinal pigment epithelium, photoreceptors, photooxidation, iron-catalyzed oxidation, reactive oxygen species, photolysis, lysosomal accumulation, retinal disease, phosphatidylethanolamine, energy transfer, electron transfer
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