Sugar coatings on retinal cells may drive or reflect blinding eye diseases
Swan J, Gagneux P
Glycobiology
This is human eye biology with no plants involved, so it won't change anything in your garden, though the sugar-coating chemistry it describes is the same kind of glycan work plant scientists study in cell walls and leaf surfaces.
Cells in the eye wear a coat of sugar-based molecules that helps them develop, communicate and stay healthy. Researchers know surprisingly little about these coats in the retina compared with other parts of the eye. Changes in them show up in diseases like macular degeneration and diabetic retinopathy, and it's still unclear whether the changes cause the damage or follow from it.
Key Findings
Retinal glycosylation is far less studied than glycosylation in the cornea and tear fluid, and current knowledge comes mainly from lectin binding and anti-glycan antibody studies.
The review covers major glycan classes in the retina: glycosphingolipids, N- and O-linked protein glycans, glycosaminoglycans on proteoglycans, O-mannosylated proteoglycans and intracellular O-GlcNAcylation.
Altered glycosylation is linked to immune regulation and to retinitis pigmentosa, age-related macular degeneration and diabetic retinopathy, but whether it causes or results from disease remains unresolved.
chevron_right Technical Summary
Sugar coatings on cells, called glycans, shape how the human retina develops and works, yet scientists have barely studied them there. This review maps what's known and links changes in these coatings to blinding conditions like macular degeneration and diabetic retinopathy.
Abstract Preview
Original paper
Glycosylation of the retina.
Unlike the cornea and tear fluid, glycosylation within the retina remains remarkably underexplored. This review highlights the diverse roles of glycans in retinal development and vision, with a foc...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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