ArticleInvestigative ophthalmology & visual science2025
Effect of Dync1h1 on Phototransduction Protein Transport and the Development and Maintenance of Photoreceptor Cells in Zebrafish.
Article in Investigative ophthalmology & visual science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- The roles of cytoplasmic dynein complex in various ocular disorders.Molecular medicine (Cambridge, Mass.) · 2026Review
- Glucagon secretion by pancreatic alpha-cells requires an intact tubulin-cytoskeleton-primary cilium axis.Molecular medicine (Cambridge, Mass.) · 2026Article
- Loss of BAP31 Is Detrimentally Aging Photoreceptors Through ER Stress-Mediated Retinal Degeneration.Cells · 2025Article
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6 authors.
Funding
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Abstract
Purpose: Retinitis pigmentosa (RP) is a hereditary retinal disease characterized by progressive degeneration of photoreceptor cells (PRCs). Identifying potential pathogenic genes and understanding the mechanisms of PRC degeneration are essential for improving diagnosis and treatment. Cytoplasmic dynein 1, responsible for retrograde axonal transport along microtubules, plays critical roles in neuronal function. This study utilized dync1h1-deficient zebrafish to investigate its roles in PRC morphogenesis and degeneration. Methods: Heterozygous and homozygous dync1h1-deficient zebrafish were confirmed through Sanger sequencing. Morphological changes and retinal phenotypes were assessed through histological analysis. RNA sequencing and bioinformatics were used to explore molecular mechanisms in dync1h1-/- zebrafish, with endoplasmic reticulum (ER) stress and apoptosis pathways validated in vivo. Results: Dync1h1-/- zebrafish exhibit severe developmental defects, including microphthalmia, disorganized retinal lamination, and PRC apoptosis. In dync1h1+/-, mild but progressive growth retardation and PRC defects were observed. Dync1h1 loss impaired retrograde axonal transport, leading to defects in cilium biogenesis and transport disorder of phototransduction proteins in PRCs. This triggered ER stress, activating BiP-ATF4-CHOP signaling pathway and leading to PRC degeneration. Conclusions: Dync1h1 is essential for maintaining retrograde axonal transport and proper trafficking of phototransduction proteins in PRCs. Non-resolving ER stress-induced PRC apoptosis is a key factor in DYNC1H1-associated retinal degeneration. This study provides important insights into the precise diagnosis and may help in the development of targeted therapies for retinal degenerative diseases.
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