ArticleJournal of cell science2025
Inpp5e is crucial for photoreceptor outer segment maintenance.
Article in Journal of cell science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Primary cilia: master conductors of cellular communication in development and disease.Nature reviews. Nephrology · 2026Review
- Loss of INPP5E affects photoreceptor outer segment membrane biogenesis in iPSC-derived human retinal organoids.Journal of cell science · 2026Article
- The EH-binding protein EHBP1 operates in a ciliary functional module affected by INPP5E dysfunction.Journal of cell science · 2026Article
- Super-resolution microscopy reveals a Rab6a-dependent trafficking hub for rhodopsin at the mammalian rod photoreceptor Golgi.Biology open · 2025Article
- Super-resolution microscopy reveals a Rab6a-dependent trafficking hub for rhodopsin at the mammalian rod photoreceptor Golgi.bioRxiv : the preprint server for biology · 2025Article
- Ciliary ARL13B Is Essential for Vision and Morphogenesis of Cone Outer Segments.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025Article
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7 authors.
Funding
Abstract
In humans, inositol polyphosphate-5-phosphatase E (INPP5E) mutations cause retinal degeneration as part of Joubert and MORM syndromes and can also cause non-syndromic blindness. In mice, mutations cause a spectrum of brain, kidney and other anomalies and prevent the formation of photoreceptor outer segments. To further explore the function of Inpp5e in photoreceptors, we generated conditional and inducible knockouts of mouse Inpp5e where the gene was deleted either during outer segment formation or after outer segments were fully formed. In both cases, the loss of Inpp5e led to severe defects in photoreceptor outer segment morphology and ultimately photoreceptor cell loss. The primary morphological defect consisted of outer segment shortening and reduction in the number of newly forming discs at the outer segment base. This was accompanied by structural abnormalities of the Golgi, mislocalized rhodopsin and an accumulation of extracellular vesicles. In addition, knockout cells showed disruption of the actin network. Together, these data demonstrate that Inpp5e plays a crucial role in maintaining the outer segment and the normal process of outer segment renewal depends on the activity of this enzyme.
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