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      https://www.ias.ac.in/article/fulltext/jgen/088/04/0399-0407

    • Keywords

       

      primary cilia; centrosome; transition zone; ciliopathies; photoreceptor; retinal degeneration; retina; RPGR; RP2; CEP290; RPGRIP1L; NPHP.

    • Abstract

       

      Dysfunction of primary cilia due to mutations in cilia-centrosomal proteins is associated with pleiotropic disorders. The primary (or sensory) cilium of photoreceptors mediates polarized trafficking of proteins for efficient phototransduction. Retinitis pigmentosa GTPase regulator (RPGR) is a cilia-centrosomal protein mutated in >70% of X-linked RP cases and 10%–20% of simplex RP males. Accumulating evidence indicates that RPGR may facilitate the orchestration of multiple ciliary protein complexes. Disruption of these complexes due to mutations in component proteins is an underlying cause of associated photoreceptor degeneration. Here, we highlight the recent developments in understanding the mechanism of cilia-dependent photoreceptor degeneration due to mutations in RPGR and RPGR-interacting proteins in severe genetic diseases, including retinitis pigmentosa, Leber congenital amaurosis (LCA), Joubert syndrome, and Senior–Loken syndrome, and explore the physiological relevance of photoreceptor ciliary protein complexes.

    • Author Affiliations

       

      Carlos A. Murga-Zamalloa1 Anand Swaroop2 Hemant Khanna1

      1. Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, MI 48105, USA
      2. Neurobiology-Neurodegeneration and Repair laboratory (N-NRL), National Eye Institute, National Institutes of Health, Bethesda, MD 20892, USA
    • Dates

       
  • Journal of Genetics | News

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