Mutation in the intracellular chloride channel CLCC1 associated with autosomal recessive retinitis pigmentosa

Lin Li, Xiaodong Jiao, Ilaria D’Atri, Fumihito Ono, Ralph Nelson, Chi Chao Chan, Naoki Nakaya, Zhiwei Ma, Yan Ma, Xiaoying Cai, Longhua Zhang, Siying Lin, Abdul Hameed, Barry A. Chioza, Holly Hardy, Gavin Arno, Sarah Hull, Muhammad Imran Khan, James Fasham, Gaurav V. HarlalkaMichel Michaelides, Anthony T. Moore, Zeynep Hande Coban Akdemir, Shalini Jhangiani, James R. Lupski, Frans P.M. Cremers, Raheel Qamar, Ahmed Salman, John Chilton, Jay Self, Radha Ayyagari, Firoz Kabir, Muhammad Asif Naeem, Muhammad Ali, Javed Akram, Paul A. Sieving, Sheikh Riazuddin, Emma L. Baple, S. Amer Riazuddin, Andrew H. Crosby, J. Fielding Hejtmancik

Research output: Contribution to journalArticlepeer-review

Abstract

We identified a homozygous missense alteration (c.75C>A, p.D25E) in CLCC1, encoding a presumptive intracellular chloride channel highly expressed in the retina, associated with autosomal recessive retinitis pigmentosa (arRP) in eight consanguineous families of Pakistani descent. The p.D25E alteration decreased CLCC1 channel function accompanied by accumulation of mutant protein in granules within the ER lumen, while siRNA knockdown of CLCC1 mRNA induced apoptosis in cultured ARPE-19 cells. TALEN KO in zebrafish was lethal 11 days post fertilization. The depressed electroretinogram (ERG) cone response and cone spectral sensitivity of 5 dpf KO zebrafish and reduced eye size, retinal thickness, and expression of rod and cone opsins could be rescued by injection of wild type CLCC1 mRNA. Clcc1+/-KO mice showed decreased ERGs and photoreceptor number. Together these results strongly suggest that intracellular chloride transport by CLCC1 is a critical process in maintaining retinal integrity, and CLCC1 is crucial for survival and function of retinal cells.

Original languageEnglish (US)
Article numbere1007504
JournalPLoS genetics
Volume14
Issue number8
DOIs
StatePublished - Aug 2018
Externally publishedYes

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics
  • Genetics(clinical)
  • Cancer Research

Fingerprint Dive into the research topics of 'Mutation in the intracellular chloride channel CLCC1 associated with autosomal recessive retinitis pigmentosa'. Together they form a unique fingerprint.

Cite this