Mutations in NR2E3 can cause dominant or recessive retinal degenerations in the same family.

Escher, Pascal; Gouras, Peter; Roduit, Raphaël; Tiab, Leila; Bolay, Sylvain; Delarive, Tania; Chen, Shiming; Tsai, Chih-Cheng; Hayashi, Masanori; Zernant, Jana; Merriam, Joanna E; Mermod, Nicolas; Allikmets, Rando; Munier, Francis L; Schorderet, Daniel F (2009). Mutations in NR2E3 can cause dominant or recessive retinal degenerations in the same family. Human mutation, 30(3), pp. 342-351. Wiley-Blackwell 10.1002/humu.20858

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NR2E3, a photoreceptor-specific nuclear receptor (PNR), represses cone-specific genes and activates several rod-specific genes. In humans, mutations in NR2E3 have been associated with the recessively-inherited enhanced short-wavelength sensitive S-cone syndrome (ESCS) and, recently, with autosomal dominant (ad) retinitis pigmentosa (RP) (adRP). In the present work, we describe two additional families affected by adRP that carry a heterozygous c.166G>A (p.G56R) mutation in the NR2E3 gene. Functional analysis determined the dominant negative activity of the p.G56R mutant protein as the molecular mechanism of adRP. Interestingly, in one pedigree, the most common causal variant for ESCS (p.R311Q) cosegregated with the adRP-linked p.G56R mutation, and the compound heterozygotes exhibited an ESCS-like phenotype, which in 1 of the 2 cases was strikingly "milder" than the patients carrying the p.G56R mutation alone. Impaired repression of cone-specific genes by the corepressors atrophin-1 (dentatorubral-pallidoluysian atrophy [DRPLA] gene product) and atrophin-2 (arginine-glutamic acid dipeptide repeat [RERE] protein) appeared to be a molecular mechanism mediating the beneficial effect of the p.R311Q mutation. Finally, the functional dominance of the p.R311Q variant to the p.G56R mutation is discussed.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Ophthalmology

UniBE Contributor:

Escher, Pascal

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1059-7794

Publisher:

Wiley-Blackwell

Language:

English

Submitter:

PD Dr. Pascal Escher

Date Deposited:

10 Jul 2017 15:10

Last Modified:

31 Jul 2017 08:31

Publisher DOI:

10.1002/humu.20858

PubMed ID:

19006237

BORIS DOI:

10.7892/boris.101756

URI:

https://boris.unibe.ch/id/eprint/101756

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