A frequent variant in the Japanese population determines quasi-Mendelian inheritance of rare retinal ciliopathy

Nikopoulos, Konstantinos and Cisarova, Katarina and Quinodoz, Mathieu and Koskiniemi-Kuendig, Hanna and Miyake, Noriko and Farinelli, Pietro and Rehman, Atta Ur and Khan, Muhammad Imran and Prunotto, Andrea and Akiyama, Masato and Kamatani, Yoichiro and Terao, Chikashi and Miya, Fuyuki and Ikeda, Yasuhiro and Ueno, Shinji and Fuse, Nobuo and Murakami, Akira and Wada, Yuko and Terasaki, Hiroko and Sonoda, Koh-Hei and Ishibashi, Tatsuro and Kubo, Michiaki and Cremers, Frans P. M. and Kutalik, Zoltán and Matsumoto, Naomichi and Nishiguchi, Koji M. and Nakazawa, Toru and Rivolta, Carlo. (2019) A frequent variant in the Japanese population determines quasi-Mendelian inheritance of rare retinal ciliopathy. Nature Communications, 10 (1). p. 2884.

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Hereditary retinal degenerations (HRDs) are Mendelian diseases characterized by progressive blindness and caused by ultra-rare mutations. In a genomic screen of 331 unrelated Japanese patients, we identify a disruptive Alu insertion and a nonsense variant (p.Arg1933*) in the ciliary gene RP1, neither of which are rare alleles in Japan. p.Arg1933* is almost polymorphic (frequency = 0.6%, amongst 12,000 individuals), does not cause disease in homozygosis or heterozygosis, and yet is significantly enriched in HRD patients (frequency = 2.1%, i.e., a 3.5-fold enrichment; p-value = 9.2 × 10; -5; ). Familial co-segregation and association analyses show that p.Arg1933* can act as a Mendelian mutation in trans with the Alu insertion, but might also associate with disease in combination with two alleles in the EYS gene in a non-Mendelian pattern of heredity. Our results suggest that rare conditions such as HRDs can be paradoxically determined by relatively common variants, following a quasi-Mendelian model linking monogenic and complex inheritance.
Faculties and Departments:03 Faculty of Medicine
09 Associated Institutions > Institute of Molecular and Clinical Ophthalmology Basel (IOB)
UniBasel Contributors:Rivolta, Carlo
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Nature Publishing Group
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:10 Feb 2021 04:11
Deposited On:22 Dec 2020 07:45

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