Novel RP1L1 variants and genotype-photoreceptor microstructural phenotype associations in cohort of Japanese patients with occult macular dystrophy

Kaoru Fujinami, Shuhei Kameya, Sachiko Kikuchi, Shinji Ueno, Mineo Kondo, Takaaki Hayashi, Kei Shinoda, Shigeki Machida, Kazuki Kuniyoshi, Yuichi Kawamura, Masakazu Akahori, Kazutoshi Yoshitake, Satoshi Katagiri, Ayami Nakanishi, Hiroyuki Sakuramoto, Yoko Ozawa, Kazuo Tsubota, Kunihiko Yamaki, Atsushi Mizota, Hiroko TerasakiYozo Miyake, Takeshi Iwata, Kazushige Tsunoda

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

PURPOSE. To determine the clinical and genetic characteristics of Japanese patients with occult macular dystrophy (OMD) in a nationwide multicenter study. METHODS. Twenty-three patients from 21 families with clinically diagnosed OMD were studied at 10 institutions throughout Japan. Ophthalmologic examinations including spectral-domain optic coherence tomography were performed. Patients were classified into two phenotype groups: a classical group having both blurred ellipsoid zone and absence of interdigitation zone of the photoreceptors, and a nonclassical group lacking at least one of these two features. Whole-exome sequencing, direct sequencing, and in silico molecular analysis were performed to detect the pathogenic RP1L1 variants. Statistical associations between the phenotype and genotypes based on the presence of pathogenic RP1L1 variants were investigated. RESULTS. There were 12 families with the classical findings and 9 families with the nonclassical findings. Nine pathogenic RP1L1 missense variants were identified in 12 families (57%) including three reported variants, namely, p.R45W, p.S1199C, and p.G1200A, and six novel variants, p.G221R, p.T1194M, p.T1196I, p.G1200D, p.G1200V, and p.V1201G. The pathogenic missense variants in seven families (33%) were located between amino acid numbers 1196 and 1201. A significant association was found between the photoreceptor microstructural phenotypes and molecular genotypes. CONCLUSIONS. The spectrum of the morphologic phenotypes and pathogenic RP1L1 variants was documented in a well-characterized Japanese cohort with OMD. A unique motif including six amino acids (1196-1201) downstream of the doublecortin domain could be a hot spot for RP1L1 pathogenic variants. The significant association of the morphologic phenotypes and genotypes indicates that there are two types of pathophysiology underlying the occult macular dysfunction syndrome: a hereditary OMD with the classical phenotype (Miyake’s disease), and a nonhereditary OMD-like syndrome with progressive occult maculopathy.

Original languageEnglish
Pages (from-to)4837-4846
Number of pages10
JournalInvestigative Ophthalmology and Visual Science
Volume57
Issue number11
DOIs
Publication statusPublished - 2016 Sep 1

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Macular Degeneration
Genotype
Phenotype
Genetic Association Studies
Exome
Amino Acids
Computer Simulation
Multicenter Studies
Japan
Tomography

Keywords

  • Electroretinogram
  • Macular dystrophy
  • Miyake’s disease
  • Occular macular dystropphy
  • RP1L1

ASJC Scopus subject areas

  • Medicine(all)
  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Cite this

Novel RP1L1 variants and genotype-photoreceptor microstructural phenotype associations in cohort of Japanese patients with occult macular dystrophy. / Fujinami, Kaoru; Kameya, Shuhei; Kikuchi, Sachiko; Ueno, Shinji; Kondo, Mineo; Hayashi, Takaaki; Shinoda, Kei; Machida, Shigeki; Kuniyoshi, Kazuki; Kawamura, Yuichi; Akahori, Masakazu; Yoshitake, Kazutoshi; Katagiri, Satoshi; Nakanishi, Ayami; Sakuramoto, Hiroyuki; Ozawa, Yoko; Tsubota, Kazuo; Yamaki, Kunihiko; Mizota, Atsushi; Terasaki, Hiroko; Miyake, Yozo; Iwata, Takeshi; Tsunoda, Kazushige.

In: Investigative Ophthalmology and Visual Science, Vol. 57, No. 11, 01.09.2016, p. 4837-4846.

Research output: Contribution to journalArticle

Fujinami, K, Kameya, S, Kikuchi, S, Ueno, S, Kondo, M, Hayashi, T, Shinoda, K, Machida, S, Kuniyoshi, K, Kawamura, Y, Akahori, M, Yoshitake, K, Katagiri, S, Nakanishi, A, Sakuramoto, H, Ozawa, Y, Tsubota, K, Yamaki, K, Mizota, A, Terasaki, H, Miyake, Y, Iwata, T & Tsunoda, K 2016, 'Novel RP1L1 variants and genotype-photoreceptor microstructural phenotype associations in cohort of Japanese patients with occult macular dystrophy', Investigative Ophthalmology and Visual Science, vol. 57, no. 11, pp. 4837-4846. https://doi.org/10.1167/iovs.16-19670
Fujinami, Kaoru ; Kameya, Shuhei ; Kikuchi, Sachiko ; Ueno, Shinji ; Kondo, Mineo ; Hayashi, Takaaki ; Shinoda, Kei ; Machida, Shigeki ; Kuniyoshi, Kazuki ; Kawamura, Yuichi ; Akahori, Masakazu ; Yoshitake, Kazutoshi ; Katagiri, Satoshi ; Nakanishi, Ayami ; Sakuramoto, Hiroyuki ; Ozawa, Yoko ; Tsubota, Kazuo ; Yamaki, Kunihiko ; Mizota, Atsushi ; Terasaki, Hiroko ; Miyake, Yozo ; Iwata, Takeshi ; Tsunoda, Kazushige. / Novel RP1L1 variants and genotype-photoreceptor microstructural phenotype associations in cohort of Japanese patients with occult macular dystrophy. In: Investigative Ophthalmology and Visual Science. 2016 ; Vol. 57, No. 11. pp. 4837-4846.
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abstract = "PURPOSE. To determine the clinical and genetic characteristics of Japanese patients with occult macular dystrophy (OMD) in a nationwide multicenter study. METHODS. Twenty-three patients from 21 families with clinically diagnosed OMD were studied at 10 institutions throughout Japan. Ophthalmologic examinations including spectral-domain optic coherence tomography were performed. Patients were classified into two phenotype groups: a classical group having both blurred ellipsoid zone and absence of interdigitation zone of the photoreceptors, and a nonclassical group lacking at least one of these two features. Whole-exome sequencing, direct sequencing, and in silico molecular analysis were performed to detect the pathogenic RP1L1 variants. Statistical associations between the phenotype and genotypes based on the presence of pathogenic RP1L1 variants were investigated. RESULTS. There were 12 families with the classical findings and 9 families with the nonclassical findings. Nine pathogenic RP1L1 missense variants were identified in 12 families (57{\%}) including three reported variants, namely, p.R45W, p.S1199C, and p.G1200A, and six novel variants, p.G221R, p.T1194M, p.T1196I, p.G1200D, p.G1200V, and p.V1201G. The pathogenic missense variants in seven families (33{\%}) were located between amino acid numbers 1196 and 1201. A significant association was found between the photoreceptor microstructural phenotypes and molecular genotypes. CONCLUSIONS. The spectrum of the morphologic phenotypes and pathogenic RP1L1 variants was documented in a well-characterized Japanese cohort with OMD. A unique motif including six amino acids (1196-1201) downstream of the doublecortin domain could be a hot spot for RP1L1 pathogenic variants. The significant association of the morphologic phenotypes and genotypes indicates that there are two types of pathophysiology underlying the occult macular dysfunction syndrome: a hereditary OMD with the classical phenotype (Miyake’s disease), and a nonhereditary OMD-like syndrome with progressive occult maculopathy.",
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T1 - Novel RP1L1 variants and genotype-photoreceptor microstructural phenotype associations in cohort of Japanese patients with occult macular dystrophy

AU - Fujinami, Kaoru

AU - Kameya, Shuhei

AU - Kikuchi, Sachiko

AU - Ueno, Shinji

AU - Kondo, Mineo

AU - Hayashi, Takaaki

AU - Shinoda, Kei

AU - Machida, Shigeki

AU - Kuniyoshi, Kazuki

AU - Kawamura, Yuichi

AU - Akahori, Masakazu

AU - Yoshitake, Kazutoshi

AU - Katagiri, Satoshi

AU - Nakanishi, Ayami

AU - Sakuramoto, Hiroyuki

AU - Ozawa, Yoko

AU - Tsubota, Kazuo

AU - Yamaki, Kunihiko

AU - Mizota, Atsushi

AU - Terasaki, Hiroko

AU - Miyake, Yozo

AU - Iwata, Takeshi

AU - Tsunoda, Kazushige

PY - 2016/9/1

Y1 - 2016/9/1

N2 - PURPOSE. To determine the clinical and genetic characteristics of Japanese patients with occult macular dystrophy (OMD) in a nationwide multicenter study. METHODS. Twenty-three patients from 21 families with clinically diagnosed OMD were studied at 10 institutions throughout Japan. Ophthalmologic examinations including spectral-domain optic coherence tomography were performed. Patients were classified into two phenotype groups: a classical group having both blurred ellipsoid zone and absence of interdigitation zone of the photoreceptors, and a nonclassical group lacking at least one of these two features. Whole-exome sequencing, direct sequencing, and in silico molecular analysis were performed to detect the pathogenic RP1L1 variants. Statistical associations between the phenotype and genotypes based on the presence of pathogenic RP1L1 variants were investigated. RESULTS. There were 12 families with the classical findings and 9 families with the nonclassical findings. Nine pathogenic RP1L1 missense variants were identified in 12 families (57%) including three reported variants, namely, p.R45W, p.S1199C, and p.G1200A, and six novel variants, p.G221R, p.T1194M, p.T1196I, p.G1200D, p.G1200V, and p.V1201G. The pathogenic missense variants in seven families (33%) were located between amino acid numbers 1196 and 1201. A significant association was found between the photoreceptor microstructural phenotypes and molecular genotypes. CONCLUSIONS. The spectrum of the morphologic phenotypes and pathogenic RP1L1 variants was documented in a well-characterized Japanese cohort with OMD. A unique motif including six amino acids (1196-1201) downstream of the doublecortin domain could be a hot spot for RP1L1 pathogenic variants. The significant association of the morphologic phenotypes and genotypes indicates that there are two types of pathophysiology underlying the occult macular dysfunction syndrome: a hereditary OMD with the classical phenotype (Miyake’s disease), and a nonhereditary OMD-like syndrome with progressive occult maculopathy.

AB - PURPOSE. To determine the clinical and genetic characteristics of Japanese patients with occult macular dystrophy (OMD) in a nationwide multicenter study. METHODS. Twenty-three patients from 21 families with clinically diagnosed OMD were studied at 10 institutions throughout Japan. Ophthalmologic examinations including spectral-domain optic coherence tomography were performed. Patients were classified into two phenotype groups: a classical group having both blurred ellipsoid zone and absence of interdigitation zone of the photoreceptors, and a nonclassical group lacking at least one of these two features. Whole-exome sequencing, direct sequencing, and in silico molecular analysis were performed to detect the pathogenic RP1L1 variants. Statistical associations between the phenotype and genotypes based on the presence of pathogenic RP1L1 variants were investigated. RESULTS. There were 12 families with the classical findings and 9 families with the nonclassical findings. Nine pathogenic RP1L1 missense variants were identified in 12 families (57%) including three reported variants, namely, p.R45W, p.S1199C, and p.G1200A, and six novel variants, p.G221R, p.T1194M, p.T1196I, p.G1200D, p.G1200V, and p.V1201G. The pathogenic missense variants in seven families (33%) were located between amino acid numbers 1196 and 1201. A significant association was found between the photoreceptor microstructural phenotypes and molecular genotypes. CONCLUSIONS. The spectrum of the morphologic phenotypes and pathogenic RP1L1 variants was documented in a well-characterized Japanese cohort with OMD. A unique motif including six amino acids (1196-1201) downstream of the doublecortin domain could be a hot spot for RP1L1 pathogenic variants. The significant association of the morphologic phenotypes and genotypes indicates that there are two types of pathophysiology underlying the occult macular dysfunction syndrome: a hereditary OMD with the classical phenotype (Miyake’s disease), and a nonhereditary OMD-like syndrome with progressive occult maculopathy.

KW - Electroretinogram

KW - Macular dystrophy

KW - Miyake’s disease

KW - Occular macular dystropphy

KW - RP1L1

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