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Japanese Journal of Ophthalmology
Erschienen in: Japanese Journal of Ophthalmology 1/2024

09.12.2023 | Clinical Investigation

Genotypes and clinical features of RHO-associated retinitis pigmentosa in a Japanese population

verfasst von: Saki Tsutsui, Yusuke Murakami, Kohta Fujiwara, Yoshito Koyanagi, Masato Akiyama, Atsunobu Takeda, Yasuhiro Ikeda, Koh-Hei Sonoda

Erschienen in: Japanese Journal of Ophthalmology | Ausgabe 1/2024

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Abstract

Purpose

To report the genotypes and clinical features of RHO-associated retinitis pigmentosa (RHO-RP) in the Kyushu region of Japan.

Study Design

Retrospective, single-center study.

Methods

Sixteen RP patients with pathogenic RHO variants seen at Kyushu University Hospital were investigated. Clinical data including age, best-corrected visual acuity (BCVA) in logarithm of the minimum angle of resolution (logMAR) units, visual field, fundus photography, and optical coherence tomography were retrospectively obtained. Visual outcomes were compared between classical and sector phenotypes and among genetic variants.

Results

The mean age at the first visit was 54.0 ± 15.7 years, with a mean follow-up of 7.6 ± 4.0 years. Fourteen patients (87.5%) showed the classical RP phenotype, of whom four were associated with p.[Pro23Leu] and two had p.[Pro347Leu] variants. In addition, two patients with the sector phenotype harbored p.[Ala164Val] variants. Among the classical RHO-RP patients, the mean BCVA decreased from 0.60 to 1.08 logMAR over the follow-up period (7.4 ± 4.1 years) whereas BCVA was preserved at 0.04 logMAR in sector RHO-RP patients (9.0 ± 3.0 years). Genotype-to-phenotype analysis demonstrated that p.[Pro347Leu] was associated with severe vision loss at an earlier age. Macular complications such as epiretinal membrane and cystoid macular edema were observed in 5 classical RHO-RP patients.

Conclusion

p.[Pro23Leu], but not p.[Pro23His], was a frequent variant causing RHO-RP in the Kyushu region of Japan. As reported in previous studies, patients with the p.[Pro347Leu] variant showed a more severe phenotype, and variants causing sector RHO-RP were associated with a good prognosis.
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Metadaten
Titel
Genotypes and clinical features of RHO-associated retinitis pigmentosa in a Japanese population
verfasst von
Saki Tsutsui
Yusuke Murakami
Kohta Fujiwara
Yoshito Koyanagi
Masato Akiyama
Atsunobu Takeda
Yasuhiro Ikeda
Koh-Hei Sonoda
Publikationsdatum
09.12.2023
Verlag
Springer Japan
Erschienen in
Japanese Journal of Ophthalmology / Ausgabe 1/2024
Print ISSN: 0021-5155
Elektronische ISSN: 1613-2246
DOI
https://doi.org/10.1007/s10384-023-01036-0

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