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Article

Clinical and Genetic Characteristics of Korean Congenital Stationary Night Blindness Patients

by 1,†, 1,†, 2,* and 1,*
1
Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam 13620, Korea
2
Institute of Vision Research, Department of Ophthalmology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, Korea
*
Authors to whom correspondence should be addressed.
These authors contributed equally and should be regarded as equivalent authors.
Academic Editor: Paul A. Sieving
Genes 2021, 12(6), 789; https://doi.org/10.3390/genes12060789
Received: 22 April 2021 / Revised: 11 May 2021 / Accepted: 18 May 2021 / Published: 21 May 2021
(This article belongs to the Special Issue Study of Inherited Retinal Diseases)
In this study, we investigated the clinical and genetic characteristics of 19 Korean patients with congenital stationary night blindness (CSNB) at two tertiary hospitals. Clinical evaluations, including fundus photography, spectral-domain optical coherence tomography, and electroretinography, were performed. Genetic analyses were conducted using targeted panel sequencing or whole exome sequencing. The median age was 5 (3–21) years at the initial examination, 2 (1–8) years at symptom onset, and 11 (5–28) years during the final visit. Genetic mutations were identified as CNGB1 and GNAT1 for the Riggs type (n = 2), TRPM1 and NYX for the complete type (n = 3), and CACNA1F (n = 14) for the incomplete type. Ten novel variants were identified, and best-corrected visual acuity (BCVA) and spherical equivalents (SE) were related to each type of CSNB. The Riggs and TRPM1 complete types presented mild myopia and good BCVA without strabismus and nystagmus, whereas the NYX complete and incomplete types showed mixed SE and poor BCVA with strabismus and nystagmus. This is the first case series of Korean patients with CSNB, and further studies with a larger number of subjects should be conducted to correlate the clinical and genetic aspects of CSNB. View Full-Text
Keywords: congenital stationary night blindness; gene; mutation; visual acuity congenital stationary night blindness; gene; mutation; visual acuity
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MDPI and ACS Style

Kim, H.-M.; Joo, K.; Han, J.; Woo, S.-J. Clinical and Genetic Characteristics of Korean Congenital Stationary Night Blindness Patients. Genes 2021, 12, 789. https://doi.org/10.3390/genes12060789

AMA Style

Kim H-M, Joo K, Han J, Woo S-J. Clinical and Genetic Characteristics of Korean Congenital Stationary Night Blindness Patients. Genes. 2021; 12(6):789. https://doi.org/10.3390/genes12060789

Chicago/Turabian Style

Kim, Hyeong-Min, Kwangsic Joo, Jinu Han, and Se-Joon Woo. 2021. "Clinical and Genetic Characteristics of Korean Congenital Stationary Night Blindness Patients" Genes 12, no. 6: 789. https://doi.org/10.3390/genes12060789

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