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Variation spectrum of MECP2 in Korean patients with Rett and Rett-like syndrome: a literature review and reevaluation of variants based on the ClinGen guideline

Journal of Human Genetics volume 67, pages 601–606 (2022)Cite this article

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Abstract

Rett syndrome (RTT) is a progressive neurodevelopmental disorder caused by variants in MECP2. Emerging evidence of ethnic specificity of genetic variations has allowed precise diagnostic approaches with tailored therapies. In this study, we reviewed the variation spectrum of MECP2 in Korean RTT(-like) patients and compared it with previous reports in multiple ethnic groups. We reevaluated variants found in Korean RTT patients according to the new Clinical Genome Resource guideline to reinterpret and reclassify variants of uncertain significance in MECP2. Among 377 cases, 56 (14.9%) showed pathogenic variants, and three novel variants, p.(Ala277Argfs*7), p.(Ala378Glyfs*8), and p.(Arg270_Ser332del), were identified. Comprehensive data from Korea revealed an overall consistent variation spectrum with those from other ethnicities. Through the reevaluation of variants, nine that previously had insufficient evidence for pathogenicity were reclassified into pathogenic variants. Our study provided insight on the genetic contribution of MECP2 in RTT and a useful background for genetic counseling in the Korean population.

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Author notes

  1. These authors contributed equally: Jee Ah Kim, Won Kyung Kwon.

Authors and Affiliations

  1. Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea

    Jee Ah Kim, Won Kyung Kwon, Jong-Won Kim & Ja-Hyun Jang

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  1. Jee Ah Kim
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Correspondence to Ja-Hyun Jang.

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Kim, J.A., Kwon, W.K., Kim, JW. et al. Variation spectrum of MECP2 in Korean patients with Rett and Rett-like syndrome: a literature review and reevaluation of variants based on the ClinGen guideline. J Hum Genet 67, 601–606 (2022). https://doi.org/10.1038/s10038-022-01044-x

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  • DOI: https://doi.org/10.1038/s10038-022-01044-x

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