オマタ　タク   OMATA Taku   小俣　卓    所属   医学部 医学科（附属八千代医療センター）    職種   准教授
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Identification of a pathogenic RNU4-2 variant in patients with mitochondrial disease: Broadening the spectrum of non-coding RNA gene variants in mitochondrial dysfunction
掲載誌名	正式名：Journal of human genetics 略　 称：J Hum Genet ISSNコード：1435232X/14345161
掲載区分	国外
巻・号・頁	pp.10.1038/s10038-025-01356-8
国際共著	国際共著
著者・共著者	Kohta Nakamura†, Yoshihito Kishita, Atsuko Imai-Okazaki, Taku Omata, Maki Nodera, Yukiko Yatsuka, Ayumu Sugiura, Naoyuki Matsumoto, Holger Prokisch, Hiroshi Matsumoto, Akira Ohtake, Kei Murayama, Yasushi Okazaki*
発行年月	2025/07
概要	Mitochondrial diseases are characterized by impaired energy production due to mitochondrial dysfunction. Despite advances in sequencing technologies, many cases remain genetically undiagnosed. We report two cases of mitochondrial disease harboring identical de novo variant in the non-coding RNA gene RNU4-2, previously associated with neurodevelopmental disorders. Re-analysis of whole genome sequencing data from 357 patients ascertained as possibly having mitochondrial disease (see Methods: Supplementary Data S1) identified two cases with a pathogenic RNU4-2 variant (GRCh38: chr.12:120291839: T > TA; NR_003137.2: n.64_65insT). Both patients exhibited decreased oxygen consumption rates and clinical features including developmental delay, microcephaly, short stature. This study provides the first evidence linking RNU4-2 variant to mitochondrial disease, expanding the phenotypic spectrum associated with this gene. Our findings highlight the importance of re-analyzing genomic data and considering non-coding RNA gene variants in mitochondrial disease diagnostics, potentially improving the diagnosis of previously unsolved cases.
DOI	10.1038/s10038-025-01356-8
PMID	40696135