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Genetic and clinical heterogeneity of Moyamoya diseaseFarrugia, Luca 12 July 2017 (has links)
BACKGROUND: Moyamoya disease (MMD) is a chronic, occlusive cerebrovascular disease characterized by progressive stenosis of intracranial arteries, specifically the internal carotid arteries, and the compensatory formation of an abnormal vascular network at the base of the brain. The exact cause of MMD is still not well understood. Many factors including genetic, environmental, and immunologic have been associated with the disease. RNF213 is considered the main susceptibility gene, especially in Eastern Asian patients. The founder mutation, p.R4810K, has been associated strongly with MMD, especially in Japan and Korea but has been shown to have low penetrance and has never been described in non-Eastern Asian MMD cases. RNF213 encodes for an E3 ubiquitin-protein ligase with ATPase activity. It has described to regulate angiogenesis giving rise to the possibility that variants in RNF213 may play a role in cerebrovascular diseases other than MMD.
OBJECTIVES: The aims of this study were to determine if variation in the RNF213 gene contributes to MMD in a cohort of 15 unrelated patients with MMD of predominantly European descent, to investigate other potential genes implicated in MMD in these 15 patients, and to investigate if RNF213 also influences more common vascular phenotypes.
METHODS: Patient history, detailed family history and a blood sample were collected from 15 patients with well-characterized MMD. DNA was extracted from a peripheral venous blood sample, assessed for quality, and DNA concentration quantified by PicoGreen®. The extracted DNA was sent for whole exome sequencing. Genome_GPS_2.0 was used to carry out secondary analysis of sequencing data and all data were stored in Oracle TRC. The files were aligned using Novoalign, variants analyzed using GATK, visualized using IGV and annotated using BioR-Web. Variants of interest were determined using Ingenuity® Variant Analysis™. To determine if RNF213 also influences more common vascular phenotypes, previously collected and whole exome sequenced samples from the Mayo Clinic Florida Familial Cerebrovascular Diseases Registry were analyzed. Variants in RNF213 were determined using the same approach as for MMD.
RESULTS: Likely pathogenic variants in RNF213 were found in 13% (2/15) of patients. The p.R4810K variant has been previously published as the founder mutation for MMD in Eastern Asian populations. The affected patient was also of Eastern Asian origin. The other variant, p.R4019C, was found in a European descent case and has been described as a candidate pathogenic variant. Eight variants in five other genes previously associated with MMD were found. Of these, one previously reported variant, p.D455H in RPTN, was found in two patients. The other seven have not previously been described in MMD. In the analysis of the potential role for RNF213 in other cerebrovascular diseases, 54% (22/41) of African American patients had a non-synonymous, exonic variant in RNF213 with a MAF of less than 3%. A novel RNF213 variant was also found in a Caucasian patient who had a subarachnoid hemorrhage.
CONCLUSION: The p.R4810K variant in RNF213 was confirmed to only be associated with MMD in Eastern Asians and not found in other ethnicities. However, a variant in RNF213 was found in a Caucasian patient suggesting RNF213 may indeed be disease causing in patients of diverse origin. RNF213 may also be implicated in other cerebrovascular diseases suggesting a common pathogenesis while other genes also appear to be involved in the pathogenesis of MMD.
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Moyamoya disease patient mutations in the RING domain of RNF213 reduce its ubiquitin ligase activity and enhance NFκB activation and apoptosis in an AAA+ domain-dependent manner / もやもや病感受性遺伝子産物RNF213のRINGドメイン内もやもや病患者変異はユビキチンリガーゼ活性を低下させ、NFκB活性化およびアポトーシスをAAA+ドメイン依存的に促進するTakeda, Midori 23 September 2020 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(社会健康医学) / 甲第22749号 / 社医博第110号 / 新制||社医||11(附属図書館) / 京都大学大学院医学研究科社会健康医学系専攻 / (主査)教授 髙橋 良輔, 教授 髙折 晃史, 教授 中山 健夫 / 学位規則第4条第1項該当 / Doctor of Public Health / Kyoto University / DFAM
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Significant association of RNF213 p.R4810K, a moyamoya susceptibility variant, with coronary artery disease / もやもや病感受性多型であるRNF213 p.R4810Kは冠動脈疾患と有意に関連するMorimoto, Takaaki 25 March 2019 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(医学) / 甲第21666号 / 医博第4472号 / 新制||医||1035(附属図書館) / 京都大学大学院医学研究科医学専攻 / (主査)教授 松田 文彦, 教授 佐藤 俊哉, 教授 Shohab YOUSSEFIAN / 学位規則第4条第1項該当 / Doctor of Medical Science / Kyoto University / DFAM
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Lack of association between seropositivity of vasculopathy-related viruses and moyamoya disease / もやもや病と血管症関連ウイルスの抗体陽性率との関連解析Nakamura, Yasuhisa 23 May 2023 (has links)
京都大学 / 新制・課程博士 / 博士(社会健康医学) / 甲第24806号 / 社医博第130号 / 新制||社医||12(附属図書館) / 京都大学大学院医学研究科社会健康医学系専攻 / (主査)教授 松田 文彦, 教授 YOUSSEFIAN Shohab, 教授 永井 洋士 / 学位規則第4条第1項該当 / Doctor of Public Health / Kyoto University / DFAM
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