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Identification of a Novel CCM1 Frameshift Mutation in a Chinese Han Family With Multiple Cerebral Cavernous Malformations

Cerebral cavernous malformations (CCMs) are vascular lesions that predominantly occur in the brain. CCMs can be sporadic or hereditary in an autosomal dominant manner. The genes harboring variants of familial CCMs (FCCMs) include CCM1/KRIT1, CCM2/MGC4607, and CCM3/PDCD10. In this study, we identifie...

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Autores principales: Zhang, Fan, Xue, Yiteng, Zhang, Feng, Wei, Xiaoming, Zhou, Zhisong, Ma, Zhaoru, Wang, Xiaosong, Shen, Hong, Li, Yujun, Cui, Xiaoying, Liu, Li
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7538688/
https://www.ncbi.nlm.nih.gov/pubmed/33071727
http://dx.doi.org/10.3389/fnins.2020.525986
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author Zhang, Fan
Xue, Yiteng
Zhang, Feng
Wei, Xiaoming
Zhou, Zhisong
Ma, Zhaoru
Wang, Xiaosong
Shen, Hong
Li, Yujun
Cui, Xiaoying
Liu, Li
author_facet Zhang, Fan
Xue, Yiteng
Zhang, Feng
Wei, Xiaoming
Zhou, Zhisong
Ma, Zhaoru
Wang, Xiaosong
Shen, Hong
Li, Yujun
Cui, Xiaoying
Liu, Li
author_sort Zhang, Fan
collection PubMed
description Cerebral cavernous malformations (CCMs) are vascular lesions that predominantly occur in the brain. CCMs can be sporadic or hereditary in an autosomal dominant manner. The genes harboring variants of familial CCMs (FCCMs) include CCM1/KRIT1, CCM2/MGC4607, and CCM3/PDCD10. In this study, we identified a novel CCM1/KRIT1 mutation in a Chinese family with FCCMs. This family consists of 20 members, and 6 of them had been diagnosed with CCMs. The proband patient is a 17-year-old female who has suffered from CCM-related intracranial hemorrhage four times. Magnetic resonance imaging (MRI) revealed four lesions in the different brain regions and one lesion has progressively enlarged. The pathological histology confirmed CCMs. Whole exome sequencing revealed a novel deletion mutation (c.1635delA) within exon 15 of CCM1/KRIT1 gene in the proband patient, her mother, and her uncle who had CCMs. This frameshift mutation led to a premature termination codon (PTC) at nucleotides 1652–1654. We also detected that the CCM1 mRNA levels in the blood lymphocytes of the family members with CCMs were reduced by 46.4% compared to that in healthy controls. Collectively, our results suggested that the CCM1 mutation could potentially be a causative factor for FCCMs in the Chinese family and the reduction of CCM1 mRNA expression in the blood lymphocytes of the patients might be a potential biomarker for the diagnosis and prognosis of CCMs. Our findings expanded the spectrum of CCM mutations and helped to guide genetic counseling and early genetic diagnosis for at-risk family members.
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spelling pubmed-75386882020-10-15 Identification of a Novel CCM1 Frameshift Mutation in a Chinese Han Family With Multiple Cerebral Cavernous Malformations Zhang, Fan Xue, Yiteng Zhang, Feng Wei, Xiaoming Zhou, Zhisong Ma, Zhaoru Wang, Xiaosong Shen, Hong Li, Yujun Cui, Xiaoying Liu, Li Front Neurosci Neuroscience Cerebral cavernous malformations (CCMs) are vascular lesions that predominantly occur in the brain. CCMs can be sporadic or hereditary in an autosomal dominant manner. The genes harboring variants of familial CCMs (FCCMs) include CCM1/KRIT1, CCM2/MGC4607, and CCM3/PDCD10. In this study, we identified a novel CCM1/KRIT1 mutation in a Chinese family with FCCMs. This family consists of 20 members, and 6 of them had been diagnosed with CCMs. The proband patient is a 17-year-old female who has suffered from CCM-related intracranial hemorrhage four times. Magnetic resonance imaging (MRI) revealed four lesions in the different brain regions and one lesion has progressively enlarged. The pathological histology confirmed CCMs. Whole exome sequencing revealed a novel deletion mutation (c.1635delA) within exon 15 of CCM1/KRIT1 gene in the proband patient, her mother, and her uncle who had CCMs. This frameshift mutation led to a premature termination codon (PTC) at nucleotides 1652–1654. We also detected that the CCM1 mRNA levels in the blood lymphocytes of the family members with CCMs were reduced by 46.4% compared to that in healthy controls. Collectively, our results suggested that the CCM1 mutation could potentially be a causative factor for FCCMs in the Chinese family and the reduction of CCM1 mRNA expression in the blood lymphocytes of the patients might be a potential biomarker for the diagnosis and prognosis of CCMs. Our findings expanded the spectrum of CCM mutations and helped to guide genetic counseling and early genetic diagnosis for at-risk family members. Frontiers Media S.A. 2020-09-23 /pmc/articles/PMC7538688/ /pubmed/33071727 http://dx.doi.org/10.3389/fnins.2020.525986 Text en Copyright © 2020 Zhang, Xue, Zhang, Wei, Zhou, Ma, Wang, Shen, Li, Cui and Liu. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Neuroscience
Zhang, Fan
Xue, Yiteng
Zhang, Feng
Wei, Xiaoming
Zhou, Zhisong
Ma, Zhaoru
Wang, Xiaosong
Shen, Hong
Li, Yujun
Cui, Xiaoying
Liu, Li
Identification of a Novel CCM1 Frameshift Mutation in a Chinese Han Family With Multiple Cerebral Cavernous Malformations
title Identification of a Novel CCM1 Frameshift Mutation in a Chinese Han Family With Multiple Cerebral Cavernous Malformations
title_full Identification of a Novel CCM1 Frameshift Mutation in a Chinese Han Family With Multiple Cerebral Cavernous Malformations
title_fullStr Identification of a Novel CCM1 Frameshift Mutation in a Chinese Han Family With Multiple Cerebral Cavernous Malformations
title_full_unstemmed Identification of a Novel CCM1 Frameshift Mutation in a Chinese Han Family With Multiple Cerebral Cavernous Malformations
title_short Identification of a Novel CCM1 Frameshift Mutation in a Chinese Han Family With Multiple Cerebral Cavernous Malformations
title_sort identification of a novel ccm1 frameshift mutation in a chinese han family with multiple cerebral cavernous malformations
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7538688/
https://www.ncbi.nlm.nih.gov/pubmed/33071727
http://dx.doi.org/10.3389/fnins.2020.525986
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