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Chen Y, Dong X, Wang Y, Lv H, Chen N, Wang Z, Chen S, Chen P, Xiao S, Zhao J, Dong J. Molecular genetic features and clinical manifestations in Chinese familial cerebral cavernous malformation: from a novel KRIT1/CCM1 mutation (c.1119dupT) to an overall view. Front Neurosci 2023; 17:1184333. [PMID: 37214396 PMCID: PMC10192864 DOI: 10.3389/fnins.2023.1184333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 04/17/2023] [Indexed: 05/24/2023] Open
Abstract
Cerebral cavernous malformations (CCMs) are common vascular anomaly diseases in the central nervous system associated with seizures, cerebral microbleeds, or asymptomatic mostly. CCMs can be classified as sporadic or familial, with familial cerebral cavernous malformations (fCCMs) being the autosomal dominant manner with incomplete penetrance. Germline mutations of KRIT1, CCM2, and PDCD10 are associated with the pathogenesis of fCCMs. Till now, little is known about the fCCMs mutation spectrum in the Han Chinese population. In this study, we enrolled a large, aggregated family, 11/26 of the family members were diagnosed with CCMs by pathological or neuroradiological examination, with a high percentage (5/9) of focal spinal cord involvement. Genomic DNA sequencing verified a novel duplication mutation (c.1119dupT, p.L374Sfs*9) in exon 9 of the Krev interaction trapped 1 (KRIT1) gene. The mutation causes a frameshift and is predicted to generate a truncated KRIT1/CCM1 protein of 381 amino acids. All our findings confirm that c.1119dupT mutation of KRIT1 is associated with fCCMs, which enriched the CCM genes' mutational spectrum in the Chinese population and will be beneficial for deep insight into the pathogenesis of Chinese fCCMs. Additionally, with a retrospective study, we analyzed the molecular genetic features of Chinese fCCMs, most of the Chinese fCCMs variants are in the KRIT1 gene, and all these variants result in the functional deletion or insufficiency of the C-terminal FERM domain of the KRIT1 protein.
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Affiliation(s)
- Yanming Chen
- Department of Neurosurgery, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Xuchen Dong
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Ye Wang
- Health Management Center, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Haijun Lv
- Department of Pathology, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Nan Chen
- Suzhou Sano Precision Medicine Ltd., Suzhou, China
| | - Zhongyong Wang
- Department of Neurosurgery, Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Si Chen
- Suzhou Sano Precision Medicine Ltd., Suzhou, China
| | - Ping Chen
- Suzhou Sano Precision Medicine Ltd., Suzhou, China
| | - Sheng Xiao
- Department of Pathology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Jizong Zhao
- Department of Neurosurgery, Second Affiliated Hospital of Soochow University, Suzhou, China
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Jun Dong
- Department of Neurosurgery, Second Affiliated Hospital of Soochow University, Suzhou, China
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Identification of a novel LATS1 variant associated with familial cerebral cavernous malformations in a Chinese family. Neurol Sci 2022; 43:6389-6397. [DOI: 10.1007/s10072-022-06323-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 08/05/2022] [Indexed: 10/15/2022]
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Yang L, Wu J, Zhang J. A Novel CCM2 Gene Mutation Associated With Cerebral Cavernous Malformation. Front Neurol 2020; 11:70. [PMID: 32117029 PMCID: PMC7020567 DOI: 10.3389/fneur.2020.00070] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 01/20/2020] [Indexed: 01/01/2023] Open
Abstract
Cerebral cavernous malformations (CCMs) are the second most prevalent type of vascular malformation within the central nervous system. CCMs occur in two forms—sporadic and familial—the latter of which has an autosomal dominant mode of inheritance with incomplete penetrance and variable clinical expressivity. There are three genes considered to be associated with CCMs,—CCM1, which codes for KRIT1 protein; CCM2, which codes for MGC4607 protein; and CCM3, which codes for PDCD10 protein. To date, more than 74 gene mutations of CCM2 have been reported, and ~45% are deletion mutations. In this article, we disclose a novel CCM2 genetic variant (c.755delC, p.S252fs*40X) identified in a Chinese family to enrich the database of CCM2 genotypes.
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Affiliation(s)
- Lipeng Yang
- Department of Neurology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
| | - Jian Wu
- Department of Neurology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
| | - Jing Zhang
- Department of Neurology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
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