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Xing F, Du J. Expansion of the mutation and phenotypic spectrum of hereditary spastic paraplegia. Neurol Sci 2022; 43:4989-4996. [DOI: 10.1007/s10072-022-05921-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 01/20/2022] [Indexed: 12/01/2022]
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Wang S, Wang Y, Wu Y, Zhang J, Zhang W, Li C, Song X. A novel compound heterozygous SPG7 variant is associated with progressive spastic ataxia and persecutory delusions found in Chinese patients: two case reports. BMC Neurol 2022; 22:200. [PMID: 35637455 PMCID: PMC9150360 DOI: 10.1186/s12883-022-02706-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Accepted: 05/10/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Hereditary spastic paraplegia 7 (SPG7) is one of the subtypes of autosomal-recessive hereditary spastic paraplegia, which is a clinically heterogeneous neurodegenerative disorder. SPG7 often displays a complicated phenotype, including optic atrophy, ophthalmoparesis, and impaired emotional communication. In the Chinese population, sporadic cases of SPG7 variant-associated spastic ataxia are rarely reported. CASE PRESENTATION We carefully analysed the clinical features, imaging and genetic tests of two sporadic patients with SPG7, both from the Hebei region of China. One patient presented with progressive bilateral lower limb weakness, spastic-ataxia and no cognitive impairment. Brain MRI revealed mild cerebellar atrophy. Genetic analysis revealed c.1150_1151insCTAC (p.G384Afs*13) frameshift variant and exon1-3 heterozygous deletion. The other patient presented with progressive bilateral lower limb weakness, ataxia, dysarthria and a mild psychosis associated with persecutory delusions, which drew almost no attention, in addition to mild cognitive impairments characterized by a decrease in verbal memory and executive function. Genetic analysis identified two heterozygous variants in the SPG7 gene: c.1150_1151insCTAC (p.G384Afs*13) and c.1496delC (p.Q500Sfs*13). CONCLUSIONS The c.1496delC (p.Q500Sfs*13) variant in exon 11 has not been reported before. The c.1150_1151insCTAC variant is speculated to be a hotspot variant in the Chinese population. Patients with SPG7 may have cognitive impairments and psychosis, displaying specific characteristics, which should be of concern.
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Affiliation(s)
- Shan Wang
- Department of Neurology, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, Hebei, China
| | - Yaye Wang
- Department of Neurology, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, Hebei, China.,Neurological Laboratory of Hebei Province, Shijiazhuang, Hebei, 050000, People's Republic of China
| | - Yue Wu
- Department of Neurology, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, Hebei, China.,Neurological Laboratory of Hebei Province, Shijiazhuang, Hebei, 050000, People's Republic of China
| | - Jinru Zhang
- Department of Neurology, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, Hebei, China.,Neurological Laboratory of Hebei Province, Shijiazhuang, Hebei, 050000, People's Republic of China
| | - Weilin Zhang
- Department of Neurology, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, Hebei, China
| | - Chang Li
- Department of Neurology, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, Hebei, China
| | - Xueqin Song
- Department of Neurology, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, Hebei, China. .,Neurological Laboratory of Hebei Province, Shijiazhuang, Hebei, 050000, People's Republic of China.
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Classification of Dystonia. Life (Basel) 2022; 12:life12020206. [PMID: 35207493 PMCID: PMC8875209 DOI: 10.3390/life12020206] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/15/2022] [Accepted: 01/24/2022] [Indexed: 12/23/2022] Open
Abstract
Dystonia is a hyperkinetic movement disorder characterized by abnormal movement or posture caused by excessive muscle contraction. Because of its wide clinical spectrum, dystonia is often underdiagnosed or misdiagnosed. In clinical practice, dystonia could often present in association with other movement disorders. An accurate physical examination is essential to describe the correct phenomenology. To help clinicians reaching the proper diagnosis, several classifications of dystonia have been proposed. The current classification consists of axis I, clinical characteristics, and axis II, etiology. Through the application of this classification system, movement disorder specialists could attempt to correctly characterize dystonia and guide patients to the most effective treatment. The aim of this article is to describe the phenomenological spectrum of dystonia, the last approved dystonia classification, and new emerging knowledge.
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Schiavoni S, Spagnoli C, Rizzi S, Salerno GG, Frattini D, Pisani F, Fusco C. Paediatric-onset hereditary spastic paraplegias: a retrospective cohort study. Dev Med Child Neurol 2020; 62:1068-1074. [PMID: 32277485 DOI: 10.1111/dmcn.14547] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/11/2020] [Indexed: 12/12/2022]
Abstract
AIM To describe the clinical and neurogenetic spectrum of paediatric-onset hereditary spastic paraplegias (HSPs) diagnosed in our unit. METHOD We report on 47 patients (30 males, 17 females; mean [SD] age 12y 7mo [6y 2mo], range 4-34y) clinically diagnosed with an HSP at the Child Neurology Unit, IRCCS-ASMN (Reggio Emilia, Italy) between 1990 and 2018, who were genetically investigated by means of single-gene direct sequencing and/or next-generation sequencing technologies (targeted panels, whole-exome sequencing [WES]). RESULTS Complex forms prevailed slightly (n=26), autosomal dominant being the main inheritance pattern (n=11), followed by recessive (n=5) and X-linked (n=1). A definite genetic diagnosis was achieved in 17 patients. Spastic paraplegia 3A (n=4) was the most frequent cause of autosomal dominant HSP in our cohort, while no genetic variant prevailed in autosomal recessive forms and pathogenic/likely pathogenic variants were disclosed in a wide range of different genes. INTERPRETATION We found wide phenotypic and genetic heterogeneity. With increasing accessibility to WES, a higher number of patients receive a diagnosis, allowing detection of variants in ultra-rare disease-causing genes and refining genotype-phenotype correlations. WHAT THIS PAPER ADDS A genetic diagnosis of paediatric-onset hereditary spastic paraplegia was achieved in one-third of patients. Pathogenic/likely pathogenic variants in rare genes were found. Genotypic and phenotypic heterogeneity favours targeted panel/whole-exome sequencing for diagnosis.
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Affiliation(s)
- Silvia Schiavoni
- Child Neurology Unit, Department of Paediatrics, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Carlotta Spagnoli
- Child Neurology Unit, Department of Paediatrics, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Susanna Rizzi
- Child Neurology Unit, Department of Paediatrics, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Grazia G Salerno
- Child Neurology Unit, Department of Paediatrics, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Daniele Frattini
- Child Neurology Unit, Department of Paediatrics, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Francesco Pisani
- Child Neuropsychiatry Unit, Neuroscience Division, Medicine & Surgery Department, University of Parma, Parma, Italy
| | - Carlo Fusco
- Child Neurology Unit, Department of Paediatrics, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy.,Paediatric Neurophysiology Laboratory, Department of Paediatrics, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
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Schaefer SM, Szekely AM, Moeller JJ, Tinaz S. Hereditary spastic paraplegia presenting as limb dystonia with a rare SPG7 mutation. Neurol Clin Pract 2018; 8:e49-e50. [PMID: 30588391 DOI: 10.1212/cpj.0000000000000552] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 07/14/2018] [Indexed: 11/15/2022]
Affiliation(s)
- Sara M Schaefer
- Department of Neurology, Yale School of Medicine, Yale University, New Haven, CT
| | - Anna M Szekely
- Department of Neurology, Yale School of Medicine, Yale University, New Haven, CT
| | - Jeremy J Moeller
- Department of Neurology, Yale School of Medicine, Yale University, New Haven, CT
| | - Sule Tinaz
- Department of Neurology, Yale School of Medicine, Yale University, New Haven, CT
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Zhang X, Zhang L, Wu Y, Li G, Chen S, Xia Y, Li H. Identification of novel compound heterozygous SPG7 mutations-related hereditary spastic paraplegia in a Chinese family: a case report. BMC Neurol 2018; 18:196. [PMID: 30497413 PMCID: PMC6263041 DOI: 10.1186/s12883-018-1199-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 11/16/2018] [Indexed: 11/10/2022] Open
Abstract
Background Autosomal recessive hereditary spastic paraplegias (ARHSPs) are a group of clinically and genetically heterogeneous neurodegenerative diseases with progressive spasticity and weakness in the lower limbs. Mutations in the Spastic Paraplegia gene 7 (SPG7) account for about 5–21% of ARHSP cases. However, in Asians, few reports about the mutations exist. In this study, we firstly report a novel finding from a Chinese family with compound heterozygous SPG7 mutations, in which three siblings were affected with a complicated form of ARHSP. Case presentation A 56-year-old man presented with progressive stiffness, weakness and ataxia in the lower limbs. Two sisters of him had similar symptoms and dysarthria. Brain magnetic resonance imaging (MRI) revealed cerebellar atrophy in each of the patients. Genetic analysis, which exerted a targeted next generation sequencing (NGS) panel covering 917 comprehensive ataxia genes to the proband, followed by Sanger sequencing of candidate genes in other eight family members, was used to find the etiology of the disease. Ultimately, we identified compound heterozygous SPG7 mutations with two mutations: (c.1150_1150-1insCTAC and c.2062C > T, p.Arg688Trp) and one single nucleotide polymorphism (c.2063G > A, p.Arg688Gln). Conclusions The four bases insertion mutation (4bIM) was predicted to cause frameshift mutation or affect the splicing, and the last two variants were led to a stop codon mutation (p.Arg688Ter). As located in highly conserved positions and encoded paraplegin, the mutations were speculated to result in a truncated or defective protein and would be pathogenic factors of the disease. This paper proves to be the first case report of SPG7 mutation in ARHSP reported in Chinese population. Our findings widen the spectrum of SPG7 mutations of ARHSP and indicate that the SPG7 mutation is an important cause of adult-onset undiagnosed ataxia. Electronic supplementary material The online version of this article (10.1186/s12883-018-1199-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xiaoqian Zhang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang avenue, Wuhan, 430022, Hubei, China
| | - Lei Zhang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang avenue, Wuhan, 430022, Hubei, China
| | - Yanqing Wu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang avenue, Wuhan, 430022, Hubei, China
| | - Gang Li
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang avenue, Wuhan, 430022, Hubei, China
| | - Shengcai Chen
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang avenue, Wuhan, 430022, Hubei, China
| | - Yuanpeng Xia
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang avenue, Wuhan, 430022, Hubei, China.
| | - Hongge Li
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang avenue, Wuhan, 430022, Hubei, China.
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