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Kumar A, Han Y, Oatts JT. Genetic changes and testing associated with childhood glaucoma: A systematic review. PLoS One 2024; 19:e0298883. [PMID: 38386645 PMCID: PMC10883561 DOI: 10.1371/journal.pone.0298883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 01/30/2024] [Indexed: 02/24/2024] Open
Abstract
Many forms of childhood glaucoma have been associated with underlying genetic changes, and variants in many genes have been described. Currently, testing is variable as there are no widely accepted guidelines for testing. This systematic review aimed to summarize the literature describing genetic changes and testing practices in childhood glaucoma. This systematic review was conducted in accordance with the Preferred Reporting Items for Systematic review and Meta-Analyses (PRISMA) 2020 guidelines and registered with Prospero (ID CRD42023400467). A comprehensive review of Pubmed, Embase, and Cochrane databases was performed from inception through March 2, 2023 using the search terms: (glaucoma) AND (pediatric OR childhood OR congenital OR child OR infant OR infantile) AND (gene OR genetic OR genotype OR locus OR genomic OR mutation OR variant OR test OR screen OR panel). Information was extracted regarding genetic variants including genotype-phenotype correlation. Risk of bias was assessed using the Newcastle-Ottawa Scale. Of 1,916 records screened, 196 studies met inclusion criteria and 53 genes were discussed. Among study populations, mean age±SD at glaucoma diagnosis was 8.94±9.54 years and 50.4% were male. The most common gene discussed was CYP1B1, evaluated in 109 (55.6%) studies. CYP1B1 variants were associated with region and population-specific prevalence ranging from 5% to 86% among those with primary congenital glaucoma. MYOC variants were discussed in 31 (15.8%) studies with prevalence up to 36% among patients with juvenile open angle glaucoma. FOXC1 variants were discussed in 25 (12.8%) studies, which demonstrated phenotypic severity dependent on degree of gene expression and type of mutation. Overall risk of bias was low; the most common domains of bias were selection and comparability. Numerous genes and genetic changes have been associated with childhood glaucoma. Understanding the most common genes as well as potential genotype-phenotype correlation has the potential to improve diagnostic and prognostic outcomes for children with glaucoma.
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Affiliation(s)
- Anika Kumar
- Department of Ophthalmology, University of California San Francisco, San Francisco, California, United States of America
| | - Ying Han
- Department of Ophthalmology, University of California San Francisco, San Francisco, California, United States of America
| | - Julius T. Oatts
- Department of Ophthalmology, University of California San Francisco, San Francisco, California, United States of America
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Rong S, Yu X, Wiggs JL. Genetic Basis of Pigment Dispersion Syndrome and Pigmentary Glaucoma: An Update and Functional Insights. Genes (Basel) 2024; 15:142. [PMID: 38397132 PMCID: PMC10887877 DOI: 10.3390/genes15020142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/16/2024] [Accepted: 01/18/2024] [Indexed: 02/25/2024] Open
Abstract
Pigment Dispersion Syndrome (PDS) and Pigmentary Glaucoma (PG) comprise a spectrum of ocular disorders characterized by iris pigment dispersion and trabecular meshwork changes, resulting in increased intraocular pressure and potential glaucomatous optic neuropathy. This review summarizes recent progress in PDS/PG genetics including rare pathogenic protein coding alterations (PMEL) and susceptibility loci identified from genome-wide association studies (GSAP and GRM5/TYR). Areas for future research are also identified, especially the development of efficient model systems. While substantial strides have been made in understanding the genetics of PDS/PG, our review identifies key gaps and outlines the future directions necessary for further advancing this important field of ocular genetics.
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Affiliation(s)
- Shisong Rong
- Ocular Genomics Institute, Department of Ophthalmology, Massachusetts Eye and Ear, Mass General Brigham, Harvard Medical School, Boston, MA 02114, USA;
| | - Xinting Yu
- Department of Medicine, Brigham and Women’s Hospital, Mass General Brigham, Harvard Medical School, Boston, MA 02115, USA;
| | - Janey L. Wiggs
- Ocular Genomics Institute, Department of Ophthalmology, Massachusetts Eye and Ear, Mass General Brigham, Harvard Medical School, Boston, MA 02114, USA;
- Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
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Tirendi S, Domenicotti C, Bassi AM, Vernazza S. Genetics and Glaucoma: the state of the art. Front Med (Lausanne) 2023; 10:1289952. [PMID: 38152303 PMCID: PMC10751926 DOI: 10.3389/fmed.2023.1289952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 11/28/2023] [Indexed: 12/29/2023] Open
Abstract
Glaucoma is the second leading cause of irreversible blindness worldwide. Although genetic background contributes differently to rare early-onset glaucoma (before age 40) or common adult-onset glaucoma, it is now considered an important factor in all major forms of the disease. Genetic and genomic studies, including GWAS, are contributing to identifying novel loci associated with glaucoma or to endophenotypes across ancestries to enrich the knowledge about glaucoma genetic susceptibility. Moreover, new high-throughput functional genomics contributes to defining the relevance of genetic results in the biological pathways and processes involved in glaucoma pathogenesis. Such studies are expected to advance significantly our understanding of glaucoma's genetic basis and provide new druggable targets to treat glaucoma. This review gives an overview of the role of genetics in the pathogenesis or risk of glaucoma.
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Affiliation(s)
- Sara Tirendi
- Department of Experimental Medicine, University of Genoa, Genoa, Italy
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), Genoa, Italy
| | - Cinzia Domenicotti
- Department of Experimental Medicine, University of Genoa, Genoa, Italy
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), Genoa, Italy
| | - Anna Maria Bassi
- Department of Experimental Medicine, University of Genoa, Genoa, Italy
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), Genoa, Italy
| | - Stefania Vernazza
- Department of Experimental Medicine, University of Genoa, Genoa, Italy
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), Genoa, Italy
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Kuang L, Zhang M, Wang T, Huang T, Li J, Gan R, Yu M, Cao W, Yan X. The molecular genetics of anterior segment dysgenesis. Exp Eye Res 2023; 234:109603. [PMID: 37495069 DOI: 10.1016/j.exer.2023.109603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 07/19/2023] [Accepted: 07/22/2023] [Indexed: 07/28/2023]
Abstract
Anterior segment dysgenesis is a severe developmental eye disorder that leads to blindness in children. The exact mechanisms underlying this condition remain elusive. Recently, an increasing amount of studies have focused on genes and signal transduction pathways that affect anterior segment dysgenesis;these factors include transcription factors, developmental regulators, extracellular matrix genes, membrane-related proteins, cytoskeleton proteins and other associated genes. To date, dozens of gene variants have been found to cause anterior segment dysgenesis. However, there is still a lack of effective treatments. With a broader and deeper understanding of the molecular mechanisms underlying anterior segment development in the future, gene editing technology and stem cell technology may be new treatments for anterior segment dysgenesis. Further studies on the mechanisms of how different genes influence the onset and progression of anterior segment dysgenesis are still needed.
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Affiliation(s)
- Longhao Kuang
- Shenzhen Eye Hospital, Jinan University, Shenzhen Eye Institute, Shenzhen, 518040, China
| | - Min Zhang
- School of Medicine, Anhui University of Science and Technology, Huainan, 232000, China
| | - Ting Wang
- Shenzhen Eye Hospital, Jinan University, Shenzhen Eye Institute, Shenzhen, 518040, China
| | - Tao Huang
- Shenzhen Eye Hospital, Jinan University, Shenzhen Eye Institute, Shenzhen, 518040, China
| | - Jin Li
- Shenzhen Eye Hospital, Jinan University, Shenzhen Eye Institute, Shenzhen, 518040, China
| | - Run Gan
- Shenzhen Eye Hospital, Jinan University, Shenzhen Eye Institute, Shenzhen, 518040, China
| | - Mingyu Yu
- Department of the Second Clinical Medical College, Jinan University (Shenzhen Eye Hospital), Shenzhen, 518020, China
| | - Wenchao Cao
- Department of the Second Clinical Medical College, Jinan University (Shenzhen Eye Hospital), Shenzhen, 518020, China
| | - Xiaohe Yan
- Shenzhen Eye Hospital, Jinan University, Shenzhen Eye Institute, Shenzhen, 518040, China.
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Monavarfeshani A, Yan W, Pappas C, Odenigbo KA, He Z, Segrè AV, van Zyl T, Hageman GS, Sanes JR. Transcriptomic Analysis of the Ocular Posterior Segment Completes a Cell Atlas of the Human Eye. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.04.26.538447. [PMID: 37162855 PMCID: PMC10168356 DOI: 10.1101/2023.04.26.538447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Although the visual system extends through the brain, most vision loss originates from defects in the eye. Its central element is the neural retina, which senses light, processes visual signals, and transmits them to the rest of the brain through the optic nerve (ON). Surrounding the retina are numerous other structures, conventionally divided into anterior and posterior segments. Here we used high-throughput single nucleus RNA sequencing (snRNA-seq) to classify and characterize cells in the extraretinal components of the posterior segment: ON, optic nerve head (ONH), peripheral sclera, peripapillary sclera (PPS), choroid, and retinal pigment epithelium (RPE). Defects in each of these tissues are associated with blinding diseases - for example, glaucoma (ONH and PPS), optic neuritis (ON), retinitis pigmentosa (RPE), and age-related macular degeneration (RPE and choroid). From ∼151,000 single nuclei, we identified 37 transcriptomically distinct cell types, including multiple types of astrocytes, oligodendrocytes, fibroblasts, and vascular endothelial cells. Our analyses revealed a differential distribution of many cell types among distinct structures. Together with our previous analyses of the anterior segment and retina, the new data complete a "Version 1" cell atlas of the human eye. We used this atlas to map the expression of >180 genes associated with the risk of developing glaucoma, which is known to involve ocular tissues in both anterior and posterior segments as well as neural retina. Similar methods can be used to investigate numerous additional ocular diseases, many of which are currently untreatable.
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Affiliation(s)
- Aboozar Monavarfeshani
- Center for Brain Science and Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138
- F.M. Kirby Neurobiology Center, Boston Children’s Hospital, Boston, MA, USA
- Equal contributions
| | - Wenjun Yan
- Center for Brain Science and Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138
- Equal contributions
| | - Christian Pappas
- Sharon Eccles Steele Center for Translational Medicine, John A. Moran Eye Center, Department of Ophthalmology & Visual Sciences, University of Utah School of Medicine, Salt Lake City, UT, 84132, USA
| | - Kenechukwu A. Odenigbo
- Center for Brain Science and Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138
| | - Zhigang He
- F.M. Kirby Neurobiology Center, Boston Children’s Hospital, Boston, MA, USA
| | - Ayellet V. Segrè
- Department of Ophthalmology, Harvard Medical School and Massachusetts Eye and Ear, Boston, MA 02114
- Broad Institute of Harvard and MIT, Cambridge, MA
| | - Tavé van Zyl
- Center for Brain Science and Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138
- Department of Ophthalmology, Harvard Medical School and Massachusetts Eye and Ear, Boston, MA 02114
- Present address: Department of Ophthalmology and Visual Science, Yale School of Medicine, New Haven, CT 06510
| | - Gregory S. Hageman
- Sharon Eccles Steele Center for Translational Medicine, John A. Moran Eye Center, Department of Ophthalmology & Visual Sciences, University of Utah School of Medicine, Salt Lake City, UT, 84132, USA
| | - Joshua R. Sanes
- Center for Brain Science and Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138
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Tan J, Zeng L, Wang Y, Liu G, Huang L, Chen D, Wang X, Fan N, He Y, Liu X. Compound Heterozygous Variants of the CPAMD8 Gene Co-Segregating in Two Chinese Pedigrees With Pigment Dispersion Syndrome/Pigmentary Glaucoma. Front Genet 2022; 13:845081. [PMID: 35957697 PMCID: PMC9358689 DOI: 10.3389/fgene.2022.845081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 06/20/2022] [Indexed: 11/13/2022] Open
Abstract
The molecular mechanisms underlying the pathogenesis of pigment dispersion syndrome and pigmentary glaucoma remain unclear. In pedigree-based studies, familial aggregation and recurrences in relatives suggest a strong genetic basis for pigmentary glaucoma. In this study, we aimed to identify the genetic background of two Chinese pedigrees with pigmentary glaucoma. All members of these two pedigrees who enrolled in the study underwent a comprehensive ophthalmologic examination, and genomic DNA was extracted from peripheral venous blood samples. Whole-exome sequencing and candidate gene verifications were performed to identify the disease-causing variants; in addition, screening of the CPAMD8 gene was performed on 38 patients of sporadic pigmentary glaucoma. Changes in the structure and function of abnormal proteins caused by gene variants were analyzed with a bioinformatics assessment. Pigmentary glaucoma was identified in a total of five patients from the two pedigrees, as were compound heterozygous variants of the CPAMD8 gene. No signs of pigmentary glaucoma were found in carriers of monoallelic CPAMD8 variant/variants. All four variants were inherited in an autosomal recessive mode. In addition to the 38 patients of sporadic pigmentary glaucoma, 13 variants of the CPAMD8 gene were identified in 11 patients. This study reported a possible association between CPAMD8 variants and pigment dispersion syndrome/pigmentary glaucoma.
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Affiliation(s)
- Junkai Tan
- Xiamen Eye Center, Xiamen University, Xiamen, China
| | - Liuzhi Zeng
- Department of Ophthalmology, Chengdu First People’s Hospital, Chengdu, China
| | - Yun Wang
- Shenzhen Eye Hospital, Shenzhen Eye Institute, Jinan University, Shenzhen, China
| | - Guo Liu
- Sichuan Provincial Key Laboratory for Human Disease Gene Study, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Longxiang Huang
- Department of Ophthalmology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Defu Chen
- School of Ophthalmology and Optometry, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Xizhen Wang
- Shenzhen Eye Hospital, Shenzhen Eye Institute, Jinan University, Shenzhen, China
| | - Ning Fan
- Shenzhen Eye Hospital, Shenzhen Eye Institute, Jinan University, Shenzhen, China
| | - Yu He
- Department of Ophthalmology, Chengdu First People’s Hospital, Chengdu, China
| | - Xuyang Liu
- Xiamen Eye Center, Xiamen University, Xiamen, China
- Department of Ophthalmology, Shenzhen People’s Hospital, The 2nd Clinical Medical College, Jinan University, Shenzhen, China
- *Correspondence: Xuyang Liu,
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Chen TH, Chen ZX, Zhang M, Chen JH, Lan LN, Jiang Y. Biometric and Structural Ocular Manifestations of Anterior Megalophthalmos. Front Med (Lausanne) 2022; 9:732452. [PMID: 35665341 PMCID: PMC9160329 DOI: 10.3389/fmed.2022.732452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 02/17/2022] [Indexed: 11/25/2022] Open
Abstract
Objective The aim of this study was to examine the biometric ocular manifestations and structural ocular features of anterior megalophthalmos (AM). Methods Fifteen patients with AM (30 eyes) from the Eye & ENT Hospital of Fudan University were included. The age-matched control group consisted of 30 participants (30 eyes) who underwent Pentacam HR and IOLMaster 700 measurements for one normal eye. Data on demographics, biometric manifestations, and genotypes were carefully compared. Results A total of 15 patients with AM and 30 control patients were enrolled. There were no differences in age (37.27 ± 19.1 vs. 31.43 ± 19.69 years, P = 0.249) between these two groups. AM eyes were characterized by premature cataracts (11/30, 36.67%) and zonular weakness with lens subluxation (22/30, 73.33%) compared with the control group. Notably, 20 of the 30 AM eyes (66.67%) had significant posterior iris bowing, and 16 of the 30 AM eyes (53.33%) showed an enlarged ciliary ring on ultrasound biomicroscopy (UBM). Mean corneal curvature was lower in the AM eyes (42.01 ± 2.06 D vs. 43.14 ± 1.38 D, P = 0.023). There was no significant difference in corneal pachymetry and central endothelial cell count between the AM and control groups. Significant differences were found in terms of the anterior chamber and white-to-white (WTW) among the Pentacam HR and IOLMaster 700 in patients with AM (P < 0.05). The difference was 0.53 ± 0.48 mm and 0.36 ± 0.14 mm, respectively (P < 0.001). Conclusion The results of this cohort study conclude the biometric and structural ocular manifestations in Chinese cohorts. Posterior iris bowing (66.67%) and lens subluxation (73.33%) are the most characteristic findings in patients with AM with anatomical abnormalities of megalocornea and a deep anterior chamber, although corneal biometric manifestations of AM included flatter cornea and lower total corneal astigmatism. The knowledge of ocular manifestations of AM is important for diagnosis and preparation for the operation in advance to avoid intraoperative and postoperative complications. Significant differences were found in the anterior chamber and WTW values between the Pentacam HR and IOLMaster 700. Thus, we suggest that various examinations should be carefully considered before determining an AM diagnosis.
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Affiliation(s)
- Tian-Hui Chen
- Department of Ophthalmology and Vision Science, Eye & ENT Hospital of Fudan University, Shanghai, China
- Key Laboratory of Myopia of State Health Ministry, Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Ze-Xu Chen
- Department of Ophthalmology and Vision Science, Eye & ENT Hospital of Fudan University, Shanghai, China
- Key Laboratory of Myopia of State Health Ministry, Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Min Zhang
- Department of Ophthalmology and Vision Science, Eye & ENT Hospital of Fudan University, Shanghai, China
- Key Laboratory of Myopia of State Health Ministry, Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Jia-Hui Chen
- Department of Ophthalmology and Vision Science, Eye & ENT Hospital of Fudan University, Shanghai, China
- Key Laboratory of Myopia of State Health Ministry, Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Li-Na Lan
- Department of Ophthalmology and Vision Science, Eye & ENT Hospital of Fudan University, Shanghai, China
- Key Laboratory of Myopia of State Health Ministry, Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Yongxiang Jiang
- Department of Ophthalmology and Vision Science, Eye & ENT Hospital of Fudan University, Shanghai, China
- Key Laboratory of Myopia of State Health Ministry, Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, China
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
- *Correspondence: Yongxiang Jiang,
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Liu Z, Hu C, Tang D, Luo G. miR-129 Promotes the Proliferation of Alzheimer’s Neuronal Cells by Binding the 3′ Untranslated Regions (3′ UTR) of Amyloid Precursor Protein (APP). J BIOMATER TISS ENG 2022. [DOI: 10.1166/jbt.2022.2923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Alzheimer’s disease (AD) is a neurodegenerative disease with memory loss and cognitive impairment. Short non-coding RNAs (miRNAs) are potential biomarkers and therapeutic targets for AD. This study aims to investigate miR-129’s role in AD. miR-129 and amyloid precursor protein
(APP) expression was measured by Q-PCR, and LC3, p62, ATG5, Bcl-2, p-Tau and Caspase3 protein was detected by Western blot. Hydrogenase kits and DCFH-DA detected cell apoptosis, cytotoxicity and ROS generation. The interaction between APP and miR-129 was assessed by luciferase report experiment.
HE staining and TUNEL assay evaluated hippocampal neuron damage. In AD patient serum, AD transgenic (TG) mouse brain tissue, and AB1-42-treated SH-SY5Y cells, miR-129 was downregulated but autophagy was increased. Overexpression of miR-129 reduced cell damage induced by AB1-42, and miR-129
can directly regulate APP expression by binding APP 3′-UTR. miR-129 inhibitors reversed the protective effect of shAPP on AB1-42-induced cell damage. In addition, miR-129 overexpression reduced neuronal damage through inhibiting autophagy in vivo. APP expression in AD patient
and AD cell model was significantly increased compared to controls. Aβ-42 treatment caused up-regulation of APP expression, while APP knockdown inhibited neurons through autophagy. In conclusion, miR-129 overexpression can regulate autophagy by targeting APP5, thereby reducing
neuronal damage in AD. These findings provide a new perspective for treating AD.
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Affiliation(s)
- Zhen Liu
- Department of Neurology, Jinshan Branch of Shanghai Sixth People’s Hospital, Shanghai, 201500, China
| | - Canfang Hu
- Department of Neurology, Jinshan Branch of Shanghai Sixth People’s Hospital, Shanghai, 201500, China
| | - Dingzhong Tang
- Department of Neurology, Jinshan Branch of Shanghai Sixth People’s Hospital, Shanghai, 201500, China
| | - Guojun Luo
- Department of Neurology, Jinshan Branch of Shanghai Sixth People’s Hospital, Shanghai, 201500, China
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