更新于：2024-11-01

Spastic Paraplegia-50, Autosomal Recessive

50型常染色体隐性遗传性痉挛性截瘫

更新于：2024-11-01

基本信息

别名

CEREBRAL PALSY, SPASTIC QUADRIPLEGIC, 3, FORMERLY、CPSQ3, FORMERLY、Cerebral Palsy, Spastic Quadriplegic 3, Formerly

+ [5]

简介

An autosomal recessive subtype of hereditary spastic paraplegia caused by mutation(s) in the AP4M1 gene, encoding AP-4 complex subunit mu-1.

关联

项与 50型常染色体隐性遗传性痉挛性截瘫相关的药物

Melpida

靶点

AP4M1

作用机制

AP4M1刺激剂

在研机构

Elpida Therapeutics [+1]

原研机构

CureSPG50

在研适应症

50型常染色体隐性遗传性痉挛性截瘫

非在研适应症-

最高研发阶段临床1/2期

首次获批国家/地区-

首次获批日期1800-01-20

项与 50型常染色体隐性遗传性痉挛性截瘫相关的临床试验

NCT05518188 / Recruiting临床1/2期

A Phase 1/2 Open-label Intrathecal Administration of MELPIDA to Determine Its Safety and Efficacy for Patients with Spastic Paraplegia Type 50 (SPG50) Caused by Mutation in the AP4M1 Gene.

MELPIDA is proposed for the treatment of subjects with SPG50 and targets neuronal cells to deliver a fully functional human AP4M1 cDNA copy via intrathecal injection to counter the associated neuronal loss. Outcomes will evaluate the safety and tolerability of a single dose of MELPIDA, which will be measured by the treatment-associated adverse events (AEs) and serious adverse events (SAEs). Secondarily, the trial will explore efficacy in terms of disease burden assessments.

开始日期2023-02-15

申办/合作机构

Elpida Therapeutics

[+1]

NCT04712812 / RecruitingN/AIIT

Registry and Natural History Study for Early Onset Hereditary Spastic Paraplegia (HSP)

The Registry and Natural History Study for Early Onset Hereditary Spastic Paraplegia (HSP) is focused on gathering longitudinal clinical data as well as biological samples (skin and/or blood and/or saliva) from male and female patients, under the age of 30, who exhibited early onset symptoms of HSP with (1) a clinical diagnosis of hereditary spastic paraplegia and (2) the presence of variants in HSP related genes and/or be a relative of a person with such a diagnosis. Currently, the treatment for this disorder is generally symptomatic and available therapies improve quality of life, but are grossly inefficient in slowing the disease progression. Access to the registry information will be limited to the study staff who are responsible for recruitment and maintenance of the registry. We hope that recruitment into the registry for studies will advance knowledge of the causes, clinical course, diagnosis, and treatment of these conditions.

开始日期2020-04-27

申办/合作机构

The Children's Hospital Corp.

100 项与 50型常染色体隐性遗传性痉挛性截瘫相关的临床结果

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100 项与 50型常染色体隐性遗传性痉挛性截瘫相关的转化医学

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0 项与 50型常染色体隐性遗传性痉挛性截瘫相关的专利（医药）

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项与 50型常染色体隐性遗传性痉挛性截瘫相关的文献（医药）

2023-05-15·The Journal of clinical investigation

Intrathecal AAV9/AP4M1 gene therapy for hereditary spastic paraplegia 50 shows safety and efficacy in preclinical studies.

Article

作者: Ebrahimi-Fakhari, Darius ; Ziegler, Marvin ; Bonifacino, Juan S ; Eberhardt, Kathrin ; Pirovolakis, Terry ; Chen, Xin ; Mattera, Rafael ; Hu, Yuhui ; Sahin, Mustafa ; De Pace, Raffaella ; Gray, Steven J ; Dong, Thomas

Spastic paraplegia 50 (SPG50) is an ultrarare childhood-onset neurological disorder caused by biallelic loss-of-function variants in the AP4M1 gene. SPG50 is characterized by progressive spastic paraplegia, global developmental delay, and subsequent intellectual disability, secondary microcephaly, and epilepsy. We preformed preclinical studies evaluating an adeno-associated virus (AAV)/AP4M1 gene therapy for SPG50 and describe in vitro studies that demonstrate transduction of patient-derived fibroblasts with AAV2/AP4M1, resulting in phenotypic rescue. To evaluate efficacy in vivo, Ap4m1-KO mice were intrathecally (i.t.) injected with 5 × 1011, 2.5 × 1011, or 1.25 × 1011 vector genome (vg) doses of AAV9/AP4M1 at P7-P10 or P90. Age- and dose-dependent effects were observed, with early intervention and higher doses achieving the best therapeutic benefits. In parallel, three toxicology studies in WT mice, rats, and nonhuman primates (NHPs) demonstrated that AAV9/AP4M1 had an acceptable safety profile up to a target human dose of 1 × 1015 vg. Of note, similar degrees of minimal-to-mild dorsal root ganglia (DRG) toxicity were observed in both rats and NHPs, supporting the use of rats to monitor DRG toxicity in future i.t. AAV studies. These preclinical results identify an acceptably safe and efficacious dose of i.t.-administered AAV9/AP4M1, supporting an investigational gene transfer clinical trial to treat SPG50.

2023-03-01·Clinical Genetics

Putative founder effect of Arg338* AP4M1 (SPG50) variant causing severe intellectual disability, epilepsy and spastic paraplegia: Report of three families

Article

作者: Felici, Charlotte ; Shariati, Gholamreza ; Seifi, Tahereh ; Ding, Can ; Abi‐Warde, Marie‐Thérèse ; Schaefer, Elise ; Zix, Christian ; de Saint Martin, Anne ; Bronner, Myriam ; Bonnet, Céline ; Azizimalamiri, Reza ; Pirson, Isabelle ; Zamani, Mina ; Jonveaux, Philippe ; Abramowicz, Marc ; Renaud, Mathilde ; Clément, Guillemette ; Sadeghian, Saeid ; Lefort, Geneviève ; Duerinckx, Sarah ; Galehdari, Hamid ; Leheup, Bruno ; Lambert, Laëtitia ; Becker, Aurélie ; Selig, Mareike ; Zeighami, Jawaher

AbstractBi‐allelic variants affecting one of the four genes encoding the AP4 subunits are responsible for the “AP4 deficiency syndrome.” Core features include hypotonia that progresses to hypertonia and spastic paraplegia, intellectual disability, postnatal microcephaly, epilepsy, and neuroimaging features. Namely, AP4M1 (SPG50) is involved in autosomal recessive spastic paraplegia 50 (MIM#612936). We report on three patients with core features from three unrelated consanguineous families originating from the Middle East. Exome sequencing identified the same homozygous nonsense variant: NM_004722.4(AP4M1):c.1012C>T p.Arg338* (rs146262009). So far, four patients from three other families carrying this homozygous variant have been reported worldwide. We describe their phenotype and compare it to the phenotype of patients with other variants in AP4M1. We construct a shared single‐nucleotide polymorphism (SNP) haplotype around AP4M1 in four families and suggest a probable founder effect of Arg338* AP4M1 variant with a common ancestor most likely of Turkish origin.

2021-12-01·Neurological Sciences4区 · 医学

A novel loss of function mutation in adaptor protein complex 4, subunit mu-1 causing autosomal recessive spastic paraplegia 50

4区 · 医学

Article

作者: Muthusamy, Babylakshmi ; Bellad, Anikha ; Girimaji, Satish Chandra

BACKGROUNDSpastic paraplegia 50 (SPG50) is a rare autosomal recessive inherited disorder characterized by spasticity, severe intellectual disability and delayed or absent speech. Loss-of-function pathogenic mutations in the AP4M1 gene cause SPG50.METHODSIn this study, we investigated the clinical and genetic characteristics of a consanguineous family with two male siblings who had infantile hypotonia that progressed to spasticity, paraplegia in one and quadriplegia in the other patient. In addition, the patients also exhibited neurodevelopmental phenotypes including severe intellectual disability, developmental delay, microcephaly and dysmorphism.RESULTSIn order to identify the genetic cause, we performed cytogenetics, whole-exome sequencing and Sanger sequencing. Whole-exome sequencing of the affected siblings and unaffected parents revealed a novel exonic frameshift insertion of eight nucleotides (c.341_342insTGAAGTGC) on exon 4 of the AP4M1 gene.CONCLUSIONInsertion of these eight nucleotides in the AP4M1 gene is predicted to result in a premature protein product of 132 amino acids. The truncated protein product lacks a signal binding domain which is essential for protein-protein interactions and the transport of cargo proteins to the membrane. Thus, the identified variant is pathogenic and our study expands the knowledge of clinical and genetic features of SPG50.

项与 50型常染色体隐性遗传性痉挛性截瘫相关的新闻（医药）

2024-07-08

·派真生物PackGene

一周要闻丨基因治疗要闻速递第110期

行业动态速览热点聚焦 01 只有一个患者的临床试验！AAV基因治疗对抗无药可治的超罕见绝症痉挛性截瘫50型（spastic paraplegia type 50，SPG50）是一种超罕见的疾病，全球患儿数量只有约80人，而在加拿大仅有迈克尔一人被报道患有SPG50。SPG50患者会经历发育迟缓、言语功能障碍以及进行性的四肢瘫痪，通常活不到成年阶段。在2022年，迈克尔参与了以AAV为基础的SPG50基因疗法临床试验，同时他也是这项试验唯一的患者。这项1期临床试验的结果已经以“AAV gene therapy for hereditary spastic paraplegia type 50: a phase 1 trial in a single patient”为题，发表在《自然-医学》上，结果支持了基因疗法拯救迈克尔计划的初步成功。推荐阅读：只有一个患者的临床试验！对抗无药可治的超罕见绝症，7岁的他迎来治愈曙光 02 利用mRNA瞬时构建TCR-T细胞，治疗晚期难治性高MSI结直肠癌患者！结直肠癌（CRC）是全球第三大常见癌症，尽管局部性 CRC 生存率高，但转移性CRC的5年生存率仅约为11%。近期，挪威奥斯陆大学医学院研究团队报道了在患有 LS 和晚期转移性 MSI-H CRC 的患者中，首次使用 mRNA 电穿孔进行瞬时表达 Radium-1 TCR 在临床患者中应用，相关文章以简报形式，发表在Cell ASGCT系列杂志《Molecular Therapy》上。推荐阅读：利用mRNA瞬时构建TCR-T细胞，治疗晚期难治性高MSI结直肠癌患者！ 03超70%患者达主要终点！潜在“first-in-class"CAR-T疗法积极临床结果公布近日，Cartesian Therapeutics宣布了其在研mRNA细胞疗法Descartes-08在全身性重症肌无力（MG）患者中的2b期临床试验的积极顶线结果。推荐阅读：超70%患者达主要终点！潜在“first-in-class"CAR-T疗法积极临床结果公布 04 CDE公开征求意见！规范腺相关病毒载体基因治疗产品非临床研究近日，中国国家药品监督管理局（NMPA）药品审评中心（CDE）发布了《腺相关病毒载体基因治疗产品非临床研究技术指导原则（征求意见稿）》，旨在规范并促进腺相关病毒（AAV）载体基因治疗产品的非临床研究，为该类产品的临床试验和上市提供科学依据。推荐阅读：CDE公开征求意见！规范腺相关病毒载体基因治疗产品非临床研究创新突破 01 AAV递送工程，最新Science！美国怀特海德生物医学研究所Jonathan S. Weissman和MIT/哈佛大学Sonia M. Vallabh等人开发了一种名为CHARM的紧凑表观基因组编辑器，单个AAV就能实现对其的有效递送。在小鼠实验中，CHARM可以敲低全脑中80%以上的朊病毒基因，同时不会改变潜在的DNA序列。该编辑器可以在沉默靶标后实现自我沉默，从而限制长期表达的潜在不利影响。CHARM代表了一种治疗模式，可应用于由有害蛋白质的毒性积聚引起的一系列其他疾病。因此，CHARM最终可能对人类产生类似于碱基编辑、先导编辑等工具的巨大影响。推荐阅读：AAV递送工程，最新Science！ 02 减毒病毒疗法助力癌症治疗！近日，一篇发表在国际杂志Journal of Clinical Investigation上题为“An attenuated lymphocytic choriomeningitis virus vector enhances tumor control in mice partly via IFN-I”的研究报告中，来自美国西北大学等机构的科学家们通过研究发现，一种减毒的淋巴细胞性脑膜脊髓炎病毒（LCMV）能够有效清除小鼠体内的肿瘤，并使幸存小鼠对后续肿瘤发展具备更强抵抗力。研究结果揭示了特殊LCMV载体的强大抗肿瘤效应，并揭示了其抗肿瘤疗效背后的多种分子机制，为癌症治疗提供了新思路。推荐阅读：减毒病毒疗法助力癌症治疗！ 03 苏州儿童医院团队鉴定新的神经母细胞瘤超级增强子近日，苏州大学附属儿童医院潘健和张子木团队在 Neuro-Oncology 上发表题为 Super-enhancer-driven IRF2BP2 enhances ALK activity and promotes neuroblastoma cell proliferation 的文章，鉴定出一个由NB主转录因子簇MYCN, MEIS2和HAND2 调节激活的新SE区域，导致靶基因IRF2BP2的异常高表达。IRF2BP2能够与该NB主转录因子簇之间形成正反馈回路，从而在NB中建立稳定持续的高水平IRF2BP2的表达。此外，IRF2BP2还能够与先驱因子AP-1家族成员通过调节NB易感基因ALK的染色质可及性，维持NB细胞增殖与存活。这项研究为NB生物学提供了新的见解，并有可能为NB下调ALK提供替代策略。推荐阅读：苏州儿童医院团队鉴定新的神经母细胞瘤超级增强子资本速递 01 14.5亿欧元！GSK与mRNA巨头达成协议 7月4日，葛兰素史克(LSE/NYSE: GSK) 与 CureVac N.V. (Nasdaq: CVAC)宣布，两家公司已将现有合作重组为一项新的授权协议，使双方能优先投资及专注各自的mRNA开发活动。根据协议条款，CureVac将获得4亿欧元的预付款，以及至多10.5亿欧元的开发、监管和销售里程碑以及分层版税，累计近15亿欧元（117.68亿人民币，以最新汇率计算）的款项。根据新的协议条款，GSK将全面负责以上候选疫苗的开发和生产。GSK将拥有全球商业化候选疫苗的权利。推荐阅读：14.5亿欧元！GSK与mRNA巨头达成协议 02 1.7亿美元B轮融资！创新基因疗法注册性试验已启动近日，眼科基因治疗公司Beacon Therapeutics宣布已完成1.7亿美元的 B轮融资。该融资由Forbion领投，TCGX和Advent Life Sciences参与，现有投资者Syncona Limited、Oxford Science Enterprises、牛津大学也参与其中。这些资金将用以支持Beacon用于治疗X连锁视网膜色素变性（XLRP）的主打在研基因疗法AGTC-501的持续临床开发，并支持该公司的干性老年性黄斑变性（dAMD）项目的1/2期临床试验。推荐阅读：1.7亿美元B轮融资！创新基因疗法注册性试验已启动 03 Cartesian LNP-mRNA细胞疗法临床成功，新获融资1.3亿美金！近日，Cartesian Therapeutics宣布签订了一份证券购买协议，用于私人投资公开股权（“PIPE”）融资，预计将为公司带来大约1.30亿美元的总收益。推荐阅读：Cartesian LNP-mRNA细胞疗法临床成功，新获融资1.3亿美金！参考资料： 1.https://mp.weixin.qq.com/s/pbFanDicHXsfZAAXnHZW7Q 2.https://mp.weixin.qq.com/s/GkEznBO7lvdlTThW362Erg 3.https://mp.weixin.qq.com/s/b-q0nD0P1VgnX7wlv8URnA 4.https://finance.sina.com.cn/stock/med/2024-07-07/doc-incchkam5612250.shtml 5.https://mp.weixin.qq.com/s/TO5oI7Nw1cz1tu5WkVFgbw 6.https://mp.weixin.qq.com/s/1lMb-HSL-sia6Aho0qUKCw 7.https://mp.weixin.qq.com/s/7z3SMvOeAFlrZYfdXw3kPw 8.https://mp.weixin.qq.com/s/gT_omNuemkJLTux5e6Bhjw 9.https://mp.weixin.qq.com/s/sfYhDx1ZdkS4RWdPF_oiBw 10.https://mp.weixin.qq.com/s/T9swMSo3FHpn7wrWK1xHWg 关于派真生物

细胞疗法基因疗法信使RNA免疫疗法临床1期