Distúrbio de movimento raro caracterizado por contrações musculares involuntárias, repetitivas e sustentadas ou posturas envolvendo uma ou mais partes do corpo.
Introdução
O que você precisa saber de cara
Distúrbio de movimento raro caracterizado por contrações musculares involuntárias, repetitivas e sustentadas ou posturas envolvendo uma ou mais partes do corpo.
Escala de raridade
<1/50kMuito rara
1/20kRara
1/10kPouco freq.
1/5kIncomum
1/2k
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Sinais e sintomas
O que aparece no corpo e com que frequência cada sintoma acontece
Partes do corpo afetadas
+ 14 sintomas em outras categorias
Características mais comuns
Os sintomas variam de pessoa para pessoa. Abaixo estão as 33 características clínicas mais associadas, ordenadas por frequência.
Linha do tempo da pesquisa
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Genética e causas
O que está alterado no DNA e como passa nas famílias
Genes associados
3 genes identificados com associação a esta condição. Padrão de herança: Autosomal dominant.
Required for the quantitative accumulation of H/ACA ribonucleoproteins (RNPs), including telomerase, probably through the stabilization of DKC1, from the time of its synthesis until its association with NOP10, NHP2, and NAF1 at the nascent H/ACA RNA
Cytoplasm, cytosolNucleus, nucleoplasm
Dystonia 35, childhood-onset
A form of dystonia, a disorder defined by the presence of sustained involuntary muscle contraction, often leading to abnormal postures. DYT35 is an autosomal recessive form characterized by the onset of a dystonic movement disorder in the first year of life.
Protein with chaperone functions important for the control of protein folding, processing, stability and localization as well as for the reduction of misfolded protein aggregates. Involved in the regulation of synaptic vesicle recycling, controls STON2 protein stability in collaboration with the COP9 signalosome complex (CSN). In the nucleus, may link the cytoskeleton with the nuclear envelope, this mechanism seems to be crucial for the control of nuclear polarity, cell movement and, specificall
Endoplasmic reticulum lumenNucleus membraneCell projection, growth coneCytoplasmic vesicle membraneCytoplasmic vesicle, secretory vesicleCytoplasmic vesicle, secretory vesicle, synaptic vesicleCytoplasm, cytoskeleton
Dystonia 1, torsion, autosomal dominant
A primary torsion dystonia, and the most common and severe form. Dystonia is defined by the presence of sustained involuntary muscle contractions, often leading to abnormal postures. Dystonia type 1 is characterized by involuntary, repetitive, sustained muscle contractions or postures involving one or more sites of the body, in the absence of other neurological symptoms. Typically, symptoms develop first in an arm or leg in middle to late childhood and progress in approximately 30% of patients to other body regions (generalized dystonia) within about five years. 'Torsion' refers to the twisting nature of body movements observed in DYT1, often affecting the trunk. Distribution and severity of symptoms vary widely between affected individuals, ranging from mild focal dystonia to severe generalized dystonia, even within families.
IFN-induced dsRNA-dependent serine/threonine-protein kinase that phosphorylates the alpha subunit of eukaryotic translation initiation factor 2 (EIF2S1/eIF-2-alpha) and plays a key role in the innate immune response to viral infection (PubMed:18835251, PubMed:19189853, PubMed:19507191, PubMed:21072047, PubMed:21123651, PubMed:22381929, PubMed:22948139, PubMed:23229543). Inhibits viral replication via the integrated stress response (ISR): EIF2S1/eIF-2-alpha phosphorylation in response to viral in
CytoplasmNucleusCytoplasm, perinuclear region
Leukoencephalopathy, developmental delay, and episodic neurologic regression syndrome
An autosomal dominant disorder characterized by global developmental delay apparent in early childhood, cognitive impairment, ataxia, poor or absent speech with dysarthria, hypotonia, hypertonia, extrapyramidal signs, tremor, and abnormal involuntary movements. Affected individuals also exhibit neurological regression in the setting of febrile illness or infection. Many patients have seizures. Brain imaging shows diffuse white matter abnormalities with poor myelination.
Variantes genéticas (ClinVar)
170 variantes patogênicas registradas no ClinVar.
Classificação de variantes (ClinVar)
Distribuição de 60 variantes classificadas pelo ClinVar.
Vias biológicas (Reactome)
8 vias biológicas associadas aos genes desta condição.
Diagnóstico
Os sinais que médicos procuram e os exames que confirmam
Tratamento e manejo
Remédios, cuidados de apoio e o que precisa acompanhar
Onde tratar no SUS
Hospitais de referência no Brasil e o protocolo oficial do SUS (PCDT)
🇧🇷 Atendimento SUS — Distonia generalizada dos membros de início precoce
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Dados de DATASUS/CNES, SBGM, ABNeuro e Ministério da Saúde. Sempre confirme a disponibilidade diretamente com o estabelecimento.
Pesquisa ativa
Ensaios clínicos abertos e novidades científicas recentes
Pesquisa e ensaios clínicos
Nenhum ensaio clínico registrado para esta condição.
Publicações mais relevantes
Atypical presentations of DYT1 dystonia with acute craniocervical onset.
DYT1 gene mutations lead to early-onset dystonia that begins with focal limb onset and spreads to other body regions within 5 years, with typical sparing of the oromandibular muscles. In the present study, we describe two patients with an unusual presentation of the disease.
Haploinsufficiency of KMT2B, Encoding the Lysine-Specific Histone Methyltransferase 2B, Results in Early-Onset Generalized Dystonia.
Early-onset generalized dystonia represents the severest form of dystonia, a hyperkinetic movement disorder defined by involuntary twisting postures. Although frequently transmitted as a single-gene trait, the molecular basis of dystonia remains largely obscure. By whole-exome sequencing a parent-offspring trio in an Austrian kindred affected by non-familial early-onset generalized dystonia, we identified a dominant de novo frameshift mutation, c.6406delC (p.Leu2136Serfs∗17), in KMT2B, encoding a lysine-specific methyltransferase involved in transcriptional regulation via post-translational modification of histones. Whole-exome-sequencing-based exploration of a further 30 German-Austrian individuals with early-onset generalized dystonia uncovered another three deleterious mutations in KMT2B-one de novo nonsense mutation (c.1633C>T [p.Arg545∗]), one de novo essential splice-site mutation (c.7050-2A>G [p.Phe2321Serfs∗93]), and one inherited nonsense mutation (c.2428C>T [p.Gln810∗]) co-segregating with dystonia in a three-generation kindred. Each of the four mutations was predicted to mediate a loss-of-function effect by introducing a premature termination codon. Suggestive of haploinsufficiency, we found significantly decreased total mRNA levels of KMT2B in mutant fibroblasts. The phenotype of individuals with KMT2B loss-of-function mutations was dominated by childhood lower-limb-onset generalized dystonia, and the family harboring c.2428C>T (p.Gln810∗) showed variable expressivity. In most cases, dystonic symptoms were accompanied by heterogeneous non-motor features. Independent support for pathogenicity of the mutations comes from the observation of high rates of dystonic presentations in KMT2B-involving microdeletion syndromes. Our findings thus establish generalized dystonia as the human phenotype associated with haploinsufficiency of KMT2B. Moreover, we provide evidence for a causative role of disordered histone modification, chromatin states, and transcriptional deregulation in dystonia pathogenesis.
Publicações recentes
Right ventricular function in pulmonary hypertension and obesity: a cross-sectional cohort study with survival follow-up.
mTOR pathway diseases: challenges and opportunities from bench to bedside and the mTOR node.
The wide phenotypic spectrum of thiamine metabolism dysfunction syndrome 5 and its treatment.
De-escalation to ticagrelor monotherapy versus 12 months of dual antiplatelet therapy in patients with and without acute coronary syndromes: a systematic review and individual patient-level meta-analysis of randomised trials.
Ophthalmological screening guidelines for individuals with Osteogenesis Imperfecta: a scoping review.
📚 EuropePMCmostrando 2
Associações
Organizações que acompanham esta doença — pra ter apoio e orientação
Ainda não temos associações cadastradas para Distonia generalizada dos membros de início precoce.
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Comunidades
Grupos ativos de quem convive com esta doença aqui no Raras
Ainda não existe comunidade no Raras para Distonia generalizada dos membros de início precoce
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Referências e fontes
Bases de dados externas citadas neste artigo
Publicações científicas
Artigos indexados no PubMed ligados a esta doença no grafo RarasNet — título, periódico e PMID direto da fonte, sem intermediação de IA.
- Atypical presentations of DYT1 dystonia with acute craniocervical onset.
- Haploinsufficiency of KMT2B, Encoding the Lysine-Specific Histone Methyltransferase 2B, Results in Early-Onset Generalized Dystonia.
- Right ventricular function in pulmonary hypertension and obesity: a cross-sectional cohort study with survival follow-up.
- mTOR pathway diseases: challenges and opportunities from bench to bedside and the mTOR node.
- The wide phenotypic spectrum of thiamine metabolism dysfunction syndrome 5 and its treatment.
- De-escalation to ticagrelor monotherapy versus 12 months of dual antiplatelet therapy in patients with and without acute coronary syndromes: a systematic review and individual patient-level meta-analysis of randomised trials.
- Ophthalmological screening guidelines for individuals with Osteogenesis Imperfecta: a scoping review.
Bases de dados e fontes oficiais
Identificadores e referências canônicas usadas para montar este verbete.
- ORPHA:256(Orphanet)
- OMIM OMIM:128100(OMIM)
- MONDO:0007492(MONDO)
- Distonia e Espasticidade(PCDT · Ministério da Saúde)
- GARD:2027(GARD (NIH))
- Variantes catalogadas(ClinVar)
- Busca completa no PubMed(PubMed)
- Q28065536(Wikidata)
Dados compilados pelo RarasNet a partir de fontes abertas (Orphanet, OMIM, MONDO, PubMed/EuropePMC, ClinicalTrials.gov, DATASUS, PCDT/MS). Este conteúdo é informativo e não substitui avaliação médica.
Conteúdo mantido por Agente Raras · Médicos e pesquisadores podem colaborar
