Raras
Buscar doenças, sintomas, genes...
MERRF
ORPHA:551CID-10 · G71.3CID-11 · 8C73.YOMIM 545000DOENÇA RARA

Distúrbio raro de fosforilação oxidativa mitocondrial caracterizado por convulsões mioclônicas, ataxia, epilepsia generalizada, fraqueza muscular e fibras vermelhas irregulares na biópsia muscular.

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Introdução

O que você precisa saber de cara

📋

Distúrbio raro de fosforilação oxidativa mitocondrial caracterizado por convulsões mioclônicas, ataxia, epilepsia generalizada, fraqueza muscular e fibras vermelhas irregulares na biópsia muscular.

Pesquisas ativas
1 ensaio
6 total registrados no ClinicalTrials.gov
Publicações científicas
572 artigos
Último publicado: 2026 Apr 1

Escala de raridade

CLASSIFICAÇÃO ORPHANET · BRASIL 2024
Unknown
Ultra-rara
<1/50k
Muito rara
1/20k
Rara
1/10k
Pouco freq.
1/5k
Incomum
1/2k
Prevalência
0.0
Europe
Início
Adult
+ childhood
🏥
SUS: Cobertura mínimaScore: 15%
CID-10: G71.3
🇧🇷Dados SUS / DATASUS
PROCEDIMENTOS SIGTAP (2)
0202010694
Sequenciamento completo do exoma (WES)genetic_test
0301070040
Atendimento em reabilitação — doenças rarasrehabilitation
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Sinais e sintomas

O que aparece no corpo e com que frequência cada sintoma acontece

Partes do corpo afetadas

🧠
Neurológico
5 sintomas
💪
Músculos
4 sintomas
😀
Face
1 sintomas
👂
Ouvidos
1 sintomas
👁️
Olhos
1 sintomas
🦴
Ossos e articulações
1 sintomas

+ 5 sintomas em outras categorias

Características mais comuns

90%prev.
Miopatia
Muito frequente (99-80%)
90%prev.
Fibras musculares vermelhas rasgadas
Muito frequente (99-80%)
90%prev.
Deficiência auditiva neurossensorial
Muito frequente (99-80%)
90%prev.
Ataxia
Muito frequente (99-80%)
90%prev.
Anormalidade do movimento
Muito frequente (99-80%)
90%prev.
Crise mioclônica generalizada
Muito frequente (99-80%)
18sintomas
Muito frequente (7)
Frequente (4)
Sem dados (7)

Os sintomas variam de pessoa para pessoa. Abaixo estão as 18 características clínicas mais associadas, ordenadas por frequência.

MiopatiaMyopathy
Muito frequente (99-80%)90%
Fibras musculares vermelhas rasgadasRagged-red muscle fibers
Muito frequente (99-80%)90%
Deficiência auditiva neurossensorialSensorineural hearing impairment
Muito frequente (99-80%)90%
Ataxia
Muito frequente (99-80%)90%
Anormalidade do movimentoAbnormality of movement
Muito frequente (99-80%)90%

Linha do tempo da pesquisa

Publicações por ano — veja quando o interesse científico cresceu
Anos de pesquisa1desde 2026
Total histórico572PubMed
Últimos 10 anos169publicações
Pico201833 papers
Linha do tempo
2026Hoje · 2026🧪 2009Primeiro ensaio clínico📈 2018Ano de pico
Publicações por ano (últimos 10 anos)

Encontrou um erro ou informação desatualizada? Sugira uma correção →

Genética e causas

O que está alterado no DNA e como passa nas famílias

Genes associados

11 genes identificados com associação a esta condição. Padrão de herança: Mitochondrial inheritance.

MT-TS2Candidate gene tested inDesconhecido
LOCALIZAÇÃO

VIAS BIOLÓGICAS (3)
G alpha (i) signalling eventsFormyl peptide receptors bind formyl peptides and many other ligandsG alpha (q) signalling events
OUTRAS DOENÇAS (4)
mitochondrial diseaseMERRF syndromeUsher syndrome type 3MELAS syndrome
HGNC:7498
MT-TPDisease-causing germline mutation(s) inDesconhecido
LOCALIZAÇÃO

VIAS BIOLÓGICAS (3)
G alpha (i) signalling eventsFormyl peptide receptors bind formyl peptides and many other ligandsG alpha (q) signalling events
OUTRAS DOENÇAS (2)
mitochondrial diseaseMERRF syndrome
HGNC:7494
MT-TS1Disease-causing germline mutation(s) inDesconhecido
LOCALIZAÇÃO

VIAS BIOLÓGICAS (3)
G alpha (i) signalling eventsFormyl peptide receptors bind formyl peptides and many other ligandsG alpha (q) signalling events
OUTRAS DOENÇAS (6)
mitochondrial diseaseMERRF syndromepalmoplantar keratoderma-deafness syndromematernally-inherited progressive external ophthalmoplegia
HGNC:7497
MT-ND5NADH-ubiquinone oxidoreductase chain 5Disease-causing germline mutation(s) inDesconhecido
FUNÇÃO

Core subunit of the mitochondrial membrane respiratory chain NADH dehydrogenase (Complex I) which catalyzes electron transfer from NADH through the respiratory chain, using ubiquinone as an electron acceptor (PubMed:15250827). Essential for the catalytic activity and assembly of complex I (PubMed:15250827)

LOCALIZAÇÃO

Mitochondrion inner membrane

VIAS BIOLÓGICAS (4)
Respiratory electron transportComplex I biogenesisMitochondrial translation terminationMitochondrial protein degradation
MECANISMO DE DOENÇA

Leber hereditary optic neuropathy

A maternally inherited form of Leber hereditary optic neuropathy, a mitochondrial disease resulting in bilateral painless loss of central vision due to selective degeneration of the retinal ganglion cells and their axons. The disorder shows incomplete penetrance and male predominance. Cardiac conduction defects and neurological defects have also been described in some LHON patients. LHON results from primary mitochondrial DNA mutations affecting the respiratory chain complexes.

OUTRAS DOENÇAS (5)
mitochondrial diseaseMELAS syndromematernally-inherited Leigh syndromeMERRF syndrome
HGNC:7461UniProt:P03915
MT-RNR1Mitochondrial-derived peptide MOTS-cCandidate gene tested inDesconhecido
FUNÇÃO

Regulates insulin sensitivity and metabolic homeostasis (PubMed:25738459, PubMed:33468709). Inhibits the folate cycle, thereby reducing de novo purine biosynthesis which leads to the accumulation of the de novo purine synthesis intermediate 5-aminoimidazole-4-carboxamide (AICAR) and the activation of the metabolic regulator 5'-AMP-activated protein kinase (AMPK) (PubMed:25738459). Protects against age-dependent and diet-induced insulin resistance as well as diet-induced obesity (PubMed:25738459)

LOCALIZAÇÃO

SecretedMitochondrionNucleus

VIAS BIOLÓGICAS (3)
G alpha (i) signalling eventsFormyl peptide receptors bind formyl peptides and many other ligandsG alpha (q) signalling events
OUTRAS DOENÇAS (3)
mitochondrial diseaseMERRF syndromemitochondrial non-syndromic sensorineural hearing loss
HGNC:7470UniProt:A0A0C5B5G6
MT-TFDisease-causing germline mutation(s) inDesconhecido
LOCALIZAÇÃO

VIAS BIOLÓGICAS (2)
Post-translational protein phosphorylationRegulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs)
OUTRAS DOENÇAS (4)
mitochondrial diseaseMELAS syndromeGitelman-like kidney tubulopathy due to mitochondrial DNA mutationMERRF syndrome
HGNC:7481
MT-TKDisease-causing germline mutation(s) inDesconhecido
LOCALIZAÇÃO

VIAS BIOLÓGICAS (3)
G alpha (i) signalling eventsFormyl peptide receptors bind formyl peptides and many other ligandsG alpha (q) signalling events
OUTRAS DOENÇAS (4)
mitochondrial diseaseMERRF syndromematernally-inherited cardiomyopathy and hearing lossmaternally-inherited Leigh syndrome
HGNC:7489
MT-TQCandidate gene tested inDesconhecido
LOCALIZAÇÃO

VIAS BIOLÓGICAS (3)
G alpha (i) signalling eventsFormyl peptide receptors bind formyl peptides and many other ligandsG alpha (q) signalling events
OUTRAS DOENÇAS (2)
MELAS syndromeMERRF syndrome
HGNC:7495
MT-TL1Disease-causing germline mutation(s) inDesconhecido
LOCALIZAÇÃO

VIAS BIOLÓGICAS (3)
G alpha (i) signalling eventsFormyl peptide receptors bind formyl peptides and many other ligandsG alpha (q) signalling events
OUTRAS DOENÇAS (7)
mitochondrial diseasematernally-inherited Leigh syndromeMELAS syndromeMERRF syndrome
HGNC:7490
MT-THDisease-causing germline mutation(s) inDesconhecido
LOCALIZAÇÃO

VIAS BIOLÓGICAS (1)
Catecholamine biosynthesis
OUTRAS DOENÇAS (4)
mitochondrial diseaseMERRF syndromeMELAS syndromemitochondrial non-syndromic sensorineural hearing loss
HGNC:7487
MT-TIMENDELIANDesconhecido
LOCALIZAÇÃO

VIAS BIOLÓGICAS (3)
G alpha (i) signalling eventsFormyl peptide receptors bind formyl peptides and many other ligandsG alpha (q) signalling events
OUTRAS DOENÇAS (2)
mitochondrial diseaseGitelman-like kidney tubulopathy due to mitochondrial DNA mutation
HGNC:7488

Variantes genéticas (ClinVar)

54 variantes patogênicas registradas no ClinVar.

🧬 MT-TH: NC_012920.1:m.8478_13589del ()
🧬 MT-TH: NC_012920.1:m.8944_15057del ()
🧬 MT-TH: MTTH, 12148T-C ()
🧬 MT-TH: Single allele ()
🧬 MT-TH: NC_012920.1(MT-CYB):m.10950_15540del ()
Ver todas no ClinVar

Classificação de variantes (ClinVar)

Distribuição de 23 variantes classificadas pelo ClinVar.

12
7
4
Patogênica (52.2%)
VUS (30.4%)
Benigna (17.4%)
VARIANTES MAIS SIGNIFICATIVAS
MT-TR: NC_012920.1(MT-TR):m.10407G>A [Pathogenic]
MT-TS1: NC_012920.1(MT-TS1):m.7471dup [Pathogenic]
MT-ND5: NC_012920.1(MT-ND5):m.13042G>A [Likely pathogenic]
MT-TH: NC_012920.1(MT-TH):m.12147G>A [Likely pathogenic]
MT-TI: NC_012920.1(MT-TI):m.4300A>G [Likely pathogenic]

Vias biológicas (Reactome)

57 vias biológicas associadas aos genes desta condição.

Regulation of CDH11 Expression and Function Regulation of CDH11 gene transcription Intracellular oxygen transport Mitochondrial unfolded protein response (UPRmt) NADE modulates death signalling Activation of BIM and translocation to mitochondria Activation of caspases through apoptosome-mediated cleavage Ubiquinol biosynthesis Export of Viral Ribonucleoproteins from Nucleus NEP/NS2 Interacts with the Cellular Export Machinery Thromboxane signalling through TP receptor Signaling by WNT Translesion synthesis by REV1 Expression of BMAL (ARNTL), CLOCK, and NPAS2 Opsins Negative feedback regulation of MAPK pathway Negative regulation of MAPK pathway Energy dependent regulation of mTOR by LKB1-AMPK Defective SLC1A3 causes episodic ataxia 6 (EA6) Sensory perception of salty taste Mitochondrial translation termination Respiratory electron transport Complex I biogenesis Mitochondrial protein degradation Transcriptional regulation by RUNX2 NOTCH2 Activation and Transmission of Signal to the Nucleus Signaling by NOTCH2 Response of endothelial cells to shear stress Developmental Cell Lineages TP53 Regulates Transcription of Cell Death Genes SARS-CoV-2 Infection Downregulation of ERBB2 signaling Regulation of CDH1 Expression and Function Regulation of RUNX2 expression and activity Transcriptional regulation by RUNX3 TP53 Regulates Transcription of Caspase Activators and Caspases Defective homologous recombination repair (HRR) due to PALB2 loss of function Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA1 binding function NPAS4 regulates expression of target genes Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks WNT mediated activation of DVL ABC transporter disorders Defective ABCA3 causes SMDP3 Strand-asynchronous mitochondrial DNA replication Defective MUTYH substrate processing Defective Base Excision Repair Associated with NEIL1 Signaling by MET Virion Assembly and Release Virion Assembly and Release IKK complex recruitment mediated by RIP1 Transcriptional regulation by RUNX1 RAF activation Retrograde transport at the Trans-Golgi-Network Transcriptional regulation of pluripotent stem cells POU5F1 (OCT4), SOX2, NANOG repress genes related to differentiation POU5F1 (OCT4), SOX2, NANOG activate genes related to proliferation Formation of the canonical BAF (cBAF) complex

Diagnóstico

Os sinais que médicos procuram e os exames que confirmam

Carregando...

Tratamento e manejo

Remédios, cuidados de apoio e o que precisa acompanhar

Pipeline de tratamentos
Pipeline regulatório — de medicamentos já aprovados a drogas em pesquisa exploratória.
2Fase 21
·Pré-clínico1
Medicamentos catalogadosEnsaios clínicos· 0 medicamentos · 2 ensaios
Carregando informações de tratamento...

Onde tratar no SUS

Hospitais de referência no Brasil e o protocolo oficial do SUS (PCDT)

🇧🇷 Atendimento SUS — MERRF

🗺️

Selecione um estado ou use sua localização para ver resultados.

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

🟢 Recrutando agora

1 pesquisa recrutando participantes. Converse com seu médico sobre a possibilidade de participar.

Outros ensaios clínicos

6 ensaios clínicos encontrados, 1 ativos.

Distribuição por fase
Ver todos no ClinicalTrials.gov
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Publicações mais relevantes

📖Melhor nível de evidência: Revisão
Timeline de publicações
146 papers (10 anos)
#1

Progressive Myoclonic Epilepsies - A Pragmatic Review.

Neurology India2026 Mar 01

Progressive Myoclonus Epilepsy (PME) is a rare and complex group of inherited neurodegenerative disorders characterized by progressively worsening myoclonus, cognitive impairment, tonic-clonic seizures and ataxia. The clinical features and genetic underpinnings of PME are diverse, with approximately 80% of individuals now able to receive a molecular diagnosis. This review outlines the clinical phenotypes, genotypes, and management strategies for PME. Literature search for publications on PME in the preceding 20 years, with emphasis for the past one decade, performed using Medline, JSTOR (journal storage) and PubMed databases. In PME progression of symptoms can vary widely among patients, with some experiencing rapid deterioration while others may have a slower rate of decline. Lafora Disease, characterized by the presence of Lafora bodies in tissues, Unverricht-Lundborg Disease (EPM1), caused by mutations in the CSTB gene, Myoclonic Epilepsy with Ragged-Red Fibers (MERRF), a mitochondrial disorder and Neuronal Ceroid Lipofuscinoses (NCL) make up the major chunk of PME syndromes. In the workup of PME, certain clinical and electroencephalogram (EEG) findings can help differentiate the specific etiologies. Valproic acid, perampanel, phenobarbitone and zonisamide are frequently prescribed as a treatment for various seizure types associated with PME. They are effective for managing both myoclonic and generalized tonic-clonic seizures. However, patients often have a progressive course and may find their myoclonus resistant to treatment. This review explores the clinical features and genetic factors associated with the more prevalent as well as recently described forms of PME for effective clinical evaluation, and suggests management strategies for this challenging condition.

#2

EEG, clinical, and MRI features of status epilepticus associated with mitochondrial diseases.

Journal of neurology2026 Feb 23

This study aimed to identify specific EEG features of status epilepticus (SE) in patients with mitochondrial diseases and correlate them with clinical and neuroimaging findings. Clinical, EEG, and brain MRI data from adult patients with mitochondrial-related SE treated at Pitié-Salpêtrière hospital between 2010 and 2021 were reviewed. Thirteen patients were included, with MELAS (n = 5), POLG (n = 3), MERRF (n = 2), COQ8A (n = 2), and MT-ND1 variant (n = 1). One patient had two distinct SE episodes, totaling 14 episodes. Three main EEG patterns were identified: Type 1 (rhythmic sequences with definite evolution, n = 6), Type 2 (Lateralized Periodic Discharges with plus-modifiers (LPDs-plus) and clinical ictal manifestations, n = 12), and Type 3 (LPD-plus evolving into rhythmic activities, n = 11). MRI findings revealed FLAIR hyperintensities indicative of stroke-like lesions in 12 patients (onset: 4-28 days). In three cases, initial MRI was normal, with delayed hyperintensities (5-35 days). In 11/12 cases, stroke-like lesions were confirmed using perfusion or ASL. The localization of these lesions corresponded to electroclinical presentation of SE in most cases. In two patients, the spatial distribution of FLAIR hyperintensities did not align with EEG findings. Evolution of EEG patterns was seen during SE in 12 out of 14 episodes: Type 1 to Type 2 (n = 3), Type 2 to Type 3 (n = 6), and Type 1 to Type 2, then Type 3 (n = 3). SE is a severe complication of mitochondrial diseases. Three main EEG patterns were identified across episodes. Correlation with MRI suggests two mechanisms: (i) neuronal dysfunction generate rhythmic SE patterns that subsequently induce stroke-like lesions, due to increased local energy demands, and (ii) in more severe cases, acute bioenergetic failure and stroke-like lesions may directly trigger a specific EEG pattern, prolonging SE duration.

#3

Mitochondrial tRNA-Derived Diseases.

International journal of molecular sciences2025 Dec 13

Mitochondrial tRNA genes are critical hotspots for pathogenic mutations and several mitochondrial diseases. They account for approximately 70-75% of disease-causing mtDNA variants despite comprising only 5-10% of the mitochondrial genome. These mutations interfere with mitochondrial translation and affect oxidative phosphorylation, resulting in remarkably heterogeneous multisystem disorders. Under this light, we systematically reviewed PubMed, Scopus, and MITOMAP databases through October 2025, indexing all clinically relevant pathogenic mt-tRNA mutations classified by affected organ systems and underlying molecular mechanisms. Approximately 500 distinct pathogenic variants were identified across all 22 mt-tRNA genes. Beyond typical syndromes like MELAS, MERRF, Leigh syndrome, and Kearns-Sayre syndrome that are linked to mt-tRNA mutations, they increasingly implicate cardiovascular diseases (cardiomyopathy, hypertension), neuromuscular disorders (myopathies, encephalopathies), sensory impairment (hearing loss, optic neuropathy), metabolic dysfunction (diabetes, polycystic ovary syndrome), renal disease, neuropsychiatric conditions, and cancer. Beyond sequence mutations, defects in post-transcriptional modification systems emerge as critical disease mechanisms affecting mt-tRNA function and stability. The mutations on tRNA genes described herein represent potential targets for emerging genome editing therapies, although several translational challenges remain. However, targeted correction of pathogenic mt-tRNA mutations holds transformative potential for precision intervention on mitochondrial diseases.

#4

Computational design of a high-precision mitochondrial DNA cytosine base editor.

Nature structural &amp; molecular biology2025 Dec

Bystander editing remains a major limitation of current base editors, hindering their precision and therapeutic potential. Here, we present a de novo protein design strategy that creates a structurally rigid interface between a DNA-binding TALE domain and a cytosine deaminase, forming a unified editing module termed TALE-oriented deaminase (TOD). Cryo-EM analysis of TOD-DNA complexes confirms that this precise spatial architecture tightly restricts the deaminase activity window, thereby minimizing unwanted deamination. To further enhance editing specificity, we develop a split version, termed DdCBE-TOD, which virtually eliminates off-target editing. As a proof of concept, we apply DdCBE-TOD to generate a mitochondrial disease mouse model and to correct a pathogenic mutation associated with MERRF syndrome in patient-derived cells, achieving single-nucleotide precision. This work introduces a generalizable and computationally guided approach for ultra-precise base editing, offering a promising platform for both mechanistic studies and therapeutic correction of single-nucleotide mutations.

#5

Disease registries and rare disorders: The virtuous example of mitochondrial medicine.

Experimental neurology2025 Feb

Primary mitochondrial disorders (PMDs) are an extraordinarily complex group of rare disorders caused by impairment of the mitochondrial electron transport chain, or respiratory chain. Studying genotype-phenotype relationships in PMDs is a complex task. The clinical variability is large even in individuals with the same genotype, and the statistical power is low in single-center studies because of their rarity. To better define the clinical phenotypes associated with PMDs, in the last 15 years a significant multicenter effort has led to nation-wide studies on large cohorts of patients. Many national registries of mitochondrial patients have been developed in recent years, and now there is a strong effort towards international (and even global) registries. This review will revise the notable advances obtained with such studies in recent years, and will discuss the actual developments and future perspectives.

Publicações recentes

Ver todas no PubMed

📚 EuropePMC173 artigos no totalmostrando 164

2026

Progressive Myoclonic Epilepsies - A Pragmatic Review.

Neurology India
2026

EEG, clinical, and MRI features of status epilepticus associated with mitochondrial diseases.

Journal of neurology
2025

Mitochondrial tRNA-Derived Diseases.

International journal of molecular sciences
2025

Sequential development of three syndromes in a patient with m.3243A>G mutation: a case report.

Frontiers of medicine
2025

Electronic cigarette use linked to poor sleep quality: a cross-sectional nationwide population-based study in Korea.

Sleep &amp; breathing = Schlaf &amp; Atmung
2025

Computational design of a high-precision mitochondrial DNA cytosine base editor.

Nature structural &amp; molecular biology
2025

Gut instinct: microbiome as a modifiable target in the management of neurologic symptoms in myoclonic epilepsy with ragged-red fibers (MERRF).

Annals of medicine and surgery (2012)
2025

Selective muscle MRI changes in a patient with a rare mitochondrial DNA variant causing myoclonic epilepsy with ragged red fibres.

Neuromuscular disorders : NMD
2025

Peptide-mimetics derived from leucyl-tRNA synthetase are potential agents for the therapy of mt-tRNA related diseases.

Frontiers in pharmacology
2025

Delineating the mechanisms of cerebellar degeneration in paediatric and adult primary mitochondrial disease.

Acta neuropathologica
2025

A Review of the Advances in the Medical Management of Epilepsy Associated With Myoclonic Epilepsy With Ragged-Red Fibers (MERRF) Syndrome.

Cureus
2025

In vitro modelling of the neuropathophysiological features of mitochondrial epilepsy.

Seizure
2025

Successful application of vagus nerve stimulation in super refractory status epilepticus associated with MERRF syndrome.

Epilepsy &amp; behavior reports
2025

Disease registries and rare disorders: The virtuous example of mitochondrial medicine.

Experimental neurology
2024

LNC-ing Genetics in Mitochondrial Disease.

Non-coding RNA
2024

[Clinical characteristics of children with MT-TK gene m.8344A>G variation].

Zhonghua er ke za zhi = Chinese journal of pediatrics
2024

Myoclonic Epilepsy With Ragged Red Fiber Cardiomyopathy: A Case Report and Brief Review of Literature.

Cureus
2024

Eye closure sensitivity as a novel EEG marker of MERRF.

Epilepsia open
2024

[Progressive myoclonic epilepsy: a retrospective study of newly-diagnosed adult patients from a single center].

Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical genetics
2023

Endocrine Challenges in Myoclonic Epilepsy With Ragged Red Fibers Syndrome: A Case Report.

Cureus
2023

Wide diagnostic and genotypic spectrum in patients with suspected mitochondrial disease.

Orphanet journal of rare diseases
2023

Identification of new variants in MTRNR1 and MTRNR2 genes using whole mitochondrial genome sequencing in a Taiwanese family with MERRF (myoclonic epilepsy with ragged-red fibers) syndrome.

Hearing research
2023

Mitochondrial impairment and synaptic dysfunction are associated with neurological defects in iPSCs-derived cortical neurons of MERRF patients.

Journal of biomedical science
2023

Restoration of mitochondrial function through activation of hypomodified tRNAs with pathogenic mutations associated with mitochondrial diseases.

Nucleic acids research
2023

Genetic aberration analysis of mitochondrial respiratory complex I implications in the development of neurological disorders and their clinical significance.

Ageing research reviews
2023

The Mitochondrial tRNASer(UCN) Gene: A Novel m.7484A>G Mutation Associated with Mitochondrial Encephalomyopathy and Literature Review.

Life (Basel, Switzerland)
2023

[Epilepsy syndromes associated with hearing loss].

Zhurnal nevrologii i psikhiatrii imeni S.S. Korsakova
2023

MERRF Mutation A8344G in a Four-Generation Family without Central Nervous System Involvement: Clinical and Molecular Characterization.

Journal of personalized medicine
2022

Young-Onset Dementia and Neurodegenerative Disorders of the Young With an Emphasis on Clinical Manifestations.

Cureus
2022

Mitochondrial Epilepsy, a Challenge for Neurologists.

International journal of molecular sciences
2022

Stroke-like Episodes in Inherited Neurometabolic Disorders.

Metabolites
2023

Mitochondrial Dysfunction in Polycystic Ovary Syndrome.

Reproductive sciences (Thousand Oaks, Calif.)
2022

Milder Phenotype of Homoplasmic Versus Heteroplasmic m.8344A>G Variant in the Same Family: A Case Report.

Cureus
2022

Rapamycin rescues mitochondrial dysfunction in cells carrying the m.8344A > G mutation in the mitochondrial tRNALys.

Molecular medicine (Cambridge, Mass.)
2022

A Novel MTTK Gene Variant m.8315A>C as a Cause of MERRF Syndrome.

Genes
2022

Low Prevalence of Cardiomyopathy in Patients with Mitochondrial Disease and Neurological Manifestations.

Journal of cardiovascular development and disease
2022

Personalized Medicine in Mitochondrial Health and Disease: Molecular Basis of Therapeutic Approaches Based on Nutritional Supplements and Their Analogs.

Molecules (Basel, Switzerland)
2022

Screening and prevalence of cardiac abnormalities on electro- and echocardiography in a large cohort of patients with mitochondrial disease.

Molecular genetics and metabolism
2022

Cerebello-thalamofrontal dysconnectivity in paroxysmal kinesigenic dyskinesia: A resting-state fMRI study.

Parkinsonism &amp; related disorders
2022

Mitochondrial Ataxias: Molecular Classification and Clinical Heterogeneity.

Neurology international
2022

Mitochondrial Neurodegeneration.

Cells
2021

Mitochondrial Medicine in the COVID-19 Era.

Journal of clinical medicine
2021

Vaccine-Induced Immune Thrombotic Thrombocytopenia: First Case Report in South Korea.

Journal of clinical neurology (Seoul, Korea)
2021

Diagnosing Myoclonic Epilepsy With Ragged-Red Fibers Syndrome Requires Documentation of a Causative Mutation.

A&amp;A practice
2021

Altered trigeminothalamic spontaneous low-frequency oscillations in migraine without aura: a resting-state fMRI study.

BMC neurology
2022

Myoclonic Epilepsy with Ragged-red Fibers with Intranuclear Inclusions.

Internal medicine (Tokyo, Japan)
2021

Work-up of MERRF and MELAS fatalities requires autopsy of the brain and revision of intra-vitam investigations.

Pathology international
2021

Mitochondrial Syndromes Revisited.

Journal of clinical medicine
2021

Lipomatosis and optic neuropathy clinches the diagnosis of myoclonic epilepsy with ragged red fibres (MERRF) syndrome.

BMJ case reports
2021

Leigh Syndrome as a Phenotype of Near-Homoplasmic m.8344 A>G Variant in Children.

Child neurology open
2021

[Usefulness of combined sequencing of the mitochondrial genome and a targeted panel of nuclear genes involved in mitochondrial diseases].

Annales de biologie clinique
2021

Perioperative Management of an Adult Patient With Myoclonic Epilepsy With Ragged Red Fibers Syndrome: A Case Report.

A&amp;A practice
2021

The molecular pathology of pathogenic mitochondrial tRNA variants.

FEBS letters
2020

Advances in mt-tRNA Mutation-Caused Mitochondrial Disease Modeling: Patients' Brain in a Dish.

Frontiers in genetics
2021

Ekbom Syndrome: Ataxia, Myoclonus, and Cervical Lipomas.

Annals of neurology
2021

Clinical features of mtDNA-related syndromes in adulthood.

Archives of biochemistry and biophysics
2020

Long-term outcomes of two patients with progressive myoclonic epilepsy treated with vagus nerve stimulation therapy.

Heliyon
2020

Diagnosing MERRF requires clinical and genetic evidence.

Polish journal of pathology : official journal of the Polish Society of Pathologists
2020

Photosensitive Epilepsy and Polycystic Ovary Syndrome as Manifestations of MERRF.

Case reports in neurological medicine
2020

[Mitochondrial encephalopathy, lactic acidosis and stroke-like episodes / myoclonus epilepsy with ragged-red fibers /Leigh overlap syndrome caused by mitochondrial DNA 8344A>G mutation].

Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences
2020

Moyamoya and progressive myoclonic epilepsy secondary to CLN6 bi-allelic mutations - A previously unreported association.

Epilepsy &amp; behavior reports
2020

Should we investigate mitochondrial disorders in progressive adult-onset undetermined ataxias?

Cerebellum &amp; ataxias
2020

Two autopsy cases of mitochondrial disease (MELAS and MERRF) with special reference to the histological and immunohistochemical findings of the pancreatic islets.

Pathology international
2020

Outcome of endoscopic lipoma resection in myoclonic epilepsy with ragged-red fibers syndrome may depend on the genotype.

Asian journal of surgery
2020

"Myo-neuropathy" is commonly associated with mitochondrial tRNALysine mutation.

Journal of neurology
2020

Ganglionopathies Associated with MERRF Syndrome: An Original Report.

Journal of neuromuscular diseases
2020

Giant subcutaneous lipomatosis in Myoclonic Epilepsy with Ragged Red Fibers syndrome: The first literature report of "laparoscopic" excision.

Asian journal of surgery
2020

Tumors masquerading as neurological diseases: A caution for clinicians in planning diagnosis and treatment.

Neurology India
2020

Clinical phenotype of mitochondrial diabetes due to rare mitochondrial DNA mutations.

Annales d'endocrinologie
2020

Teaching NeuroImages: Imaging phenotype of myoclonic epilepsy with ragged-red fibers.

Neurology
2020

Self-initiated lifestyle interventions lead to potential insight into an effective, alternative, non-surgical therapy for mitochondrial disease associated multiple symmetric lipomatosis.

Mitochondrion
2020

Breaking a single hydrogen bond in the mitochondrial tRNAPhe -PheRS complex leads to phenotypic pleiotropy of human disease.

The FEBS journal
2020

Phenotype and genotype determine the diagnosis of MERRF or MERRF plus.

European annals of otorhinolaryngology, head and neck diseases
2020

Parkin-mediated mitophagy and autophagy flux disruption in cellular models of MERRF syndrome.

Biochimica et biophysica acta. Molecular basis of disease
2020

Effects of sleep duration and weekend catch-up sleep on falling injury in adolescents: a population-based study.

Sleep medicine
2020

An update on clinical, pathological, diagnostic, and therapeutic perspectives of childhood leukodystrophies.

Expert review of neurotherapeutics
2020

A high prevalence of arterial hypertension in patients with mitochondrial diseases.

Journal of inherited metabolic disease
2019

The best evidence for progressive myoclonic epilepsy: A pathway to precision therapy.

Seizure
2019

Systematic review and meta-analysis of cardiac involvement in mitochondrial myopathy.

Neurology. Genetics
2019

Is the MT-TN variant m.5703G>A truly causative for myoclonic epilepsy with ragged red fibers syndrome plus?

Chinese medical journal
2019

Phenotypic Diversity of Myoclonus Epilepsy Associated with Ragged-red Fibers with an 8344A>G mtDNA Mutation.

Internal medicine (Tokyo, Japan)
2019

Lower urinary tract symptoms in male patients with stroke: A nationwide population-based study.

Archives of gerontology and geriatrics
2019

Evidence for laminar cortical necrosis as histological equivalent of a non-classical stroke-like lesion in an m.8344A>G carrier.

Neuropathology : official journal of the Japanese Society of Neuropathology
2019

Multiple mtDNA deletions due to mitochondrion toxicity of anti-hepadnaviral drugs: Comments to the letter from J. Finsterer.

Neuropathology : official journal of the Japanese Society of Neuropathology
2019

Pharmacotherapeutic management of epilepsy in MERRF syndrome.

Expert opinion on pharmacotherapy
2019

Effect of arousal on sympathetic overactivity in patients with obstructive sleep apnea.

Sleep medicine
2019

Autopsied case with MERRF/MELAS overlap syndrome accompanied by stroke-like episodes localized to the precentral gyrus.

Neuropathology : official journal of the Japanese Society of Neuropathology
2019

[Ultrastructural and clinical findings of mitochondrial encephalomyopathy:report of 27 cases].

Zhonghua bing li xue za zhi = Chinese journal of pathology
2019

Broadening the phenotype of m.5703G>A mutation in mitochondrial tRNAAsn gene from mitochondrial myopathy to myoclonic epilepsy with ragged red fibers syndrome.

Chinese medical journal
2019

Lipomatosis Incidence and Characteristics in an Italian Cohort of Mitochondrial Patients.

Frontiers in neurology
2019

Beneficiality of combined levetiracetam, clonazepam for myoclonus in MERRF requires further confirmation.

Chinese medical journal
2019

Pathophysiological characterization of MERRF patient-specific induced neurons generated by direct reprogramming.

Biochimica et biophysica acta. Molecular cell research
2018

Pathology of skeletal muscle fibers and small blood vessels in MERRF syndrome: an ultrastructural study.

Polish journal of pathology : official journal of the Polish Society of Pathologists
2018

Proximal Myopathy due to m.5835G>A Mutation in Mitochondrial MT-TY Gene.

Case reports in neurological medicine
2019

MERRF syndrome (Myoclonic Epilepsy with Ragged Red Fibres) presenting with cervicothoracic lipomatosis.

European annals of otorhinolaryngology, head and neck diseases
2019

Robotic radical prostatectomy in a patient with prostate cancer and MERRF syndrome, a rare mitochondrial disorder affecting muscle fibers.

Urology case reports
2018

Mitochondrial tRNA Glutamic Acid Variant 14709T>C Manifesting as Myoclonic Epilepsy with Ragged Red Fibers.

Chinese medical journal
2018

Antimyoclonic Effect of Levetiracetam and Clonazepam Combined Treatment on Myoclonic Epilepsy with Ragged-Red Fiber Syndrome with m.8344A>G Mutation.

Chinese medical journal
2018

[Isolated myopathy due to the m.8344A>G variant is not unusual and may turn into multisystem disease over time].

Revista de neurologia
2018

Overlapping Leigh Syndrome/Myoclonic Epilepsy With Ragged Red Fibres in an Adolescent Patient With a Mitochondrial DNA A8344G Mutation.

Frontiers in neurology
2018

RNA modification landscape of the human mitochondrial tRNALys regulates protein synthesis.

Nature communications
2018

Madelung lipomatosis presenting as a manifestation of myoclonic epilepsy with ragged red fibers (MERRF) syndrome.

JAAD case reports
2018

Mutation m.15923A>G in the MT-TT gene causes mild myopathy - case report of an adult-onset phenotype.

BMC neurology
2018

Recent Advances in Mitochondria-Targeted Gene Delivery.

Molecules (Basel, Switzerland)
2018

Inherited pathogenic mitochondrial DNA mutations and gastrointestinal stem cell populations.

The Journal of pathology
2020

The heart in m.3243A>G carriers.

Herz
2018

Clinical syndromes associated with mtDNA mutations: where we stand after 30 years.

Essays in biochemistry
2018

mitoTev-TALE: a monomeric DNA editing enzyme to reduce mutant mitochondrial DNA levels.

EMBO molecular medicine
2018

Falling After Starting Running in a Case of Myoclonus Epilepsy Associated with Ragged-red Fibers with a 8344A>G mtDNA Mutation.

Internal medicine (Tokyo, Japan)
2019

Retinal Neuronal Loss in Visually Asymptomatic Patients With Myoclonic Epilepsy With Ragged-Red Fibers.

Journal of neuro-ophthalmology : the official journal of the North American Neuro-Ophthalmology Society
2018

Generation of two isogenic human induced pluripotent stem cell lines from a 15 year-old female patient with MERRF syndrome and A8344G mutation of mitochondrial DNA.

Stem cell research
2018

A Novel Mutation of Mitochondrial T14709C Causes Myoclonic Epilepsy with Ragged Red Fibers Syndrome in a Chinese Patient.

Chinese medical journal
2018

The Bacterial Protein CNF1 as a Potential Therapeutic Strategy against Mitochondrial Diseases: A Pilot Study.

International journal of molecular sciences
2018

Small fibre neuropathy in mitochondrial diseases explored with sudoscan.

Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology
2018

CO2-sensitive tRNA modification associated with human mitochondrial disease.

Nature communications
2018

ATOH1/RFX1/RFX3 transcription factors facilitate the differentiation and characterisation of inner ear hair cell-like cells from patient-specific induced pluripotent stem cells harbouring A8344G mutation of mitochondrial DNA.

Cell death &amp; disease
2018

Involvement of the Spinal Cord in Mitochondrial Disorders.

Journal of neurosciences in rural practice
2018

A Klinefelter patient with an additional mitochondrial mutation: Implications for genotype-driven treatment and mitochondrial mutational load in different tissues and family members.

Parkinsonism &amp; related disorders
2018

[Isolated girdle weakness: expansion of the phenotypic spectrum of the MERRF 8344A>G mutation of mitochondrial DNA].

Revista de neurologia
2018

MERRF Classification: Implications for Diagnosis and Clinical Trials.

Pediatric neurology
2018

Syndromic Hearing Loss: A Brief Review of Common Presentations and Genetics.

Journal of pediatric genetics
2018

Promoter analysis and transcriptional regulation of human carbonic anhydrase VIII gene in a MERRF disease cell model.

Archives of biochemistry and biophysics
2018

Generation of an induced pluripotent stem cell (iPSC) line from a 40-year-old patient with the A8344G mutation of mitochondrial DNA and MERRF (myoclonic epilepsy with ragged red fibers) syndrome.

Stem cell research
2018

Outcome of epilepsy in patients with mitochondrial disorders: Phenotype genotype and magnetic resonance imaging correlations.

Clinical neurology and neurosurgery
2018

Preferences of AAA/AAG codon recognition by modified nucleosides, τm5s2U34 and t6A37 present in tRNALys.

Journal of biomolecular structure &amp; dynamics
2017

[Study of mitochondrial dysfunction using cytoplasmic hybrid].

Patologicheskaia fiziologiia i eksperimental'naia terapiia
2018

Subcortical grey matter changes in juvenile myoclonic epilepsy.

NeuroImage. Clinical
2018

Prevalence of Headache in Patients With Mitochondrial Disease: A Cross-Sectional Study.

Headache
2017

Molecular Diagnosis of Myoclonus Epilepsy Associated with Ragged-Red Fibers Syndrome in the Absence of Ragged Red Fibers.

Frontiers in neurology
2018

Migraine in mitochondrial disorders: Prevalence and characteristics.

Cephalalgia : an international journal of headache
2017

Management of epilepsy in MERRF syndrome.

Seizure
2017

Beyond cervical lipomas: myoclonus, gait disorder and multisystem involvement leading to mitochondrial disease.

BMJ case reports
2017

Mitochondrial Transfer from Wharton's Jelly Mesenchymal Stem Cell to MERRF Cybrid Reduces Oxidative Stress and Improves Mitochondrial Bioenergetics.

Oxidative medicine and cellular longevity
2017

[A8344G mitochondrial DNA mutation observed in two generations].

Orvosi hetilap
2017

Regional gray matter changes in shift workers: a voxel-based morphometry study.

Sleep medicine
2016

Generation of MERRF patient-derived induced pluripotent stem cell line iMERRF-C7.

Stem cell research
2016

Cysteine Supplementation May be Beneficial in a Subgroup of Mitochondrial Translation Deficiencies.

Journal of neuromuscular diseases
2016

[Genetic system for maintaining the mitochondrial human genome in yeast Yarrowia lipolytica].

Prikladnaia biokhimiia i mikrobiologiia
2016

[A case of cerebrotendinous xanthomatosis mimicking the clinical phenotype of mitochondrial disease with a novel frame-shift mutation (c. 43_44 delGG) in CYP27A1 gene exon 1].

Rinsho shinkeigaku = Clinical neurology
2016

Myoclonus epilepsy in mitochondrial disorders.

Epileptic disorders : international epilepsy journal with videotape
2016

Mitochondrial neuropathy: considerations on pathogenesis.

European journal of neurology
2016

Suicidal ideation and attempts in patients with stroke: a population-based study.

Journal of neurology
2016

Three families with 'de novo' m.3243A > G mutation.

BBA clinical
2016

Disruption of the human COQ5-containing protein complex is associated with diminished coenzyme Q10 levels under two different conditions of mitochondrial energy deficiency.

Biochimica et biophysica acta
2016

Phenotypic spectrum of the m.8344A>G mutation.

Journal of neurology
2017

Ophthalmological findings in 74 patients with mitochondrial disease.

Ophthalmic genetics
2016

Impaired ROS Scavenging System in Human Induced Pluripotent Stem Cells Generated from Patients with MERRF Syndrome.

Scientific reports
2016

The expanding phenotype of MELAS caused by the m.3291T > C mutation in the MT-TL1 gene.

Molecular genetics and metabolism reports
2016

Expanded phenotypic spectrum of the m.8344A>G "MERRF" mutation: data from the German mitoNET registry.

Journal of neurology
2016

[A case of MELAS associated with histochemical findings of muscles characteristic of MERRF].

Rinsho shinkeigaku = Clinical neurology
2016

Peripheral neuropathy is a common manifestation of mitochondrial diseases: a single-centre experience.

European journal of neurology
2016

Lactose-free diet inducing aseptic pancreatitis and myoclonic jerks in late-onset, putative MERRF syndrome.

Journal of neurology
2016

Short peptides from leucyl-tRNA synthetase rescue disease-causing mitochondrial tRNA point mutations.

Human molecular genetics
2015

[Myoclonus epilepsy with ragged-red fibers: a case report and literature review].

Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences
2015

Volumetric and shape analysis of hippocampal subfields in unilateral mesial temporal lobe epilepsy with hippocampal atrophy.

Epilepsy research
2015

MitoTALEN: A General Approach to Reduce Mutant mtDNA Loads and Restore Oxidative Phosphorylation Function in Mitochondrial Diseases.

Molecular therapy : the journal of the American Society of Gene Therapy
2015

A typical case of myoclonic epilepsy with ragged red fibers (MERRF) and the lessons learned.

Journal of postgraduate medicine
2015

Homozygous mutations in MFN2 cause multiple symmetric lipomatosis associated with neuropathy.

Human molecular genetics
2015

Oxidative stress in inherited mitochondrial diseases.

Free radical biology &amp; medicine
2015

Progressive Myoclonus Epilepsies.

Seminars in neurology
2015

Characteristic cardiac phenotypes are detected by cardiovascular magnetic resonance in patients with different clinical phenotypes and genotypes of mitochondrial myopathy.

Journal of cardiovascular magnetic resonance : official journal of the Society for Cardiovascular Magnetic Resonance
2015

Screening of mitochondrial mutations and insertion-deletion polymorphism in gestational diabetes mellitus in the Asian Indian population.

Saudi journal of biological sciences
2015

"Myo-cardiomyopathy" is commonly associated with the A8344G "MERRF" mutation.

Journal of neurology
2015

Clinical manifestation of mitochondrial diseases.

Developmental period medicine
Ver todos os 173 no EuropePMC

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Doenças relacionadas

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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.

  1. Progressive Myoclonic Epilepsies - A Pragmatic Review.
    Neurology India· 2026· PMID 41817056mais citado
  2. EEG, clinical, and MRI features of status epilepticus associated with mitochondrial diseases.
    Journal of neurology· 2026· PMID 41729327mais citado
  3. Mitochondrial tRNA-Derived Diseases.
    International journal of molecular sciences· 2025· PMID 41465450mais citado
  4. Computational design of a high-precision mitochondrial DNA cytosine base editor.
    Nature structural &amp; molecular biology· 2025· PMID 41249818mais citado
  5. Disease registries and rare disorders: The virtuous example of mitochondrial medicine.
    Experimental neurology· 2025· PMID 39603485mais citado
  6. MERRF/MELAS overlap syndrome mimicking paradoxical cerebral embolism due to patent foramen ovale.
    Neurol Sci· 2026· PMID 41917332recente
  7. Sequential development of three syndromes in a patient with m.3243A>G mutation: a case report.
    Front Med· 2025· PMID 41452399recente

Bases de dados e fontes oficiais

Identificadores e referências canônicas usadas para montar este verbete.

  1. ORPHA:551(Orphanet)
  2. OMIM OMIM:545000(OMIM)
  3. MONDO:0010790(MONDO)
  4. GARD:7144(GARD (NIH))
  5. Variantes catalogadas(ClinVar)
  6. Busca completa no PubMed(PubMed)
  7. Artigo Wikipedia(Wikipedia)
  8. Q1881388(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

MERRF
Compêndio · Raras BR

MERRF

ORPHA:551 · MONDO:0010790
Prevalência
Unknown
Herança
Mitochondrial inheritance
CID-10
G71.3 · Miopatia mitocondrial não classificada em outra parte
CID-11
Ensaios
1 ativos
Início
Adult, Childhood
Prevalência
0.0 (Europe)
MedGen
UMLS
C0162672
EuropePMC
Wikidata
Wikipedia
Papers 10a
DiscussaoAtiva

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