2019
A patient with homozygous nonsense variants in two Leigh syndrome disease genes: Distinguishing a dual diagnosis from a hypomorphic protein‐truncating variant
Lake N, Formosa L, Stroud D, Ryan M, Calvo S, Mootha V, Morar B, Procopis P, Christodoulou J, Compton A, Thorburn D. A patient with homozygous nonsense variants in two Leigh syndrome disease genes: Distinguishing a dual diagnosis from a hypomorphic protein‐truncating variant. Human Mutation 2019, 40: 893-898. PMID: 30981218, PMCID: PMC6661004, DOI: 10.1002/humu.23753.Peer-Reviewed Original ResearchConceptsProtein-truncating variantsCI assemblyC-terminusLeigh syndromeMutant proteinsKnockout cellsDisease genesUncharacterized variantsHypomorphic effectPathogenic variantsLeigh-like syndromeMitochondrial diseaseWhole-exome sequencingGenomic criteriaFunctional studiesAmino acidsGenesTIMMDC1Homozygous nonsense variantPatient's clinical phenotypeClinical phenotypeExome sequencingNonsense variantMedical GeneticsDual diagnosisLeigh syndrome caused by mutations in MTFMT is associated with a better prognosis
Hayhurst H, de Coo I, Piekutowska‐Abramczuk D, Alston C, Sharma S, Thompson K, Rius R, He L, Hopton S, Ploski R, Ciara E, Lake N, Compton A, Delatycki M, Verrips A, Bonnen P, Jones S, Morris A, Shakespeare D, Christodoulou J, Wesol‐Kucharska D, Rokicki D, Smeets H, Pronicka E, Thorburn D, Gorman G, McFarland R, Taylor R, Ng Y. Leigh syndrome caused by mutations in MTFMT is associated with a better prognosis. Annals Of Clinical And Translational Neurology 2019, 6: 515-524. PMID: 30911575, PMCID: PMC6414492, DOI: 10.1002/acn3.725.Peer-Reviewed Original ResearchConceptsPathogenic variantsLeigh syndromeSubcortical white matter abnormalitiesNew casesFrequent initial manifestationLast clinical reviewRetrospective cohort studyBasal ganglia changesWhite matter abnormalitiesRespiratory chain deficiencyBi-allelic pathogenic variantsMitochondrial methionyl-tRNA formyltransferaseMolecular genetic findingsMilder clinical phenotypeInitial manifestationBrainstem lesionsCohort studyMedian ageBetter prognosisChain deficiencyMotor symptomsClinical reviewDisease progressionMultiple respiratory chain deficiencyMuscle biopsy
2017
Biallelic Mutations in MRPS34 Lead to Instability of the Small Mitoribosomal Subunit and Leigh Syndrome
Lake N, Webb B, Stroud D, Richman T, Ruzzenente B, Compton A, Mountford H, Pulman J, Zangarelli C, Rio M, Boddaert N, Assouline Z, Sherpa M, Schadt E, Houten S, Byrnes J, McCormick E, Zolkipli-Cunningham Z, Haude K, Zhang Z, Retterer K, Bai R, Calvo S, Mootha V, Christodoulou J, Rötig A, Filipovska A, Cristian I, Falk M, Metodiev M, Thorburn D. Biallelic Mutations in MRPS34 Lead to Instability of the Small Mitoribosomal Subunit and Leigh Syndrome. American Journal Of Human Genetics 2017, 101: 239-254. PMID: 28777931, PMCID: PMC5544391, DOI: 10.1016/j.ajhg.2017.07.005.Peer-Reviewed Original ResearchConceptsSmall mitoribosomal subunitMitoribosomal subunitHuman oxidative phosphorylation (OXPHOS) systemMitochondrial protein translationOxidative phosphorylation systemMitochondrial translation defectQuantitative proteomic analysisSpecific cellular pathwaysLeigh syndromeLentiviral-mediated expressionMitoribosomal proteinsMitochondrial ribosomesOXPHOS subunitsMitochondrial translationOXPHOS defectsProtein translationMitochondrial DNATranslation defectsUnrelated familiesProteomic analysisPhosphorylation systemQuantitative proteomicsCellular pathwaysProtein subunitsSubunit proteins
2016
Whole Exome Sequencing Identifies the Genetic Basis of Late-Onset Leigh Syndrome in a Patient with MRI but Little Biochemical Evidence of a Mitochondrial Disorder
Nafisinia M, Guo Y, Dang X, Li J, Chen Y, Zhang J, Lake N, Gold W, Riley L, Thorburn D, Keating B, Xu X, Hakonarson H, Christodoulou J. Whole Exome Sequencing Identifies the Genetic Basis of Late-Onset Leigh Syndrome in a Patient with MRI but Little Biochemical Evidence of a Mitochondrial Disorder. JIMD Reports 2016, 32: 117-124. PMID: 27344648, PMCID: PMC5362551, DOI: 10.1007/8904_2016_541.Peer-Reviewed Original ResearchLeigh syndromeCompound heterozygous mutationsLate-onset Leigh syndromeWhole-exome sequencingWhole exome sequencing identifiesAmino acid substitution p.Putaminal abnormalitiesSpongiform lesionsCapillary proliferationMitochondrial respiratory chain functionLactate peakExome sequencing identifiesPatientsBrain tissuePatient muscleSyndromeBrain MRSHeterozygous mutationsExome sequencingPathogenic effectsProtein expressionRespiratory chain functionLaboratory evaluationSubstitution p.Significant reduction
2015
Leigh syndrome: One disorder, more than 75 monogenic causes
Lake N, Compton A, Rahman S, Thorburn D. Leigh syndrome: One disorder, more than 75 monogenic causes. Annals Of Neurology 2015, 79: 190-203. PMID: 26506407, DOI: 10.1002/ana.24551.Peer-Reviewed Original ResearchLeigh Syndrome
Lake N, Bird M, Isohanni P, Paetau A. Leigh Syndrome. Journal Of Neuropathology & Experimental Neurology 2015, 74: 482-492. PMID: 25978847, DOI: 10.1097/nen.0000000000000195.Peer-Reviewed Original ResearchConceptsLeigh syndromeAnimal modelsHypoxic-ischemic encephalopathyBilateral symmetrical lesionsCommon pediatric presentationMolecular mechanismsSevere ATP depletionNeuronal preservationPediatric presentationProgressive encephalopathySymmetrical lesionsBasal gangliaCapillary proliferationCerebrospinal fluidUnique pathologyPathogenic mechanismsLesion developmentPatient samplesReactive oxygen speciesGliosisHyperlacticacidemiaEncephalopathyATP depletionSyndromePathology