2020
Ethnic variability in newborn metabolic screening markers associated with false‐positive outcomes
Peng G, Tang Y, Gandotra N, Enns GM, Cowan TM, Zhao H, Scharfe C. Ethnic variability in newborn metabolic screening markers associated with false‐positive outcomes. Journal Of Inherited Metabolic Disease 2020, 43: 934-943. PMID: 32216101, PMCID: PMC7540352, DOI: 10.1002/jimd.12236.Peer-Reviewed Original ResearchMeSH KeywordsAcyl-CoA Dehydrogenase, Long-ChainAmino Acid Metabolism, Inborn ErrorsBiomarkersBrain Diseases, MetabolicCaliforniaCongenital Bone Marrow Failure SyndromesEthnicityFalse Positive ReactionsFemaleGestational AgeGlutaryl-CoA DehydrogenaseHumansInfant, NewbornLipid Metabolism, Inborn ErrorsMaleMitochondrial DiseasesMuscular DiseasesNeonatal ScreeningOrnithine Carbamoyltransferase Deficiency DiseaseTandem Mass SpectrometryConceptsMetabolic marker levelsOrnithine transcarbamylase deficiencyMethylmalonic acidemiaClinical variablesMarker levelsBlack infantsMetabolic markersBlood metabolic markersDiverse newborn populationGlutaric acidemia type 1False-positive screensLong-chain acyl-CoA dehydrogenase deficiencyEthnicity-related differencesNewborn screening programsFalse-positive casesInborn metabolic disordersAcyl-CoA dehydrogenase deficiencySingleton babiesGestational ageBirth weightScreening programMetabolic disordersNewborn populationInfluence of ethnicityMetabolic screening
2018
Elevated methylmalonic acidemia (MMA) screening markers in Hispanic and preterm newborns
Peng G, de Fontnouvelle CA, Enns GM, Cowan TM, Zhao H, Scharfe C. Elevated methylmalonic acidemia (MMA) screening markers in Hispanic and preterm newborns. Molecular Genetics And Metabolism 2018, 126: 39-42. PMID: 30448007, PMCID: PMC6361520, DOI: 10.1016/j.ymgme.2018.11.006.Peer-Reviewed Original ResearchConceptsMarker levelsBirth weightMethylmalonic acidemiaPreterm birthHispanic infantsBlack infantsLow birth weightPreterm birth rateFalse-positive casesPreterm newbornsGestational ageFalse-positive resultsHigh prevalenceDiagnostic proceduresInfantsNon-HispanicsBirth rateNewbornsPredictive covariatesAcidemiaCombining newborn metabolic and DNA analysis for second-tier testing of methylmalonic acidemia
Peng G, Shen P, Gandotra N, Le A, Fung E, Jelliffe-Pawlowski L, Davis RW, Enns GM, Zhao H, Cowan TM, Scharfe C. Combining newborn metabolic and DNA analysis for second-tier testing of methylmalonic acidemia. Genetics In Medicine 2018, 21: 896-903. PMID: 30209273, PMCID: PMC6416784, DOI: 10.1038/s41436-018-0272-5.Peer-Reviewed Original ResearchConceptsScreen-positive newbornsMethylmalonic acidemiaMMA patientsPathogenic variantsNewborn screeningNewborn metabolic screeningLikely pathogenic variantsSecond-tier testingFalse-positive casesInborn metabolic disordersMMA casesHealthy controlsHispanic ethnicityMetabolic disordersMetabolic screeningPatientsDiverse multiethnic populationsMultiethnic populationMolecular findingsBlood spotsUnknown significanceFalse-positive outcomesNBS programsClinical performanceScreening panel
2016
Acylcarnitine Profiles Reflect Metabolic Vulnerability for Necrotizing Enterocolitis in Newborns Born Premature
Sylvester KG, Kastenberg ZJ, Moss RL, Enns GM, Cowan TM, Shaw GM, Stevenson DK, Sinclair TJ, Scharfe C, Ryckman KK, Jelliffe-Pawlowski LL. Acylcarnitine Profiles Reflect Metabolic Vulnerability for Necrotizing Enterocolitis in Newborns Born Premature. The Journal Of Pediatrics 2016, 181: 80-85.e1. PMID: 27836286, PMCID: PMC5538349, DOI: 10.1016/j.jpeds.2016.10.019.Peer-Reviewed Original ResearchMeSH KeywordsBiomarkersCaliforniaCarnitineCohort StudiesConfidence IntervalsEnterocolitis, NecrotizingFemaleFollow-Up StudiesGestational AgeHumansIncidenceInfant, NewbornInfant, PrematureIntensive Care Units, NeonatalMaleMultivariate AnalysisNeonatal ScreeningOdds RatioReproducibility of ResultsRetrospective StudiesRisk AssessmentVulnerable PopulationsConceptsModel development cohortValidation cohortAcylcarnitine levelsAcylcarnitine profilesNeonatal intensive care unitAbnormal fatty acid metabolismRetrospective cohort studyTotal parenteral nutritionDevelopment of NECIntensive care unitRisk stratification modelNewborn screening resultsDisease prevention strategiesLog unit increaseFatty acid metabolismCohort studyNecrotizing enterocolitisParenteral nutritionPreterm birthCare unitDevelopment of diseaseBirth weightBiologic surrogatesFree carnitineNewborn screening
2014
Mitochondrial Disease Sequence Data Resource (MSeqDR): A global grass-roots consortium to facilitate deposition, curation, annotation, and integrated analysis of genomic data for the mitochondrial disease clinical and research communities
Falk M, Shen L, Gonzalez M, Leipzig J, Lott M, Stassen A, Diroma M, Navarro-Gomez D, Yeske P, Bai R, Boles R, Brilhante V, Ralph D, DaRe J, Shelton R, Terry S, Zhang Z, Copeland W, van Oven M, Prokisch H, Wallace D, Attimonelli M, Krotoski D, Zuchner S, Gai X, participants: M, Bale S, Bedoyan J, Behar D, Bonnen P, Brooks L, Calabrese C, Calvo S, Chinnery P, Christodoulou J, Church D, Clima R, Cohen B, Cotton R, de Coo I, Derbenevoa O, Dunnen J, Dimmock D, Enns G, Gasparre G, Goldstein A, Gonzalez I, Gwinn K, Hahn S, Haas R, Hakonarson H, Hirano M, Kerr D, Li D, Lvova M, Macrae F, Maglott D, McCormick E, Mitchell G, Mootha V, Okazaki Y, Pujol A, Parisi M, Perin J, Pierce E, Procaccio V, Rahman S, Reddi H, Rehm H, Riggs E, Rodenburg R, Rubinstein Y, Saneto R, Santorsola M, Scharfe C, Sheldon C, Shoubridge E, Simone D, Smeets B, Smeitink J, Stanley C, Suomalainen A, Tarnopolsky M, Thiffault I, Thorburn D, Van Hove J, Wolfe L, Wong L. Mitochondrial Disease Sequence Data Resource (MSeqDR): A global grass-roots consortium to facilitate deposition, curation, annotation, and integrated analysis of genomic data for the mitochondrial disease clinical and research communities. Molecular Genetics And Metabolism 2014, 114: 388-396. PMID: 25542617, PMCID: PMC4512182, DOI: 10.1016/j.ymgme.2014.11.016.Peer-Reviewed Original ResearchConceptsWeb portalData resourcesLocus-specific databasesAnnotation tracksData analysis needsResearch communityAnalysis toolsUnique identifier systemsCentral web portalMitochondrial diseaseCustom annotation tracksUser-friendly fashionData analysis toolsGenomic data analysisUser interrogationData of relevanceDataset curationData sharingData visualizationIdentifier systemVariant pathogenicity assessmentCentralized knowledgeAnalysis needsOntology toolsMSeqDR
2013
Rare variant detection using family-based sequencing analysis
Peng G, Fan Y, Palculict TB, Shen P, Ruteshouser EC, Chi AK, Davis RW, Huff V, Scharfe C, Wang W. Rare variant detection using family-based sequencing analysis. Proceedings Of The National Academy Of Sciences Of The United States Of America 2013, 110: 3985-3990. PMID: 23426633, PMCID: PMC3593912, DOI: 10.1073/pnas.1222158110.Peer-Reviewed Original Research
2011
High-quality DNA sequence capture of 524 disease candidate genes
Shen P, Wang W, Krishnakumar S, Palm C, Chi AK, Enns GM, Davis RW, Speed TP, Mindrinos MN, Scharfe C. High-quality DNA sequence capture of 524 disease candidate genes. Proceedings Of The National Academy Of Sciences Of The United States Of America 2011, 108: 6549-6554. PMID: 21467225, PMCID: PMC3080966, DOI: 10.1073/pnas.1018981108.Peer-Reviewed Original ResearchConceptsGenome informationCandidate genomic regionsCopy number differencesHigh GC contentPadlock probesMolecular diagnosticsSingle nucleotide changeExon-level resolutionDisease candidate genesMitochondrial genesGenomic regionsSequence captureOrnithine transcarbamylase deficiencyGC contentOTC geneCandidate genesDNA variantsExon captureGenomic DNANucleotide changesSample processingStructural variantsGenesSequence verificationDNA samples
2009
Mitochondrial DNA analysis by multiplex denaturing high-performance liquid chromatography and selective sequencing in pediatric patients with cardiomyopathy
Schrijver I, Pique LM, Traynis I, Scharfe C, Sehnert AJ. Mitochondrial DNA analysis by multiplex denaturing high-performance liquid chromatography and selective sequencing in pediatric patients with cardiomyopathy. Genetics In Medicine 2009, 11: 118-126. PMID: 19265752, DOI: 10.1097/gim.0b013e318190356b.Peer-Reviewed Original ResearchConceptsHereditary optic neuropathyPediatric patientsWorse clinical symptomsHigh-performance liquid chromatographyDNA testingLeber's hereditary optic neuropathyIndividual sequence changesMutation analysisNovel heteroplasmic mutationClinical diagnostic useIdiopathic cardiomyopathyRare causeClinical symptomsOptic neuropathyDefinitive diagnosisPediatric cardiomyopathyAdditional functional parametersMultisystemic diseaseCardiomyopathyPathogenic changesUncertain pathogenicityLiquid chromatographyPatientsRespiratory chain activityDiagnostic use
2001
Frequency of mitochondrial transfer RNA mutations and deletions in 225 patients presenting with respiratory chain deficiencies
Jaksch M, Kleinle S, Scharfe C, Klopstock T, Pongratz D, Müller-Höcker J, Gerbitz KD, Liechti-Gallati S, Lochmuller H, Horvath R. Frequency of mitochondrial transfer RNA mutations and deletions in 225 patients presenting with respiratory chain deficiencies. Journal Of Medical Genetics 2001, 38: 665. PMID: 11584044, PMCID: PMC1734743, DOI: 10.1136/jmg.38.10.665.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultChildChild, PreschoolDNA Mutational AnalysisElectron TransportFemaleGene FrequencyGenetic VariationGenotypeHumansInfantInfant, NewbornMaleMiddle AgedMitochondria, MuscleMitochondrial DiseasesMuscle, SkeletalMutationPhenotypePolymorphism, GeneticRNARNA, MitochondrialRNA, TransferSequence DeletionConceptsMitochondrial transfer RNA (mt-tRNA) mutationsAdult patientsRespiratory chain deficiencyDistinct neurological syndromesChain deficiencyNeonatal groupPediatric groupClinical symptomsNeurological syndromeIndex patientsPathogenic mitochondrial DNA mutationsPatientsPathogenic relevanceMitochondrial DNA mutationsSkeletal musclePathogenic mutationsMuscle DNARNA mutationsMitochondrial disordersG mutationSkeletal muscle DNADeficiencyDetection rateDNA mutationsRC deficiency
2000
The complete form of X-linked congenital stationary night blindness is caused by mutations in a gene encoding a leucine-rich repeat protein
Pusch C, Zeitz C, Brandau O, Pesch K, Achatz H, Feil S, Scharfe C, Maurer J, Jacobi F, Pinckers A, Andreasson S, Hardcastle A, Wissinger B, Berger W, Meindl A. The complete form of X-linked congenital stationary night blindness is caused by mutations in a gene encoding a leucine-rich repeat protein. Nature Genetics 2000, 26: 324-327. PMID: 11062472, DOI: 10.1038/81627.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid MotifsAmino Acid SequenceBrainChromosome MappingDNA Mutational AnalysisDNA, ComplementaryElectroretinographyEye ProteinsFemaleGene Expression ProfilingGenesGenetic HeterogeneityGenetic MarkersGlycosylphosphatidylinositolsHumansKidneyLeucineMaleModels, MolecularMolecular Sequence DataMultigene FamilyMuscle ProteinsMusclesNerve Tissue ProteinsNight BlindnessOrgan SpecificityPedigreeProtein ConformationProteoglycansRepetitive Sequences, Amino AcidRetinaReverse Transcriptase Polymerase Chain ReactionSequence DeletionSequence Homology, Amino AcidTestisX ChromosomeConceptsLeucine-rich repeatsLeucine-rich repeat proteinFuture functional analysisProtein-protein interactionsCell-cell contactProximal short armCongenital stationary night blindnessGenetic mappingNew genesX chromosome2Repeat proteinsExtracellular proteinsLinkage intervalFunctional analysisStationary night blindnessDifferent lociShort armCell adhesionAmino acidsGenesCSNB1 locusProteinDifferent mutationsLociMutation analysisA novel mutation in the thiamine responsive megaloblastic anaemia gene SLC19A2 in a patient with deficiency of respiratory chain complex I
Scharfe C, Hauschild M, Klopstock T, Janssen AJ, Heidemann PH, Meitinger T, Jaksch M. A novel mutation in the thiamine responsive megaloblastic anaemia gene SLC19A2 in a patient with deficiency of respiratory chain complex I. Journal Of Medical Genetics 2000, 37: 669. PMID: 10978358, PMCID: PMC1734685, DOI: 10.1136/jmg.37.9.669.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAnemia, MegaloblasticBase SequenceCarrier ProteinsConsanguinityDNADNA Mutational AnalysisElectron Transport Complex IFamily HealthFemaleHumansMaleMembrane Transport ProteinsMitochondria, MuscleMuscle, SkeletalMutationNADH, NADPH OxidoreductasesPedigreePoint MutationPyruvate Dehydrogenase ComplexPyruvate Dehydrogenase Complex Deficiency DiseaseThiamineConceptsComplex I activityEarly-onset autosomal recessive disorderHigh-dose thiamine supplementationBrain MRI lesionsThiamine-responsive megaloblastic anemiaAutosomal recessive disorderI activityMRI lesionsClinical featuresMegaloblastic anemiaSkin biopsiesThiamine supplementationThiamine deficiencyTypical triadSLC19A2 geneRetinal degenerationHigh dosesConsanguineous parentsShort statureMitochondrial energy productionMitochondrial abnormalitiesSevere deficiencyRecessive disorderRespiratory chain complex IChain complex I
1998
Diabetes Insipidus, Diabetes Mellitus, Optic Atrophy and Deafness (DIDMOAD) Caused by Mutations in a Novel Gene (Wolframin) Coding for a Predicted Transmembrane Protein
Strom T, Hörtnagel K, Hofmann S, Gekeler F, Scharfe C, Rabl W, Gerbitz K, Meitinger T. Diabetes Insipidus, Diabetes Mellitus, Optic Atrophy and Deafness (DIDMOAD) Caused by Mutations in a Novel Gene (Wolframin) Coding for a Predicted Transmembrane Protein. Human Molecular Genetics 1998, 7: 2021-2028. PMID: 9817917, DOI: 10.1093/hmg/7.13.2021.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAmino Acid SequenceAnimalsChildChromosomes, Human, Pair 4DNAExonsFamily HealthFemaleGenesGenetic MarkersHumansIntronsMaleMembrane ProteinsMiceMolecular Sequence DataMutationPedigreePhysical Chromosome MappingPolymorphism, Single-Stranded ConformationalSequence AlignmentSequence Analysis, DNASequence Homology, Amino AcidWolfram SyndromeConceptsOptic atrophyWolfram syndrome patientsJuvenile diabetes mellitusWolfram syndrome familiesAutosomal recessive disorderMitochondrial DNA deletionsDiabetes mellitusPeripheral neuropathyNeurological symptomsDiabetes insipidusPsychiatric illnessSyndrome patientsWolfram syndromeHeterozygous carriersRecessive disorderSyndrome familiesAffected individualsMellitusPatientsAtrophyInsipidusFunction mutationsDeafnessDNA deletionsTransmembrane protein