0000000000512390

AUTHOR

John H. Livingston

showing 3 related works from this author

Gain-of-function mutations in IFIH1 cause a spectrum of human disease phenotypes associated with upregulated type I interferon signaling.

2014

The type I interferon system is integral to human antiviral immunity. However, inappropriate stimulation or defective negative regulation of this system can lead to inflammatory disease. We sought to determine the molecular basis of genetically uncharacterized cases of the type I interferonopathy Aicardi-Goutières syndrome, and of other patients with undefined neurological and immunological phenotypes also demonstrating an upregulated type I interferon response. We found that heterozygous mutations in the cytosolic double-stranded RNA receptor gene IFIH1 (MDA5) cause a spectrum of neuro-immunological features consistently associated with an enhanced interferon state. Cellular and biochemica…

Models MolecularInterferon-Induced Helicase IFIH1Molecular Sequence DataHDE NEU PEDElectrophoretic Mobility Shift AssayBiologymedicine.disease_causeNervous System MalformationsReal-Time Polymerase Chain ReactionArticleDEAD-box RNA HelicasesImmune systemAutoimmune Diseases of the Nervous SystemDownregulation and upregulationAnalysis of Variance; Autoimmune Diseases of the Nervous System; Base Sequence; DEAD-box RNA Helicases; Electrophoretic Mobility Shift Assay; Exome; HEK293 Cells; Humans; Interferon Type I; Microsatellite Repeats; Molecular Sequence Data; Mutation; Nervous System Malformations; Real-Time Polymerase Chain Reaction; Sequence Analysis DNA; Signal Transduction; Spectrum Analysis; Models Molecular; Phenotype; GeneticsModelsInterferonGeneticsmedicineHumansExomeMutationAnalysis of VarianceBase SequenceSpectrum AnalysisMolecularRNAMDA5DNASequence Analysis DNAMolecular biology3. Good healthInterferon Tipo IHEK293 CellsPhenotypeInterferon Type IMutationCancer researchSignal transductionSequence AnalysisInterferon type Imedicine.drugMicrosatellite RepeatsSignal TransductionNature genetics
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Bi-allelic JAM2 Variants Lead to Early-Onset Recessive Primary Familial Brain Calcification

2020

International audience; Primary familial brain calcification (PFBC) is a rare neurodegenerative disorder characterized by a combination of neurological, psychiatric, and cognitive decline associated with calcium deposition on brain imaging. To date, mutations in five genes have been linked to PFBC. However, more than 50% of individuals affected by PFBC have no molecular diagnosis. We report four unrelated families presenting with initial learning difficulties and seizures and later psychiatric symptoms, cerebellar ataxia, extrapyramidal signs, and extensive calcifications on brain imaging. Through a combination of homozygosity mapping and exome sequencing, we mapped this phenotype to chromo…

0301 basic medicineMaleCerebellumPathology[SDV]Life Sciences [q-bio]recessive brain calcificationMice0302 clinical medicineCognitive declineAge of OnsetChildGenetics (clinical)Exome sequencingComputingMilieux_MISCELLANEOUSBrain Diseasesprimary familial brain calcificationMalalties neurodegenerativesBrainFahr diseaseCalcinosisOCLNNeurodegenerative DiseasesHuman brainMiddle AgedPedigree[SDV] Life Sciences [q-bio]medicine.anatomical_structureKnockout mouseFemalemedicine.symptomAdultmedicine.medical_specialtyAdolescentGenes RecessiveNeuropathologyBiologyCalcificacióCalcification03 medical and health sciencesBasal Ganglia DiseasesReportGeneticsmedicineAnimalsHumansAllelesSLC20A2Cerebellar ataxiaknock out mouse modelmedicine.diseaseJAM2030104 developmental biologyFahr disease; familial idiopathic basal ganglia calcification; JAM2; JAM3; knock out mouse model; MYORG; OCLN; primary familial brain calcification; recessive brain calcification; SLC20A2familial idiopathic basal ganglia calcificationJAM3MYORGXenotropic and Polytropic Retrovirus ReceptorCell Adhesion Molecules030217 neurology & neurosurgeryCalcification
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Mutations in CTC1, encoding conserved telomere maintenance component 1, cause Coats plus

2012

Coats plus is a highly pleiotropic disorder particularly affecting the eye, brain, bone and gastrointestinal tract. Here, we show that Coats plus results from mutations in CTC1, encoding conserved telomere maintenance component 1, a member of the mammalian homolog of the yeast heterotrimeric CST telomeric capping complex. Consistent with the observation of shortened telomeres in an Arabidopsis CTC1 mutant and the phenotypic overlap of Coats plus with the telomeric maintenance disorders comprising dyskeratosis congenita, we observed shortened telomeres in three individuals with Coats plus and an increase in spontaneous γ 3H2AX-positive cells in cell lines derived from two affected individual…

DNA polymeraseMolecular Sequence DataTelomere-Binding ProteinsHistones/metabolismHDE GENHDE NEU PEDCST complexCEREBRORETINAL MICROANGIOPATHY FAMILIAL SYNDROME CALCIFICATIONS CYSTS PROTEIN DNA LEUKOENCEPHALOPATHY EVOLUTION DEFECTSHistoneschemistry.chemical_compoundAbnormalities Multiple/geneticsGeneticsmedicineAbnormalities MultipleGenetic Predisposition to DiseaseGeneticsTelomere-binding proteinTelomere/pathologyddc:618biologyBase SequenceGenetic Predisposition to Disease/geneticsDNA replicationSequence Analysis DNATelomeremedicine.diseaseFlow CytometryTelomereCell biologyRetinal Telangiectasis/genetics/pathologychemistrySequence Analysis DNA/methodsbiology.proteinRetinal TelangiectasisPrimaseTelomere-Binding Proteins/geneticsDNADyskeratosis congenitaNature Genetics
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