2021
Lack of GNAS Remethylation During Oogenesis May Be a Cause of Sporadic Pseudohypoparathyroidism Type Ib
Milioto A, Reyes M, Hanna P, Kiuchi Z, Turan S, Zeve D, Agarwal C, Grigelioniene G, Chen A, Mericq V, Frangos M, Ten S, Mantovani G, Salusky I, Tebben P, Jüppner H. Lack of GNAS Remethylation During Oogenesis May Be a Cause of Sporadic Pseudohypoparathyroidism Type Ib. The Journal Of Clinical Endocrinology & Metabolism 2021, 107: e1610-e1619. PMID: 34791361, PMCID: PMC8947795, DOI: 10.1210/clinem/dgab830.Peer-Reviewed Original ResearchConceptsIntracytoplasmic sperm injectionGNAS differentially methylated regionsIn vitro fertilizationLoss of methylationPHP1B patientsGNAS methylationPseudohypoparathyroidism type Ib (PHP1BMaternal GNAS methylation imprintsDifferentially methylated regionsStimulatory G protein alpha-subunitAutosomal dominant PHP1BParathyroid hormone resistancePseudohypoparathyroidism type IbProximal renal tubulesAbnormal GNAS methylationImpaired oocyte maturationOocyte-expressed genesGain of methylationSporadic PHP1BHormone resistanceSperm injectionPHP1BMale factorImprinting defectsGenetic defects
2020
Congenital ichthyosis in Prader–Willi syndrome associated with maternal chromosome 15 uniparental disomy: Case report and review of autosomal recessive conditions unmasked by UPD
Muthusamy K, Macke E, Klee E, Tebben P, Hand J, Hasadsri L, Marcou C, Schimmenti L. Congenital ichthyosis in Prader–Willi syndrome associated with maternal chromosome 15 uniparental disomy: Case report and review of autosomal recessive conditions unmasked by UPD. American Journal Of Medical Genetics Part A 2020, 182: 2442-2449. PMID: 32815268, DOI: 10.1002/ajmg.a.61792.Peer-Reviewed Case Reports and Technical NotesMeSH KeywordsAdolescentAdultAngelman SyndromeChildChild, PreschoolChromosomes, Human, Pair 15Congenital AbnormalitiesFemaleGenes, RecessiveGenomic ImprintingHumansIchthyosisIn Situ Hybridization, FluorescenceInfantInfant, NewbornMaternal InheritancePrader-Willi SyndromeSphingosine N-AcyltransferaseUniparental DisomyYoung AdultConceptsPrader-Willi syndromeAutosomal recessive congenital ichthyosisAutosomal recessive conditionPrader-Willi syndrome/Angelman syndromeCeramide synthase 3Congenital ichthyosisUniparental disomyPathogenic variantsPaternal 15q11-q13 deletionComplex chromosomal rearrangementsCase of autosomal recessive congenital ichthyosisNovel pathogenic variantsDiagnosis of Prader-Willi syndromeRecessive conditionRecessive inherited diseaseAutosomal recessive inherited diseaseChromosomal rearrangementsGenetic mechanismsImprinting defectsMaternal UPD15Prader-WilliClinical courseUPD15Case reportClinical phenotype