Search results for " Gain of function"

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Distal Arthrogryposis type 5 in an Italian family due to an autosomal dominant gain-of-function mutation of the PIEZO2 gene

2022

Abstract Background Arthrogryposis multiplex congenita (AMC) is a group of clinically and etiologically heterogeneous conditions, characterized by prenatal onset contractures affecting two or more joints. Its incidence is about 1 in 3000 live births. AMC may be distinguished into amyoplasia, distal and syndromic arthrogryposis. Distal arthrogryposis (DA) predominantly affects hands and feet. It is currently divided into more than ten subtypes (DA1, DA2A/B, DA3–10), based on clinical manifestations, gene mutations and inheritance pattern. Among them, only a few patients with DA5 have been reported. It is associated to a gain-of-function pathogenic variant of the PIEZO2 gene, encoding for an …

ArthrogryposisContractureOphthalmoplegiaArthrogryposis multiplex congenita Case report DA5 Gain-of-function mutation NGS Ophthalmoplegia PIEZO2 gene Gain of Function Mutation Humans Infant Newborn Inheritance Patterns Ion Channels Mutation Pedigree Retinal Diseases Arthrogryposis Contracture OphthalmoplegiaRetinal DiseasesGain of Function MutationMutationInfant NewbornInheritance PatternsHumansGeneral MedicineIon ChannelsPedigreeItalian Journal of Pediatrics
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Mutant p53 gain of function can be at the root of dedifferentiation of human osteosarcoma MG63 cells into 3AB-OS cancer stem cells

2014

Osteosarcoma is a highly metastatic tumor affecting adolescents, for which there is no second-line chemotherapy. As suggested for most tumors, its capability to overgrow is probably driven by cancer stem cells (CSCs), and finding new targets to kill CSCs may be critical for improving patient survival. TP53 is the most frequently mutated tumor suppressor gene in cancers and mutant p53 protein (mutp53) can acquire gain of function (GOF) strongly contributing to malignancy. Studies thus far have not shown p53-GOF in osteosarcoma. Here, we investigated TP53 gene status/role in 3AB-OS cells-a highly aggressive CSC line previously selected from human osteosarcoma MG63 cells-to evaluate its involv…

HistologyTumor suppressor genePhysiologyEndocrinology Diabetes and MetabolismApoptosisIn situ hybridizationBiologyTNF-Related Apoptosis-Inducing LigandCell MovementCancer stem cellCell Line TumorSettore BIO/10 - BiochimicaBiomarkers TumormedicineHumansNeoplasm Invasiveness3AB-OS cells CSCs Cancer cell dedifferentiation Cancer stem cells FISH Fluorescent in situ hybridization GOF Gain of function Human osteosarcoma MMPs Matrix metalloproteinases Mutant p53 Mutant p53 gain of function Mutp53 OS OsteosarcomaClonogenic assayTumor Stem Cell AssayCell ProliferationMembrane Potential MitochondrialOsteosarcomaCancerReceptors Death DomainCell DedifferentiationCell cyclemedicine.diseaseMolecular biologyAmino Acid SubstitutionProto-Oncogene Proteins c-bcl-2Gene Knockdown TechniquesMutationNeoplastic Stem CellsCancer researchOsteosarcomaEctopic expressionTumor Suppressor Protein p53Bone
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