Search results for " Human osteosarcoma"

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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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MicroRNA-29b-1 is involved in self-renewal and fate decisions of human osteosarcoma 3AB-OS cancer stem cells

2014

Emerging evidence suggests that treatments targeting cancer stem cells (CSCs) within a tumor can halt cancer and improve patient survival. Moreover, identification of CSC-related MicroRNAs (miRNAs) would provide information for a better understanding of CSCs. miR-29 family is a class of miRNAs aberrantly expressed in multiple cancers. They are frequently down-regulated in osteosarcoma (OS), the most common form of childhood cancer with a potent metastasizing potential. 3AB-OS CSC, a human pluripotent CSC line by us produced from the human osteosarcoma MG63 cells (1) is a useful model to study CSC origin and roles (2). Previously, we have shown that in 3AB-OS CSCs miR-29b is potently down-re…

MicroRNA-29b-1 self-renewal human osteosarcoma 3AB-OS cancer stem cells
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