Search results for "PTHrP"

showing 10 items of 22 documents

Metilazione del DNA in artrite reumatoide

2005

Lo stato di metilazione del DNA genomico e del gene PTHrP è stato valutato con tecniche molecolari e citogenetiche in artrite reumatoide (AR), patologia autoimmune caratterizzata anche da alta incidenza di linfomi e da ipercalcemia per overespressione del gene PTHrP. La metilazione del DNA, infatti, ha un ruolo critico nello sviluppo delle malattie neoplastiche; il gene PTHrP avendo tre promotori uno dei quali contiene un’isola CpG è un buon candidato per la deregolazione da alterato pattern di metilazione locale. Le indagini sulla metilazione genomica, condotte su DNA estratto da sangue periferico di pazienti e di donatori e amplificato in reazioni di Methylation-Sensitive Arbitrarily Prim…

Settore BIO/18 - Geneticainstead chromosomes of controls were almost uniformly decorated by brilliant grains. Studies on methylation of PTHrP gene promoter 2 performed on five CpG island internal sites using the Methylation-Sensitive Restriction Endonuclease Multiplex (MSREM)-PCR showed that one of the sites nearest the trascription starting point is heavy methylated in a significantly high number of RA patients. Thus RA seems to be characterized by genomewide hypomethylation associated with local hypermethylation like the most part of tumors. This result raises the possibility that susceptibility to lymphomas is related to abnormal DNA methylation levels and suggests the opportunity to evaluate the DNA methylation status in RA patientin fact the demethylating therapies together with diet and life style can act towards an increase of tumor risk. Future studies using a larger number of subjects could confirm these findings.Rheumatoid Arthritis (RA) is a chronic multisystem inflammatory disease characterized by high recurrence of lymphomas as well as hypercalcemia due to PTHrP overexpression. Because of DNA methylation plays a critical role in development of neoplasias we determined in RA patients the global DNA methylation status and local methylation pattern of the CpG island of one of the three promoters of PTHrP gene utilizing molecular and cytogenetic techniques. Investigations performed on DNA from peripheral blood of patients and donors amplified by Methylation-Sensitive Arbitrarily Primed (MeS-AP)-PCR indicated that RA is strongly associated with global DNA hypomethylation. Similarly chromosomal DNA methylation pattern analysis by indirect immunofluorescence technique with anti 5-methylcitosine antibody showed all peripheral lymphocyte metaphases from RA patients with chromosomes weakly fluorescent without discrete grain
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PTHrP in differentiating human mesenchymal stem cells: Transcript isoform expression, promoter methylation, and protein accumulation

2013

Human PTHrP gene displays a complex organization with nine exons producing diverse mRNA variants due to alternative splicing at 5' and 3' ends and the existence of three different transcriptional promoters (P1, P2 and P3), two of which (P2 and P3) contain CpG islands. It is known that the expression of PTHrP isoforms may be differentially regulated in a developmental stage- and tissue-specific manner. To search for novel molecular markers of stemness/differentiation, here we have examined isoform expression in fat-derived mesenchymal stem cells both maintained in stem conditions and induced toward adipo- and osteogenesis. In addition, the expression of the splicing isoforms derived from P2 …

Gene isoformTranscription GeneticPTHrPCellular differentiationpromoter methylationBiologyOsteocytesBiochemistryGene expressionAdipocytesHumansProtein IsoformsadipogenesiSettore BIO/06 - Anatomia Comparata E CitologiaPromoter Regions Geneticmesenchymal stem cellCells CulturedMessenger RNAMesenchymal stem cellAlternative splicingParathyroid Hormone-Related ProteinCell DifferentiationMesenchymal Stem CellsExonsGeneral MedicineMethylationDNA MethylationosteogenesiMolecular biologyIntronsPTHrP; mesenchymal stem cells; osteogenesis; adipogenesis; gene expression; promoter methylationAlternative SplicingSettore BIO/18 - GeneticaGene Expression Regulationgene expressionCpG IslandsStem cellBiochimie
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PTHrP expression and mesenchymal stem cell differentiation

2010

PTHrP mesenchymal stem cell cell differentiationSettore BIO/06 - Anatomia Comparata E Citologia
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The expression of PTHrP isoforms in differentiating human fat-derived mesenchymal stem cells

2012

PTHrP breast cancer mesenchymal stem cells gene expressionSettore BIO/06 - Anatomia Comparata E Citologia
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The role of extracellular calcium in bone metastasis

2016

AbstractThis review summarizes the role of extracellular calcium, as found present in the bone tissue, in the process of bone metastasis.

0301 basic medicinelcsh:Diseases of the musculoskeletal systemIGF insulin-like growth factorPGE-2 prostaglandin E-2Bone tissueFibroblast growth factorM-CSF macrophage colony-stimulating factorPDGF platelet-derived growth factorBone remodelingSK3 small conductance calcium-activated potassium channel 30302 clinical medicineERK extracellular signal-regulated kinaseTGFβ transforming growth factor betaBMP's bone morphogenetic proteinsbiologyAKT AKT8 virus oncogene cellular homologBone metastasislcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogenshumanitiescAMP cyclic adenosine monophosphatemedicine.anatomical_structureOncologyRANKL030220 oncology & carcinogenesisIon channelsCaSR calcium-sensing receptorPTHrP parathyroid hormone-related proteinPlatelet-derived growth factor receptorResearch PaperTRP transient receptor potentialmedicine.medical_specialtychemistry.chemical_elementCalciumRANKL receptor activator of NF-κB ligandlcsh:RC254-28203 medical and health sciencesPLC phospholipase CInternal medicinemedicineExtracellularCaSRET-1 endothelin-1PTEN phosphatase and tensin homolog deleted on chromosome 10business.industryBone metastasismedicine.diseaseFGF fibroblast growth factor030104 developmental biologyEndocrinologyPSA prostate specific antigenchemistryCOPD chronic obstructive pulmonary diseasebiology.proteinCancer researchJNK jun N-terminal kinasePKA protein kinase ARANK receptor activator of NF-κBCalciumlcsh:RC925-935businessMAPK mitogen-activated protein kinaseJournal of Bone Oncology
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PTHrP [38-94]-amide is a DNA-binding factor: cytogenetic and molecular evidence and biological effect on normal and neoplastic human breast cells

2004

Settore BIO/18 - Geneticabreast cancer PTHrPSettore BIO/06 - Anatomia Comparata E Citologia
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Parathyroid Hormone-Related Protein (PTHrP): A Key Regulator of Life/Death Decisions by Tumor Cells with Potential Clinical Applications

2010

Parathyroid hormone-related protein (PTHrP), classically regarded as the mediator of the humoral hypercalcemia of malignancy syndrome, is a polyhormone that undergoes proteolytic processing into smaller bioactive forms. These bioactive forms comprise an N-terminal- as well as midregion- and C-terminal peptides, which have been shown to regulate various biological events, such as survival, proliferation and differentiation, in diverse cell model systems, both normal and pathological. A number of experimental data have demonstrated that PTHrP is also able to modulate tumor-relevant phenotypic expressions, thereby playing a role in early and advanced tumorigenesis, and in the response to treat…

Cancer ResearchPTHrPtumor cellsRegulatorReviewmedicine.disease_causeBioinformaticslcsh:RC254-282MediatorIn vivomedicineSettore BIO/06 - Anatomia Comparata E CitologiaParathyroid hormone-related proteinCell growthbusiness.industryapoptosislcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogensapoptosiPhenotypecell proliferationOncologyApoptosisCancer researchCarcinogenesisbusinesshormones hormone substitutes and hormone antagonistsCancers
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PTHrP [38-94] is a survival- and growth-promoting factor for non-tumoral breast epithelial cells.

2005

breast cancer PTHrPSettore BIO/06 - Anatomia Comparata E Citologia
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Espressione cadmio-dipendente di AEG-1, c-fos e c-jun in cellule tumorali mammarie umane

2007

breast cancer PTHrPSettore BIO/06 - Anatomia Comparata E Citologia
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Effect of mid-region PTHrP on tumoral and immortalized human breast cells

2005

PTHrP breast cancerSettore BIO/06 - Anatomia Comparata E Citologia
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