Search results for " PTHrP"

showing 10 items of 10 documents

Mid-region parathyroid hormone-related protein (PTHrP) binds chromatin of MDA-MB231 breast cancer cells and isolated oligonucleotides “in vitro”

2006

We have previously shown that PTHrP(38-94)-amide restrains growth and invasion "in vitro", causes striking toxicity and accelerates death of some breast cancer cell lines, the most responsive being MDA-MB231 whose tumorigenesis was also attenuated "in vivo". PTHrP(38-94)-amide contains the domain implicated in the nuclear import of PTHrP. Although the nucleus was identified as a destination for mid-region PTHrP, evidence for direct DNA-binding capability is lacking to date. Here, we examined the localization of PTHrP(38-94)-amide within MDA-MB231 cells and within metaphase spread preparations and characterized its DNA-binding properties, employing a combination of immunocytochemical, cytoge…

Cancer ResearchBreast cancer DNA-binding PTHrPCellActive Transport Cell NucleusOligonucleotidesDNA footprintingBreast NeoplasmsBiologymedicine.disease_causeModels BiologicalMagneticsIn vivoCell Line TumormedicineHumansSettore BIO/06 - Anatomia Comparata E Citologiaskin and connective tissue diseasesMetaphaseCell NucleusGenomeParathyroid hormone-related proteinParathyroid Hormone-Related ProteinDNAChromatinIn vitroChromatinCell biologySettore BIO/18 - Geneticamedicine.anatomical_structureOncologyCancer researchNuclear transportPeptidesCarcinogenesishormones hormone substitutes and hormone antagonistsProtein Binding
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Midregion PTHrP and Human Breast Cancer Cells

2010

PTHrP is a polyhormone undergoing proteolytic processing into smaller bioactive forms, comprising an N-terminal peptide, which is the mediator of the “classical” PTH-like effect, as well as midregion and C-terminal peptides. The midregion PTHrP domain (38-94)-amide was found to restrain growth and invasionin vitroof some breast cancer cell lines, causing striking toxicity and accelerating death; the most responsive being MDA-MB231, whose tumorigenesis was also attenuatedin vivo. In addition, midregion PTHrP appears to be imported in the nucleoplasm of cultured MDA-MB231 cells andin vitro, it can bind chromatin of metaphase spread preparations and also an isolated 20-mer oligonucleotide, the…

Gene Expressionlcsh:MedicineBreast NeoplasmsDNA FragmentationBiologymedicine.disease_causelcsh:TechnologyGeneral Biochemistry Genetics and Molecular BiologyTranscription (biology)Cell Line TumorPTHrP breast cancer cancer cell gene expression cytotoxicityGene expressionmedicineHumansSettore BIO/06 - Anatomia Comparata E CitologiaMDA-MB231lcsh:ScienceDNA statusGeneral Environmental ScienceMini-Review ArticleNucleoplasmlcsh:Tmidregion PTHrPlcsh:RParathyroid Hormone-Related ProteinapoptosisGeneral MedicineMolecular biologynuclear importIn vitroCell biologyChromatinPTHrP (38-94)Cancer cellprotein degradationFemalelcsh:QCarcinogenesisReprogrammingbreast cancer cellsThe Scientific World Journal
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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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Il PTHrP [38-94]-amide è un fattore “DNA-binding”: dati citogenetica e molecolari ed effetto biologico su cellule epiteliali mammarie immortalizzate …

2004

Settore BIO/18 - Geneticabreast cancer PTHrPSettore BIO/06 - Anatomia Comparata E Citologia
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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 [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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Rip-1 regulation of caspase expression in PTHrP [38-94]-treated MDA-MB231 breast cancer cells

2004

breast cancer PTHrPSettore BIO/06 - Anatomia Comparata E Citologia
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Rip-1 controlla l’espressione delle caspasi in cellule MDA-MB231 trattate con PTHrP[38-94]-amide

2004

breast cancer PTHrPSettore BIO/06 - Anatomia Comparata E Citologia
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Estudio del secretoma de las células madre de tejido adiposo y de péptidos PTHrP en células articulares osteoartríticas

2016

La osteoartritis (OA) es la patología articular más frecuente y la causa más importante de discapacidad en personas de edad avanzada. Existe un gran interés en el estudio de nuevas dianas terapéuticas que puedan facilitar la prevención o tratamiento de la OA, ya que actualmente no existe ningún tratamiento eficaz. En este trabajo, se han abordado dos posibles nuevas estrategias: el medio acondicionado (MA) de las células madre del tejido adiposo (ASCs) y los péptidos derivados de la proteína relacionada con la hormona paratiroidea (PTHrP). Las ASCs tienen un elevado potencial terapéutico. Numerosos estudios han mostrado que ejercen efectos beneficiosos en diferentes modelos de enfermedad a …

osteoartritisinflamaciónUNESCO::CIENCIAS MÉDICAScélulas madre de tejido adipososenescencia:CIENCIAS MÉDICAS [UNESCO]péptidos derivados de PTHrP
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