Search results for "Proto-Oncogene Proteins c-bcl-6"

showing 8 items of 8 documents

NFATc1 releases BCL6-dependent repression of CCR2 agonist expression in peritoneal macrophages fromSaccharomyces cerevisiaeinfected mice

2016

The link between the extensive usage of calcineurin (CN) inhibitors cyclosporin A and tacrolimus (FK506) in transplantation medicine and the increasing rate of opportunistic infections within this segment of patients is alarming. Currently, how peritoneal infections are favored by these drugs, which impair the activity of several signaling pathways including the Ca(++) /CN/NFAT, Ca(++) /CN/cofilin, Ca(++) /CN/BAD, and NF-κB networks, is unknown. Here, we show that Saccharomyces cerevisiae infection of peritoneal resident macrophages triggers the transient nuclear translocation of NFATc1β isoforms, resulting in a coordinated, CN-dependent induction of the Ccl2, Ccl7, and Ccl12 genes, all enc…

0301 basic medicineChemokineReceptors CCR2Calcineurin InhibitorsImmunologySaccharomyces cerevisiaeOpportunistic InfectionsCCL7MonocytesMice03 medical and health sciences0302 clinical medicineCyclosporin aAnimalsProtein IsoformsImmunology and AllergyChemokine CCL7Promoter Regions GeneticCCL12Transcription factorChemokine CCL2NFATC Transcription FactorsbiologyCalcineurinNF-kappa BNFATNFATC Transcription FactorsMonocyte Chemoattractant Proteins3. Good healthCalcineurinProtein Transport030104 developmental biology030220 oncology & carcinogenesisMacrophages PeritonealProto-Oncogene Proteins c-bcl-6biology.proteinCancer researchEuropean Journal of Immunology
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Analysis of chronic lymphotic leukemia transcriptomic profile: differences between molecular subgroups

2009

B cell chronic lymphocytic leukemia (CLL) is a lymphoproliferative disorder with a variable clinical course. Patients with unmutated IgV(H) gene show a shorter progression-free and overall survival than patients with immunoglobulin heavy chain variable regions (IgV(H)) gene mutated. In addition, BCL6 mutations identify a subgroup of patients with high risk of progression. Gene expression was analysed in 36 early-stage patients using high-density microarrays. Around 150 genes differentially expressed were found according to IgV(H) mutations, whereas no difference was found according to BCL6 mutations. Functional profiling methods allowed us to distinguish KEGG and gene ontology terms showing…

AdultMaleCancer ResearchBCL6BiologyIgVHgenomichemic and lymphatic diseasesmedicineHumansKEGGGenemicroarraysAgedAged 80 and overRegulation of gene expressionGeneticsB-LymphocytesGene Expression ProfilingZAP70HematologyMiddle Agedmedicine.diseaseBCL6Leukemia Lymphocytic Chronic B-CellDNA-Binding ProteinsGene Expression Regulation NeoplasticGene expression profilingLeukemiaOncologyTranscriptomicHealthMutationProto-Oncogene Proteins c-bcl-6Cancer researchImmunoglobulin heavy chainFemaleImmunoglobulin Heavy ChainsCLL
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BCL6: somatic mutations and expression in early-stage chronic lymphocytic leukemia

2009

BCL6 somatic mutations affect normal and tumoral post germinal center B-lymphocytes. Our objective was to analyse expression, mutations and polymorphisms in the BCL6 gene and to correlate those variables with the clinical outcome in early-stage chronic lymphocytic leukemia (CLL). CLL samples were used for characterisation of the mutational status of BCL6/ immunoglobulin variable heavy chain (IGHV) genes, and expression of BCL6 was determined by real time PCR and immunoblot. Out of 68 cases, 29% show somatic mutations on BCL6 which occur exclusively in IGHV mutated cases. They are single nucleotide substitutions located mainly in two short mutational hot spots. CLL cells express different le…

AdultMaleCancer ResearchSomatic cellChronic lymphocytic leukemiaBiologyPredictive Value of Testsimmune system diseaseshemic and lymphatic diseasesmedicineHumansPoint MutationGeneAgedAged 80 and overPolymorphism GeneticGenes ImmunoglobulinGerminal centerHematologyMiddle AgedPrognosismedicine.diseaseBCL6Leukemia Lymphocytic Chronic B-CellDNA-Binding ProteinsTreatment OutcomeReal-time polymerase chain reactionOncologyMutationImmunologyProto-Oncogene Proteins c-bcl-6biology.proteinFemaleAntibodyImmunoglobulin Heavy ChainsIGHV@Leukemia & Lymphoma
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Bcl-6 mutation status provides clinically valuable information in early-stage B-cell chronic lymphocytic leukemia

2004

In B-cell chronic lymphocytic leukemia (B-CLL), somatic mutation of IgVH genes defines a subgroup with favorable prognosis, whereas the absence of IgVH mutations is correlated with a worse outcome. Mutations of the BCL-6 gene are also observed in a subset of B-CLL, but the clinical significance of this molecular alteration remains uncertain. We examined the distribution of IgVH and BCL-6 gene mutations in 95 well-characterized patients with Binet stage A B-CLL, and correlated them with clinical, laboratory, cytogenetic findings and disease progression. Mutations of the BCL-6 gene were observed only in cases harboring mutated IgVH. Unexpectedly, coexistence of IgVH and BCL-6 mutations was co…

AdultMaleOncologyCancer Researchmedicine.medical_specialtyChronic lymphocytic leukemiaImmunoglobulin Variable RegionLocus (genetics)BiologyGene mutationDisease-Free SurvivalGermline mutationProto-Oncogene ProteinsInternal medicinemedicineHumansB-cell chronic lymphocytic leukemiaClinical significanceProspective StudiesGeneAgedAged 80 and overHematologyChromosomes Human Pair 11HematologyMiddle AgedPrognosismedicine.diseaseLeukemia Lymphocytic Chronic B-CellDNA-Binding ProteinsOncologyMutationImmunologyProto-Oncogene Proteins c-bcl-6FemaleChromosome DeletionChromosomes Human Pair 17Follow-Up StudiesTranscription FactorsLeukemia
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IL-21 Regulates the Differentiation of a Human γδ T Cell Subset Equipped with B Cell Helper Activity

2012

Vγ9Vδ2 T lymphocytes recognize nonpeptidic antigens without presentation by MHC molecules and display pleiotropic features. Here we report that coculture of Vγ9Vδ2 cells with phosphoantigen and IL-21 leads to selective expression of the transcription repressor Bcl-6 and polarization toward a lymphocyte subset displaying features of follicular B-helper T (T(FH)) cells. T(FH) like Vγ9Vδ2 cells have a predominant central memory (CD27(+)CD45RA(-)) phenotype and express ICOS, CD40L and CXCR5. Upon antigen activation, they secrete IL-4, IL-10 and CXCL13, and provide B-cell help for antibody production in vitro. Our findings delineate a subset of human Vγ9Vδ2 lymphocytes, which, upon interaction w…

Anatomy and PhysiologyImmunoglobulin delta-ChainsB CellsCellular differentiationAntibody Affinitylcsh:MedicineAdaptive Immunitychemistry.chemical_compoundWhite Blood CellsSpectrum Analysis TechniquesCell MovementAnimal CellsImmune PhysiologyMedicine and Health SciencesCytotoxic T celllcsh:ScienceImage CytometryB-LymphocytesMultidisciplinarybiologyT CellsCell DifferentiationT-Lymphocytes Helper-InducerFlow CytometryInnate ImmunityDNA-Binding Proteinsmedicine.anatomical_structureIL-21 differentiation Vγ9Vδ2 T lymphocytesSpectrophotometryCD4 AntigensProto-Oncogene Proteins c-bcl-6CytokinesMedicineCytophotometryChemokinesCellular TypesResearch ArticleCD4 antigenImmunoglobulin gamma-ChainsImmune CellsImmunologyMajor histocompatibility complexResearch and Analysis MethodsAntigenmedicineHumansCXCL13Antibody-Producing CellsBiologyB cellCell ProliferationSettore MED/04 - Patologia GeneraleCD40Blood CellsInterleukinsFluorimetrylcsh:RImmunityBiology and Life SciencesCell BiologyMolecular biologyRetractionchemistryGene Expression RegulationHumoral Immunitybiology.proteinClinical Immunologylcsh:QDevelopmental BiologyPloS one
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The BCL6 gene in B-cell lymphomas with 3q27 translocations is expressed mainly from the rearranged allele irrespective of the partner gene

2003

The BCL6 gene, which functions as a transcription repressor, is the target of multiple chromosomal translocations in non-Hodgkin's lymphomas (NHL). These translocations occur in the nontranslated region of the BCL6 gene, juxtaposing regulatory sequences of the diverse partner genes to the open reading frame of the BCL6 gene and thus are thought to deregulate BCL6 gene expression. The levels of expression of the BCL6 gene and protein have been demonstrated to predict the clinical outcome of diffuse large B-cell lymphomas. By contrast, the prognostic significance of BCL6 gene translocations is unclear. In this study we have sought an explanation for this apparent discrepancy. We examined tumo…

Cancer ResearchLymphoma B-CellBiologyTranslocation Geneticimmune system diseasesProto-Oncogene Proteinshemic and lymphatic diseasesGene expressionTumor Cells CulturedHumansRNA MessengerAllelePromoter Regions GeneticGeneAllelesGene RearrangementGeneticsRegulation of gene expressionPromoterHematologyGene rearrangementBCL6Neoplasm ProteinsDNA-Binding ProteinsGene Expression Regulation NeoplasticRepressor ProteinsOncologyRegulatory sequenceMutationProto-Oncogene Proteins c-bcl-6Cancer researchChromosomes Human Pair 3Transcription FactorsLeukemia
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HSPH1 inhibition downregulates Bcl-6 and c-Myc and hampers the growth of human aggressive B-cell non-Hodgkin lymphoma

2015

We have shown that human B-cell non-Hodgkin lymphomas (B-NHLs) express heat shock protein (HSP)H1/105 in function of their aggressiveness. Here, we now clarify its role as a functional B-NHL target by testing the hypothesis that it promotes the stabilization of key lymphoma oncoproteins. HSPH1 silencing in 4 models of aggressive B-NHLs was paralleled by Bcl-6 and c-Myc downregulation. In vitro and in vivo analysis of HSPH1-silenced Namalwa cells showed that this effect was associated with a significant growth delay and the loss of tumorigenicity when 10(4) cells were injected into mice. Interestingly, we found that HSPH1 physically interacts with c-Myc and Bcl-6 in both Namalwa cells and pr…

Lymphoma B-CellXenograft Model Antitumor AssayDNA-Binding ProteinImmunologyDown-RegulationMice SCIDSettore MED/08 - Anatomia PatologicaBiologyBiochemistryHSP110 Heat-Shock ProteinProto-Oncogene Proteins c-mycMiceDownregulation and upregulationimmune system diseasesCell Line Tumorhemic and lymphatic diseasesHeat shock proteinGene Knockdown TechniquesmedicineAnimalsHumansGene silencingHSP110 Heat-Shock ProteinsAnimals; Cell Line Tumor; DNA-Binding Proteins; Down-Regulation; Gene Knockdown Techniques; HSP110 Heat-Shock Proteins; Humans; Lymphoma B-Cell; Mice; Mice SCID; Proto-Oncogene Proteins c-myc; Xenograft Model Antitumor Assays; Biochemistry; Immunology; Medicine (all); Hematology; Cell BiologyAnimalMedicine (all)Cell BiologyHematologymedicine.diseaseXenograft Model Antitumor AssaysIn vitroLymphomaDNA-Binding ProteinsCell cultureGene Knockdown TechniquesGene Knockdown TechniqueImmunologyProto-Oncogene Proteins c-bcl-6Cancer researchB-Cell Non-Hodgkin LymphomaHumanBlood
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Dual-targeting siRNAs.

2010

We have developed an algorithm for the prediction of dual-targeting short interfering RNAs (siRNAs) in which both strands are deliberately designed to separately target different mRNA transcripts with complete complementarity. An advantage of this approach versus the use of two separate duplexes is that only two strands, as opposed to four, are competing for entry into the RNA-induced silencing complex. We chose to design our dual-targeting siRNAs as Dicer substrate 25/27mer siRNAs, since design features resembling pre-microRNAs (miRNAs) can be introduced for Dicer processing. Seven different dual-targeting siRNAs targeting genes that are potential targets in cancer therapy have been develo…

STAT3 Transcription FactorSmall interfering RNATranscription GeneticTrans-acting siRNAGenes mycMethodComputational biologyKidneyPolymerase Chain ReactionCell LineSuppression GeneticRNA interferencemicroRNAGene silencingHumansRNA MessengerRNA Small InterferingMolecular BiologyGeneticsGene knockdownbiologyBase SequenceRNAProtein Biosynthesisbiology.proteinProto-Oncogene Proteins c-bcl-6AlgorithmsDicerRNA (New York, N.Y.)
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