Search results for "CXC"
showing 10 items of 159 documents
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…
Mast Cells and Th17 Cells Contribute to the Lymphoma-Associated Pro-Inflammatory Microenvironment of Angioimmunoblastic T-Cell Lymphoma
2010
Reports focusing on the immunological microenvironment of peripheral T-cell lymphomas (PTCL) are rare. Here we studied the reciprocal contribution of regulatory (Treg) and interleukin-17-producing (Th17) T-cells to the composition of the lymphoma-associated microenvironment of angioimmunoblastic T-cell lymphoma (AITL) and PTCL not otherwise specified on tissue microarrays from 30 PTCLs not otherwise specified and 37 AITLs. We found that Th17 but not Treg cells were differently represented in the two lymphomas and correlated with the amount of mast cells (MCs) and granulocytes, which preferentially occurred in the cellular milieu of AITL cases. We observed that MCs directly synthesized inter…
Anti-metastatic activity of heparin is probably associated with modulation of SDF-1-CXCR4 axis
2006
IL-27 improves migrational and antiviral potential of CB dendritic cells.
2013
Abstract Interleukin (IL)-27 is known to be increased considerably in cord blood (CB) dendritic cells (DCs) after TLR ligation. Previously, we demonstrated that also basal IL-27 levels are higher in CB DCs. Here, we examined effects of IL-27 on monocyte derived dendritic cells (moDCs) to approach its particular role in the specialized immune system of the human neonate. Exogenous IL-27 promotes IL-27 transcription in CB and adult blood (AB) moDCs. IL-27 acts on CB moDCs primarily by significantly augmenting IL-27 protein, secondarily by increasing transcription of CXCL10 among other chemokines, chemokine receptor CCR1, interferon stimulated genes, transcription factor IRF8 and genes involve…
Chemokine receptor CCR7 on CD4+ T cells plays a crucial role in the induction of experimental autoimmune encephalomyelitis
2014
Esudio de la implicación de los receptores de quimiocinas CXCR3-A y CXCR7 y sus ligandos en la progresión del melanoma cutáneo humano.
2015
El melanoma es un tumor maligno que se desarrolla a partir de los melanocitos, células que derivan de la cresta neural. La mayoría de los melanomas se localizan en la piel y menos frecuentemente en mucosas y otras localizaciones. Al igual que en la mayoría de los tumores malignos, la principal causa de mortalidad en el melanoma es la aparición de metástasis, por lo que es muy importante que la detección del tumor tenga lugar antes de que se inicie este proceso. En la mayor parte de casos, el diagnóstico precoz se puede realizar de forma relativamente sencilla, debido a que el melanoma presenta dos fases de crecimiento bien diferenciadas, una radial (intraepidérmica) y otra vertical (intradé…
Estudio de nuevos mecanismos angiogénicos e inflamatorios asociados a la obesidad
2023
La obesidad es una enfermedad metabólica que se caracteriza por la acumulación excesiva de grasa acompañada de una inflamación crónica, leve y sistémica, debido a la elevada ingesta calórica, entre otros factores. Esta patología tiene varios grados y se diagnostica cuando los sujetos tienen un índice de masa corporal (IMC) mayor o igual a 30 kg/m2. Su prevalencia se ha triplicado a nivel mundial en los últimos 50 años y se ve afectada, aproximadamente, el 40% de la población mundial. Los mayores problemas de la obesidad son su alta mortalidad y el riesgo alto de desarrollar otras patologías asociadas como el síndrome metabólico y la diabetes mellitus tipo 2. El tejido adiposo se ha reconoci…
Abstract PO-46: Mechanisms of resistance to the PI3K inhibitor copanlisib in marginal zone lymphoma
2020
Abstract Background: PI3Kδ is expressed in B cells and has a central role in the B-cell receptor signaling. Copanlisib is a highly selective PI3Kδ and PI3Kα inhibitor, and it is currently under clinical development in indolent lymphomas including marginal zone lymphoma (MZL). Copanlisib is Food and Drug Administration (FDA) approved for the treatment of patients with relapsed or refractory follicular lymphoma. Nevertheless, a subset of patients can eventually relapse due to acquired resistance. A better understanding of resistance mechanisms could help to design improved therapies; hence, we generated MZL cell lines resistant to copanlisib. Materials and Methods: Cells were kept on copanlis…
Synthesis and studies of new optimised chelating agents for targeting chemokine receptor CXCR4
2012
The objective of this thesis work was to develop CXCR4-targeted tools to localize and treat cancer at an early stage. In this line, we investigated the synthesis of new target-specific radiopharmaceuticals. The work focused on two main axes, i.e. the chelating agent and the carrier, by using the know-how and the expertise of our group in polyazacycloalkanes synthesis and functionalization. In the first part, we were interested in developing new macrocyclic scaffolds of high potential for copper and gallium chelation. We first focused on the development of a new powerful route towards selectively functionalized constrained homocyclens. The second part was based on C-functionalized 1,4,7-tria…
GPCR Inhibition in Treating Lymphoma
2022
G protein-coupled receptors (GPCRs) are important classes of cell surface receptors involved in multiple physiological functions. Aberrant expression, upregulation, and mutation of GPCR signaling pathways are frequent in many types of cancers, promoting hyperproliferation, angiogenesis, and metastasis. Recent studies showed that alterations of GPCRs are involved in different lymphoma types. Herein, we review the synthetic strategies to obtain GPCR inhibitors, focusing on CXCR4 inhibitors which represent most of the GPCR inhibitors available in the market or under preclinical investigations for these diseases.