0000000000128966

AUTHOR

Aude Plé

showing 2 related works from this author

Docosahexaenoic acid reduces suppressive and migratory functions of CD4CD25 regulatory T-cells

2009

Immunological tolerance is one of the fundamental aspects of the immune system. The CD4(+)CD25(+) regulatory T (Treg) cells have emerged as key players in the development of tolerance to self and foreign antigens. However, little is known about the endogenous factors and mechanisms controlling their suppressive capacity on immune response. In this study, we observed that docosahexaenoic acid (DHA), an n-3 polyunsaturated fatty acid, diminished, in a dose-dependent manner, the capacity of Treg cells to inhibit the CD4(+)CD25(-) effector T-cell proliferation. DHA not only reduced the migration of Treg cells toward chemokines but also downregulated the mRNA expression of CCR-4 and CXCR-4 in Tr…

MaleReceptors CXCR4Chemokineextracellular signal-regulated kinase 1/2Receptors CCR4Docosahexaenoic Acidschemical and pharmacologic phenomenaQD415-436T-Lymphocytes RegulatoryBiochemistryMicehistone desacetylase 7EndocrinologyImmune systemAntigenAntigens CDCell MovementTransforming Growth Factor betaAnimalsCTLA-4 AntigenRNA MessengerIL-2 receptorCells CulturedCell ProliferationDose-Response Relationship DrugbiologySmad7Reverse Transcriptase Polymerase Chain ReactionInterleukin-2 Receptor alpha SubunitFOXP3Forkhead Transcription Factorshemic and immune systemsCell BiologyTransforming growth factor betaInterleukin-10Cell biologyMice Inbred C57BLInterleukin 10Docosahexaenoic acidImmunologybiology.proteinResearch ArticleJournal of Lipid Research
researchProduct

Docosahexaenoic Acid Induces Increases in [Ca2+]ivia Inositol 1,4,5-Triphosphate Production and Activates Protein Kinase Cγ and -δ via Phosphatidylse…

2007

We investigated, in monocytic leukemia U937 cells, the effects of docosahexaenoic acid (DHA; 22:6 n-3) on calcium signaling and determined the implication of phospholipase C (PLC) and protein kinase C (PKC) in this pathway. DHA induced dose-dependent increases in [Ca2+]i, which were contributed by intracellular pool, via the production of inositol-1,4,5-triphosphate (IP3) and store-operated Ca2+ (SOC) influx, via opening of Ca2+ release-activated Ca2+ (CRAC) channels. Chemical inhibition of PLC, PKCgamma, and PKCdelta, but not of PKCbeta I/II, PKCalpha, or PKCbetaI, significantly diminished DHA-induced increases in [Ca2+]i. In vitro PKC assays revealed that DHA induced a approximately 2-fol…

Intracellular FluidDocosahexaenoic AcidsApoptosisInositol 145-TrisphosphatePhosphatidylserinesBiologyEnzyme activatorchemistry.chemical_compoundHumansCalcium SignalingPhosphatidylserine bindingProtein Kinase CProtein kinase CCalcium signalingPharmacologyBinding SitesPhospholipase CU937 CellsPhosphatidylserineMolecular biologyCell biologyEnzyme ActivationProtein Kinase C-deltachemistryDocosahexaenoic acidApoptosisMolecular Medicinelipids (amino acids peptides and proteins)Molecular Pharmacology
researchProduct