6533b7d2fe1ef96bd125f762
RESEARCH PRODUCT
CD4+CD25+ regulatory T cells inhibit natural killer cell functions in a transforming growth factor-beta-dependent manner.
Jacky BernardAntônio C. FreitasJean-yves BlayCaroline FlamentOrianne Wagner-ballonLaurence ZitvogelCédric MénardA. LecesneMagali TermeT. TurszCaroline RobertBernard EscudierWilliam VainchenkerEric VivierClaude CapronJulien TaiebSophie Caillat-zucmanFrançois GhiringhelliSophie NovaultNathalie ChaputPierre E. PuigFrançois Martinsubject
MESH : CytokinesMESH: Flow CytometryMESH : Immunity NaturalMESH: T-LyLymphocyte ActivationT-Lymphocytes RegulatoryMiceInterleukin 210302 clinical medicineT-Lymphocyte SubsetsTransforming Growth Factor betaNeoplasmsMESH : Receptors ImmunologicMESH : Cell ProliferationImmunology and Allergy[ SDV.IMM ] Life Sciences [q-bio]/ImmunologyMESH: AnimalsMESH: NeoplasmsIL-2 receptorReceptors Immunologic0303 health sciencesMESH: Cytokineshemic and immune systemsFlow CytometryNatural killer T cell3. Good healthCell biologyKiller Cells Naturalmedicine.anatomical_structureNK Cell Lectin-Like Receptor Subfamily KInterleukin 12CytokinesReceptors Natural Killer Cell[SDV.IMM]Life Sciences [q-bio]/ImmunologyFranceMESH : Killer Cells NaturalMESH : Cytotoxicity Tests ImmunologicMESH: Killer Cells NaturalMESH: Cell Line TumorMESH : Flow CytometryImmunologychemical and pharmacologic phenomenaMESH: Cytotoxicity Tests ImmunologicMESH : Mice Inbred C57BLBiologyArticleNatural killer cell03 medical and health sciencesMESH: Mice Inbred C57BLCell Line TumorMESH: Cell ProliferationMESH : MicemedicineAnimalsHumansAntigen-presenting cellMESH: Lymphocyte ActivationMESH : FranceMESH: MiceMESH: Receptors ImmunologicMESH : Lymphocyte ActivationCell Proliferation030304 developmental biologyMESH: Immunity NaturalLymphokine-activated killer cellMESH: HumansMESH : Cell Line TumorMESH : HumansCytotoxicity Tests ImmunologicNKG2DMESH : T-LyMESH : NeoplasmsImmunity InnateMice Inbred C57BLMESH: FranceMESH : Animals030215 immunologydescription
Tumor growth promotes the expansion of CD4+CD25+ regulatory T (T reg) cells that counteract T cell–mediated immune responses. An inverse correlation between natural killer (NK) cell activation and T reg cell expansion in tumor-bearing patients, shown here, prompted us to address the role of T reg cells in controlling innate antitumor immunity. Our experiments indicate that human T reg cells expressed membrane-bound transforming growth factor (TGF)–β, which directly inhibited NK cell effector functions and down-regulated NKG2D receptors on the NK cell surface. Adoptive transfer of wild-type T reg cells but not TGF-β−/− T reg cells into nude mice suppressed NK cell–mediated cytotoxicity, reduced NKG2D receptor expression, and accelerated the growth of tumors that are normally controlled by NK cells. Conversely, the depletion of mouse T reg cells exacerbated NK cell proliferation and cytotoxicity in vivo. Human NK cell–mediated tumor recognition could also be restored by depletion of T reg cells from tumor-infiltrating lymphocytes. These findings support a role for T reg cells in blunting the NK cell arm of the innate immune system.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-07-31 |