PMID- 20153036 OWN - NLM STAT- MEDLINE DCOM- 20100407 LR - 20211028 IS - 1097-6825 (Electronic) IS - 0091-6749 (Linking) VI - 125 IP - 3 DP - 2010 Mar TI - Induction of anergic allergen-specific suppressor T cells using tolerogenic dendritic cells derived from children with allergies to house dust mites. PG - 727-36 LID - 10.1016/j.jaci.2009.12.004 [doi] AB - BACKGROUND: Dendritic cells (DCs) regulate the immune response to allergens in the lung; they induce either effector or regulatory T cells, which promote or suppress, respectively, the development of allergy. IL-10 is a potent immunosuppressive cytokine that induces type 1 regulatory (Tr1) T cells. OBJECTIVE: To generate allergen-specific Tr1 cells in vitro from children with allergy. METHODS: Monocyte-derived DCs from children with allergy to house dust mites (HDM) were generated by incubating the cells with IL-10 and pulsing them with Der p 2, a major HDM allergen, or by pulsing them with Der p 2 and incubating them with IL-10 during their last 2 days of differentiation. RESULTS: Der p 2-specific T-cell proliferation and T(H)2 cytokine production were significantly reduced when T cells from patients with allergy to HDM were activated with autologous Der p 2-pulsed DCs that had been differentiated or incubated with IL-10. T-cell lines generated with Der p 2-pulsed DCs that were differentiated with IL-10 were hyporesponsive to reactivation with Der p 2 and able to suppress Der p 2-specific T(H)2 effector cells. CONCLUSION: Dendritic cells differentiated in the presence of IL-10 and pulsed with allergen gave rise to a population of tolerogenic DCs that induced allergen-specific Tr1 cells. This finding represents an important step forward to the prospective clinical application of tolerogenic DCs to modulate allergen-specific T-cell responses. FAU - Pacciani, Valentina AU - Pacciani V AD - Department of Pediatric Medicine, Immuno-Infectivology Unit, Bambino Gesu' Children's Hospital, Rome, Italy. FAU - Gregori, Silvia AU - Gregori S FAU - Chini, Loredana AU - Chini L FAU - Corrente, Stefania AU - Corrente S FAU - Chianca, Marco AU - Chianca M FAU - Moschese, Viviana AU - Moschese V FAU - Rossi, Paolo AU - Rossi P FAU - Roncarolo, Maria Grazia AU - Roncarolo MG FAU - Angelini, Federica AU - Angelini F LA - eng GR - TGT06S01/TI_/Telethon/Italy PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20100211 PL - United States TA - J Allergy Clin Immunol JT - The Journal of allergy and clinical immunology JID - 1275002 RN - 0 (Antigens, Dermatophagoides) RN - 0 (Arthropod Proteins) RN - 0 (Cytokines) RN - 130068-27-8 (Interleukin-10) RN - EC 3.4.22.- (Cysteine Endopeptidases) RN - EC 3.4.22.- (Dermatophagoides pteronyssinus antigen p 1) SB - IM MH - Adolescent MH - Animals MH - Antigens, Dermatophagoides/*immunology MH - Arthropod Proteins MH - Cell Differentiation/*immunology MH - Cell Proliferation MH - Child MH - Child, Preschool MH - Clonal Anergy/immunology MH - Cysteine Endopeptidases MH - Cytokines/biosynthesis MH - Dendritic Cells/cytology/*immunology MH - Female MH - Humans MH - Hypersensitivity/immunology MH - Immune Tolerance/*immunology MH - Interleukin-10/immunology MH - Lymphocyte Activation/immunology MH - Male MH - Pyroglyphidae/immunology MH - T-Lymphocytes, Regulatory/cytology/*immunology EDAT- 2010/02/16 06:00 MHDA- 2010/04/08 06:00 CRDT- 2010/02/16 06:00 PHST- 2009/03/10 00:00 [received] PHST- 2009/11/17 00:00 [revised] PHST- 2009/12/02 00:00 [accepted] PHST- 2010/02/16 06:00 [entrez] PHST- 2010/02/16 06:00 [pubmed] PHST- 2010/04/08 06:00 [medline] AID - S0091-6749(09)01796-5 [pii] AID - 10.1016/j.jaci.2009.12.004 [doi] PST - ppublish SO - J Allergy Clin Immunol. 2010 Mar;125(3):727-36. doi: 10.1016/j.jaci.2009.12.004. Epub 2010 Feb 11.