PMID- 12560234 OWN - NLM STAT- MEDLINE DCOM- 20030819 LR - 20210206 IS - 0006-4971 (Print) IS - 0006-4971 (Linking) VI - 102 IP - 1 DP - 2003 Jul 1 TI - Intranodal injection of semimature monocyte-derived dendritic cells induces T helper type 1 responses to protein neoantigen. PG - 36-42 AB - Dendritic cells (DCs) represent the most potent antigen-presenting cells of the immune system capable of initiating primary immune responses to neoantigens. Here we characterize the primary CD4 T-cell immune response to protein keyhole limpet hemocyanin (KLH) in 5 metastatic melanoma patients undergoing a tumor peptide-based dendritic cell vaccination trial. Monocyte-derived dendritic cells displaying a semimature phenotype, as defined by surface markers, were loaded ex vivo with antigen and injected intranodally at weekly intervals for 4 weeks. All patients developed a strong and long-lasting delayed-type hypersensitivity reactivity to KLH, which correlated with the induction of KLH-dependent proliferation of CD4 T cells in vitro. Secondary in vitro stimulation with KLH showed significant increase in interferon-gamma and interleukin-2 (IL-2) but not IL-4, IL-5, nor IL-10 secretion by bulk T cells. On the single-cell level, most TH1 cells among in vitro-generated KLH-specific T-cell lines confirmed the preferential induction of a KLH-specific type 1 T helper immune response. Furthermore, the induction of KLH-specific antibodies of the IgG2 subtype may reflect the induction of a type 1 cytokine profile in vivo after vaccination. Our results indicate that intranodal vaccination with semimature DCs can prime strong, long-lasting CD4 T-cell responses with a TH1-type cytokine profile in cancer patients. FAU - Gilliet, Michel AU - Gilliet M AD - Department of Dermatology, University of Zurich, Gloriastrasse 31, 8091 Zurich, Switzerland. FAU - Kleinhans, Martin AU - Kleinhans M FAU - Lantelme, Erica AU - Lantelme E FAU - Schadendorf, Dirk AU - Schadendorf D FAU - Burg, Gunter AU - Burg G FAU - Nestle, Frank O AU - Nestle FO LA - eng PT - Journal Article DEP - 20030130 PL - United States TA - Blood JT - Blood JID - 7603509 RN - 0 (Antigens, Neoplasm) RN - 0 (Cytokines) RN - 9013-72-3 (Hemocyanins) RN - FV4Y0JO2CX (keyhole-limpet hemocyanin) SB - IM MH - Antibody Formation MH - Antigens, Neoplasm/immunology MH - Cell Culture Techniques/methods MH - Cytokines/biosynthesis MH - Dendritic Cells/cytology/*immunology/*transplantation MH - Hemocyanins/immunology MH - Humans MH - Hypersensitivity, Delayed MH - Immunity, Cellular MH - Immunotherapy, Adoptive/*methods MH - Injections, Intralymphatic MH - Lymphocyte Activation MH - Melanoma/pathology/*therapy MH - Monocytes/cytology MH - T-Lymphocytes/immunology MH - Th1 Cells/*immunology EDAT- 2003/02/01 04:00 MHDA- 2003/08/20 05:00 CRDT- 2003/02/01 04:00 PHST- 2003/02/01 04:00 [pubmed] PHST- 2003/08/20 05:00 [medline] PHST- 2003/02/01 04:00 [entrez] AID - S0006-4971(20)53973-6 [pii] AID - 10.1182/blood-2002-07-2274 [doi] PST - ppublish SO - Blood. 2003 Jul 1;102(1):36-42. doi: 10.1182/blood-2002-07-2274. Epub 2003 Jan 30.