PMID- 11962737 OWN - NLM STAT- MEDLINE DCOM- 20021125 LR - 20191105 IS - 1567-5769 (Print) IS - 1567-5769 (Linking) VI - 2 IP - 4 DP - 2002 Mar TI - Effect of liposomal antigens on the priming and activation of the immune system by dendritic cells. PG - 591-601 AB - Dendritic cells (DCs) are recognized as the sole professional antigen-presenting cells capable of priming naive T cells of the helper and cytotoxic phenotypes. This property is presently exploited with success in vaccinal strategies against pathogens or tumor cells that otherwise escape immune recognition, but the repeated infusions of ex vivo expanded and sensitized DCs are usually required to achieve protection. In this paper, we demonstrate that liposomal antigens can efficiently relay and propagate the action of DCs, inducing a strong long-term response against their associated antigen. Their effect is mainly achieved by improving the ex vivo loading of DCs and by efficiently channeling the activation stimulus into the induction of effector function. This is demonstrated by the sustained immunoglobulin production as well as by the sustained lymphoproliferation and the increased cytokine secretion that can be achieved upon restimulation of DC-primed immune cells with limited amount of liposomal antigenic material. Being well-tolerated and easily prepared, liposomal antigens could therefore be expected to significantly contribute to the efficiency and to a more general utilization of the highly promising but rather cumbersome DC-based immunotherapies. FAU - Shahum, Eliane AU - Shahum E AD - Groupe de Recherche en Biologie Medicale, Departement de Chimie-Biologie, Universite du Quebec a Trois-Rivieres, Three Rivers, Canada. FAU - Therien, Helene-Marie AU - Therien HM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Int Immunopharmacol JT - International immunopharmacology JID - 100965259 RN - 0 (Antibodies) RN - 0 (Antigens) RN - 0 (Liposomes) RN - 130068-27-8 (Interleukin-10) RN - 187348-17-0 (Interleukin-12) SB - IM MH - Animals MH - Antibodies/*immunology MH - Antigens/*administration & dosage/*immunology MH - Dendritic Cells/*immunology MH - Immunization MH - Interleukin-10/analysis MH - Interleukin-12/analysis MH - *Liposomes MH - *Lymphocyte Activation MH - Mice MH - Mice, Inbred AKR MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Spleen/cytology/immunology EDAT- 2002/04/19 10:00 MHDA- 2002/11/26 04:00 CRDT- 2002/04/19 10:00 PHST- 2002/04/19 10:00 [pubmed] PHST- 2002/11/26 04:00 [medline] PHST- 2002/04/19 10:00 [entrez] AID - S1567-5769(02)00004-8 [pii] AID - 10.1016/s1567-5769(02)00004-8 [doi] PST - ppublish SO - Int Immunopharmacol. 2002 Mar;2(4):591-601. doi: 10.1016/s1567-5769(02)00004-8.