PMID- 14978090 OWN - NLM STAT- MEDLINE DCOM- 20040621 LR - 20190516 IS - 0022-1767 (Print) IS - 0022-1767 (Linking) VI - 172 IP - 5 DP - 2004 Mar 1 TI - A role for Toll-like receptor 4 in dendritic cell activation and cytolytic CD8+ T cell differentiation in response to a recombinant heat shock fusion protein. PG - 2885-93 AB - Recombinant heat shock fusion proteins (Hsfp) injected into mice without added adjuvants can stimulate production of CD8 cytolytic T cells. Because initiation of productive immune responses generally requires dendritic cell (DC) activation, the question arises as to whether the Hsfp can activate DC independently of contaminating LPS. Using microarray analyses of DC from LPS-insensitive mice having a point mutation in Toll-like receptor 4 (Tlr4) (C3H/HeJ), or lacking Tlr4 (B10/ScNCr), we show here that unlike a LPS standard, Hsfp activated DC from HeJ mice almost as well as DC from wild-type mice. Consistent with the microarray analysis, the Hsfp's ability to activate DC was not eliminated by polymyxin B but was destroyed by proteinase K. The Hsfp did not, however, stimulate DC from mice lacking Tlr4. In vivo the CD8 T cell response to the Hsfp in mice lacking Tlr4 was impaired: the responding CD8 cells initially proliferated vigorously but their development into cytolytic effector cells was diminished. Overall, the results indicate that this Hsfp can activate DC independently of LPS but still requires Tlr4 for an optimal CD8 T cell response. FAU - Palliser, Deborah AU - Palliser D AD - Center for Cancer Research and Department of Biology, Massachusetts Institute of Technology and the Whitehead Institute, Cambridge, MA 02139, USA. FAU - Huang, Qian AU - Huang Q FAU - Hacohen, Nir AU - Hacohen N FAU - Lamontagne, Steven P AU - Lamontagne SP FAU - Guillen, Eduardo AU - Guillen E FAU - Young, Richard A AU - Young RA FAU - Eisen, Herman N AU - Eisen HN LA - eng GR - AI-44477/AI/NIAID NIH HHS/United States GR - CA-14051/CA/NCI NIH HHS/United States GR - CA-60686/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Immunol JT - Journal of immunology (Baltimore, Md. : 1950) JID - 2985117R RN - 0 (Bacterial Proteins) RN - 0 (Chaperonin 60) RN - 0 (Lipopolysaccharides) RN - 0 (Membrane Glycoproteins) RN - 0 (Receptors, Cell Surface) RN - 0 (Recombinant Fusion Proteins) RN - 0 (Toll-Like Receptor 4) RN - 0 (Toll-Like Receptors) RN - 0 (heat-shock protein 65, Mycobacterium) RN - EC 3.4.21.64 (Endopeptidase K) RN - EC 3.6.1.- (Chaperonins) RN - J2VZ07J96K (Polymyxin B) SB - IM MH - Animals MH - Bacterial Proteins/administration & dosage/*physiology MH - Cell Differentiation/immunology MH - Chaperonin 60 MH - Chaperonins/administration & dosage/*physiology MH - Cytotoxicity, Immunologic/genetics MH - Dendritic Cells/drug effects/*immunology/*metabolism MH - Dose-Response Relationship, Immunologic MH - Endopeptidase K/pharmacology MH - Gene Expression Profiling MH - Lipopolysaccharides/administration & dosage MH - Lymphocyte Activation/genetics/immunology MH - Membrane Glycoproteins/deficiency/genetics/*physiology MH - Mice MH - Mice, Inbred C3H MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Oligonucleotide Array Sequence Analysis MH - Polymyxin B/pharmacology MH - Receptors, Cell Surface/deficiency/genetics/*physiology MH - Recombinant Fusion Proteins/administration & dosage/*physiology MH - T-Lymphocytes, Cytotoxic/cytology/*immunology/*metabolism MH - Toll-Like Receptor 4 MH - Toll-Like Receptors MH - Up-Regulation/genetics/immunology EDAT- 2004/02/24 05:00 MHDA- 2004/06/23 05:00 CRDT- 2004/02/24 05:00 PHST- 2004/02/24 05:00 [pubmed] PHST- 2004/06/23 05:00 [medline] PHST- 2004/02/24 05:00 [entrez] AID - 10.4049/jimmunol.172.5.2885 [doi] PST - ppublish SO - J Immunol. 2004 Mar 1;172(5):2885-93. doi: 10.4049/jimmunol.172.5.2885.