PMID- 8335925 OWN - NLM STAT- MEDLINE DCOM- 19930826 LR - 20071114 IS - 0022-1767 (Print) IS - 0022-1767 (Linking) VI - 151 IP - 3 DP - 1993 Aug 1 TI - Characterization of the production of monocyte chemoattractant protein-1 and IL-8 in an allogeneic immune response. PG - 1205-13 AB - Delayed-type hypersensitivity and allograft rejection are dependent upon the generation of Ag-specific T cell immune responses. The mixed lymphocyte reaction is a model of alloantigen-driven immunity and has provided significant insight into the mechanisms of T cell proliferation. Recently, soluble mediators, including TNF-alpha have been shown to be involved in the full expression of this response. In order to elucidate the potential mechanisms of cellular recruitment in the context of either delayed-type hypersensitivity or allograft rejection, we employed a mixed lymphocyte reaction to study the production of chemokines, monocyte chemoattractant protein-1 (MCP-1), and IL-8. Time-course experiments demonstrated that significant levels of MCP-1 and IL-8 were produced in allogeneic cultures as early as day 1, and that this relationship persisted over 6 days in culture. Northern blot analysis of chemokine mRNA confirmed the early induction of these genes in the allogeneic response. The levels of MCP-1 and IL-8 protein from mixed lymphocyte reaction supernatants as measured by specific ELISA were positively correlated with the proliferative response as measured by [3H]TdR uptake. Although significant MCP-1 and IL-8 were produced during a mixed lymphocyte reaction, these molecules did not participate in the proliferative response, as neutralizing antibodies to either MCP-1 or IL-8 had no effect on proliferation. In order to ascertain the mechanism for the induction of MCP-1 and IL-8 during the mixed lymphocyte reaction, experiments were performed in the presence of neutralizing anti-human TNF antibodies. Neutralization of TNF resulted in significant abrogation of MCP-1 and IL-8 production (75 +/- 5 and 87 +/- 2 percent, respectively). Cells isolated from the mixed lymphocyte reaction at day 6, demonstrated that MCP-1 and IL-8 Ag were localized to mononuclear phagocytes. These results demonstrate that potent chemokines, MCP-1 and IL-8, are produced during the evolution of a mixed lymphocyte reaction, and their induction is TNF-dependent. FAU - Christensen, P J AU - Christensen PJ AD - Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor 48109-0360. FAU - Rolfe, M W AU - Rolfe MW FAU - Standiford, T J AU - Standiford TJ FAU - Burdick, M D AU - Burdick MD FAU - Toews, G B AU - Toews GB FAU - Strieter, R M AU - Strieter RM LA - eng GR - 1P50HL46487/HL/NHLBI NIH HHS/United States GR - HL02401/HL/NHLBI NIH HHS/United States GR - HL50057/HL/NHLBI NIH HHS/United States GR - etc. PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. 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 (Chemokine CCL2) RN - 0 (Chemotactic Factors) RN - 0 (Interleukin-8) RN - 0 (Oligodeoxyribonucleotides) RN - 0 (RNA, Messenger) RN - 0 (Tumor Necrosis Factor-alpha) SB - IM GS - IL-8 GS - MCP-1 MH - Base Sequence MH - Chemokine CCL2 MH - Chemotactic Factors/*physiology MH - Gene Expression MH - Humans MH - *Immunity, Cellular MH - Interleukin-8/*physiology MH - Lymphocyte Activation MH - Lymphocyte Culture Test, Mixed MH - Molecular Sequence Data MH - Oligodeoxyribonucleotides/chemistry MH - RNA, Messenger/genetics MH - Tumor Necrosis Factor-alpha/physiology EDAT- 1993/08/01 00:00 MHDA- 1993/08/01 00:01 CRDT- 1993/08/01 00:00 PHST- 1993/08/01 00:00 [pubmed] PHST- 1993/08/01 00:01 [medline] PHST- 1993/08/01 00:00 [entrez] PST - ppublish SO - J Immunol. 1993 Aug 1;151(3):1205-13.