PMID- 12112372 OWN - NLM STAT- MEDLINE DCOM- 20020823 LR - 20071115 IS - 0894-1491 (Print) IS - 0894-1491 (Linking) VI - 39 IP - 1 DP - 2002 Jul TI - RANTES stimulates inflammatory cascades and receptor modulation in murine astrocytes. PG - 19-30 AB - Cultured mouse astrocytes respond to the CC chemokine RANTES by production of chemokine and cytokine transcripts. Stimulation of astrocytes with 1 nM RANTES or 3-10 nM of the structurally related chemokines (eotaxin, macrophage inflammatory protein-1alpha and -beta [MIP-1alpha, MIP-1beta]) induced transcripts for KC, monocyte chemoattractant protein-1 (MCP-1), tumor necrosis factor-alpha (TNF-alpha), MIP-1alpha, MIP-2, and RANTES in a chemokine and cell-specific fashion. Synthesis of chemokine (KC and MCP-1) and cytokine (TNF-alpha) proteins was also demonstrated. RANTES-mediated chemokine synthesis was specifically inhibited by pertussis toxin, indicating that G-protein-coupled chemokine receptors participated in astrocyte signaling. Astrocytes expressed CCR1 and CCR5 (the redundant RANTES receptors). Astrocytes derived from mice with targeted mutations of either CCR1 or CCR5 respond after RANTES stimulation, suggesting multiple chemokine receptors may separately mediate RANTES responsiveness in astrocytes. Preliminary data suggest activation of the MAP kinase pathway is also critical for RANTES-mediated signaling in astrocytes. Treatment with RANTES specifically modulated astrocyte receptors upregulating intercellular adhesion molecule 1 (ICAM-1) and downregulating CX3CR1 expression. Thus, after chemokine treatment, astrocytes release proinflammatory mediators and reprogram their surface molecules. The combined effects of RANTES may serve to amplify inflammatory responses within the central nervous system. CI - Copyright 2002 Wiley-Liss, Inc. FAU - Luo, Yi AU - Luo Y AD - Department of Pathology, Harvard Medical School, Boston, Massachusetts 02115, USA. FAU - Berman, Michael A AU - Berman MA FAU - Zhai, Qiwei AU - Zhai Q FAU - Fischer, Falko R AU - Fischer FR FAU - Abromson-Leeman, Sara R AU - Abromson-Leeman SR FAU - Zhang, Ye AU - Zhang Y FAU - Kuziel, William A AU - Kuziel WA FAU - Gerard, Craig AU - Gerard C FAU - Dorf, Martin E AU - Dorf ME LA - eng GR - CA67416/CA/NCI NIH HHS/United States GR - NS37284/NS/NINDS NIH HHS/United States GR - RG2989B3/RG/CSR 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 - Glia JT - Glia JID - 8806785 RN - 0 (Ccl11 protein, mouse) RN - 0 (Chemokine CCL11) RN - 0 (Chemokine CCL5) RN - 0 (Chemokines) RN - 0 (Chemokines, CC) RN - 0 (Cytokines) RN - 0 (Receptors, Chemokine) RN - 0 (Virulence Factors, Bordetella) RN - 126547-89-5 (Intercellular Adhesion Molecule-1) RN - EC 2.4.2.31 (Pertussis Toxin) SB - IM MH - Animals MH - Astrocytes/immunology/*metabolism/*pathology MH - Cells, Cultured MH - Chemokine CCL11 MH - Chemokine CCL5/biosynthesis/*pharmacology MH - Chemokines/biosynthesis/pharmacology MH - Chemokines, CC/pharmacology MH - Cytokines/biosynthesis/pharmacology MH - Inflammation/genetics/immunology/metabolism MH - Intercellular Adhesion Molecule-1/biosynthesis MH - Mice MH - Mice, Inbred BALB C MH - Mice, Knockout MH - Pertussis Toxin MH - Receptors, Chemokine/deficiency/*metabolism MH - Signal Transduction/*immunology MH - Virulence Factors, Bordetella/pharmacology EDAT- 2002/07/12 10:00 MHDA- 2002/08/24 10:01 CRDT- 2002/07/12 10:00 PHST- 2002/07/12 10:00 [pubmed] PHST- 2002/08/24 10:01 [medline] PHST- 2002/07/12 10:00 [entrez] AID - 10.1002/glia.10079 [doi] PST - ppublish SO - Glia. 2002 Jul;39(1):19-30. doi: 10.1002/glia.10079.