PMID- 20339029 OWN - NLM STAT- MEDLINE DCOM- 20100518 LR - 20201226 IS - 1095-9203 (Electronic) IS - 0036-8075 (Linking) VI - 328 IP - 5979 DP - 2010 May 7 TI - Induction of lymphoidlike stroma and immune escape by tumors that express the chemokine CCL21. PG - 749-52 LID - 10.1126/science.1185837 [doi] AB - Tumor manipulation of host immunity is important for tumor survival and invasion. Many cancers secrete CCL21, a chemoattractant for various leukocytes and lymphoid tissue inducer cells, which drive lymphoid neogenesis. CCL21 expression by melanoma tumors in mice was associated with an immunotolerant microenvironment, which included the induction of lymphoid-like reticular stromal networks, an altered cytokine milieu, and the recruitment of regulatory leukocyte populations. In contrast, CCL21-deficient tumors induced antigen-specific immunity. CCL21-mediated immune tolerance was dependent on host rather than tumor expression of the CCL21 receptor, CCR7, and could protect distant, coimplanted CCL21-deficient tumors and even nonsyngeneic allografts from rejection. We suggest that by altering the tumor microenvironment, CCL21-secreting tumors shift the host immune response from immunogenic to tolerogenic, which facilitates tumor progression. FAU - Shields, Jacqueline D AU - Shields JD AD - Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne, 1015 Lausanne, Switzerland. FAU - Kourtis, Iraklis C AU - Kourtis IC FAU - Tomei, Alice A AU - Tomei AA FAU - Roberts, Joanna M AU - Roberts JM FAU - Swartz, Melody A AU - Swartz MA LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20100325 PL - United States TA - Science JT - Science (New York, N.Y.) JID - 0404511 RN - 0 (Ccr7 protein, mouse) RN - 0 (Chemokine CCL21) RN - 0 (Cytokines) RN - 0 (Receptors, CCR7) SB - IM CIN - Science. 2010 May 7;328(5979):697-8. PMID: 20448171 MH - Animals MH - Antigen-Presenting Cells/immunology MH - CD8-Positive T-Lymphocytes/immunology MH - Cell Line, Tumor MH - Chemokine CCL21/*metabolism MH - Cytokines/metabolism MH - Disease Progression MH - Female MH - Immune Tolerance MH - Lymph Nodes/immunology MH - Lymphoid Tissue/*immunology/pathology MH - Melanoma, Experimental/*immunology/*pathology MH - Mice MH - Mice, Inbred C57BL MH - Neoplasm Transplantation MH - RNA Interference MH - Receptors, CCR7/metabolism MH - Signal Transduction MH - Stromal Cells/*immunology/pathology MH - T-Lymphocytes/immunology MH - T-Lymphocytes, Regulatory/immunology MH - *Tumor Escape EDAT- 2010/03/27 06:00 MHDA- 2010/05/19 06:00 CRDT- 2010/03/27 06:00 PHST- 2010/03/27 06:00 [entrez] PHST- 2010/03/27 06:00 [pubmed] PHST- 2010/05/19 06:00 [medline] AID - science.1185837 [pii] AID - 10.1126/science.1185837 [doi] PST - ppublish SO - Science. 2010 May 7;328(5979):749-52. doi: 10.1126/science.1185837. Epub 2010 Mar 25.