PMID- 27177223 OWN - NLM STAT- MEDLINE DCOM- 20180116 LR - 20190221 IS - 1949-2553 (Electronic) IS - 1949-2553 (Linking) VI - 7 IP - 25 DP - 2016 Jun 21 TI - Blockade of MCP-1/CCR4 signaling-induced recruitment of activated regulatory cells evokes an antitumor immune response in head and neck squamous cell carcinoma. PG - 37714-37727 LID - 10.18632/oncotarget.9265 [doi] AB - FoxP3+ regulatory T (Treg) cells have diverse functions in the suppression of antitumor immunity. We show that FoxP3hiCD45RA-CD4+ Treg cells [activated Treg (aTreg) cells] are the predominant cell population among tumor-infiltrating FoxP3+ T cells, and that high aTreg cell-infiltrating content is associated with reduced survival in patients with head and neck squamous cell carcinoma (HNSCC). In vitro studies have demonstrated that aTreg cells can suppress tumor-associated antigen (TAA) effector T cell immune responses in HNSCC. Moreover, C-C chemokine receptor 4 (CCR4) was specifically expressed by aTreg cells in the peripheral blood of HNSCC patients. Using a RayBiotech human chemokine antibody array, we showed that monocyte chemoattractant protein-1 (MCP-1), an endogenous CCR4-binding ligand, was specifically upregulated in the HNSCC microenvironment compared to the other four CCR4-binding ligands. Blocking MCP-1/CCR4 signaling-induced aTreg cell recruitment using a CCR4 antagonist evoked antitumor immunity in mice, and lead to inhibition of tumor growth and prolonged survival. Therefore, blocking aTreg cell trafficking in tumors using CCR4-binding agents may be an effective immunotherapy for HNSCC. FAU - Sun, Wei AU - Sun W AD - Department of Otorhinolaryngology-Head and Neck Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China. AD - Institute of Otorhinolaryngology-Head and Neck Surgery, Sun Yat-sen University, Guangzhou, China. FAU - Li, Wei-Jin AU - Li WJ AD - Department of Otorhinolaryngology-Head and Neck Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China. AD - Institute of Otorhinolaryngology-Head and Neck Surgery, Sun Yat-sen University, Guangzhou, China. FAU - Wei, Fan-Qin AU - Wei FQ AD - Department of Otorhinolaryngology-Head and Neck Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China. AD - Institute of Otorhinolaryngology-Head and Neck Surgery, Sun Yat-sen University, Guangzhou, China. AD - Department of Otorhinolaryngology-Head and Neck Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China. FAU - Wong, Thian-Sze AU - Wong TS AD - Department of Surgery, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China. FAU - Lei, Wen-Bin AU - Lei WB AD - Department of Otorhinolaryngology-Head and Neck Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China. AD - Institute of Otorhinolaryngology-Head and Neck Surgery, Sun Yat-sen University, Guangzhou, China. FAU - Zhu, Xiao-Lin AU - Zhu XL AD - Department of Otorhinolaryngology-Head and Neck Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China. AD - Institute of Otorhinolaryngology-Head and Neck Surgery, Sun Yat-sen University, Guangzhou, China. FAU - Li, Jian AU - Li J AD - Department of Otorhinolaryngology-Head and Neck Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China. AD - Institute of Otorhinolaryngology-Head and Neck Surgery, Sun Yat-sen University, Guangzhou, China. FAU - Wen, Wei-Ping AU - Wen WP AD - Department of Otorhinolaryngology-Head and Neck Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China. AD - Institute of Otorhinolaryngology-Head and Neck Surgery, Sun Yat-sen University, Guangzhou, China. LA - eng PT - Journal Article PL - United States TA - Oncotarget JT - Oncotarget JID - 101532965 RN - 0 (Antigens, Neoplasm) RN - 0 (Antineoplastic Agents) RN - 0 (CCL2 protein, human) RN - 0 (CCR4 protein, human) RN - 0 (Chemokine CCL2) RN - 0 (FOXP3 protein, human) RN - 0 (Forkhead Transcription Factors) RN - 0 (Receptors, CCR4) RN - EC 3.1.3.48 (Leukocyte Common Antigens) SB - IM MH - Aged MH - Animals MH - Antigens, Neoplasm/metabolism MH - Antineoplastic Agents/*pharmacology MH - CD4-Positive T-Lymphocytes/cytology MH - Carcinoma, Squamous Cell/*drug therapy/*immunology/therapy MH - Chemokine CCL2/*antagonists & inhibitors MH - Female MH - Forkhead Transcription Factors/metabolism MH - Head and Neck Neoplasms/*drug therapy/*immunology/therapy MH - Humans MH - Immune System MH - Leukocyte Common Antigens/metabolism MH - Leukocytes, Mononuclear/cytology MH - Lymphocytes, Tumor-Infiltrating/cytology MH - Male MH - Mice MH - Mice, Inbred C3H MH - Middle Aged MH - Neoplasm Transplantation MH - Prognosis MH - Receptors, CCR4/*antagonists & inhibitors MH - Signal Transduction MH - Squamous Cell Carcinoma of Head and Neck PMC - PMC5122343 OTO - NOTNLM OT - CCR4 OT - Treg OT - antitumor immunity OT - head and neck squamous cell carcinoma OT - prognosis COIS- The authors declare that there are no conflicts of interest. EDAT- 2016/10/23 06:00 MHDA- 2018/01/18 06:00 PMCR- 2016/06/21 CRDT- 2016/05/14 06:00 PHST- 2016/01/28 00:00 [received] PHST- 2016/04/26 00:00 [accepted] PHST- 2016/10/23 06:00 [pubmed] PHST- 2018/01/18 06:00 [medline] PHST- 2016/05/14 06:00 [entrez] PHST- 2016/06/21 00:00 [pmc-release] AID - 9265 [pii] AID - 10.18632/oncotarget.9265 [doi] PST - ppublish SO - Oncotarget. 2016 Jun 21;7(25):37714-37727. doi: 10.18632/oncotarget.9265.