PMID- 31641796 OWN - NLM STAT- MEDLINE DCOM- 20191202 LR - 20240426 IS - 1432-0851 (Electronic) IS - 0340-7004 (Print) IS - 0340-7004 (Linking) VI - 68 IP - 12 DP - 2019 Dec TI - Autophagy inhibition induces the repolarisation of tumour-associated macrophages and enhances chemosensitivity of laryngeal cancer cells to cisplatin in mice. PG - 1909-1920 LID - 10.1007/s00262-019-02415-8 [doi] AB - Tumour-associated macrophages (TAMs) are the key components in the tumour microenvironment. TAMs have two major subtypes, M1 and M2. M1 macrophages are tumour inhibitory, while M2 macrophages are tumour promotive. Repolarising TAMs from M2 to M1 is a promising strategy in cancer treatment. M1 and M2 macrophages were generated from murine bone marrow-derived macrophages (BMDMs). We found that chloroquine (CQ), an autophagy inhibitor, was able to repolarise M2 macrophages to the anti-tumour M1 phenotype. The repolarised macrophages demonstrated higher phagocytotic activity towards Hep-2 laryngeal tumour cells and re-sensitised Hep-2 cells to cisplatin (CDDP) treatment in vitro. While CQ did not demonstrate cytotoxicity to Hep-2 cells in vitro, CQ treatment reduced Hep-2 laryngeal tumour growth in vivo and improved CDDP treatment outcomes. It seems that CQ-induced M2-to-M1 macrophage repolarisation played an important role in tumour growth inhibition, and the CQ/CDDP combined therapy might have clinical potential in laryngeal cancer treatment. FAU - Guo, Ying AU - Guo Y AD - Department of Otorhinolaryngology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, 250014, Shandong, China. FAU - Feng, Yufang AU - Feng Y AD - Department of Otorhinolaryngology, Weifang Yidu Central Hospital, Weifang, 262500, Shandong, China. FAU - Cui, Xinhua AU - Cui X AD - Department of Otorhinolaryngology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, 250014, Shandong, China. FAU - Wang, Qirong AU - Wang Q AD - Department of Otorhinolaryngology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, 250014, Shandong, China. FAU - Pan, Xinliang AU - Pan X AD - Department of Otorhinolaryngology, Qilu Hospital, Shandong University, No. 107, Wenhua West Road, Jinan, 250012, Shandong, China. panxinlent@163.com. LA - eng GR - 2017WSB04024/Project of Medical and Health Technology Development Program in Shandong/ PT - Journal Article DEP - 20191022 PL - Germany TA - Cancer Immunol Immunother JT - Cancer immunology, immunotherapy : CII JID - 8605732 RN - 0 (Cytokines) RN - 886U3H6UFF (Chloroquine) RN - Q20Q21Q62J (Cisplatin) SB - IM MH - Animals MH - Antineoplastic Combined Chemotherapy Protocols/*therapeutic use MH - Autophagy MH - Cell Line, Tumor MH - Cell Proliferation MH - Cell Transdifferentiation MH - Chloroquine/pharmacology MH - Cisplatin/*therapeutic use MH - Cytokines/metabolism MH - Drug Resistance, Neoplasm MH - Laryngeal Neoplasms/drug therapy/*immunology MH - Macrophages/*physiology MH - Mice MH - Mice, Inbred C57BL MH - Mice, Nude MH - Th1 Cells/immunology MH - Th2 Cells/immunology PMC - PMC11028258 OTO - NOTNLM OT - Autophagy inhibition OT - Chloroquine (CQ) OT - Hep-2 laryngeal cancer OT - Macrophage repolarisation OT - Tumour-associated macrophages (TAMs) COIS- The authors declare that they have no conflict of interest. EDAT- 2019/10/24 06:00 MHDA- 2019/12/04 06:00 PMCR- 2019/10/22 CRDT- 2019/10/24 06:00 PHST- 2019/04/01 00:00 [received] PHST- 2019/10/10 00:00 [accepted] PHST- 2019/10/24 06:00 [pubmed] PHST- 2019/12/04 06:00 [medline] PHST- 2019/10/24 06:00 [entrez] PHST- 2019/10/22 00:00 [pmc-release] AID - 10.1007/s00262-019-02415-8 [pii] AID - 2415 [pii] AID - 10.1007/s00262-019-02415-8 [doi] PST - ppublish SO - Cancer Immunol Immunother. 2019 Dec;68(12):1909-1920. doi: 10.1007/s00262-019-02415-8. Epub 2019 Oct 22.