PMID- 31600692 OWN - NLM STAT- MEDLINE DCOM- 20200317 LR - 20200317 IS - 1878-1705 (Electronic) IS - 1567-5769 (Linking) VI - 76 DP - 2019 Nov TI - BET bromodomain inhibitor JQ1 promotes immunogenic cell death in tongue squamous cell carcinoma. PG - 105921 LID - S1567-5769(19)31407-9 [pii] LID - 10.1016/j.intimp.2019.105921 [doi] AB - Drug resistance substantially limits the curative capability of chemotherapy in head and neck cancers such as oral squamous cell carcinoma. Immunosuppression is considered a potential cause of drug resistance. A key discovery in the past decade is that chemotherapeutics can alter tumor cell immunogenicity via inducing release of damage-associated molecular patterns (DAMPs), including ecto-calreticulin (ecto-CALR), high mobility group box 1 (HMGB1) and ATP, causing tumor cells to die in a manner known as bona fide immunogenic apoptosis or immunogenic cell death (ICD). Intriguingly, JQ1 was found in this study to exhibit therapeutic potential in tongue squamous cell carcinoma (TSCC) by inducing ICD. JQ1 induced significant release of calreticulin (CALR), HMGB1 and ATP from Cal27 and SCC7 cells in vitro. Immature dendritic cells (Im-DCs) cocultured with JQ1-pretreated Cal27 cells exhibited significant upregulation of mature markers on their surface and an increase in the secretion of cytokines. In vivo experiments demonstrated that JQ1-pretreated dying SCC7 cells protected immunocompetent mice from rechallenge of SCC7 cells. Intravenous injection of JQ1 efficiently reduced tumor growth and increased tumor-infiltration of CD3(+)/CD8(+) T cells in C3H mice. CI - Copyright (c) 2019 Elsevier B.V. All rights reserved. FAU - Wang, Miao AU - Wang M AD - Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan, Shandong Province, China; Department of Oral and Maxillofacial Surgery, School of Stomatology, Shandong University, Jinan, Shandong Province, China. FAU - Zhao, Lu AU - Zhao L AD - Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan, Shandong Province, China; .Department of Stomatology, Binzhou People's Hospital, Binzhou, Shandong Province, China. FAU - Tong, Dongdong AU - Tong D AD - Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan, Shandong Province, China; Department of Oral and Maxillofacial Surgery, School of Stomatology, Shandong University, Jinan, Shandong Province, China. FAU - Yang, Linrui AU - Yang L AD - Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan, Shandong Province, China; Department of Oral and Maxillofacial Surgery, School of Stomatology, Shandong University, Jinan, Shandong Province, China. FAU - Zhu, Hongjie AU - Zhu H AD - Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan, Shandong Province, China; Department of Oral and Maxillofacial Surgery, School of Stomatology, Shandong University, Jinan, Shandong Province, China. FAU - Li, Qing AU - Li Q AD - Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan, Shandong Province, China; Department of Oral and Maxillofacial Surgery, School of Stomatology, Shandong University, Jinan, Shandong Province, China. FAU - Zhang, Fenghe AU - Zhang F AD - Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan, Shandong Province, China; Department of Oral and Maxillofacial Surgery, School of Stomatology, Shandong University, Jinan, Shandong Province, China. Electronic address: zfengh@sdu.edu.cn. LA - eng PT - Journal Article DEP - 20191007 PL - Netherlands TA - Int Immunopharmacol JT - International immunopharmacology JID - 100965259 RN - 0 ((+)-JQ1 compound) RN - 0 (Antineoplastic Agents) RN - 0 (Azepines) RN - 0 (BRD4 protein, human) RN - 0 (Brd4 protein, mouse) RN - 0 (Cell Cycle Proteins) RN - 0 (Cytokines) RN - 0 (HMGB1 Protein) RN - 0 (Nuclear Proteins) RN - 0 (Transcription Factors) RN - 0 (Triazoles) SB - IM MH - Animals MH - Antineoplastic Agents/pharmacology/*therapeutic use MH - Apoptosis/drug effects MH - Azepines/pharmacology/*therapeutic use MH - Carcinoma, Squamous Cell/*drug therapy/immunology/pathology MH - Cell Cycle Proteins/*antagonists & inhibitors/genetics MH - Cell Death/drug effects MH - Cell Line, Tumor MH - Cell Proliferation/drug effects MH - Coculture Techniques MH - Cytokines/immunology MH - Dendritic Cells/drug effects/immunology MH - Female MH - HMGB1 Protein/metabolism MH - Humans MH - Mice, Inbred C3H MH - Mice, Nude MH - Nuclear Proteins/*antagonists & inhibitors/genetics MH - T-Lymphocytes/drug effects/immunology MH - Tongue Neoplasms/*drug therapy/immunology/pathology MH - Transcription Factors/*antagonists & inhibitors/genetics MH - Triazoles/pharmacology/*therapeutic use OTO - NOTNLM OT - BET inhibitor OT - Immunogenic cell death OT - JQ1 OT - Tongue squamous cell carcinoma OT - p-eIF2a EDAT- 2019/10/11 06:00 MHDA- 2020/03/18 06:00 CRDT- 2019/10/11 06:00 PHST- 2019/06/29 00:00 [received] PHST- 2019/09/15 00:00 [revised] PHST- 2019/09/15 00:00 [accepted] PHST- 2019/10/11 06:00 [pubmed] PHST- 2020/03/18 06:00 [medline] PHST- 2019/10/11 06:00 [entrez] AID - S1567-5769(19)31407-9 [pii] AID - 10.1016/j.intimp.2019.105921 [doi] PST - ppublish SO - Int Immunopharmacol. 2019 Nov;76:105921. doi: 10.1016/j.intimp.2019.105921. Epub 2019 Oct 7.