PMID- 26245309 OWN - NLM STAT- MEDLINE DCOM- 20160602 LR - 20211203 IS - 1440-1843 (Electronic) IS - 1323-7799 (Linking) VI - 20 IP - 8 DP - 2015 Nov TI - Temsirolimus targets multiple hallmarks of cancer to impede mesothelioma growth in vivo. PG - 1263-71 LID - 10.1111/resp.12604 [doi] AB - BACKGROUND AND OBJECTIVE: The mechanistic target of rapamycin (mTOR) promotes cancer cell proliferation and survival, transduces pro-angiogenic signals and regulates immune cell differentiation and function. We hypothesized that temsirolimus, an mTOR inhibitor, would curtail experimental mesothelioma progression in vivo by limiting tumour cell growth, abrogating tumour angiogenesis and modulating immune/inflammatory tumour milieu. METHODS: We produced flank and pleural syngeneic murine mesotheliomas by delivering AE17 and AB1 murine mesothelioma cells into the right flank or the pleural space of C57BL/6 and BALB/c mice, respectively. Animals were given five times/week intraperitoneal injections of 20 mg/kg temsirolimus or vehicle and were sacrificed on day 26 (flank) or on day 15 (pleural) post-tumour cell propagation. RESULTS: Temsirolimus limited mesothelioma growth in vivo by stimulating tumour cell apoptosis, inhibiting tumour angiogenesis, enhancing tumour lymphocyte abundance and blocking pro-tumour myeloid cell recruitment. Pleural fluid accumulation was significantly mitigated in AE17 but not in AB1 mesotheliomas. In vitro, temsirolimus hindered mesothelioma cell growth, NF-kappaB activation and macrophage migration. CONCLUSIONS: In conclusion, temsirolimus apart from inducing tumour cell apoptosis, targets tumour angiogenesis and influences inflammatory tumour microenvironment to halt experimental mesothelioma growth in vivo. CI - (c) 2015 Asian Pacific Society of Respirology. FAU - Vazakidou, Maria Eleni AU - Vazakidou ME AD - 'Marianthi Simou Laboratory', 1st Department of Critical Care and Pulmonary Medicine, National and Kapodistrian University of Athens, School of Medicine, Evangelismos Hospital, Athens, Greece. FAU - Magkouta, Sophia AU - Magkouta S AD - 'Marianthi Simou Laboratory', 1st Department of Critical Care and Pulmonary Medicine, National and Kapodistrian University of Athens, School of Medicine, Evangelismos Hospital, Athens, Greece. FAU - Moschos, Charalampos AU - Moschos C AD - 'Marianthi Simou Laboratory', 1st Department of Critical Care and Pulmonary Medicine, National and Kapodistrian University of Athens, School of Medicine, Evangelismos Hospital, Athens, Greece. FAU - Psallidas, Ioannis AU - Psallidas I AD - 'Marianthi Simou Laboratory', 1st Department of Critical Care and Pulmonary Medicine, National and Kapodistrian University of Athens, School of Medicine, Evangelismos Hospital, Athens, Greece. AD - Oxford Centre for Respiratory Medicine, Churchill Hospital, Oxford, UK. AD - Oxford Respiratory Trials Unit, Churchill Hospital, Oxford, UK. FAU - Pappas, Apostolos AU - Pappas A AD - 'Marianthi Simou Laboratory', 1st Department of Critical Care and Pulmonary Medicine, National and Kapodistrian University of Athens, School of Medicine, Evangelismos Hospital, Athens, Greece. FAU - Psarra, Katherina AU - Psarra K AD - Department of Immunology-Histocompatibility, Evangelismos Hospital, Athens, Greece. FAU - Kalomenidis, Ioannis AU - Kalomenidis I AD - 'Marianthi Simou Laboratory', 1st Department of Critical Care and Pulmonary Medicine, National and Kapodistrian University of Athens, School of Medicine, Evangelismos Hospital, Athens, Greece. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150805 PL - Australia TA - Respirology JT - Respirology (Carlton, Vic.) JID - 9616368 RN - 0 (Antineoplastic Agents) RN - 0 (NF-kappa B) RN - 624KN6GM2T (temsirolimus) RN - EC 2.7.1.1 (mTOR protein, mouse) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Animals MH - Antineoplastic Agents/pharmacology/*therapeutic use MH - Apoptosis/drug effects MH - Cell Line, Tumor MH - Cell Movement/drug effects MH - Cell Proliferation/drug effects MH - Lung Neoplasms/*drug therapy MH - Mesothelioma/*drug therapy MH - Mesothelioma, Malignant MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - NF-kappa B/metabolism MH - Neovascularization, Pathologic/prevention & control MH - Pleural Neoplasms/*drug therapy MH - Signal Transduction MH - Sirolimus/*analogs & derivatives/pharmacology/therapeutic use MH - TOR Serine-Threonine Kinases MH - Tumor Microenvironment/drug effects/immunology OTO - NOTNLM OT - mechanistic target of rapamycin OT - mesothelioma OT - pleural effusion OT - temsirolimus OT - tumour EDAT- 2015/08/08 06:00 MHDA- 2016/06/03 06:00 CRDT- 2015/08/07 06:00 PHST- 2015/02/19 00:00 [received] PHST- 2015/04/16 00:00 [revised] PHST- 2015/05/03 00:00 [accepted] PHST- 2015/08/07 06:00 [entrez] PHST- 2015/08/08 06:00 [pubmed] PHST- 2016/06/03 06:00 [medline] AID - 10.1111/resp.12604 [doi] PST - ppublish SO - Respirology. 2015 Nov;20(8):1263-71. doi: 10.1111/resp.12604. Epub 2015 Aug 5.