PMID- 27083941 OWN - NLM STAT- MEDLINE DCOM- 20160905 LR - 20160416 IS - 1095-8673 (Electronic) IS - 0022-4804 (Linking) VI - 202 IP - 1 DP - 2016 May 1 TI - Enhanced tumor growth in the remaining lung after major lung resection. PG - 1-7 LID - S0022-4804(15)01184-1 [pii] LID - 10.1016/j.jss.2015.12.012 [doi] AB - BACKGROUND: Pneumonectomy induces active growth of the remaining lung in order to compensate for lost lung tissue. We hypothesized that tumor progression is enhanced in the activated local environment. METHODS: We examined the effects of mechanical strain on the activation of lung growth and tumor progression in mice. The mechanical strain imposed on the right lung after left pneumonectomy was neutralized by filling the empty space that remained after pneumonectomy with a polypropylene prosthesis. RESULTS: The neutralization of the strain prevented active lung growth. According to an angiogenesis array, stronger monocyte chemoattractant protein-1 (MCP-1) expression was found in the strain-induced growing lung. The neutralization of the strain attenuated the release of MCP-1 from the lung cells. The intravenous injection of Lewis lung cancer cells resulted in the enhanced development of metastatic foci in the strain-induced growing lung, but the enhanced development was canceled by the neutralization of the strain. An immunohistochemical analysis revealed the prominent accumulation of tumor-associated macrophages in tumors arising in the strain-induced growing lung, and that there was a relationship between the accumulation and the MCP-1 expression status. CONCLUSIONS: Our results suggested that mechanical lung strain, induced by pulmonary resection, triggers active lung growth, thereby creating a tumor-friendly environment. The modification of that environment, as well as the minimizing of surgical stress, may be a meaningful strategy to improve the therapeutic outcome after lung cancer surgery. CI - Copyright (c) 2016 Elsevier Inc. All rights reserved. FAU - Sano, Fumiho AU - Sano F AD - Department of Surgery and Clinical Science, Division of Chest Surgery, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan. FAU - Ueda, Kazuhiro AU - Ueda K AD - Department of Surgery and Clinical Science, Division of Chest Surgery, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan. Electronic address: kaueda@c-able.ne.jp. FAU - Murakami, Junichi AU - Murakami J AD - Department of Surgery and Clinical Science, Division of Chest Surgery, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan. FAU - Hayashi, Masataro AU - Hayashi M AD - Department of Surgery and Clinical Science, Division of Chest Surgery, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan. FAU - Nishimoto, Arata AU - Nishimoto A AD - Department of Surgery and Clinical Science, Division of Chest Surgery, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan. FAU - Hamano, Kimikazu AU - Hamano K AD - Department of Surgery and Clinical Science, Division of Chest Surgery, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20151217 PL - United States TA - J Surg Res JT - The Journal of surgical research JID - 0376340 RN - 0 (Biomarkers, Tumor) RN - 0 (Chemokine CCL2) SB - IM MH - Animals MH - Biomarkers, Tumor/metabolism MH - Carcinoma, Lewis Lung/metabolism/pathology/*surgery MH - Chemokine CCL2/metabolism MH - Lung/growth & development/metabolism/*pathology/surgery MH - Lung Neoplasms/metabolism/pathology/*surgery MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Pneumonectomy/*adverse effects/methods MH - Prostheses and Implants MH - Tumor Microenvironment OTO - NOTNLM OT - Compensatory lung growth OT - Lung cancer OT - Microenvironment OT - Monocyte chemoattractant protein-1 OT - Pulmonary resection EDAT- 2016/04/17 06:00 MHDA- 2016/09/07 06:00 CRDT- 2016/04/17 06:00 PHST- 2015/09/23 00:00 [received] PHST- 2015/11/27 00:00 [revised] PHST- 2015/12/11 00:00 [accepted] PHST- 2016/04/17 06:00 [entrez] PHST- 2016/04/17 06:00 [pubmed] PHST- 2016/09/07 06:00 [medline] AID - S0022-4804(15)01184-1 [pii] AID - 10.1016/j.jss.2015.12.012 [doi] PST - ppublish SO - J Surg Res. 2016 May 1;202(1):1-7. doi: 10.1016/j.jss.2015.12.012. Epub 2015 Dec 17.