Open AccessAssociation of Mps one binder kinase activator 1 ( MOB1) expression with poor disease‐free survival in individuals with non‐small cell lung cancer
Author(s) -
Ando Nobuhisa,
Tanaka Kentaro,
Otsubo Kohei,
Toyokawa Gouji,
Ikematsu Yuki,
Ide Maako,
Yoneshima Yasuto,
Iwama Eiji,
Inoue Hiroyuki,
Ijichi Kayo,
Tagawa Tetsuzo,
Nakanishi Yoichi,
Okamoto Isamu
Publication year - 2020
Publication title -
thoracic cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.823
H-Index - 28
eISSN - 1759-7714
pISSN - 1759-7706
DOI - 10.1111/1759-7714.13608
Subject(s) - gene knockdown , medicine , lung cancer , cancer research , immunohistochemistry , in vitro , adenocarcinoma , oncology , cancer , pathology , cell culture , biology , biochemistry , genetics
Background Mps one binder kinase activator 1 (MOB1) is a core component of the Hippo signaling pathway and has been implicated as a tumor suppressor. Here, we evaluated the possible relationship of MOB1 expression in non‐small cell lung cancer (NSCLC) to prognosis. Methods We retrospectively analyzed 205 lung adenocarcinoma patients treated at Kyushu University Hospital between November 2007 and October 2012. MOB1 expression in tumor cells of surgical specimens was evaluated by immunohistochemistry. Invasive activity of NSCLC cell lines in vitro was measured with a transwell assay. Results Expression of MOB1 was classified as high in 105 of the 205 (51.2%) tumor specimens, and such high expression was significantly associated with poor disease‐free survival ( P = 0.0161). Among the various clinicopathologic parameters examined, high MOB1 expression was significantly associated only with intratumoral vascular invasion ( P = 0.0005). Multivariate analysis also identified high MOB1 expression as a significant independent risk factor for disease‐free survival ( P = 0.0319). The invasiveness of H1299 cells in vitro was increased or attenuated by overexpression or knockdown of MOB1, respectively. Conclusions Our results suggest that MOB1 might promote early recurrence of NSCLC by increasing vascular invasion by tumor cells. Key points Significant findings of the study We found that high MOB1 expression in surgical specimens of lung adenocarcinoma was associated with poor disease‐free survival and with intratumoral vascular invasion. MOB1 expression also promoted the invasiveness of NSCLC cells in vitro. What this study adds Our results thus suggest that high MOB1 expression is a risk factor for early postoperative recurrence in lung adenocarcinoma.