De Rienzo Assunta, Archer Michael A, Yeap Beow Y, Dao Nhien, Sciaranghella Daniele, Sideris Antonios C, Zheng Yifan, Holman Alexander G, Wang Yaoyu E, Dal Cin Paola S, Fletcher Jonathan A, Rubio Renee, Croft Larry, Quackenbush John, Sugarbaker Peter E, Munir Kiara J, Battilana Jesse R, Gustafson Corinne E, Chirieac Lucian R, Ching Soo Meng, Wong James, Tay Liang Chung, Rudd Stephen, Hercus Robert, Sugarbaker David J, Richards William G, Bueno Raphael
The Thoracic Surgery Oncology laboratory and the International Mesothelioma Program, Division of Thoracic Surgery and the Lung Center, Brigham and Women's Hospital, and Harvard Medical School, Boston, Massachusetts.
Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts.
Cancer Res. 2016 Jan 15;76(2):319-28. doi: 10.1158/0008-5472.CAN-15-0751. Epub 2015 Nov 10.
Malignant pleural mesothelioma (MPM) is an aggressive cancer that occurs more frequently in men, but is associated with longer survival in women. Insight into the survival advantage of female patients may advance the molecular understanding of MPM and identify therapeutic interventions that will improve the prognosis for all MPM patients. In this study, we performed whole-genome sequencing of tumor specimens from 10 MPM patients and matched control samples to identify potential driver mutations underlying MPM. We identified molecular differences associated with gender and histology. Specifically, single-nucleotide variants of BAP1 were observed in 21% of cases, with lower mutation rates observed in sarcomatoid MPM (P < 0.001). Chromosome 22q loss was more frequently associated with the epithelioid than that nonepitheliod histology (P = 0.037), whereas CDKN2A deletions occurred more frequently in nonepithelioid subtypes among men (P = 0.021) and were correlated with shorter overall survival for the entire cohort (P = 0.002) and for men (P = 0.012). Furthermore, women were more likely to harbor TP53 mutations (P = 0.004). Novel mutations were found in genes associated with the integrin-linked kinase pathway, including MYH9 and RHOA. Moreover, expression levels of BAP1, MYH9, and RHOA were significantly higher in nonepithelioid tumors, and were associated with significant reduction in survival of the entire cohort and across gender subgroups. Collectively, our findings indicate that diverse mechanisms highly related to gender and histology appear to drive MPM.
恶性胸膜间皮瘤(MPM)是一种侵袭性癌症,在男性中更常见,但女性患者的生存期更长。深入了解女性患者的生存优势可能会推进对MPM的分子理解,并确定能改善所有MPM患者预后的治疗干预措施。在本研究中,我们对10例MPM患者的肿瘤标本及匹配的对照样本进行了全基因组测序,以确定MPM潜在的驱动突变。我们发现了与性别和组织学相关的分子差异。具体而言,21%的病例中观察到BAP1的单核苷酸变异,肉瘤样MPM中的突变率较低(P<0.001)。22号染色体缺失与上皮样组织学的相关性高于非上皮样组织学(P = 0.037),而CDKN2A缺失在男性的非上皮样亚型中更常见(P = 0.021),并且与整个队列(P = 0.002)以及男性(P = 0.012)的总生存期较短相关。此外,女性更有可能携带TP53突变(P = 0.004)。在与整合素连接激酶途径相关的基因中发现了新的突变,包括MYH9和RHOA。此外,BAP1、MYH9和RHOA的表达水平在非上皮样肿瘤中显著更高,并且与整个队列以及不同性别亚组的生存期显著缩短相关。总体而言,我们的研究结果表明,与性别和组织学高度相关的多种机制似乎驱动着MPM。