Lung Adenocarcinoma Invasion Genomics

描述(由申请人提供)：我们的项目集中于描述肺腺癌侵袭获得的重要分子机制。我们的研究集中于表征侵袭的重要分子机制，侵袭是转移的初始步骤。我们小组和其他人的研究表明，早期肺腺癌患者的临床结果受到组织学侵袭性的影响。随着我们看到肺癌流行病学向早期(在某些情况下还不是侵袭性疾病)的转变，破译获得侵袭性的分子过程有望具有越来越重要的意义。对这些肿瘤生物学特性的了解将加强早期肺癌的临床治疗，包括指导小肺腺癌肿瘤的切除范围。我们的数据集丰富了早期非侵袭性腺癌(AIS，以前称为BAC)肿瘤，这些肿瘤在基因组学库中没有很好地代表，如癌症基因组图谱(TCGA)。我们对肿瘤细胞的初步基因表达谱结果表明，局灶性染色体拷贝数增加在介导肺腺癌侵袭性获得中起重要作用。这一创新发现是这个多学科、多机构项目的重点，该项目旨在扩大我们对局灶性体细胞拷贝数变化的基因组学检查，检查基质对侵袭的影响，调查基因扩增的诊断和治疗意义，并了解抑制AIS侵袭和促进腺癌侵袭的机制。利用特征明确的肺腺癌样本，我们将使用RNA和DNA微阵列、全外显子组测序和荧光原位杂交来验证这样的假设，即拷贝数和mRNA水平的整合改变对于获得肺腺癌的侵袭和转移能力是重要的。在切除的标本中验证后，这些基因座将在切除的肿瘤标本和早期肺腺癌肿瘤的细针抽吸物中进行前瞻性临床测试。我们的长期目标是开发生物标记物，将肿瘤切除前或切除后的风险分层，分别在放射学或组织学上是同质的。

DESCRIPTION (provided by applicant): Our project focuses on characterizing the molecular mechanisms important for the acquisition of invasion in lung adenocarcinoma. Our research has focused on characterizing the molecular mechanisms important for invasion, the initial step of metastasis. Studies from our group and others indicate that clinical outcomes for patients with early stage lung adenocarcinoma are influenced by histological invasiveness. Deciphering the molecular processes underlying the acquisition of invasiveness promises to have increasing importance as we see a shift in the epidemiology of lung cancer towards early, and in some cases, not yet invasive disease. An improved understanding of the biological properties of these tumors will enhance the clinical management of early stage lung cancer, including directing the extent of resection for small lung adenocarcinoma tumors. Our dataset is enriched for early stage non-invasive adenocarcinoma (AIS, formerly called BAC) tumors that are not well represented in genomics repositories such as The Cancer Genome Atlas (TCGA). Our preliminary gene expression profiling results from tumor cells suggest that focal chromosomal copy number increase is important in mediating the acquisition of invasion in lung adenocarcinoma. This innovative discovery is the focus of this multidisciplinary, multi-institutional project to expand our genomics examination of focal somatic copy number alterations, examine the role of stromal influences on invasion, investigate the diagnostic and therapeutic implications of gene amplification, and to understand the mechanisms that repress invasion in AIS and promote invasion in adenocarcinoma. Using well characterized cohorts of lung adenocarcinoma specimens, we will use RNA and DNA microarrays, whole exome sequencing, and fluorescent in situ hybridization to test the hypothesis that genomic loci with integrated alterations of copy number and mRNA levels are important for the acquisition of invasion and metastasis capacity in lung adenocarcinoma. Upon validation in resected specimens, these loci will be brought forth for prospective clinical testing in resected tumor specimens and in fine needle aspirates acquired from early stage lung adenocarcinoma tumors. Our long term goal is to develop biomarkers that will stratify risk before or after resection of tumors that are homogenous radiographically or histologically, respectively.