HUMAN 3P RECESSIVE ONCOGENES

描述（改编自研究者摘要）：这是一个新的 一项鉴定和研究假定隐性肿瘤功能的建议 在肺发育中重要的3p21.3中的抑制基因或基因 癌的 这种肿瘤抑制因子的证据来自于研究表明， 癌前病变中3 p21等位基因的早期丢失和3 p基因的等位基因丢失 在70-80%的小细胞和非小细胞肺癌中。 在特定 目的I提出利用一系列资源克隆该基因，包括 肺肿瘤细胞系中的一组纯合缺失，定义了350 kb， 潜在的30 kb关键区域，以及高分辨率的物理和 转录图谱，其中25个cDNA克隆已经在该区域中鉴定。 具体目标2是通过以下方式确定该基因座的功能特征： 将染色体3 p部分导入人肺癌细胞系 携带3p21.3异常，并检测致瘤性抑制 采用裸鼠软琼脂培养和细胞凋亡研究。 在特定 目标3申请方计划就以下意见采取后续行动： 可能参与抑制端粒酶活性， 基因改变肺癌细胞端粒长度和端粒酶功能 转移

DESCRIPTION (Adapted from the Investigator's Abstract): This is a new proposal to identify and study the function of a putative recessive tumor suppressor gene or genes in 3p21.3 important in the development of lung cancers. Evidence for such a tumor suppressor comes from studies showing the early loss of 3p21 alleles in preneoplasia, and allele loss of 3p genes in 70-80% of both small cell and non-small cell lung cancers. In specific aim I it is proposed to clone the gene using a series of resources including a set of homozygous deletions in lung tumor cell lines defining a 350 kb and potentially 30 kb critical region, and a high resolution physical and transcription map with 25 cDNA clones already identified in this region. Specific aim 2 is to determine functional characteristics of this locus by introduction of portions of chromosome 3p into human lung cancer lines bearing a 3p21.3 abnormality, and testing for suppression of tumorigenicity using nude mice, soft agarose culture and studies of apoptosis. In specific aim 3 the applicant plans to follow up on an observation that this region might be involved in suppressing telomerase activity by investigating telomere length and telomerase function in lung cancer cells altered by gene transfer.