GENETIC ANALYSIS OF RAS TRANSFORMATION AND JUN FUNCTION

RAS 转化和 Jun 功能的遗传分析

• 批准号: 6350227
• 负责人: RANDALL Scott JOHNSON
• 金额: $ 32.25万
• 依托单位: UNIVERSITY OF CALIFORNIA, SAN DIEGO
• 依托单位国家: 美国
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-04-20 至 2002-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6350227
• 关键词: gene mutation; gene targeting; genetically modified animals; laboratory mouse; neoplasm /cancer genetics; neoplastic transformation; phosphorylation; protooncogene; transcription factor; transfection; ubiquitin

DESCRIPTION: (adapted from applicant's abstract): A critical link between the activation of the ras proto-oncogene and transcriptional activation is the transactivation of c-Jun and AP-1 transcription factors. The applicant has created a null mutation of c-jun in the mouse. Primary cells derived from such embryos growth arrest immediately in culture. Growth arrest can be overcome by co-transformation with large T antigen and activated Ras; however, these cells, unlike wild type cells transformed by the same agents, remain non-tumorigenic. These data indicate a critical role of c-jun in Ras induced tumor formation. The applicant proposes to further elucidate this role using a combined biochemical and genetic approach. First, he will perform targeted replacement of c-jun with a S63/S73 mutant, to assess role of JNK-mediated phosphorylation on c-jun function in vivo. Similar approaches will be used to determine the role of and the requirement for the delta region, which is thought to play a role both in JNK recruitment and in ubiquitination/destabilization of c-jun. The possible redundancy of different c-jun genes will be assessed by studies in which c-jun is replaced by jun B or jun D. In addition, the applicant will assess the role of junD directly by performing a junD knockout. Finally, the applicant will use a novel in vivo assay of tumorigenic establishment and screen for candidate target genes involved in ras/AP-1 mediate tumorigenesis.

描述：（改编自申请人的摘要）：一个关键的环节之间