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Diindolylmethane:Inhibition of lung squamous cell carcinoma by targeting Akt.

二吲哚基甲烷：通过靶向 Akt 抑制肺鳞状细胞癌。

基本信息

批准号：
8383028
负责人：
Fekadu Kassie
金额：
$ 19.84万
依托单位：
UNIVERSITY OF MINNESOTA
依托单位国家：
美国
项目类别：
财政年份：
2012
资助国家：
美国
起止时间：
2012-07-13 至 2014-06-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/8383028
关键词：
A/J Mouse Affect Apoptosis Apoptotic Bioluminescence Cancer Etiology Carcinogens Carcinoma in Situ Cell Proliferation Cell Survival Cells Cessation of life Chemopreventive Agent Clinical Trials Consumption Data Development Diet Dose Dysplasia Early treatment Epidemiologic Studies Event Glucosinolates Goals Growth Human Hyperplasia Immunohistochemistry In Vitro Incidence Laboratories Lesion Luciferases Lung Malignant - descriptor Malignant Epithelial Cell Malignant Neoplasms Malignant neoplasm of lung Measures Mediating Metaplasia Methods Modeling Mus Normal Cell Patients Physiological Play Population Premalignant Preventive Process Proteins Reporter Research Role Signal Pathway Smoker Specimen Squamous Cell Squamous Cell Lung Carcinoma Squamous cell carcinoma Structure of parenchyma of lung Survival Rate Testing Time Tobacco-Associated Carcinogen Tumor Tissue United States Vegetables Western Blotting Xenograft Model base cigarette smoking clinical application combat cruciferous vegetable diindolylmethane disorder control exposed human population high risk human FRAP1 protein improved in vitro Assay lung carcinogenesis lung tumorigenesis molecular imaging mortality mouse model overexpression prevent protein expression survivin treatment strategy tumor tumor growth

项目摘要

DESCRIPTION (provided by applicant): The main goal of this project is to assess the efficacy of diindolylmethane (DIM), a bioactive compound from cruciferous vegetables, to block the malignant progression of bronchial preneoplastic lesions to lung squamous cell carcinoma (SCC) by targeting the Akt signaling pathway. Preliminary studies showed that exposure of human bronchial cells to physiologically relevant concentrations of DIM caused antiproliferative and apoptotic effects in tobacco carcinogen-transformed bronchial cells but not in normal bronchial cells. Further, we observed that DIM inhibits activation/expression of proteins involved in the Akt signaling pathway. Over- expression of constitutively activated Akt in cigarette smoke-transformed bronchial cells markedly reduced the apoptotic effects of DIM, indicating that the growth inhibitory and apoptotic activities of DIM are mediated by targeting Akt. In the present application, we will extend our studies to a mouse model of lung SCC and assess if DIM causes regression of bronchial preneoplastic lesions by inhibiting Akt activation. Moreover, we will conduct, using a molecular imaging approach, proof-of-concept studies to confirm that DIM targets Akt activation. Hypothesis: Akt activation plays a critical role in the progression of bronchial preneoplastic lesions to lung squamous cell carcinoma (SCC) and targeting Akt by DIM reverses this process. N-nitroso-tris- chloroethylurea (NTCU)-induced mouse model of lung SCC will be used to test the hypothesis. Specific Aim 1: To determine if DIM-inhibits NTCU-induced lung SCC and whether the Akt signaling pathway is the critical target for the chemopreventive activities of DIM. Specific Aim 2: To examine, using luciferase complementation-based molecular imaging platform, the role of phospho-Akt targeting on DIM-induced antiproliferative and apoptotic effects in vitro and tumor growth in xenograft models of lung cancer. Impact/Significance: The results of this study could provide a mechanistic basis and rationale for clinical trials of DIM asa chemopreventive agent in populations that are at high risk to develop lung cancer. PUBLIC HEALTH RELEVANCE: Lung cancer is the leading cause of cancer-related mortality. Although treatment methods have advanced during the last decades, lung cancer mortality is not significantly reduced. One potential approach to combat lung cancer is to develop chemopreventive agents. This project focuses on examining the efficacy of diindollylmethane, a constituent of vegetables, to prevent lung cancer in a mouse model and should allow further development of this compound for clinical applications.

描述（由申请人提供）：