Non-small cell lung cancer (NSCLC) has been known as the most common human malignancy. The p53 tumor suppressor gene is mutated in approximately 50 % of NSCLC. For treatment of lung cancer, radiotherapy using -ray is general treatment. However, many patients suffer from recurred disease. Therefore, the definite mechanism of radiation based on in vivo mimic system is required for effective remedical value to NSCLC. Most of radiation biology studies were performed in conventional monolayer culture system which can not represent in vivo tumor environment. Hence, study applying in vivo mimic three-dimensional culture system is necessary to elucidate the molecular mechanism of solid tumor. Here, we analyzed gene expression profile induced by ionizing radiation (IR) in H1299 cells grown as spheroid in three-dimensional cell culture system. Our data showed that different gene expression profiles among monolayer culture system, three-dimensional small spheroid and three-dimensional large spheroid system. Particularly, genes related with microenvironment including adhesion junction and hypoxia had different expression level in three-dimensional spheroid system compare with monolayer culture system. This study suggested that in vivo mimic three-dimensional cell culture engineering approach might provide critical clues for understanding of cellular responses in p53 mutated or deleted lung cancer cells against IR. (* This work was supported by Nuclear Research Development Program of the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korean government (MEST). (Grand code: 2007-2001431, 2008-2001694, 2009-0078295) from Korea Science and Engineering Foundation)

Note: This abstract was not presented at the AACR 101st Annual Meeting 2010 because the presenter was unable to attend.

Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 101st Annual Meeting of the American Association for Cancer Research; 2010 Apr 17-21; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2010;70(8 Suppl):Abstract nr LB-167.