| Association between RASSF1A Methylation and Clinicopathological Factors in Patients with Squamous Cell Carcinoma of Lung. |
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Naeyun Choi, Hye Sook Lee, In Seung Song, Yu Sung Lim, Dae Soon Son, Dae Sik Lim, Yong Soo Choi, Jhingook Kim, Hojoong Kim |
1Cancer Research Center, Center for Clinical Research, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.
2Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea. hjkim@smc.samsung.co.kr
3Department of Thoracic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.
4Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 373-1 Guseoung-D, Yuseong-G, Daejeon 305-701, Korea. |
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| Abstract |
BACKGROUND
RASSF1A, which is one of tumor suppressor genes, is frequently inactivated by hypermethylation of the promoter region in a variety of human cancers, including lung cancer. This study was performed to investigate the association between RASSF1A methylation and the clinicopathological factors in patients with squamous cell carcinoma of the lung. METHODS: Eighty-one samples from the patients with squamous cell carcinoma of lung were examined. The promoter methyation of RASSF1A was analyzed by methylation specific PCR and sequencing. Statistical analysis was made to examine the association between RASSF1A methylation and the clinicopathological parameters. RESULTS: RASSF1A methylation was observed in 37.0 % (30 of 81) of the patients with squamous cell carcinoma of the lung. RASSF1A methylation was found to be associated with cellular differentiation(p=0.0097) and the overall survival(p=0.0635). However, there was no association between RASSF1A methylation and the other clini?copathological parameters, such as the pathological TNM stage, the recurrence rate, lymph node invasion and the amount of cigarettes smoked. CONCLUSION: RASSF1A methylation might be associated with a poor prognosis in patients with squamous carcinoma of the lung. A larger scale study is needed. |
| Key Words:
Methylation, Squamous cell carcinoma, Tumor suppressor gene |
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