Abstract:
UNLABELLED:Non–small-cell lung carcinoma (NSCLC) (n = 65) were analyzed for promoter methylation of RASSF1A, CDH13, MGMT, ESR1, and DAPK genes in matching lung tumors, normal lung tissue, and blood samples. Aberrant methylation in CDH13 and MGMT was associated with clinicopathologic features of NSCLC. Hypermethylation detected in primary tumors was not observed in corresponding blood samples, which rendered this an unsuitable blood-based test for NSCLC detection. INTRODUCTION:Systemic methylation changes may be a diagnostic marker for tumor development or prognosis. Here, we investigate the relationship between gene methylation in lung tumors relative to normal lung tissue and whether DNA methylation changes can be detected in paired blood samples. MATERIAL AND METHODS:Sixty-five patients were enrolled in a surgical case series of non-small-cell lung carcinoma at a single institution. By using bisulfite pyrosequencing, CpG methylation was quantified at 5 genes (RASSF1A, CDH13, MGMT, ESR1, and DAPK) in lung tumor, pathologically normal lung tissue, and circulating blood from enrolled cases. RESULTS:The analyses of methylation in tumors compared with normal lung tissue identified higher methylation of CDH13, RASSF1A, and DAPK genes, whereas ESR1 and MGMT methylation did not differ significantly between these tissue types. We then examined whether the 3 aberrantly methylated genes could be detected in blood. The difference in methylation observed in tumors was not reflected in methylation status of matching blood samples, which indicated a low feasibility of detecting lung cancer by analyzing these genes in a blood-based test. Lastly, we probed whether tumor methylation was associated with clinical and demographic characteristics. Histology and sex were associated with methylation at the CDH13 gene, whereas, stage was associated with methylation at MGMT. CONCLUSION:Our results showed higher methylation of RASSF1A, CDH13, and DAPK genes in lung tumors compared with normal lung. The lack of reflection of these methylation changes in blood samples from patients with non-small-cell lung carcinoma indicates their poor suitability for a screening test.
journal_name
Clin Lung Cancerjournal_title
Clinical lung cancerauthors
Kontic M,Stojsic J,Jovanovic D,Bunjevacki V,Ognjanovic S,Kuriger J,Puumala S,Nelson HHdoi
10.1016/j.cllc.2011.11.003subject
Has Abstractpub_date
2012-07-01 00:00:00pages
297-303issue
4eissn
1525-7304issn
1938-0690pii
S1525-7304(11)00264-6journal_volume
13pub_type
杂志文章abstract::Combined-modality therapy with chemotherapy and radiation appears to be the most efficacious therapeutic modality for patients with locally advanced non-small-cell lung cancer. Most of the trials exploring this approach have utilized older agents such as cisplatin, vinblastine, and etoposide. Recent data suggest that ...
journal_title:Clinical lung cancer
pub_type: 杂志文章
doi:10.3816/clc.2002.s.003
更新日期:2002-03-01 00:00:00
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journal_title:Clinical lung cancer
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doi:10.3816/clc.2004.n.032
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journal_title:Clinical lung cancer
pub_type: 杂志文章,评审
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journal_title:Clinical lung cancer
pub_type: 杂志文章,meta分析
doi:10.1016/j.cllc.2015.01.002
更新日期:2015-09-01 00:00:00
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pub_type: 杂志文章
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journal_title:Clinical lung cancer
pub_type: 杂志文章
doi:10.1016/j.cllc.2014.06.001
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journal_title:Clinical lung cancer
pub_type: 杂志文章
doi:10.1016/j.cllc.2018.05.008
更新日期:2018-09-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/j.cllc.2018.10.010
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journal_title:Clinical lung cancer
pub_type: 杂志文章
doi:10.1016/j.cllc.2018.08.020
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journal_title:Clinical lung cancer
pub_type: 杂志文章,评审
doi:10.3816/CLC.2003.n.018
更新日期:2003-07-01 00:00:00
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journal_title:Clinical lung cancer
pub_type: 杂志文章
doi:10.1016/j.cllc.2020.01.013
更新日期:2020-07-01 00:00:00
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journal_title:Clinical lung cancer
pub_type: 杂志文章
doi:10.1016/j.cllc.2013.11.001
更新日期:2014-03-01 00:00:00
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journal_title:Clinical lung cancer
pub_type: 杂志文章
doi:10.1016/j.cllc.2013.09.003
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journal_title:Clinical lung cancer
pub_type: 杂志文章,评审
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journal_title:Clinical lung cancer
pub_type: 杂志文章
doi:10.1016/j.cllc.2014.09.010
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journal_title:Clinical lung cancer
pub_type: 杂志文章
doi:10.1016/j.cllc.2018.03.011
更新日期:2018-09-01 00:00:00
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journal_title:Clinical lung cancer
pub_type: 杂志文章
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更新日期:1999-08-01 00:00:00
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journal_title:Clinical lung cancer
pub_type: 杂志文章
doi:10.1016/j.cllc.2012.03.012
更新日期:2013-01-01 00:00:00
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journal_title:Clinical lung cancer
pub_type: 杂志文章,评审
doi:10.3816/clc.2008.s.003
更新日期:2008-02-01 00:00:00
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journal_title:Clinical lung cancer
pub_type: 杂志文章
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更新日期:2009-07-01 00:00:00
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journal_title:Clinical lung cancer
pub_type: 杂志文章
doi:10.1016/j.cllc.2015.03.008
更新日期:2015-09-01 00:00:00
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journal_title:Clinical lung cancer
pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2020-09-01 00:00:00
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pub_type: 杂志文章
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更新日期:2020-09-01 00:00:00