Abstract:
AIMS:Esophageal cancer (EC) is one of the most prevalent and deadly cancers worldwide. Along with nutrition, smoking and alcohol consumption, human papillomavirus (HPV) infection is one of the major risk factors, which is modulated by host immune response. This study is aimed at elucidating how HPV modifies host immune system in the EC pathogenesis. METHODS:The HPV and HLA-DQB1 levels in primary esophageal squamous cell (ESC) cancer cells from Han, Khazak and Uygur patients were analyzed by quantitative real-time PCR and immunoblotting. The ability of HPV16 E6/E7 to transform normal primary ESCs was investigated by infecting ESC with pMSCVpuro-carried E6 or E7. The shRNA against HPV16 E6 or E7 was delivered by adenovirus into esophageal squamous cell carcinoma (ESCC) cells with high HPV content. The DNA methylation level of HLA-DQB1 was measured by methylation-specific PCR. RESULTS:The HLA-DQB1 expression level was correlated with the levels of HPV and inversely related to DNA methylation level of HLA-DQB1. Overexpressing HPV16 E6 or E7 alone was enough to transform normal primary ESCs. However, single knockdown of either E6 or E7 in ESC cancer cells did not reduce HLA-DQB1 expression. CONCLUSIONS:Oncogenic HPV E6 and E7 genes promoted ESCC pathogenesis by upregulating susceptible HLA-DQB1 via DNA demethylation.
journal_name
Asia Pac J Clin Oncoljournal_title
Asia-Pacific journal of clinical oncologyauthors
Feng B,Awuti I,Deng Y,Li D,Niyazi M,Aniwar J,Sheyhidin I,Lu G,Li G,Zhang Ldoi
10.1111/ajco.12135subject
Has Abstractpub_date
2014-03-01 00:00:00pages
66-74issue
1eissn
1743-7555issn
1743-7563journal_volume
10pub_type
杂志文章abstract:AIM:To investigate the role of endothelial cell damage in radiation-induced lung injury. METHODS:A total of 60 male Sprague-Dawley rats were irradiated to the right hemithorax with a single dose of 0, 7.0 or 14.4 Gy. Serial studies were performed before and at 1, 7, 30 and 90 days after radiation, respectively. Pathol...
journal_title:Asia-Pacific journal of clinical oncology
pub_type: 杂志文章
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journal_title:Asia-Pacific journal of clinical oncology
pub_type: 杂志文章,多中心研究
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journal_title:Asia-Pacific journal of clinical oncology
pub_type: 杂志文章,随机对照试验
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journal_title:Asia-Pacific journal of clinical oncology
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journal_title:Asia-Pacific journal of clinical oncology
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journal_title:Asia-Pacific journal of clinical oncology
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pub_type: 杂志文章,meta分析,评审
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更新日期:2013-06-01 00:00:00
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journal_title:Asia-Pacific journal of clinical oncology
pub_type: 杂志文章
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更新日期:2017-10-01 00:00:00
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更新日期:2017-10-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
doi:10.1111/j.1743-7563.2011.01509.x
更新日期:2012-09-01 00:00:00
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pub_type: 杂志文章,多中心研究
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更新日期:2014-09-01 00:00:00
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