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Review
. 2014 Aug 15;5(3):335-43.
doi: 10.4291/wjgp.v5.i3.335.

Epidemiological studies of esophageal cancer in the era of genome-wide association studies

An-Hui Wang  1 , Yuan Liu  1 , Bo Wang  1 , Yi-Xuan He  1 , Ye-Xian Fang  1 , Yong-Ping Yan  1
Affiliations
Review

Epidemiological studies of esophageal cancer in the era of genome-wide association studies

An-Hui Wang et al. World J Gastrointest Pathophysiol. .

Abstract

Esophageal cancer (EC) caused about 395000 deaths in 2010. China has the most cases of EC and EC is the fourth leading cause of cancer death in China. Esophageal squamous cell carcinoma (ESCC) is the predominant histologic type (90%-95%), while the incidence of esophageal adenocarcinoma (EAC) remains extremely low in China. Traditional epidemiological studies have revealed that environmental carcinogens are risk factors for EC. Molecular epidemiological studies revealed that susceptibility to EC is influenced by both environmental and genetic risk factors. Of all the risk factors for EC, some are associated with the risk of ESCC and others with the risk of EAC. However, the details and mechanisms of risk factors involved in the process for EC are unclear. The advanced methods and techniques used in human genome studies bring a great opportunity for researchers to explore and identify the details of those risk factors or susceptibility genes involved in the process of EC. Human genome epidemiology is a new branch of epidemiology, which leads the epidemiology study from the molecular epidemiology era to the era of genome wide association studies (GWAS). Here we review the epidemiological studies of EC (especially ESCC) in the era of GWAS, and provide an overview of the general risk factors and those genomic variants (genes, SNPs, miRNAs, proteins) involved in the process of ESCC.

Keywords: Epidemiology; Esophageal cancer; Genome wide association study; MicroRNA; Single nucleotide polymorphism.

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