학술논문
Association of two BRM promoter polymorphisms with head and neck squamous cell carcinoma risk
Document Type
Academic Journal
Author
Wang, Jennifer R.; Gramling, Sarah J.B.; Goldstein, David P.; Cheng, Dangxiao; Chen, Duoduo; Azad, Abul K.; Tse, Alvina; Hon, Henrique; Chen, Zhuo; Mirshams, Maryam; Simpson, Colleen; Huang, Shao Hui; Marquez, Stephanie; O’Sullivan, Brian; Liu, Fei-Fei; Roberts, Heidi; Xu, Wei; Brown, Dale H.; Gilbert, Ralph W.; Gullane, Patrick J.; Irish, Jonathan C.; Reisman, David N.; Liu, Geoffrey
Source
Carcinogenesis. May 01, 2013 34(5):1012-1017
Subject
Language
English
ISSN
0143-3334
Abstract
The SWI/SNF chromatin remodeling complex is an important regulator of gene expression that has been linked to cancer development. Expression of Brahma (BRM), a critical catalytic subunit of SWI/SNF, is lost in a variety of solid tumors. Two novel BRM promoter polymorphisms (BRM-741 and BRM-1321) have been correlated with BRM loss and elevated cancer risk. The aim(s) of this study were to examine BRM expression in head and neck squamous cell carcinoma (HNSCC) and to correlate BRM polymorphisms with HNSCC risk. BRM expression studies were performed on eight HNSCC cell lines and 76 surgically resected tumor samples. A case–control study was conducted on 668 HNSCC patients (oral cavity, oropharynx, larynx and hypopharynx) and 700 healthy matched controls. BRM expression was lost in 25% of cell lines and 16% of tumors. The homozygous genotype of each polymorphism was significantly associated with increased HNSCC risk [BRM-741: adjusted odds ratio (aOR) 1.75, 95% CI 1.2–2.3, P < 0.001; BRM-1321: aOR 1.65, 95% CI 1.2–2.2, P < 0.001]. Individuals that were homozygous for both BRM polymorphisms had a more than 2-fold increase in the risk of HNSCC (aOR 2.23, 95% CI 1.5–3.4, P < 0.001). A particularly elevated risk was seen within the oropharynx, human papillomavirus-positive subgroup for carriers of both homozygous variants (aOR 3.09, 95% CI 1.5–6.8, P = 0.004). BRM promoter polymorphisms appear to act as susceptibility markers of HNSCC with potential utility in screening, prevention and treatment.