Single-nucleotide
Polymorphisms in NGX6 Gene and Their Correlation with Nasopharyngeal
Carcinoma
XIONG Wei, ZENG Zhao-Yang, LI Xiao-Ling,
LI Wei-Fang, LI Jiang, HE Lin1, LI Gui-Yuan*
( Cancer Research Institute, Xiangya Medical School of Central South
University, Changsha 410078, China; 1Shanghai
Institutes for Biological Sciences, the Chinese Academy of Sciences, Shanghai 200031,
China )
Abstract
Nasopharyngeal carcinoma (NPC) is rare in most parts of the world, but
prevalent in southern China. Recently, a NGX6 gene was cloned, which is
located in the region of minimal heterozygosity deletion at 9p21.3¡ª22.1 and is
down-expressed in NPC. The latest results suggest that the NGX6 gene is
a candidate tumor suppressor for NPC. A correlation study using 2
single-nucleotide polymorphisms (SNPs) within NGX6 gene by means of
dynamic allele specific hybridization (DASH) was performed in 105 unrelated
case subjects and 183 control subjects which matched to the NPC cases in age,
sex and residence. Significant results were obtained for one SNP mark
(rs879284), which was located at -237 bp 5' up-stream of NGX6 gene, and
the relative risk of this SNP mark was 3.93 (genotype CT) and 2.27 (genotype
TT). The result has proved again that NGX6 gene may play a certain role
in oncogenesis and development of nasopharyngeal carcinoma. The SNP mark
rs879284 may influence on the expression of NGX6 gene due to its
location on chromosome.
Key words single-nucleotide polymorphisms; NGX6
gene; nasopharyngeal carcinoma; DASH
*Corresponding author£º Tel, 86-731-4805446; Fax,
86-731-4805383;
e-mail, [email protected]