Single-nucleotide polymorphism-mass array reveals commonly deleted regions at 3p22 and 3p14.2 associate with poor clinical outcome in esophageal squamous cell carcinoma.
Esophageal squamous cell carcinoma (ESCC) is one of the most common solid tumors in the world with poor prognosis. Deletion of chromosome 3p is one of the most frequent chromosomal alterations in ESCC, suggesting the existence of one or more tumor suppressor genes (TSGs) at this region. In the present study, a recently developed high-throughput and high-resolution technology, single-nucleotide polymorphism (SNP)-mass array, was applied to investigate loss of heterozygosity on 3p in 100 primary ESCC cases with 386 SNP markers. Four commonly deleted regions (CDRs) at 3p26.3, 3p22, 3p21.3 and 3p14.2 were identified. Absent and down-regulated expression of several candidate TSGs, including CHL1, PCAF, RBMS3, PLCD1 and CACNA2D3, were detected in primary ESCC tumors and ESCC cell lines. Moreover, deletions of CDRs 2 and 4 were correlated with advanced tumor stage and deletion of CDR2 was associated with tumor metastasis in ESCC. Our findings provided evidence that minimal deleted regions at 3p26.3, 3p22, 3p21.3 and 3p14.2 containing potential TSGs may contribute to the pathogenesis of esophageal cancer.
Qin
Yan Ru
YR
Department of Clinical Oncology, the First Affiliated Hospital, Zhengzhou University, Zhengzhou, China.
Fu
Li
L
Sham
Pak C
PC
Kwong
Dora L W
DL
Zhu
Cai Lei
CL
Chu
Kevin K W
KK
Li
Yan
Y
Guan
Xin-Yuan
XY
D002294:Carcinoma, Squamous Cell / Q000235:genetics*; D045744:Cell Line, Tumor; D002872:Chromosome Deletion; D002893:Chromosomes, Human, Pair 3; D004938:Esophageal Neoplasms / Q000235:genetics*; D016147:Genes, Tumor Suppressor; D006801:Humans; D019656:Loss of Heterozygosity; D020641:Polymorphism, Single Nucleotide; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction
D012333:RNA, Messenger