Identification of a minimal deletion region on chromosome 5q in Chinese esophageal squamous cell carcinomas.
The existence of unknown tumor suppressor gene(s) other than the APC gene has been hinted on 5q for esophageal squamous cell carcinoma (ESCC). In order to define minimal deletion intervals on 5q in ESCC and investigate the potential tumor suppressor gene(s), 9 microsatellite markers scattering the region from 5q22 to 5q35 were chosen for loss of heterozygosity (LOH) analysis in 50 primary ESCC from northern China. The results showed that six cases presented coexistence of LOH for three consecutive adjacent chosen markers, suggesting a minimal deletion region covering approximately 272 kb located on 5q23 from D5S1384 to D5S1505. It was a novel deletion region that was so far never reported in ESCC. Significant higher frequencies of LOH were observed in tumors with lower pathological grade at the locus D5S820 and with lymph node metastasis at the locus D5S408. The data suggested the possibility that one or more putative candidate tumor suppressor gene(s) on 5q23 might play an important role in the development and/or progression of ESCC.
National Laboratory of Molecular Oncology, Cancer Institute (Hospital), Chinese Academy of Medical Sciences and Peking Union Medical College, Panjiayuan, Chaoyang Qu, PO Box 2258, Beijing 100021, China.
Xiao-Dong
XD
Li
Xiao-Ping
XP
Huang
Chun-Xia
CX
Zhao
Qi-Ju
QJ
Li
Xin
X
Xu
Yan
Y
Cai
Ya-Ling
YL
Han
Tie-Hua
TH
Rong
Ming-Rong
MR
Wang
D000328:Adult; D000368:Aged; D044466:Asian People; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000473:pathology; D002681:China; D002895:Chromosomes, Human, Pair 5; D018450:Disease Progression; D004938:Esophageal Neoplasms / Q000235:genetics* / Q000473:pathology; D005260:Female; D017353:Gene Deletion; D016147:Genes, Tumor Suppressor; D006801:Humans; D019656:Loss of Heterozygosity; D008297:Male; D018895:Microsatellite Repeats; D008875:Middle Aged; D009362:Neoplasm Metastasis