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Ping Liu, Si-Hong You, Department of Oncology, the First Affiliated Hospital of Najing Medical University, Nanjing 210029, Jiangsu Province, China
Xiao-Yong Zhang, Dao-Fu Zhang, Department of Gastroenterology, the First Affiliated Hospital of Najing Medical University, Nanjing 210029, Jiangsu Province, China
Xiao-Jian Ding, Central Laboratory, the First Affiliated Hospital of Najing Medical University, Nanjing 210029, Jiangsu Province, China
Supported by: 135 project for outstanding person in medicine of Jiangsu Province, No. 52-2001.
Correspondence to: Dr. Ping Liu, Department of Oncology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China. liupinga@yahoo.com
Received: January 28, 2005 Revised: February 15, 2005 Accepted: February 26, 2005 Published online: May 15, 2005
AIM: To detect the loss of heterozygosity (LOH) of fragile histidine triad (FHIT) gene in gastric cancer and precancerous lesions (dysplasia and intestinal metaplasia), and to analyze its role in the carcinogenesis of gastric cancer.
METHODS: The LOH at microsatellites loci D3S1234 and D3S1300 of FHIT gene were measured in samples of gastric cancer (n = 42), dysplasia (n = 44), intestinal metaplasia (n = 51) and their corresponding normal tissues by (polymerase chain reaction) PCR.
RESULTS: The rates of LOH at D3S1234 locus were 32.4%(11/34), 28.6%(10/35) and 10%(4/40) in gastric cancer, dysplasia and intestinal metaplasia respectively, and the ones at D3S1300 locus were 33.3%(12/36) , 32.4%(11/34) and 7.7% (3/39) respectively. The LOH rates at D3S1234 and D3S1300 loci in gastric cancer and atypical hyperplasia were higher than that of intestinal metaplasia (P<0.05, P<0.01 for D3S1234 and D3S1300 respectively). No significant difference of LOH rate was found between gastric cancer and dysplasia.
CONCLUSION: The loss of heterozygosity of FHIT gene may be an early event in the tumorigenesis of gastric cancer.
Key Words: Stomach neoplasms; Gastric cancer; Precancerous lesion; Fragile histidine triad; Loss of heterozygosity
Citation: Liu P, You SH, Zhang XY, Zhang DF, Ding XJ. Heterozygosity loss of fragile histidine triad gene in gastric cancer and precancerous lesions. Shijie Huaren Xiaohua Zazhi 2005; 13(10): 1190-1193
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