Zhu Guang-Neng, Zuo Li, Zhou Qing, Zhang Su-Mei, Zhu Hua-Qing, Gui Shu-Yu, Wang Yuan
Laboratory of Molecular Biology and Department of Biochemistry, Anhui Medical University, Hefei 230032, Anhui Province, China.
World J Gastroenterol. 2004 Jul 1;10(13):1975-8. doi: 10.3748/wjg.v10.i13.1975.
To analyze loss of heterozygosity (LOH) and homozygous deletion on p53 gene (exon2-3, 4 and 11), chromosome 10q22-10q23 and 22q11.2 -22q12.1 in human hepatocellular carcinoma (HCC).
PCR and PCR-based microsatellite polymorphism analysis techniques were used.
LOH was observed at D10S579 (10q22-10q23) in 4 of 20 tumors (20%), at D22S421 (22q11.2-22q12.1) in 3 of 20(15%), at TP53.A (p53 gene exon 2-3) in 4 of 20(20%), at TP53.B (p53 gene exon 4) in 6 of 20(30%), and at TP53.G (p53 gene exon 11) in 0 of 20(0%). Homozygous deletion was detected at 10q22-10q23(8/20; 40%), 22q11.2-22q12.1(8/20; 40%), p53 gene exon 2-3(0/20;0%), p53 gene exon 4(6/20; 30%), and p53 gene exon 11(2/20; 10%).
There might be unidentified tumor suppressor genes on chromosome 10q22-10q23 and 22q11.2-22q12.1 that contribute to the pathogenesis and development of HCC.
分析人类肝细胞癌(HCC)中p53基因(外显子2 - 3、4和11)、染色体10q22 - 10q23以及22q11.2 - 22q12.1上的杂合性缺失(LOH)和纯合性缺失情况。
采用聚合酶链反应(PCR)和基于PCR的微卫星多态性分析技术。
在20个肿瘤中的4个(20%)观察到D10S579(10q22 - 10q23)处存在杂合性缺失,在20个中的3个(15%)观察到D22S421(22q11.2 - 22q12.1)处存在杂合性缺失,在20个中的4个(20%)观察到TP53.A(p53基因外显子2 - 3)处存在杂合性缺失,在20个中的6个(30%)观察到TP53.B(p53基因外显子4)处存在杂合性缺失,在20个中的0个(0%)观察到TP53.G(p53基因外显子11)处存在杂合性缺失。在10q22 - 10q23(8/20;40%)、22q11.2 - 22q12.1(8/20;40%)、p53基因外显子2 - 3(0/20;0%)、p53基因外显子4(6/20;30%)以及p53基因外显子11(2/20;10%)检测到纯合性缺失。
在染色体10q22 - 10q23和22q11.2 - 22q12.1上可能存在未被识别的肿瘤抑制基因,它们参与了肝细胞癌的发病机制和发展过程。