中国女性中TP53基因第72位密码子多态性与宫颈癌风险的关联
Association of TP53 codon 72 polymorphism with cervical cancer risk in Chinese women.
作者信息
Jiang Pei, Liu Jianxin, Zeng Xiaoxi, Li Wen, Tang Jianxin
机构信息
School of Info-physics and Geomatics Engineering, Central South University, ChangSha 410083, Hunan Province, P.R. China.
出版信息
Cancer Genet Cytogenet. 2010 Mar;197(2):174-8. doi: 10.1016/j.cancergencyto.2009.11.011.
Polymorphism at codon 72 of TP53, resulting in either the arginine (Arg) or proline (Pro) form of p53 (R72P), has been associated with the susceptibility to different cancers. To better understand the role of this polymorphism in cervical cancer etiology, we investigated the association between p53 R72P and cervical cancer risk in Chinese women from southern Han. Blood samples from 105 women with cervical cancer and from 140 female blood donors were collected. DNA from peripheral blood lymphocytes was extracted, and the exon 4 of TP53 was amplified by polymerase chain reaction and then digested by BstUI. We observed that the Arg/Arg genotype was significantly associated with an increased risk for cervical cancer [odds ratio (OR)=1.465, 95% confidence interval (95%CI)=1.04-2.138, P=0.02]. The relative frequency of each allele was 0.69 for Arg and 0.31 for Pro in patients with cervical cancer, and 0.60 for Arg and 0.40 for Pro in normal controls (P<0.05). Furthermore, we also found that the TP53 R72P polymorphism was not linked to tumor histologic type, histologic grade, lymph node metastases, and tumor size. These findings suggest that the TP53 codon 72 polymorphism may be implicated in cervical carcinogenesis, with the Arg/Arg genotype being associated with an increased susceptibility for this malignancy in the southern Chinese population.
TP53基因第72位密码子的多态性会导致p53的精氨酸(Arg)或脯氨酸(Pro)形式(R72P),这与对不同癌症的易感性有关。为了更好地理解这种多态性在宫颈癌病因学中的作用,我们调查了中国南方汉族女性中p53 R72P与宫颈癌风险之间的关联。收集了105名宫颈癌女性和140名女性献血者的血样。提取外周血淋巴细胞的DNA,通过聚合酶链反应扩增TP53的外显子4,然后用BstUI酶切。我们观察到,Arg/Arg基因型与宫颈癌风险增加显著相关[比值比(OR)=1.465,95%置信区间(95%CI)=1.04 - 2.138,P = 0.02]。宫颈癌患者中,每个等位基因的相对频率为Arg 0.69、Pro 0.31,正常对照中Arg为0.60、Pro为0.40(P < 0.05)。此外,我们还发现TP53 R72P多态性与肿瘤组织学类型、组织学分级、淋巴结转移及肿瘤大小无关。这些发现表明,TP53第72位密码子多态性可能与宫颈癌发生有关,在中国南方人群中,Arg/Arg基因型与该恶性肿瘤的易感性增加相关。