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加蓬女性中p53密码子72多态性与宫颈癌风险的初步研究。

The preliminary study of p53 codon 72 polymorphism and risk of cervical carcinoma in Gabonese women.

作者信息

Assoumou Samira Zoa, Boumba Anicet Luc M, Ndjoyi-Mbiguino Angelique, Khattabi Abdelkrim, Ennaji Moulay Mustapha

机构信息

Laboratoire de Virologie, Microbiologie et Qualité/Ecotoxicologie and Biodiversité, Faculté des Sciences et Techniques de Mohammedia, Université Hassan II Mohammedia Casablanca, BP 146, Mohammedia, 20650, Maroc.

出版信息

Med Oncol. 2015 Jan;32(1):281. doi: 10.1007/s12032-014-0281-4. Epub 2014 Dec 12.

Abstract

Cervical cancer is the leading cause of cancer-related death in Africa and the first most common cancer in Gabonese women due to infection of high-risk human papillomavirus (HPV). However, other cofactors such as genetic factors also come into play. A common polymorphism of the p53 codon 72 in exon 4 with two alleles encoding arginine or proline is known at this locus. The homozygous arginine form of this polymorphism has been associated with the development of cervical cancer as an increased genetic risk factor. However, the results are still controversial. This study aims to investigate whether the genotype distribution of p53 codon 72 may be a risk factor for cervical cancer among Gabonese women. Samples from 102 Gabonese women, 31 diagnosed with cervical cancer and 71 healthy controls, were used. HPV detection was done by nested PCR with MY09/11 and GP5+/6+ primers followed by sequencing for HPV genotyping. p53 codon 72 polymorphism determination was performed by allele-specific PCR assay. Viral DNA was detected in 87.1 % of cases and in 54.93 % of control. HPV 16 was the most predominant in cancer and controls cases. The distribution of Arg/Arg, Arg/Pro and Pro/Pro genotypes was 35.5, 51.6 and 12.9 % in the cervical cancer group and 22.5, 62 and 15.5 % in the control group. No significant association was found between polymorphism of p53 itself as well as in combination with HPV16/18 infection and risk of development of cervical cancer among Gabonese women. Thus, the polymorphism of p53 codon 72 in exon 4 does not seem to play a role in the development of cervical cancer among Gabonese women.

摘要

宫颈癌是非洲癌症相关死亡的主要原因,也是加蓬女性中因高危型人乳头瘤病毒(HPV)感染而导致的最常见癌症。然而,其他辅助因素如遗传因素也发挥着作用。已知该位点外显子4中p53密码子72存在一种常见多态性,有两个等位基因分别编码精氨酸或脯氨酸。这种多态性的纯合精氨酸形式作为一种增加的遗传风险因素,已与宫颈癌的发生相关。然而,结果仍存在争议。本研究旨在调查p53密码子72的基因型分布是否可能是加蓬女性宫颈癌的一个风险因素。使用了102名加蓬女性的样本,其中31名被诊断为宫颈癌,7名作为健康对照。通过使用MY09/11和GP5+/6+引物的巢式PCR进行HPV检测,并随后进行测序以进行HPV基因分型。通过等位基因特异性PCR测定法进行p53密码子72多态性的测定。在87.1%的病例和54.93%的对照中检测到病毒DNA。HPV 16在癌症病例和对照病例中最为常见。宫颈癌组中Arg/Arg、Arg/Pro和Pro/Pro基因型的分布分别为35.5%、51.6%和12.9%,对照组中分别为22.5%、62%和15.5%。在加蓬女性中未发现p53自身的多态性以及与HPV16/18感染联合与宫颈癌发生风险之间存在显著关联。因此,外显子4中p53密码子72的多态性似乎在加蓬女性宫颈癌的发生中不起作用。

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