文章基本信息

标题：Assessment of the Mutations of p53 Suppressor Gene and Ha- and Ki-ras Oncogenes in Malignant Mesothelioma in Relation to Asbestos Exposure: A Study of 12 American Patients
本地全文：下载
作者：Fumihiko KITAMURA ; Shunichi ARAKI ; Yasunosuke SUZUKI 等
期刊名称：Industrial Health
印刷版ISSN：0019-8366
电子版ISSN：1880-8026
出版年度：2002
卷号：40
期号：2
页码：175-181
DOI：10.2486/indhealth.40.175
出版社：National Institute of Occupational Safety and Health
摘要：In our previous study, we found no genetic alteration in exons 1 and 2 of Ha- and Ki-ras oncogenes nor in exons 5 to 9 of the p53 suppressor gene in seven Japanese malignant mesothelioma patients exposed to asbestos. To examine further whether malignant mesothelioma due to asbestos has genetic alterations in the p53 suppressor gene and in Ha- and Ki-ras oncogenes, we analyzed point mutations of these genes in paraffin embedded operative open biopsied samples of the primary tumor of malignant mesothelioma in twelve American patients. The genetic analysis was conducted by the PCR-SSCP (polymerase chain reaction single-strand conformation polymorphism) method in all patients and by sequencing analysis of DNA bases in the two patients with suspected gene mutation. The analysis of the p53 suppressor gene showed an amino acid converting mutation of exon 7 in one patient and a polymorphism of exon 6 in another patient; the former patient was a heavy smoker with a biphasic cell type. No genetic alteration was found in exons 1 and 2 of Ha- and Ki-ras oncogenes in any of the patients. The results suggest that the effects of asbestos on the p53 suppressor gene and Ha- and Ki-ras oncogenes in malignant mesothelioma are negligible. Further studies are needed to examine whether the observed mutation of the p53 suppressor gene is due to the combined effects of asbestos and smoking or to other unknown factors.
关键词：Malignant mesothelioma;Asbestos;p53 suppressor gene;ras oncogene;PCR-SSCP analysis;Sequencing analysis;Primary tumor