https://scholars.lib.ntu.edu.tw/handle/123456789/112729
標題: | TELOMERE LENGTH IN HEPATOCELLULAR CARCINOMA AND PAIRED ADJACENT NON-TUMOR TISSUES BY QUANTITATIVE PCR | 作者: | 于明暉 李伯皇 Zhang, Yujing Shen, Jing Lee, Yu Po-Huang Santella, Regina M. |
關鍵字: | telomeric repeat liver cancer biomarkers quantitative real- time PCR | 公開日期: | 2007 | 卷: | v.25 | 期: | n.8 | 起(迄)頁: | 668-677 | 來源出版物: | CANCER INVESTIGATION | 摘要: | Telomere shortening limits the proliferative capacity of human cells, restrains the regenerative capacity of organ systems during chronic diseases and aging and also induces chromosomal instability as well as initiation of cancer. Previous studies demonstrated that telomeres are often significantly shorter in tumor tissue, including hepatocellular carcinoma (HCC), compared to the surrounding tissue, but telomere length in HCC tissues was not correlated with several clinical parameters, such as age, sex, HBV or HCV infections and tumor size. In the present study, the telomere length ratio of 36 paired HCC, and their adjacent non-tumor tissues was measured by quantitative PCR (Q-PCR). The mean telomere lengths (SD) for HCC and adjacent non-tumor tissues were 0.26 (0.10) and 0.47 (0.20) respectively (t = 6.22, P < 0.0001). There was a large difference in the distribution of subjects based on telomere length in tumor and adjacent non-tumor tissues. The number of tumors with telomere length shorter than 0.50 was much higher than that of adjacent non-tumor tissues; more than 90 % of the tissues with telomere length >= 0.50 were adjacent non-tumor tissues. The correlations between telomere length and aflatoxin B-1- and polycyclic aromatic hydrocarbon-DNA adducts level, p53 mutations and p16 hypermethylation status were also tested, but no significant associations were found. The relationship between telomere length shortening, chemical carcinogen exposure, and genetic and epigenetic changes in hepatocarcinogenesis needs further investigation. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/85496 |
顯示於: | 流行病學與預防醫學研究所 |
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