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Screening and characteristic analysis of human senescence-associated DNA fragment
Author(s): YANG Dongli, LIU Xinwen, ZHANG Zongyu, TONG Tanjun
Pages: 167-
170
Year: 2002
Issue:
2
Journal: JOURNAL OF PEKING UNIVERSITY(HEALTH SCIENCES)
Keyword: 衰老/遗传学; DNA/分离和提纯; RNA; 信使/分析;
Abstract: 目的:探索衰老相关新基因.方法:采用RAPD法筛选衰老相关的DNA片段,采用Southern blot 分析基因状态,Northern blot 分析mRNA水平.结果:筛选出衰老特异的DNA片段,长894 bp,命名为sad.将sad片段克隆、测序,查询GenBank,确认为一种新的衰老相关序列,基因登录号为AQ324104.Southern blot分析表明,sad基因可能是一种单拷贝基因;sad在衰老2BS细胞中的Southern blot图谱不同于年轻细胞,而与人胃癌细胞系BGC-823类似.Northern blot分析显示,sad基因具有表达活性,其RNA长约0.5 kb,相对水平在各代龄的细胞间差异无显著性.结论:sad是一种新的与衰老相关的DNA片段,sad基因可能为单拷贝基因,具有表达活性.
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