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古往今来,人类无限眷念生命,并不懈地寻求长生之术。现代生理学研究证明了“人类有一死”这一无奈的结论。然而,这一结论最近受到了有力的挑战。美国得克萨斯西南医学中心大学的研究人员做了这样一项试验:在采集的包皮细胞中导入某种基因,该基因可使细胞产生一种称之为端粒酶的物质。在端粒酶的作用下,这些细胞就像注入兴奋剂,已分裂了300多次还完全没有停止的趋势,也没有任何异常的迹象。而一般情况下,包皮细胞在变老前只能分裂60次左右。与此同时,美国加州门洛帕克杰龙公司的研究人员采用人体视网膜细
Throughout the ages, mankind has gained a great deal of respect for life and has tirelessly sought for the longevity technique. The research of modern physiology proves the helpless conclusion that human beings die. However, this conclusion has been strongly challenged recently. Researchers at the University of Texas Southwestern Medical Center in Texas, USA, have done such a test by introducing into the harvested foreskin a gene that causes the cell to produce a substance called telomerase. Under the action of telomerase, these cells resembled stimulants, split more than 300 times and did not stop at all, nor did they show any sign of abnormality. Under normal circumstances, the foreskin cells can only split about 60 times before getting old. At the same time, researchers at Menlo Parkway, California, USA, use human retinal fine