意大利科学家发现人体细胞死亡机制 意大利罗马托尔维尔加塔大学试验药物系的一个研究小组最近发现,人体细胞内一种称为gd_3的分子浓度增加到一定程度时,细胞即死亡。他们还发现,在细胞膜上有一种称为Fas的分子,它很像细胞自我毁灭的开关,当该分子被启动时,gd_3即在细胞内迅速聚集,细胞随之在几小时内死亡。促使gd_3增加有2种方法,一是从外部增加这种分子的含量;二是刺激细胞,使它自身产生这种分子。这种促使细胞死亡的机制有待进一步研究。 Italian scientists discover human cell death mechanism A team of experimental druggists at Gata University in Tolvalo, Rome, Italy, recently found that when a concentration of a molecule called gd_3 in human cells increased to some extent, the cells died. They also found that there is a molecule called Fas on the cell membrane, much like a cell self-destroying switch. When the molecule is activated, gd_3 rapidly accumulates in the cell and the cell dies within a few hours. Promote gd_3 increase in two ways, one from the outside to increase the content of this molecule; the second is to stimulate cells to make it produce their own molecules. This mechanism of cell death needs further study.