广播电视英语短句 第 154 课：类风湿关节炎-2

He says normally a protein in healthy immune cells causes the cells to die after they attack an invading virus or bacteria. 他表示通常健康的免疫细胞中的蛋白质在攻击了一种侵袭病毒或细菌后会引起细胞死亡。

But in rheumatoid arthritis, that protein is missing in some immune cells. 但类风湿性关节炎中的蛋白质会在某些免疫细胞内流失掉。

Instead, the protein builds up in the joints and attacks cartilage and bone. 相反，积聚在关节里的蛋白质会损害软骨和骨骼。

Professor Perlman developed what he calls a suicide molecule. Perlman教授发展了被他称为自杀分子的研究。

It acts like the protein that directs cells to self-destruct. 自杀分子的行为就好像蛋白质引导了细胞的自我毁灭。