美国斯坦福大学医学中心和加利福尼亚大学洛杉矶分校的研究者发现了一种由免疫系统产生的、能杀灭结核杆菌的蛋白。斯坦福大学的研究者于1987年首先发现这种免疫系统蛋白——粒溶素（granulysin）。早期研究证实,粒溶素能有效地杀伤各种靶细胞,但直到现在才证实它的抗微生物效力。 Researchers at the Stanford University Medical Center and the University of California, Los Angeles, discovered a protein produced by the immune system that kills Mycobacterium tuberculosis. Researchers at Stanford University first discovered this immune system protein, granulysin, in 1987. Earlier studies have shown that granulysin can effectively kill a variety of target cells, but its antimicrobial efficacy has not been confirmed until now.