NK细胞是近年来发现的一种与特异性免疫应答无关的细胞毒淋巴细胞。它比T和B淋巴细胞更加原始。它不但能够杀伤某些肿瘤细胞,而且能够杀伤病毒感染的靶细胞,因此使学者们产生了很大的兴趣,进行了一系列的研究。本文着重就NK细胞作用机制的最近研究成果做一简要综述。 NK cells is a cytotoxic lymphocyte that has not been associated with specific immune response in recent years. It is more primitive than T and B lymphocytes. It not only kills some tumor cells, but also can kill the virus-infected target cells, so the scholars have great interest in conducting a series of studies. This article focuses on the mechanism of NK cells recently made a brief review of the research results.