For faster navigation, this Iframe is preloading the Wikiwand page for 自然杀伤细胞.

自然杀伤细胞

自然杀伤细胞
NK细胞具有与其他淋巴细胞相似的外观,它们除具有共同来源外,亦会进行互补性活动
基本信息
系统免疫系统
功能细胞毒性淋巴细胞
标识字符
MeSHD007694
FMAFMA:63147
显微解剖学术语英语Anatomical terms of microanatomy

自然杀伤细胞(英语:natural killer cell)是一种细胞质中具有大颗粒的淋巴细胞,简称NK细胞NK cell),也称作大颗粒淋巴细胞(LGL, Large Granular Lymphocytes)。由骨髓淋巴样干细胞发育而成,其分化、发育依赖于骨髓或胸腺微环境,主要分布于外周血和脾脏,在淋巴结和其他组织中也有少量存在。[1]

自然杀伤细胞因其非专一性的细胞毒杀作用而被命名,属于先天免疫系统的成员,它没有T细胞B细胞所具的受体,不会进行受体的基因重组(B细胞、T细胞的V(D)J重组,以及B细胞的体细胞高频突变)。但仍具有一些特殊受体,称为“杀伤细胞免疫球蛋白样受体”,可以激活或抑制其作用在血液中循环,但也在骨髓脾脏淋巴结中出现,约占所有淋巴细胞的细胞的5~10%,但它可以消灭许多种病原体及多种肿瘤细胞。自然杀伤细胞会直接和陌生细胞接触,并以细胞膜破裂之方式杀死此细胞,可利用分泌穿孔素及肿瘤坏死因子,摧毁目标细胞。

一般认为在外周血单个核细胞(PBMC)中分选到CD56+/CD3-的细胞即为NK细胞。

由于被感染的细胞上缺乏MHC1类分子,导致NK细胞激活

参考资料

  1. ^ Vivier, Eric; Tomasello, Elena; Baratin, Myriam; Walzer, Thierry; Ugolini, Sophie. Functions of natural killer cells. Nature Immunology. 2008-04-18, 9 (5). ISSN 1529-2908. doi:10.1038/ni1582. 

延伸阅读

  • Cellular and Molecular Immunology by Abul K. Abbas & Andrew Lichtman Saunders Copyright 2003
  • How the Immune System Works, 2nd edition, by Lauren Sompayrac, PhD Blackwell Publishing 2003
  • Immunobiology: The Immune System In Health And Disease by Janeway, Travers, Walport & Shlomchik Churchchill Livingstone Copyright 2005
  • Kuby Immunology, 6th edition, by Thomas J. Kindt, Richard A. Goldsby, and Barbara A. Osborne, W.H. Freeman and Company, New York

参看

外部链接

{{bottomLinkPreText}} {{bottomLinkText}}
自然杀伤细胞
Listen to this article

This browser is not supported by Wikiwand :(
Wikiwand requires a browser with modern capabilities in order to provide you with the best reading experience.
Please download and use one of the following browsers:

This article was just edited, click to reload
This article has been deleted on Wikipedia (Why?)

Back to homepage

Please click Add in the dialog above
Please click Allow in the top-left corner,
then click Install Now in the dialog
Please click Open in the download dialog,
then click Install
Please click the "Downloads" icon in the Safari toolbar, open the first download in the list,
then click Install
{{::$root.activation.text}}

Install Wikiwand

Install on Chrome Install on Firefox
Don't forget to rate us

Tell your friends about Wikiwand!

Gmail Facebook Twitter Link

Enjoying Wikiwand?

Tell your friends and spread the love:
Share on Gmail Share on Facebook Share on Twitter Share on Buffer

Our magic isn't perfect

You can help our automatic cover photo selection by reporting an unsuitable photo.

This photo is visually disturbing This photo is not a good choice

Thank you for helping!


Your input will affect cover photo selection, along with input from other users.

X

Get ready for Wikiwand 2.0 🎉! the new version arrives on September 1st! Don't want to wait?