来自NK细胞的外基因组通过抑制细胞铁灭菌来限制Mycobacterium结核病感染
Linzhi Yue1, Xuan Wang2, Tao Ma1
1Department of Medical Microbiology and Immunology, School of Basic Medical Sciences, Dali University, Dali, China; Yunnan Key Laboratory of Screening and Research on Anti-Pathogenic Plant Resources from Western Yunnan, Yunnan, China.
概括
自然杀手细胞外基因组 (NK-exo) 通过调节铁,一种依赖于铁的细胞死亡,对抗结核病 (TB) 有希望. 这项研究表明NK-exo.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 传染性疾病 传染性疾病
背景情况:
- 结核病 (TB) 仍然是一个重大的全球卫生挑战.
- 铁代谢和铁亡越来越多地与结核病发病有关.
- 自然杀手细胞外体 (NK-exo) 被探索其免疫调节潜力.
研究的目的:
- 研究NK-exo是否可以通过调节铁亡来增强宿主对Mycobacterium结核病 (MTB) 的抵抗力.
- 阐明NK-exo在缓解MTB感染中的潜在分子机制.
主要方法:
- 在MTB感染的巨细胞和小鼠模型中评估NK-exo的治疗疗效.
- 使用西式涂抹和RT-qPCR分析了与铁亡相关的蛋白质表达.
- 组织病理损伤和细菌负载量化.
- 用ferroptosis激活剂RSL3.3证实了ferroptosis的作用.
主要成果:
- NK-exo治疗减少了受感染细胞和组织中的MTB负载,ROS积累和铁亡.
- NK-exo上调的GPX4和下调的SLC7A11,ACSL4和TFRC,这些都是关键的铁灭调节剂.
- 通过RSL3,NK-exo的保护作用被逆转,证实了ferroptosis路径的参与.
结论:
- 通过向铁灭调节剂,NK-exo有效地减轻MTB诱导的脂质过氧化和组织损伤.
- NK-exo代表了一种潜在的新型无细胞结核免疫疗法.
相关概念视频
Nuclear Export
The nucleus restricts several proteins within and allows others to pass. The restricted proteins possess a nuclear retention sequence or NRS, anchoring them to the nuclear lamins and preventing their transport to the cytosol. The non-restricted proteins, after their synthesis, are transported to their site of action, such as the cytosol or other organelles, with the help of nuclear export signals or NES.
NES are of three types- the canonical 10-residue long leucine-rich signal and other...
NES are of three types- the canonical 10-residue long leucine-rich signal and other...
NF-κB-dependent Signaling Pathway
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
Cells of the Innate Immune Response
The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Immune Surveillance by NK Cells and Phagocytes
Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Cytotoxic T Cells-mediated Immune Response
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Inhibitors of Bacterial Protein Synthesis
Aminoglycosides constitute a highly potent class of bactericidal antibiotics that exert their antimicrobial effects by targeting the bacterial ribosome, specifically disrupting protein synthesis. These polycationic molecules consist of amino-modified sugars linked via glycosidic bonds to an aminocyclitol core such as 2-deoxystreptamine or streptamine. Their strong positive charges facilitate tight binding to the negatively charged phosphate backbone of ribosomal RNA (rRNA), primarily at the 16S...


