线粒体局部化的FABP4通过维护线粒体恒常性来抑制依赖铁灭的结核菌菌的传播
Tingting Zhao1, Xinyu Hu1, Ju Li1
1State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, College of Basic Medical Sciences, Jilin University, Changchun, China.
概括
结核菌菌感染抑制了线粒体脂肪酸结合蛋白4 (FABP4),促进了病原体的传播. 恢复FABP4可以抑制铁亡并减少细菌的增殖,为结核病提供新的治疗点.
科学领域:
- 细胞微生物学 细胞微生物学
- 免疫学 免疫学 免疫学
- 病原体与宿主相互作用
背景情况:
- 结核菌菌 (Mycobacterium tuberculosis,Mtb) 是一种引起结核病的细胞内病原体.
- Mtb感染引发了不同的有机体特异性免疫反应,其机制尚不清楚.
- 线粒体功能障碍与Mtb病变发生有关.
研究的目的:
- 阐明线粒体脂肪酸结合蛋白4 (FABP4) 在Mtb感染中的作用.
- 研究将Mtb,FABP4和铁亡联系在一起的分子机制.
- 探索FABP4作为一种潜在的结核病治疗点.
主要方法:
- 对感染Mtb的细胞进行分析,以评估FABP4表达和脂质过氧化.
- 基因操纵 (过度表达) 的线粒体FABP4.
- 测量反应性氧物种 (ROS),线粒体超氧化物和铁亡标记物 (例如,谷氨过氧化酶4).
- 评估mtb的扩散和细胞损伤.
主要成果:
- Mtb感染抑制了线粒体FABP4表达,增强了脂质过氧化,并诱导了铁亡.
- 线粒体FABP4的过度表达抵消了Mtb诱导的PGC-1α和UCP2.2的下调.
- FABP4的恢复减少了ROS,线粒体超氧化物和脂质过氧化,抑制了Mtb的增殖和细胞损伤.
结论:
- 线粒体FABP4在调节宿主免疫反应对Mtb感染方面发挥着至关重要的作用.
- 通过FABP4调节铁亡是促进Mtb病变的一个关键机制.
- 准线粒体FABP4为结核病治疗提供了一个有前途的战略.
相关概念视频
Animal Mitochondrial Genetics
9.3K
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
9.3K
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
17.1K
The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
17.1K
Export of Mitochondrial and Chloroplast Genes
4.2K
A eukaryotic cell can have up to three different types of genetic systems: nuclear, mitochondrial, and chloroplast. During evolution, organelles have exported many genes to the nucleus; this transfer is still ongoing in some plant species. Approximately 18% of the Arabidopsis thaliana nuclear genome is thought to be derived from the chloroplast’s cyanobacterial ancestor, and around 75% of the yeast genome derived from the mitochondria’s bacterial ancestor. This export has occurred...
4.2K
The Inner Mitochondrial Membrane
4.8K
The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria. In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...
4.8K
Mitochondrial Membranes
17.4K
A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
17.4K
Mitochondrial Protein Sorting
5.8K
Mitochondria are double-membrane organelles of the eukaryotes involved in cellular metabolism, signaling, ATP synthesis, and programmed cell death. Each of these processes requires specific proteins and enzymes that must be correctly sorted to the right mitochondrial subcompartment for the proper functioning of the organelle.
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
5.8K


