ALDH2 rs671变体通过破坏线粒体复合体I组装来增强血小板激活和血栓形成
Haoxuan Zhong1, Maieryemu Waresi1,2, Zhiyong Qi1
1Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai 200032, China.
Cardiovascular research
|October 28, 2025
概括
ALDH2 rs671 变体通过通过线粒体功能受损增强血小板激活,增加了血栓形成的风险. 尼古丁胺胺氨基二核酸 (NAD+) 补充剂可以减轻这种风险.
科学领域:
- 生物化学和分子生物学
- 心血管研究研究心血管研究
- 遗传学和基因组学 遗传学和基因组学
背景情况:
- 化脱酶2 (ALDH2) 对于解毒和氧化还原平衡至关重要.
- 在东亚人中常见的ALDH2 rs671变体会损害酶活性,并增加血栓形成的风险.
- ALDH2在血小板激活和血栓形成中的确切作用尚不清楚.
研究的目的:
- 研究ALDH2在血小板激活中的功能作用.
- 阐明ALDH2变异相关的血栓形成风险背后的机制.
- 评估NAD+补充作为一种潜在的治疗策略.
主要方法:
- 在野生型,Aldh2-knockout和Aldh2-knockin小鼠与人类实验对象 (冠状动脉疾病患者和健康志愿者) 的比较分析.
- 评估血小板激活标志物 (聚合,颗粒释放,整合素激活) 和血栓形成.
- 机制研究包括免疫沉,质谱和RNA测序.
- 评估尼古丁胺胺氨基二核酸 (NAD+) 补充剂.
主要成果:
- 携带ALDH2 rs671变异的携带者表现出血小板对原蛋白的反应性升高.
- 在小鼠中,ALDH2缺乏导致了原诱导的增强血小板聚合,颗粒释放和整合素激活.
- 缺少ALDH2会破坏线粒体复合体I,通过原/GPVI/NOX1通路增加活性氧物种 (ROS).
- 在小鼠和人类中,NAD+补充有效地逆转了ALDH2变异诱导的血小板过敏反应和血栓形成.
结论:
- ALDH2 rs671变体通过损害线粒体复合体I功能来促进原诱导的血小板激活和血栓形成.
- 补充NAD+是一种有前途的治疗方法,可以降低ALDH2 rs671变种患者的血栓形成风险.
相关概念视频
ATP Synthase: Mechanism
16.7K
In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased...
16.7K
Electron Transport Chain: Complex I and II
18.4K
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
ROS generation is regulated and maintained at moderate levels necessary...
18.4K
The Supercomplexes in the Crista Membrane
2.9K
The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
2.9K
ATP Synthase: Structure
15.1K
ATP synthase or ATPase is among the most conserved proteins found in bacteria, mammals, and plants. This enzyme can catalyze a forward reaction in response to the electrochemical gradient, producing ATP from ADP and inorganic phosphate. ATP synthase can also work in a reverse direction by hydrolyzing ATP and generating an electrochemical gradient. Different forms of ATP synthases have evolved special features to meet the specific demands of the cell. Based on their specific feature, ATP...
15.1K
Porin Insertion in the Outer Mitochondrial Membrane
4.6K
Porins are beta-barrel proteins translocated to the mitochondrial outer membrane through the TOM complex into the intermembrane space. Porin precursors bind TIM chaperones within the intermembrane space and are guided to the Sorting and Assembly Machinery complex or SAM complex on the outer mitochondrial membrane.
Three models describe the assembly of porins by the SAM complex and their insertion into the outer membrane. Model 1 suggests that porins are assembled outside the SAM channel as the...
Three models describe the assembly of porins by the SAM complex and their insertion into the outer membrane. Model 1 suggests that porins are assembled outside the SAM channel as the...
4.6K
The Electron Transport Chain
19.6K
The electron transport chain or oxidative phosphorylation is an exothermic process in which free energy released during electron transfer reactions is coupled to ATP synthesis. This process is a significant source of energy in aerobic cells, and therefore inhibitors of the electron transport chain can be detrimental to the cell's metabolic processes.
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
19.6K


