抑制GPD2通过ROS/NF-κB/P2Y12通路损害了凝血功能
Jiajie Chen1,2,3, Guifeng Xu4, Zhipeng Xie5
1Department of Pharmacy, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Southern Medical University, Guangzhou, Guangdong, China.
Cellular & molecular biology letters
|July 18, 2025
概括
GPD2基因 (cg03230175) 的DNA甲基化与冠状动脉心脏病患者的血小板功能受损和出血风险增加有关. 这一发现为个性化抗血小板治疗策略提供了洞察力.
科学领域:
- 表观遗传学和心血管疾病
- 药物基因组学和抗血小板治疗
- 血小板生物学和血液静止.
背景情况:
- 冠心病 (CHD) 管理依赖于抗血小板疗法,而提卡格雷勒是第一线药物.
- 个体间出血风险的变化使得提卡格雷勒的疗效复杂,部分原因是遗传因素.
- 可修改的表观遗传机制,如DNA甲基化,在血小板反应性和出血风险中的作用仍然未得到充分研究.
研究的目的:
- 为了研究血小板功能的表观遗传调节和心脏病患者的出血风险.
- 为了确定影响基因表达,血小板功能恢复和出血风险的特定DNA甲基化位点.
- 阐明分子机制,通过确定甲基化部位影响血小板功能和出血.
主要方法:
- 在47名健康对照组和93名心血管疾病患者中,使用850k甲基化阵列测量了DNA甲基化水平.
- 使用了全表观基因组关联研究 (EWAS),基于总结数据的门德尔随机化 (SMR) 和HEIDI分析.
- 一个向的细胞模型 (CRISPR-dCas9-DNMT3A/Tet1CD-U6-sgRNA) 和转录组序列被用于机械学研究,在动物模型中得到验证.
主要成果:
- 在GPD2基因促进体CpG位点CG03230175的高甲基化与GPD2表达的降低,血小板恢复的延迟和出血风险的增加相关.
- GPD2甲基化影响线粒体功能,NF-κB信号传递,活性氧物种 (ROS) 代谢和GPCR连接体结合.
- 细胞模型显示,GPD2甲基化抑制ROS产生,NF-κB激活和P2Y12表达,抑制凝血;动物研究证实,GPD2抑制延长了凝血时间.
结论:
- GPD2基因 (cg03230175) 甲基化减少了GPD2的表达,损害了线粒体能量代谢,降低了ROS水平,并通过NF-κB通路影响了P2Y12的表达.
- 这种甲基化最终会抑制凝血功能,导致心血管疾病患者出血风险变化.
- 这些发现突出了针对GPD2甲基化的潜力,以优化心脏病中抗血小板策略.
相关概念视频
Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors
648
Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
648
GPCRs Regulate Adenylyl Cylase Activity
5.9K
Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
5.9K
Anticoagulant Drugs: Low-Molecular-Weight Heparins
913
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
913
Extrinsic and Intrinsic Pathways of Hemostasis
9.2K
Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
9.2K
GPCR Desensitization
6.5K
G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...
6.5K
Clot Retraction and Fibrinolysis
6.9K
After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
6.9K


