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Optimal Long-term Antiplatelet Regimen for Patients with High Ischaemic and Bleeding Risks After Percutaneous Coronary Intervention. 经皮冠状动脉介入治疗后高缺血和出血风险患者的最佳长期抗血小板方案。
IF 5 2区 医学
Thrombosis and haemostasis Pub Date : 2025-08-01 Epub Date: 2024-12-10 DOI: 10.1055/a-2499-5458
Jeong Yoon Jang, Ga-In Yu, Jongwha Ahn, Jae-Suck Bae, Yun-Ho Cho, Min-Gyu Kang, Jin-Sin Koh, Young-Hoon Jeong, Sang Yeup Lee, Byeong-Keuk Kim, Hyung Joon Joo, Do-Sun Lim, Kiyuk Chang, Young Bin Song, Sung Gyun Ahn, Jung-Won Suh, Jung Rae Cho, Ae-Young Her, Jee-Hoon Kang, Hyo-Soo Kim, Moo Hyun Kim, Eun-Seok Shin, Yongwhi Park
{"title":"Optimal Long-term Antiplatelet Regimen for Patients with High Ischaemic and Bleeding Risks After Percutaneous Coronary Intervention.","authors":"Jeong Yoon Jang, Ga-In Yu, Jongwha Ahn, Jae-Suck Bae, Yun-Ho Cho, Min-Gyu Kang, Jin-Sin Koh, Young-Hoon Jeong, Sang Yeup Lee, Byeong-Keuk Kim, Hyung Joon Joo, Do-Sun Lim, Kiyuk Chang, Young Bin Song, Sung Gyun Ahn, Jung-Won Suh, Jung Rae Cho, Ae-Young Her, Jee-Hoon Kang, Hyo-Soo Kim, Moo Hyun Kim, Eun-Seok Shin, Yongwhi Park","doi":"10.1055/a-2499-5458","DOIUrl":"10.1055/a-2499-5458","url":null,"abstract":"<p><p>To assess an optimal long-term antiplatelet strategy in patients at both high ischaemic and bleeding risks after percutaneous coronary intervention (PCI).Patients at high risks of both ischaemia and bleeding were eligible for inclusion. We excluded patients with any ischaemic and major bleeding complications during the mandatory period of dual antiplatelet therapy (DAPT). Clinical outcomes were evaluated in three groups of regimens, namely, clopidogrel monotherapy (CLPD), aspirin monotherapy (ASA), and DAPT group. The primary endpoint was a composite of all-cause death, myocardial infarction, stroke, or major bleeding for 12-month follow-up period. To balance characteristics according to antiplatelet strategies, stabilized inverse probability treatment weighting (IPTW) was conducted. After IPTW adjustment, CLPD group (<i>N</i> = 916) showed significantly lower rate of primary endpoint than DAPT group (<i>N</i> = 949) (hazard ratio [HR] = 2.09, 95% confidence interval [CI] = 1.22-3.60, <i>p</i> = 0.008), but there was no statistical difference between CLPD and ASA groups (<i>N</i> = 838) (HR = 1.46, 95% CI = 0.83-2.54, <i>p</i> = 0.187). Clinical benefits of CLPD over DAPT was mainly driven by the lower incidence of ischemic events (HR = 2.51, 95% CI 1.37-4.61; <i>p</i> = 0.003). Incidence of major bleeding did not differ among groups, but there was an increased bleeding tendency in DAPT group compared to CLPD group (HR = 2.51, 95% CI = 0.85-7.41, <i>p</i> = 0.096).For patients at high bleeding and ischaemic risk, especially undergoing complex PCI, clopidogrel monotherapy demonstrated a significant net clinical benefit compared to DAPT. Clopidogrel monotherapy showed numerical reductions of bleeding and ischaemic event rates compared to aspirin monotherapy.</p>","PeriodicalId":23036,"journal":{"name":"Thrombosis and haemostasis","volume":" ","pages":"802-813"},"PeriodicalIF":5.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142808212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dabigatran Attenuates the Binding of Thrombin to Platelets-A Novel Mechanism of Action. 达比加群能减弱凝血酶与血小板的结合--这是一种新的作用机制。
IF 5 2区 医学
Thrombosis and haemostasis Pub Date : 2025-08-01 Epub Date: 2024-11-25 DOI: 10.1055/a-2483-0107
Tomas L Lindahl, Aishwarya Prasanna Kumar, Teresia Hallström, Ahmed Al-Hashimi, Anna du Rietz, Elena Arlaman, Kajsa Uvdal, Ankit S Macwan
{"title":"Dabigatran Attenuates the Binding of Thrombin to Platelets-A Novel Mechanism of Action.","authors":"Tomas L Lindahl, Aishwarya Prasanna Kumar, Teresia Hallström, Ahmed Al-Hashimi, Anna du Rietz, Elena Arlaman, Kajsa Uvdal, Ankit S Macwan","doi":"10.1055/a-2483-0107","DOIUrl":"10.1055/a-2483-0107","url":null,"abstract":"<p><p>Thrombin is a multifunctional regulatory enzyme of the haemostasis and has both pro- and anticoagulant roles. It has, therefore, been a main target for drug discovery over many decades. Thrombin is a serine protease and possesses two positively charged regions called exosites, through which it is known to bind to many substrates. Dabigatran is a thrombin inhibitor and is widely used as an oral anticoagulant for the antithrombotic treatment of atrial fibrillation and venous thromboembolism. The mechanism by which dabigatran inhibits thrombin is the blockage of the active site, however, its effect on thrombin binding to its substrates has not been studied thoroughly and is thus poorly understood.The effect of dabigatran on thrombin binding to platelets was evaluated by flow cytometry using fluorescently labelled thrombin and washed platelets. Further, to confirm the results we utilized modern techniques for biomolecular binding studies, microscale thermophoresis (MST) and surface plasmon resonance (SPR), which validated the results.Dabigatran inhibited thrombin binding to platelets as analysed by flow cytometry. The inhibition was dose dependent with IC50 of 118 nM which was slightly lower than for inhibition of platelet activation and is close to the clinically relevant plasma concentration of dabigatran. MST and SPR also confirmed inhibitory effect of dabigatran on thrombin binding to platelets.Apart from blocking the active site, dabigatran also inhibits thrombin binding to platelets. Since thrombin has numerous functions beyond the cardiovascular system, this finding may have important implications.</p>","PeriodicalId":23036,"journal":{"name":"Thrombosis and haemostasis","volume":" ","pages":"747-756"},"PeriodicalIF":5.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12283142/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142717070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multidisciplinary Expert Guidance for the Management of Severe Bleeding on Oral Anticoagulation: An Algorithm for Practicing Clinicians. 口服抗凝药治疗严重出血的多学科指导:口服抗凝药治疗严重出血的多学科指南:临床医师指南》。
IF 5 2区 医学
Thrombosis and haemostasis Pub Date : 2025-08-01 Epub Date: 2024-11-08 DOI: 10.1055/a-2464-2887
Siraj Mithoowani, Tammy Bungard, Lana Castellucci, Mark Crowther, Kerstin de Wit, Dar Dowlatshahi, Nauzer Forbes, Katie Lin, Deborah M Siegal
{"title":"Multidisciplinary Expert Guidance for the Management of Severe Bleeding on Oral Anticoagulation: An Algorithm for Practicing Clinicians.","authors":"Siraj Mithoowani, Tammy Bungard, Lana Castellucci, Mark Crowther, Kerstin de Wit, Dar Dowlatshahi, Nauzer Forbes, Katie Lin, Deborah M Siegal","doi":"10.1055/a-2464-2887","DOIUrl":"10.1055/a-2464-2887","url":null,"abstract":"<p><p>Bleeding complications associated with oral anticoagulant (OAC) frequently lead to emergency department visits and hospitalization. Short-term all-cause mortality after severe bleeding is substantial ranging from approximately 10% for gastrointestinal bleeding (the most frequent single site) to approximately 50% for intracranial bleeding. A protocol for multidisciplinary approach to bleeding is needed to (i) ensure rapid identification of patients at risk of adverse outcomes, (ii) optimize delivery of supportive measures, (iii) treat the source of bleeding, and (iv) administer anticoagulant reversal or hemostatic therapies judiciously for patients most likely to benefit. We convened a multidisciplinary panel of experts (emergency medicine, gastroenterology, general internal medicine, hematology, neurology, pharmacy, thrombosis) to review the literature and provide practical guidance including a corresponding algorithm for use at the point of care to assist clinicians in the management of patients with acute severe OAC-related bleeding.</p>","PeriodicalId":23036,"journal":{"name":"Thrombosis and haemostasis","volume":" ","pages":"717-732"},"PeriodicalIF":5.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12283145/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimizing Use of Antithrombotics and Overcoming Therapeutic Inertia: Lessons from the AEGIS Trial. 优化抗血栓药物的使用和克服治疗惰性:来自AEGIS试验的经验教训。
IF 5 2区 医学
Thrombosis and haemostasis Pub Date : 2025-08-01 Epub Date: 2025-06-10 DOI: 10.1055/a-2622-8652
Giulio Francesco Romiti
{"title":"Optimizing Use of Antithrombotics and Overcoming Therapeutic Inertia: Lessons from the AEGIS Trial.","authors":"Giulio Francesco Romiti","doi":"10.1055/a-2622-8652","DOIUrl":"10.1055/a-2622-8652","url":null,"abstract":"","PeriodicalId":23036,"journal":{"name":"Thrombosis and haemostasis","volume":" ","pages":"744-746"},"PeriodicalIF":5.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144267283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Real-Time Imaging of Platelet-Initiated Plasma Clot Formation and Lysis Unveils Distinct Impacts of Anticoagulants. 血小板引发的血浆凝块形成和溶解的实时成像揭示了抗凝剂的不同影响。
IF 5 2区 医学
Thrombosis and haemostasis Pub Date : 2025-08-01 Epub Date: 2025-01-09 DOI: 10.1055/a-2497-4213
Yuko Suzuki, Nitty S Mathews, Hideto Sano, Nanami Morooka, Naoki Honkura, Tetsumei Urano
{"title":"Real-Time Imaging of Platelet-Initiated Plasma Clot Formation and Lysis Unveils Distinct Impacts of Anticoagulants.","authors":"Yuko Suzuki, Nitty S Mathews, Hideto Sano, Nanami Morooka, Naoki Honkura, Tetsumei Urano","doi":"10.1055/a-2497-4213","DOIUrl":"10.1055/a-2497-4213","url":null,"abstract":"<p><p>Fibrinolysis is spatiotemporally well-regulated and greatly influenced by activated platelets and coagulation activity. Our previous real-time imaging analyses revealed that clotting commences on activated platelet surfaces, resulting in uneven-density fibrin structures, and that fibrinolysis initiates in dense fibrin regions and extends to the periphery. Despite the widespread clinical use of direct oral anticoagulants (DOACs), their impact on thrombin-dependent activation of thrombin-activatable fibrinolysis inhibitor (TAFI) and fibrinolysis remains unclear. Here, we investigated the effects of different DOACs on the TAFI-mediated inhibition of fibrinolysis.Using human platelet-containing plasma, we performed turbidimetric assays, thrombin generation assays, and confocal laser scanning microscopy to assess the effects of anticoagulants on fibrinolysis.Activated platelets-prolonged plasma clot lysis time, shortened by activated TAFI inhibitor (TAFIaI), positively correlated with the amount of thrombin generated. Rivaroxaban (an activated factor X inhibitor) and dabigatran (a direct thrombin inhibitor) dose-dependently shortened lysis time comparably. The highest concentration of DOACs showed no further shortening of lysis time with TAFIaI. The fibrin network structures initiated by activated platelets and the localization of fluorescently labeled plasminogen were unique for these two drugs. Rivaroxaban maintained an uneven fibrin network but promoted faster plasminogen accumulation and fibrinolysis from outside dense fibrin regions. Conversely, dabigatran resulted in a more even fibrin network, with fibrinolysis starting from the activated platelets and propagating to the periphery. Visualizing and analyzing the patterns of fibrin network formation, plasminogen accumulation, and fibrinolysis provide new insights into the specific impact of anticoagulants on coagulation and fibrinolysis.</p>","PeriodicalId":23036,"journal":{"name":"Thrombosis and haemostasis","volume":" ","pages":"766-778"},"PeriodicalIF":5.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12283144/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142955477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Association of Circulating Robo4 with Obesity, Hypertension and Atherosclerotic Plaque Burden. 循环中的 Robo4 与肥胖、高血压和动脉粥样硬化斑块负荷有关。
IF 5 2区 医学
Thrombosis and haemostasis Pub Date : 2025-08-01 Epub Date: 2024-10-14 DOI: 10.1055/a-2437-6308
Nikolaos I Vlachogiannis, Aigli-Ioanna Legaki, Eva Kassi, Constantinos M Mikelis, Nikolaos Tentolouris, Petros P Sfikakis, Athanase D Protogerou, Antonios Chatzigeorgiou
{"title":"Association of Circulating Robo4 with Obesity, Hypertension and Atherosclerotic Plaque Burden.","authors":"Nikolaos I Vlachogiannis, Aigli-Ioanna Legaki, Eva Kassi, Constantinos M Mikelis, Nikolaos Tentolouris, Petros P Sfikakis, Athanase D Protogerou, Antonios Chatzigeorgiou","doi":"10.1055/a-2437-6308","DOIUrl":"10.1055/a-2437-6308","url":null,"abstract":"","PeriodicalId":23036,"journal":{"name":"Thrombosis and haemostasis","volume":" ","pages":"817-820"},"PeriodicalIF":5.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142485900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Intervention to Reduce Antiplatelet Use without Gastroprotection in Patients Using Warfarin: The AEGIS Cluster Randomized Trial. 减少使用华法林患者无胃保护的抗血小板使用的干预:AEGIS集群随机试验。
IF 5 2区 医学
Thrombosis and haemostasis Pub Date : 2025-08-01 Epub Date: 2025-05-02 DOI: 10.1055/a-2544-6104
Jacob E Kurlander, Danielle Helminski, Xueting Tao, Sameer D Saini, Sarah L Krein, Caroline R Richardson, Kelley M Kidwell, Michael S M Lanham, Jennifer L Henstock, Jesse Resnick, Michael Song, Raymond De Vries, Kenneth Resnicow, Nghi Ha, Brian Haymart, Constantina Alexandris-Souphis, James B Froehlich, Geoffrey D Barnes
{"title":"An Intervention to Reduce Antiplatelet Use without Gastroprotection in Patients Using Warfarin: The AEGIS Cluster Randomized Trial.","authors":"Jacob E Kurlander, Danielle Helminski, Xueting Tao, Sameer D Saini, Sarah L Krein, Caroline R Richardson, Kelley M Kidwell, Michael S M Lanham, Jennifer L Henstock, Jesse Resnick, Michael Song, Raymond De Vries, Kenneth Resnicow, Nghi Ha, Brian Haymart, Constantina Alexandris-Souphis, James B Froehlich, Geoffrey D Barnes","doi":"10.1055/a-2544-6104","DOIUrl":"10.1055/a-2544-6104","url":null,"abstract":"<p><p>Many patients receiving anticoagulants take antiplatelet medications unnecessarily and without gastroprotection, increasing the risk of gastrointestinal bleeding.To evaluate the effectiveness of a multicomponent intervention-clinician notification with nurse facilitation (CNNF)-in reducing high-risk use of antiplatelet medications in patients taking warfarin without a proton pump inhibitor (PPI).For patients in the CNNF group, nurses sent electronic messages to clinicians identifying patients with high-risk antiplatelet use, recommending consideration of either antiplatelet discontinuation or PPI initiation, and offering to facilitate any medication changes. The primary outcome was the percentage of patients who self-reported either discontinuing antiplatelet therapy or initiating a PPI at 7 to 10 weeks. The secondary outcome was the percentage of patients with a documented clinician recommendation to make such a medication change.Among 220 patients, CNNF was associated with increased odds of discontinuing antiplatelet therapy or initiating a PPI in the intention-to-treat analysis (adjusted odds ratio [aOR] 5.76, 95% CI 2.54, 13.05). The effect was stronger in a modified completer analysis (<i>n</i> = 126, aOR 43.6, 95% CI 6.56, 289.88). The intervention was also associated with increased odds of a clinician recommendation for a medication change (75/110 [68.2%] versus 1/110 [0.9%], log aOR 19.86, 95% CI 10.63, 29.09). Surgeons and proceduralists were less likely to recommend medication changes relative to other clinicians (log aOR -16.08, 95% CI -23.34, -8.82).The multicomponent intervention effectively led to antiplatelet discontinuation or PPI initiation in patients initially prescribed warfarin-antiplatelet therapy without gastroprotection.</p>","PeriodicalId":23036,"journal":{"name":"Thrombosis and haemostasis","volume":" ","pages":"733-743"},"PeriodicalIF":5.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144014758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Brisk Walking Pace Offsets Venous Thromboembolism Risk Equivalent to Established Monogenic Mutations. 快走能抵消静脉血栓栓塞风险,与已确定的单基因突变相当。
IF 5 2区 医学
Thrombosis and haemostasis Pub Date : 2025-08-01 Epub Date: 2024-11-05 DOI: 10.1055/a-2461-3349
Wenyan Xian, Yifan Tao, Chong You, Ruinan Sun, Janice M Ranson, Valerio Napolioni, Patrick W C Lau, Jie Huang
{"title":"Brisk Walking Pace Offsets Venous Thromboembolism Risk Equivalent to Established Monogenic Mutations.","authors":"Wenyan Xian, Yifan Tao, Chong You, Ruinan Sun, Janice M Ranson, Valerio Napolioni, Patrick W C Lau, Jie Huang","doi":"10.1055/a-2461-3349","DOIUrl":"10.1055/a-2461-3349","url":null,"abstract":"<p><p>Mendelian mutations in the Prothrombin gene (<i>F2</i>) and the factor V Leiden gene (<i>F5</i>) genes are established risk factors for venous thromboembolism (VTE). Walking pace is associated with the risk of coronary artery diseases, but no study has investigated its association with VTE. This study aimed to investigate the association and causality between walking pace and VTE, compare its population risk with established Mendelian mutations, and determine if blood biomarkers mediate its effect.We followed up 445,261 UK Biobank participants free of VTE at baseline. Self-reported walking pace was collected via touchscreen questionnaire at baseline. The carrier status of two Mendelian mutations in <i>F2</i> and <i>F5</i> genes was determined by the genotypes of rs1799963 (G20210A, c.*97 G > A) and rs6025 (p.R534Q), respectively. Cox proportional hazard model was used to estimate the effect of walking pace on incident VTE. We conducted a bidirectional Mendelian randomization (MR) analysis, by using 70 single-nucleotide polymorphisms (SNPs) from a walking pace genome-wide association studies (GWAS) and 93 SNPs from a VTE GWAS as instrumental variables. We used both individual-level data and GWAS summary statistics for mediation analysis.Over a median follow-up period of 12.8 years, 11,155 incident VTE cases were identified. The 10-year incidence rates for brisk and slow walking pace were 1.32% (confidence interval [CI]: 1.27-1.37%) and 3.90% (CI: 3.71-4.09%), respectively. For noncarriers, <i>F2</i> and <i>F5</i> carriers, the 10-year incidence rates were 1.70% (CI: 1.66-1.73%), 2.94% (CI: 2.66-3.22%), and 3.62% (CI: 3.39-3.84%), respectively. The overall risk of VTE for <i>F5</i> mutation carriers with a brisk walking pace (2.65%) was smaller than that for noncarriers with a slow walking pace (3.66%). For <i>F5</i> mutation carriers, brisk pace (but not steady pace) reduces the risk of VTE (<i>p</i> interaction < 0.05). MR analyses displayed a causal relationship (inverse variance weighted: <i>p</i> = 3.21 × 10<sup>-5</sup>) from walking pace to VTE incidence. Mediation analysis showed that serum albumin (ALB) and cystatin C (CYS) levels partially mediated the effect of brisk walking pace on the risk of VTE incidence, with mediation proportions of 8.7 to 11.7%, respectively.On the population scale, the protective effect of brisk walking pace offsets the risk of VTE caused by Mendelian mutations. We provided preliminary evidence that a brisk walking pace causally reduces the risk of VTE. Serum ALB and CYS partially mediate this effect.</p>","PeriodicalId":23036,"journal":{"name":"Thrombosis and haemostasis","volume":" ","pages":"791-801"},"PeriodicalIF":5.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12283141/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142583534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distinct Role of GRK3 in Platelet Activation by Desensitization of G Protein-Coupled Receptors. GRK3在通过G蛋白偶联受体脱敏激活血小板过程中的独特作用
IF 5 2区 医学
Thrombosis and haemostasis Pub Date : 2025-08-01 Epub Date: 2024-10-17 DOI: 10.1055/a-2442-9031
Preeti K Chaudhary, Sanggu Kim, Satya P Kunapuli, Soochong Kim
{"title":"Distinct Role of GRK3 in Platelet Activation by Desensitization of G Protein-Coupled Receptors.","authors":"Preeti K Chaudhary, Sanggu Kim, Satya P Kunapuli, Soochong Kim","doi":"10.1055/a-2442-9031","DOIUrl":"10.1055/a-2442-9031","url":null,"abstract":"<p><p>Many platelet agonists mediate their cellular effects through G protein-coupled receptors (GPCRs) to induce platelet activation, and GPCR kinases (GRKs) have been demonstrated to have crucial roles in most GPCR functions in other cell types. Here, we investigated the functional role of GRK3 and the molecular basis for the regulation of GPCR desensitization by GRK3 in platelets.We used mice lacking GRK3 as well as β-arrestin2, which has been shown to be important in GPCR function in platelets.Platelet aggregation and dense granule secretion induced by 2-MeSADP, U46619, thrombin, and AYPGKF were significantly potentiated in both GRK3 -/- and β-arrestin2 -/- platelets compared with wild-type (WT) platelets, whereas non-GPCR agonist collagen-induced platelet aggregation and secretion were not affected. We have previously shown that GRK6 is not involved in the regulation of G<sub>q</sub>-coupled 5HT<sub>2A</sub> and G<sub>z</sub>-coupled α<sub>2A</sub> adrenergic receptors. Interestingly, in contrast to GRK6, platelet aggregation induced by costimulation of serotonin and epinephrine, which activate 5-HT<sub>2A</sub> and α<sub>2A</sub> adrenergic receptors, respectively, was significantly potentiated in GRK3 -/- platelets, suggesting that GRK3 is involved in general GPCR regulation. In addition, platelet aggregation in response to the second challenge of adenosine diphosphate was restored in GRK3 -/- platelets, whereas restimulation of the agonist failed to induce aggregation in WT platelets, confirming that GRK3 contributes to general GPCR desensitization. Furthermore, 2-MeSADP- and AYPGKF-induced AKT and ERK phosphorylation were significantly potentiated in GRK3 -/- platelets. Finally, GRK3 -/- mice showed shorter tail bleeding times compared with WT, indicating that GRK3 -/- mice is more susceptible to hemostasis.GRK3 plays a crucial role in the regulation of platelet activation through general GPCR desensitization in platelets.</p>","PeriodicalId":23036,"journal":{"name":"Thrombosis and haemostasis","volume":" ","pages":"779-790"},"PeriodicalIF":5.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142475430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Validity of Diagnosis of Disseminated Intravascular Coagulation Based on International Classification of Diseases Coding in a Claims Database. 根据理赔数据库中的国际疾病分类编码诊断弥散性血管内凝血的有效性。
IF 5 2区 医学
Thrombosis and haemostasis Pub Date : 2025-08-01 Epub Date: 2024-10-29 DOI: 10.1055/a-2453-7920
Yutaka Umemura, Kazuma Yamakawa, Hirotaka Mori, Kohji Okamoto, Jun Oda, Satoshi Fujimi
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