PAI-1, plasminogen activator inhibitor-1

PAI - 1, 纤溶酶原激活物抑制剂 - 1
  • 文章类型: Journal Article
    未经证实:Efruxifermin已在非酒精性脂肪性肝炎(NASH)和F1-F3纤维化患者中显示出临床疗效。BALANCED队列C的主要目的是评估代偿性NASH肝硬化患者使用依fruxifermin的安全性和耐受性。
    UNASSIGNED:将NASH和4期纤维化患者(n=30)随机分为2:1,每周一次接受Efruxifermin50mg(n=20)或安慰剂(n=10),共16周。主要终点是依fruxifermin的安全性和耐受性。次要和探索性终点包括评估肝损伤和纤维化的非侵入性标志物,葡萄糖和脂质代谢,部分同意接受研究结束肝活检的患者的组织学变化。
    UNASSIGNED:Efruxifermin安全且耐受性良好;大多数不良事件(AE)为1级(n=7,23.3%)或2级(n=19,63.3%)。最常见的AE是胃肠道,包括瞬态,轻度至中度腹泻,和/或恶心。在肝损伤(丙氨酸氨基转移酶)以及葡萄糖和脂质代谢的关键标志物中发现了显着改善。efruxifermin治疗16周与包括Pro-C3在内的非侵入性纤维化标志物的显着减少相关(从基线[LSMCFB]-9μg/Lefruxiferminvs.-3.4μg/L安慰剂;p=0.0130)和ELF评分(-0.4efruxiferminvs.+0.4安慰剂;p=0.0036),具有降低肝脏硬度的趋势(LSMCBB-5.7kPaefruxifermin与-1.1kPa安慰剂;n.s.)。在16周后接受肝活检的12名依弗西敏治疗的患者中,4(33%)实现了至少一个阶段的纤维化改善,而NASH没有恶化,而另外3人(25%)获得了NASH的分辨率,与5例安慰剂治疗患者中的0例相比。
    未经证实:Efruxifermin表现出安全和良好的耐受性,在肝损伤标志物方面有令人鼓舞的改善,纤维化,和糖和脂质代谢后16周的治疗,保证在更大和更长期的研究中得到证实。
    未经批准:非酒精性脂肪性肝炎(NASH)引起的肝硬化,非酒精性脂肪性肝病的进行性形式,代表了重大的未满足的医疗需求。目前没有批准的用于治疗NASH的药物。这个概念证明是随机的,双盲临床试验表明,在NASH肝硬化患者中,与安慰剂相比,依弗西汀治疗具有潜在的治疗益处.
    未经评估:NCT03976401。
    UNASSIGNED: Efruxifermin has shown clinical efficacy in patients with non-alcoholic steatohepatitis (NASH) and F1-F3 fibrosis. The primary objective of the BALANCED Cohort C was to assess the safety and tolerability of efruxifermin in patients with compensated NASH cirrhosis.
    UNASSIGNED: Patients with NASH and stage 4 fibrosis (n = 30) were randomized 2:1 to receive efruxifermin 50 mg (n = 20) or placebo (n = 10) once-weekly for 16 weeks. The primary endpoint was safety and tolerability of efruxifermin. Secondary and exploratory endpoints included evaluation of non-invasive markers of liver injury and fibrosis, glucose and lipid metabolism, and changes in histology in a subset of patients who consented to end-of-study liver biopsy.
    UNASSIGNED: Efruxifermin was safe and well-tolerated; most adverse events (AEs) were grade 1 (n = 7, 23.3%) or grade 2 (n = 19, 63.3%). The most frequent AEs were gastrointestinal, including transient, mild to moderate diarrhea, and/or nausea. Significant improvements were noted in key markers of liver injury (alanine aminotransferase) and glucose and lipid metabolism. Sixteen-week treatment with efruxifermin was associated with significant reductions in non-invasive markers of fibrosis including Pro-C3 (least squares mean change from baseline [LSMCFB] -9 μg/L efruxifermin vs. -3.4 μg/L placebo; p = 0.0130) and ELF score (-0.4 efruxifermin vs. +0.4 placebo; p = 0.0036), with a trend towards reduced liver stiffness (LSMCFB -5.7 kPa efruxifermin vs. -1.1 kPa placebo; n.s.). Of 12 efruxifermin-treated patients with liver biopsy after 16 weeks, 4 (33%) achieved fibrosis improvement of at least one stage without worsening of NASH, while an additional 3 (25%) achieved resolution of NASH, compared to 0 of 5 placebo-treated patients.
    UNASSIGNED: Efruxifermin appeared safe and well-tolerated with encouraging improvements in markers of liver injury, fibrosis, and glucose and lipid metabolism following 16 weeks of treatment, warranting confirmation in larger and longer term studies.
    UNASSIGNED: Cirrhosis resulting from non-alcoholic steatohepatitis (NASH), the progressive form of non-alcoholic fatty liver disease, represents a major unmet medical need. Currently there are no approved drugs for the treatment of NASH. This proof-of-concept randomized, double-blind clinical trial demonstrated the potential therapeutic benefit of efruxifermin treatment compared to placebo in patients with cirrhosis due to NASH.
    UNASSIGNED: NCT03976401.
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  • 文章类型: Journal Article
    肝硬化中的细菌感染与出血风险增加相关。评估细菌感染患者出血倾向的因素,我们进行了一项前瞻性研究,比较了止血的所有三个方面(血小板,凝血,和纤维蛋白溶解)在失代偿期肝硬化住院患者中与没有细菌感染。
    初级止血评估包括全血血小板聚集和血管性血友病因子(VWF)。凝血评估包括促凝血因子(纤维蛋白原,因素二,V,VII,VIII,IX,X,XI,XII,XIII),天然抗凝剂(蛋白C,蛋白质S,抗凝血酶)和血栓调节蛋白修饰的凝血酶生成试验。纤溶评估包括纤溶因子(纤溶酶原,t-PA,PAI-1,α2-AP,TAFIa/ai)和纤溶酶-抗纤溶酶复合物(PAP)。
    包括80例失代偿期肝硬化患者(40例合并细菌感染,40例无细菌感染)。各组间肝硬化严重程度和血小板计数具有可比性。在基线,肝硬化和细菌感染患者的全血血小板聚集显著降低,VWF无显著差异。关于凝血,细菌感染与促凝血因子VII和XII减少有关,以及所有天然抗凝剂的显著减少。然而,血栓调节蛋白修饰的凝血酶产生在研究组之间具有可比性.最后,尽管在细菌感染中存在潜在的低纤溶(低纤溶酶原)和高纤溶(高t-PA)混合变化,两组的PAP水平具有可比性.感染消退后(n=29/40),血小板聚集进一步恶化,而凝血和纤溶因子恢复至无细菌感染患者的水平.
    在失代偿期肝硬化住院患者中,细菌感染与全血血小板聚集减少和所有天然抗凝剂的显著减少有关,这可能会使止血失衡,并可能增加出血和血栓形成的风险。
    细菌感染是失代偿期肝硬化住院患者(即由于晚期慢性肝病的严重并发症而住院的患者)的常见问题。发生感染的失代偿性肝硬化患者在侵入性手术(即身体被穿透或进入的手术,例如通过针或管子)。由于失代偿期肝硬化的出血并发症与进一步失代偿和死亡的高风险相关,迫切需要了解导致这种出血趋势增加的因素。在这里,我们调查了失代偿期肝硬化和细菌感染患者的止血变化(这是导致凝块形成和稳定的生理过程)。我们发现,这些患者中细菌感染的发展与止血(尤其是血小板和凝血级联反应)的改变有关,这可能会增加出血和血栓并发症的风险。
    UNASSIGNED: Bacterial infections in cirrhosis are associated with increased bleeding risk. To assess the factors responsible for bleeding tendency in patients with bacterial infections, we conducted a prospective study comparing all 3 aspects of hemostasis (platelets, coagulation, and fibrinolysis) in hospitalized patients with decompensated cirrhosis with vs. without bacterial infections.
    UNASSIGNED: Primary hemostasis assessment included whole blood platelet aggregation and von Willebrand factor (VWF). Coagulation assessment included procoagulant factors (fibrinogen, factor II, V, VII, VIII, IX, X, XI, XII, XIII), natural anticoagulants (protein C, protein S, antithrombin) and thrombomodulin-modified thrombin generation test. Fibrinolysis assessment included fibrinolytic factors (plasminogen, t-PA, PAI-1, α2-AP, TAFIa/ai) and plasmin-antiplasmin complex (PAP).
    UNASSIGNED: Eighty patients with decompensated cirrhosis were included (40 with and 40 without bacterial infections). Severity of cirrhosis and platelet count were comparable between groups. At baseline, patients with cirrhosis and bacterial infections had significantly lower whole blood platelet aggregation, without significant differences in VWF. Regarding coagulation, bacterial infections were associated with reduced procoagulant factors VII and XII, and a significant reduction of all natural anticoagulants. However, thrombomodulin-modified thrombin generation was comparable between the study groups. Finally, although mixed potentially hypo-fibrinolytic (lower plasminogen) and hyper-fibrinolytic (higher t-PA) changes were present in bacterial infections, a comparable level of PAP was detected in both groups. Upon resolution of infection (n = 29/40), platelet aggregation further deteriorated whereas coagulation and fibrinolysis factors returned to levels observed in patients without bacterial infections.
    UNASSIGNED: In hospitalized patients with decompensated cirrhosis, bacterial infections are associated with reduced whole blood platelet aggregation and a significant decrease of all natural anticoagulants, which may unbalance hemostasis and potentially increase the risk of both bleeding and thrombosis.
    UNASSIGNED: Bacterial infections are a common issue in hospitalized patients with decompensated cirrhosis (i.e. patients hospitalized due to severe complications of advanced chronic liver disease). Patients with decompensated cirrhosis who acquire infections may be at increased risk of bleeding complications following invasive procedures (that is a procedure in which the body is penetrated or entered, for instance by a needle or a tube). As bleeding complications in decompensated cirrhosis are associated with a high risk of further decompensation and death, there is an urgent need to understand the factors responsible for such increased bleeding tendency. Herein, we investigated the alterations of hemostasis (that is the physiological process responsible for clot formation and stability) in patients with decompensated cirrhosis and bacterial infections. We found that development of bacterial infections in these patients is associated with alterations of hemostasis (particularly of platelets and clotting cascade) that may increase the risk of both bleeding and thrombotic complications.
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  • 文章类型: Journal Article
    转化生长因子-β(TGF-β)是肝脏中的有效效应,它参与了肝损伤后启动的过多过程。TGF-β影响实质,非实质,和炎症细胞高度依赖环境的方式。其生物利用度对于对各种侮辱的快速反应是至关重要的。在肝脏中-可能在其他器官中-通过将大部分TGF-β作为称为潜伏TGF-β(L-TGF-β)的灭活前体形式在细胞外基质中沉积而成为可能。几种基质蛋白参与基质沉积,潜在的复杂稳定,和L-TGF-β的激活。细胞外基质蛋白1(ECM1)最近被认为是维持健康肝脏中沉积的L-TGF-β潜伏期的关键因素。的确,它的耗竭导致自发的TGF-β信号激活,对肝脏结构和功能产生有害影响.这篇综述文章介绍了细胞内L-TGF-β复合物形成的最新知识,分泌,基质沉积,和激活,并描述了所涉及的蛋白质和过程。Further,我们强调了下调肝纤维化和肝癌中L-TGF-β活化的治疗潜力。
    Transforming growth factor-β (TGF-β) is a potent effector in the liver, which is involved in a plethora of processes initiated upon liver injury. TGF-β affects parenchymal, non-parenchymal, and inflammatory cells in a highly context-dependent manner. Its bioavailability is critical for a fast response to various insults. In the liver - and probably in other organs - this is made possible by the deposition of a large portion of TGF-β in the extracellular matrix as an inactivated precursor form termed latent TGF-β (L-TGF-β). Several matrisomal proteins participate in matrix deposition, latent complex stabilisation, and activation of L-TGF-β. Extracellular matrix protein 1 (ECM1) was recently identified as a critical factor in maintaining the latency of deposited L-TGF-β in the healthy liver. Indeed, its depletion causes spontaneous TGF-β signalling activation with deleterious effects on liver architecture and function. This review article presents the current knowledge on intracellular L-TGF-β complex formation, secretion, matrix deposition, and activation and describes the proteins and processes involved. Further, we emphasise the therapeutic potential of toning down L-TGF-β activation in liver fibrosis and liver cancer.
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  • 文章类型: Journal Article
    二恶英样分子与内分泌干扰和肝脏疾病有关。为了更好地理解芳烃受体(AHR)生物学,在该受体的配体激活或全身遗传消融后,对小鼠进行了代谢表型分析和肝脏蛋白质组学.雄性野生型(WT)和Ahr-/-小鼠(Taconic)饲喂对照饮食并暴露于3,3',4,4\',5-五氯联苯(PCB126)(61nmol/kg,通过管饲法)或媒介物,持续两周。PCB126增加了WT中经典AHR靶标(Cyp1a1和Cyp1a2)的表达,但不增加Ahr-/-。敲除后肥胖增加,糖耐量降低;肝脏变小,脂肪变性和perilipin-2增加;矛盾的是血脂降低。PCB126与Ahr-/-中的肝甘油三酯增加有关。Ahr-/-基因型对肝脏蛋白质组的影响比配体激活更大,但顶级基因本体论(GO)过程相似。PCB126相关的肝脏蛋白质组是Ahr依赖性的。Ahr主要调节肝脏代谢(例如,脂质,外源性物质,有机酸)和生物能学,但它也会影响肝脏内分泌反应(例如,胰岛素受体)和功能,包括生产类固醇,肝细胞因子,和信息素结合蛋白。这些作用可能是通过相互作用转录因子或microRNA间接介导的。AHR及其配体的生物学作用需要在肝脏代谢健康和疾病方面进行更多的研究。
    Dioxin-like molecules have been associated with endocrine disruption and liver disease. To better understand aryl hydrocarbon receptor (AHR) biology, metabolic phenotyping and liver proteomics were performed in mice following ligand-activation or whole-body genetic ablation of this receptor. Male wild type (WT) and Ahr -/- mice (Taconic) were fed a control diet and exposed to 3,3\',4,4\',5-pentachlorobiphenyl (PCB126) (61 nmol/kg by gavage) or vehicle for two weeks. PCB126 increased expression of canonical AHR targets (Cyp1a1 and Cyp1a2) in WT but not Ahr -/-. Knockouts had increased adiposity with decreased glucose tolerance; smaller livers with increased steatosis and perilipin-2; and paradoxically decreased blood lipids. PCB126 was associated with increased hepatic triglycerides in Ahr -/-. The liver proteome was impacted more so by Ahr -/- genotype than ligand-activation, but top gene ontology (GO) processes were similar. The PCB126-associated liver proteome was Ahr-dependent. Ahr principally regulated liver metabolism (e.g., lipids, xenobiotics, organic acids) and bioenergetics, but it also impacted liver endocrine response (e.g., the insulin receptor) and function, including the production of steroids, hepatokines, and pheromone binding proteins. These effects could have been indirectly mediated by interacting transcription factors or microRNAs. The biologic roles of the AHR and its ligands warrant more research in liver metabolic health and disease.
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  • 文章类型: Journal Article
    最近,Nrf2/HO-1作为细胞内防御氧化应激的主要调控途径受到广泛关注,被认为是减轻内皮细胞损伤的理想靶点。
    本文旨在总结在ECs中潜在发挥抗氧化应激保护作用的天然单体/提取物。
    对我们的主题进行了文献检索,关键词为“动脉粥样硬化”或“Nrf2/HO-1”或“血管内皮细胞”或“氧化应激”或“草药”或“天然产物”或“天然提取物”或“天然化合物”或“中药”,基于草药经典书籍和科学数据库,包括Pubmed,SciFinder,Scopus,WebofScience,GoogleScholar,BaiduScholar,和其他人。然后,我们分析了不同类型的天然化合物通过保护血管内皮细胞免受氧化应激来治疗动脉粥样硬化的可能分子机制。此外,讨论了未来可能的研究前景。
    这些在ECs中对氧化应激具有保护作用的药物主要包括苯丙素类化合物,黄酮类化合物,萜类化合物,和生物碱。这些药物中的大多数缓解了由于氧化应激导致的ECs细胞凋亡,并且该机制与Nrf2/HO-1信令激活有关。然而,尽管通过激活Nrf2/HO-1信号发挥针对EC损伤的保护作用的天然药物的各个方面的研究不断取得进展,基于这些药物开发治疗动脉粥样硬化(AS)和其他心血管疾病的新药需要更详细的临床前和临床研究.
    我们的本文提供了通过激活Nrf2/HO-1对ECs抵抗氧化应激具有保护活性的天然试剂的最新信息。我们希望这篇综述将为进一步开发用于治疗AS和其他CVD的天然药物的新型候选药物提供一些方向。
    Recently, Nrf2/HO-1 has received extensive attention as the main regulatory pathway of intracellular defense against oxidative stress and is considered an ideal target for alleviating endothelial cell (EC) injury.
    This paper aimed to summarized the natural monomers/extracts that potentially exert protective effects against oxidative stress in ECs.
    A literature search was carried out regarding our topic with the keywords of \"atherosclerosis\" or \"Nrf2/HO-1\" or \"vascular endothelial cells\" or \"oxidative stress\" or \"Herbal medicine\" or \"natural products\" or \"natural extracts\" or \"natural compounds\" or \"traditional Chinese medicines\" based on classic books of herbal medicine and scientific databases including Pubmed, SciFinder, Scopus, the Web of Science, GoogleScholar, BaiduScholar, and others. Then, we analyzed the possible molecular mechanisms for different types of natural compounds in the treatment of atherosclerosis via the protection of vascular endothelial cells from oxidative stress. In addition, perspectives for possible future studies are discussed.
    These agents with protective effects against oxidative stress in ECs mainly include phenylpropanoids, flavonoids, terpenoids, and alkaloids. Most of these agents alleviate cell apoptosis in ECs due to oxidative stress, and the mechanisms are related to Nrf2/HO-1 signaling activation. However, despite continued progress in research on various aspects of natural agents exerting protective effects against EC injury by activating Nrf2/HO-1 signaling, the development of new drugs for the treatment of atherosclerosis (AS) and other CVDs based on these agents will require more detailed preclinical and clinical studies.
    Our present paper provides updated information of natural agents with protective activities on ECs against oxidative stress by activating Nrf2/HO-1. We hope this review will provide some directions for the further development of novel candidate drugs from natural agents for the treatment of AS and other CVDs.
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  • 文章类型: Journal Article
    糖尿病肾病(DN)是糖尿病的严重并发症,是终末期肾病的主要病因,这给全世界的人类社会造成了严重的健康问题和巨大的经济负担。常规战略,如肾素-血管紧张素-醛固酮系统阻断,血糖水平控制,和减轻体重,在许多DN管理的临床实践中,可能无法获得令人满意的结果。值得注意的是,由于多目标函数,中药作为DN治疗的主要或替代疗法具有很好的临床益处。越来越多的研究强调确定中药的生物活性化合物和肾脏保护作用的分子机制。参与糖/脂代谢调节的信号通路,抗氧化,抗炎,抗纤维化,足细胞保护已被确定为重要的作用机制。在这里,在回顾临床试验结果后,我们总结了中药及其生物活性成分在治疗和管理DN中的临床疗效,系统评价,和荟萃分析,对动物和细胞实验中报道的相关潜在机制和分子靶标进行了彻底讨论。我们旨在全面了解中药对DN的保护作用。
    Diabetic nephropathy (DN) has been recognized as a severe complication of diabetes mellitus and a dominant pathogeny of end-stage kidney disease, which causes serious health problems and great financial burden to human society worldwide. Conventional strategies, such as renin-angiotensin-aldosterone system blockade, blood glucose level control, and bodyweight reduction, may not achieve satisfactory outcomes in many clinical practices for DN management. Notably, due to the multi-target function, Chinese medicine possesses promising clinical benefits as primary or alternative therapies for DN treatment. Increasing studies have emphasized identifying bioactive compounds and molecular mechanisms of reno-protective effects of Chinese medicines. Signaling pathways involved in glucose/lipid metabolism regulation, antioxidation, anti-inflammation, anti-fibrosis, and podocyte protection have been identified as crucial mechanisms of action. Herein, we summarize the clinical efficacies of Chinese medicines and their bioactive components in treating and managing DN after reviewing the results demonstrated in clinical trials, systematic reviews, and meta-analyses, with a thorough discussion on the relative underlying mechanisms and molecular targets reported in animal and cellular experiments. We aim to provide comprehensive insights into the protective effects of Chinese medicines against DN.
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  • 文章类型: Journal Article
    小干扰RNA(siRNA)的使用一直在研究中,用于治疗几种未满足的医疗需求。例如包括急性肺损伤/急性呼吸窘迫综合征(ALI/ARDS),其中可实施siRNA以在mRNA水平上修饰促炎细胞因子和趋化因子的表达。清晰的解剖结构,可访问性,和相对较低的酶活性使肺成为局部siRNA治疗的良好靶标。然而,由于裸siRNA的特性,siRNA治疗剂向靶细胞的低效递送阻碍了siRNA的临床翻译。因此,本综述将重点介绍在ALI/ARDS的siRNA治疗药物进入临床之前,可使用的各种给药系统和需要克服的不同障碍,以开发用于人类的稳定可吸入siRNA制剂.
    The use of small interfering RNAs (siRNAs) has been under investigation for the treatment of several unmet medical needs, including acute lung injury/acute respiratory distress syndrome (ALI/ARDS) wherein siRNA may be implemented to modify the expression of pro-inflammatory cytokines and chemokines at the mRNA level. The properties such as clear anatomy, accessibility, and relatively low enzyme activity make the lung a good target for local siRNA therapy. However, the translation of siRNA is restricted by the inefficient delivery of siRNA therapeutics to the target cells due to the properties of naked siRNA. Thus, this review will focus on the various delivery systems that can be used and the different barriers that need to be surmounted for the development of stable inhalable siRNA formulations for human use before siRNA therapeutics for ALI/ARDS become available in the clinic.
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  • 文章类型: Journal Article
    SARS-CoV-2感染与血栓性和微血管并发症有关。该疾病中凝血病的原因尚不完全清楚。
    一项单中心横断面研究,包括66名成人COVID-19患者(40名中度,26严重疾病),和9个控件,在2020年04月至2020年10月期间执行。凝血标志物,内皮细胞功能[血管生成素-1,-2,P-选择素,vonWillebrand因子抗原(WF:Ag),vonWillebrand因子Ristocetin辅因子,ADAMTS13,血栓调节蛋白,可溶性内皮细胞蛋白C受体(sEPCR),组织因子途径抑制剂],中性粒细胞活化(弹性蛋白酶,瓜氨酸化组蛋白)和纤维蛋白溶解(组织型纤溶酶原激活剂,纤溶酶原激活物抑制剂-1)使用ELISA进行评估。通过抗凝血酶-FVIIa复合物(AT/FVIIa)和微粒-TF(MP-TF)估计组织因子(TF)。我们对每个标记进行关联并确定其与严重程度的关联。肺TF的表达,9例尸检通过免疫组织化学测定血栓调节蛋白和EPCR。
    合并症在两组中都很常见,年龄较大与严重疾病相关。所有患者均使用预防性抗凝剂。3例(4.5%)发生肺栓塞。死亡率为7.5%。患者的凝血图表现为轻度改变(补偿状态)。内皮细胞生物标志物,重度与中度疾病患者中性粒细胞活化和纤溶反应升高;重度患者AT/FVIIa和MP-TF水平较高.Logistic回归显示D-二聚体的关联,血管生成素-1,vWF:Ag,血栓调节蛋白,白细胞,中性粒细胞绝对计数(ANC)和血红蛋白水平与严重程度,以ANC和vWF:Ag为独立因素。值得注意的是,尸检标本显示,致命性COVID-19患者的肺中TF的上皮表达,暗示向促凝血状态转变。
    凝血失调在SARS-Cov-2感染中具有多因素病因。随着血栓调节蛋白的丢失,肺TF的上调成为与免疫血栓形成的潜在联系,和疾病的治疗目标。
    约翰·霍普金斯大学医学院。
    UNASSIGNED: SARS-CoV-2 infection is associated with thrombotic and microvascular complications. The cause of coagulopathy in the disease is incompletely understood.
    UNASSIGNED: A single-center cross-sectional study including 66 adult COVID-19 patients (40 moderate, 26 severe disease), and 9 controls, performed between 04/2020 and 10/2020. Markers of coagulation, endothelial cell function [angiopoietin-1,-2, P-selectin, von Willebrand Factor Antigen (WF:Ag), von Willebrand Factor Ristocetin Cofactor, ADAMTS13, thrombomodulin, soluble Endothelial cell Protein C Receptor (sEPCR), Tissue Factor Pathway Inhibitor], neutrophil activation (elastase, citrullinated histones) and fibrinolysis (tissue-type plasminogen activator, plasminogen activator inhibitor-1) were evaluated using ELISA. Tissue Factor (TF) was estimated by antithrombin-FVIIa complex (AT/FVIIa) and microparticles-TF (MP-TF). We correlated each marker and determined its association with severity. Expression of pulmonary TF, thrombomodulin and EPCR was determined by immunohistochemistry in 9 autopsies.
    UNASSIGNED: Comorbidities were frequent in both groups, with older age associated with severe disease. All patients were on prophylactic anticoagulants. Three patients (4.5%) developed pulmonary embolism. Mortality was 7.5%. Patients presented with mild alterations in the coagulogram (compensated state). Biomarkers of endothelial cell, neutrophil activation and fibrinolysis were elevated in severe vs moderate disease; AT/FVIIa and MP-TF levels were higher in severe patients. Logistic regression revealed an association of D-dimers, angiopoietin-1, vWF:Ag, thrombomodulin, white blood cells, absolute neutrophil count (ANC) and hemoglobin levels with severity, with ANC and vWF:Ag identified as independent factors. Notably, postmortem specimens demonstrated epithelial expression of TF in the lung of fatal COVID-19 cases with loss of thrombomodulin staining, implying in a shift towards a procoagulant state.
    UNASSIGNED: Coagulation dysregulation has multifactorial etiology in SARS-Cov-2 infection. Upregulation of pulmonary TF with loss of thrombomodulin emerge as a potential link to immunothrombosis, and therapeutic targets in the disease.
    UNASSIGNED: John Hopkins University School of Medicine.
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  • 文章类型: Journal Article
    比较对新辅助化疗反应不同的患者的脂肪和肌肉组织区域。
    回顾性研究纳入了在2015年1月至2019年10月期间接受新辅助化疗并在治疗后进行手术的186例乳腺癌患者。使用Miller-Payne分级系统将病理结果分为五组。1级表明恶性细胞没有显著减少;2级:恶性细胞的轻微损失(≤30%);3级:恶性细胞减少30%至90%;4级:恶性细胞消失>90%;5级:没有可识别的恶性细胞。治疗前PETCT扫描进行评估,在穿过L3椎骨的单个轴向截面上进行身体成分参数的计算。采用Spearman相关检验分析SAT之间的相关性,VAT,MT参数和病理反应。
    根据新辅助化疗治疗反应和组织分布,5组之间没有强相关性。然而,发现浅表脂肪组织与病理反应之间的相关性很低(r=,156).
    总而言之,我们的结果提供了一个非常低的相关性SAT和超过30%的响应。需要更多的研究来评估体脂和肌肉参数在更大的患者人群中对新辅助化疗的反应中的作用。
    UNASSIGNED: To compare the adipose and muscle tissue areas in patients who responded differently to neoadjuvant chemotherapy.
    UNASSIGNED: One hundred and eighty six patients diagnosed with breast cancer who underwent neoadjuvant chemotherapy between January 2015- October 2019 and were operated after the treatment were retrospectively included in the study. Pathological results were divided into five groups using the Miller-Payne grading systems. Grade 1 indicating no significant reduction in malignant cells; Grade 2: a minor loss of malignant cells (≤ 30 %); Grade 3: reduction in malignant cells between 30 % and 90 %; Grade 4: disappearance of malignant cells >90 %; Grade 5: no malignant cells identifiable. Pre-treatment PET CT scans were evaluated, and calculation of body composition parameters were performed on a single axial section passing through the L3 vertebrae. Spearman\'s correlation test was used to analyze the correlation between SAT, VAT, MT parameters and pathological responses.
    UNASSIGNED: There was no strong correlation between the 5 groups separated according to neoadjuvant chemotherapy treatment response and tissue distributions. However, that there was a very low correlation found between superficial adipose tissue and pathological response (r=, 156).
    UNASSIGNED: In conclusion, our results have provided a very low correlation between SAT and more than 30 % response. More research is required to evaluate the role of the body fat and muscle parameters in response to neoadjuvant chemotherapy in larger patient populations.
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  • 文章类型: Journal Article
    哺乳动物的昼夜节律和睡眠-觉醒系统通过其对日常活动模式的协调调节而紧密地对齐。尽管它们的解剖组织和生理过程不同,它们利用重叠的调节机制,包括在细胞外空间内相互作用的蛋白质和分子的分类。这些细胞外因子包括与可溶性蛋白质相互作用的蛋白酶,膜附着受体和细胞外基质;以及可以形成连接相邻神经元的复杂支架的细胞粘附分子,星形胶质细胞和它们各自的细胞内细胞骨架元件。星形胶质细胞还通过调节神经元的并置参与两个系统的动态调节,细胞外空间和/或通过释放可以进一步促进细胞外信号传导过程的胶质细胞递质。一起,这些细胞外元素创建了一个系统,该系统在更长的时间范围内整合了快速的神经递质信号,从而调整神经元信号以反映这两个系统的基本日常波动。在这里,我们回顾了关于这些细胞外过程的已知信息,特别关注两个系统之间的重叠区域。我们还强调仍然需要解决的问题。虽然我们知道许多细胞外参与者,需要更多的研究来了解它们调节昼夜节律和睡眠-觉醒系统的机制。
    The mammalian circadian and sleep-wake systems are closely aligned through their coordinated regulation of daily activity patterns. Although they differ in their anatomical organization and physiological processes, they utilize overlapping regulatory mechanisms that include an assortment of proteins and molecules interacting within the extracellular space. These extracellular factors include proteases that interact with soluble proteins, membrane-attached receptors and the extracellular matrix; and cell adhesion molecules that can form complex scaffolds connecting adjacent neurons, astrocytes and their respective intracellular cytoskeletal elements. Astrocytes also participate in the dynamic regulation of both systems through modulating neuronal appositions, the extracellular space and/or through release of gliotransmitters that can further contribute to the extracellular signaling processes. Together, these extracellular elements create a system that integrates rapid neurotransmitter signaling across longer time scales and thereby adjust neuronal signaling to reflect the daily fluctuations fundamental to both systems. Here we review what is known about these extracellular processes, focusing specifically on areas of overlap between the two systems. We also highlight questions that still need to be addressed. Although we know many of the extracellular players, far more research is needed to understand the mechanisms through which they modulate the circadian and sleep-wake systems.
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