Dihydrocapsaicin-induced angiogenesis and improved functional recovery after cerebral ischemia and reperfusion in a rat model

This study investigated the long-term effects of dihydrocapsaicin (DHC)-induced angiogenesis and improved functional outcomes in cerebral ischemia and reperfusion (I/R) rats. Middle cerebral artery occlusion was induced in I/R rats for 2 h, followed by reperfusion. The animals were divided into three groups: sham, I/R + vehicle, and I/R + DHC (10 mg/kg body weight). Fourteen days after I/R injury, the DHC-treated I/R rats had decreased neurological deficit scores, infarct volume, and brain morphology changes. DHC-induced angiogenesis significantly increased the expression of angiogenic factor proteins, such as hypoxia inducible factor 1α (HIF-1α), vascular endothelial growth factor (VEGF), and matrix metalloprotease 9 (MMP-9), at 3 d and 14 d following I/R and also increased the expression of angiogenic inhibitors, such as angiopoietin 1 (Ang-1) and its receptor tyrosine kinase (Tie-2), at 14 d following reperfusion. DHC-mediated angiogenesis was confirmed by a significant increase in positive BrdU labeling that co-localized with the von Willebrand factor (an endothelial cell marker) at 14 d after I/R. Furthermore, rotarod and pole tests demonstrated that DHC promoted functional recovery when compared with the vehicle group. Thus, the results reveal that DHC mediates angiogenesis and functional recovery after an ischemic stroke.
Source: Journal of Pharmacological Sciences - Category: Drugs & Pharmacology Source Type: research

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In conclusion, our data identify a potential role for VWF in the recruitment of proinflammatory monocytes, neutrophils and T-cells to the ischemic brain via a mechanism that is mediated by its A1 domain. PMID: 32107335 [PubMed - as supplied by publisher]
Source: Haematologica - Category: Hematology Authors: Tags: Haematologica Source Type: research
CONCLUSION: Clots in diabetic patients had more fibrin and fewer erythrocyte components compared with patients without diabetes mellitus, while hyperglycemia on admission did not show association with clot composition. Further studies are needed to confirm these results. PMID: 31924102 [PubMed - as supplied by publisher]
Source: Interventional Neuroradiology - Category: Radiology Tags: Interv Neuroradiol Source Type: research
von Willebrand factor (VWF) and platelets are key mediators of normal hemostasis. At sites of vascular injury, VWF recruits platelets via binding to the platelet receptor glycoprotein Ibα (GPIbα). Over the past decades, it has become clear that many hemostatic factors, including VWF and platelets, are also involved in inflammatory processes, forming intriguing links between hemostasis, thrombosis, and inflammation. The so-called “thrombo-inflammatory” nature of the VWF-platelet axis becomes increasingly recognized in different cardiovascular pathologies, making it a potential therapeutic target to i...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Authors: Leebeek FWG, Muslem R Abstract Chronic heart failure (HF) is a growing health problem, and it is associated with high morbidity and mortality. Left ventricular assist devices (LVADs) are nowadays an important treatment option for patients with end-stage HF not only as a bridging tool to heart transplantation but also, as a permanent therapy for end-stage HF (destination therapy). The use of LVAD is associated with a high risk for bleeding complications and thromboembolic events, including pump thrombosis and ischemic stroke. Bleeding is the most frequent complication, occurring in 30% to 60% of patients, b...
Source: Hematology ASH Education Program - Category: Hematology Tags: Hematology Am Soc Hematol Educ Program Source Type: research
Ischemic stroke is among the leading causes of disability and death worldwide. In acute ischemic stroke, the rapid recanalization of occluded cranial vessels is the primary therapeutic aim. However, experimental data (obtained using mostly the transient middle cerebral artery occlusion model) indicates that progressive stroke can still develop despite successful recanalization, a process termed “reperfusion injury.” Mounting experimental evidence suggests that platelets and T cells contribute to cerebral ischemia/reperfusion injury, and ischemic stroke is increasingly considered a thrombo-inflammatory disease. ...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
ConclusionsIn addition to LVAD-related thrombogenicity, the subsequent need for anticoagulation, and an acquired von Willebrand syndrome, several clinical factors, such as deviation from the anticoagulation regimen, hypertension, COPD, device infections, and aortic cross clamping, appear to have an influence on the extremely high rate of postoperative ischemic and hemorrhagic strokes.
Source: General Thoracic and Cardiovascular Surgery - Category: Cardiovascular & Thoracic Surgery Source Type: research
Publication date: Available online 8 August 2019Source: Canadian Journal of CardiologyAuthor(s): Leszek Drabik, Małgorzata Konieczyńska, Anetta UndasAbstractBackgroundFormation of dense fibrin clots has been reported in both atrial fibrillation (AF) and ischemic stroke. We have previously demonstrated that such clot properties can predict thromboembolism and major bleeding in AF patients treated with vitamin K antagonists (VKA). In this longitudinal cohort study, we evaluated whether impaired fibrinolysis is associated with clinical outcomes in AF.MethodsIn 236 patients with AF receiving with vitamin K antagonists (VKA),...
Source: Canadian Journal of Cardiology - Category: Cardiology Source Type: research
Thrombosis is the main pathogenesis of acute ischemic stroke (AIS). The main treatments for stroke either have limited efficacy or increase the risk of bleeding. ADAMTS13 (a disintegrin and metalloproteinase with a thrombospondin type 1 motif, member 13) is a metal protease that can effectively break down VWF (Von Willebrand Factor, VWF), the key factor in thrombus formation. Previous studies have proven that the abnormality of its activity is associated with many diseases. In recent years, it has been found that ADAMTS13 is closely related to stroke. We focus on the relationship between ADAMTS13 and acute ischemic stroke,...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
er SF Abstract Ischemic stroke is caused by a thromboembolic occlusion of cerebral arteries. Treatment is focused on fast and efficient removal of the occluding thrombus, either via intravenous thrombolysis or via endovascular thrombectomy. Recanalization, however, is not always successful and factors contributing to failure are not completely understood. Although the occluding thrombus is the primary target of acute treatment, little is known about its internal organization and composition. The aim of this study, therefore, was to better understand the internal organization of ischemic stroke thrombi on a molecul...
Source: Haematologica - Category: Hematology Authors: Tags: Haematologica Source Type: research
Publication date: May 2019Source: Canadian Journal of Cardiology, Volume 35, Issue 5Author(s): Błażej Głowicki, Paweł T. Matusik, Krzysztof Plens, Anetta UndasAbstractBackgroundIt is unclear whether a prothrombotic state occurs in atrial fibrillation (AF) with low stroke risk.MethodsWe studied 118 patients with AF with the Congestive Heart Failure, Hypertension, Age (≥ 75 years), Diabetes, Stroke/Transient Ischemic Attack/Systemic Embolism, Vascular Disease, Age (65-74 years), Sex (Female) (CHA2DS2-VASc) score of 1 in men or 2 in women vs 52 patients with AF with the CHA2DS2-VASc score of 0 in men or 1 in women. Pla...
Source: Canadian Journal of Cardiology - Category: Cardiology Source Type: research
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