Increased dipeptidyl peptidase-4 accelerates chronic stress-related thrombosis in a mouse carotid artery model

Conclusion: DPP-4 inhibition appeared to improve the FeCl3-induced thrombosis in mice that received stress, possibly via the improvement of ADAMTS13 and oxidative stress, suggesting that DPP-4 could become a novel therapeutic target for chronic psychological stress-related thrombotic events in metabolic cardiovascular disorders.
Source: Journal of Hypertension - Category: Cardiology Tags: ORIGINAL PAPERS: Organ damage - experimental models Source Type: research

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Semin Thromb Hemost DOI: 10.1055/s-0040-1714202There is increasing evidence that portal hypertension plays a major role in bleeding risk during orthotopic liver transplantation (OLT). We investigated the association between preoperative blood levels of von Willebrand factor (VWF) and soluble CD163 (sCD163), which are established markers of portal hypertension, and blood loss and transfusion requirements during OLT. We measured levels of VWF and sCD163 in preoperative serum samples of 168 adult patients undergoing a primary OLT between 1998 and 2012. Preoperative levels of VWF and sCD163 correlated with the model of end-sta...
Source: Seminars in Thrombosis and Hemostasis - Category: Hematology Authors: Tags: Review Article Source Type: research
Semin Thromb Hemost DOI: 10.1055/s-0039-3400258Primary hemostasis, similar to other systems in the adjusting and transitioning neonate, undergoes developmental adaptations in the first days of life. Although platelets of neonates do not differ quantitatively compared with those of adults, they functionally present with major differences, thus supporting the theory of a “hypofunctional” phenotype that is counterbalanced by high hematocrit and more potent von Willebrand factor multimers. No clinical effect of bleeding tendency has hence been established so far for healthy term neonates. However, discrepancies in ...
Source: Seminars in Thrombosis and Hemostasis - Category: Hematology Authors: Tags: Review Article Source Type: research
Authors: Jain M, Vargese J, Sachan D, Venkataraman J Abstract Von Willebrand factor (vWF) is an adhesive and multimeric glycoprotein that has a central role in primary hemostasis. v W F levels correlate with thrombosis risk and inversely with bleeding risk within the apparently healthy population. Recently, numerous publications in Indian and western literature have focussed to its role in liver diseases like acute liver failure, chronic liver disease, non cirrhotic portal hypertension and tropical infections eg. dengue. The present review encapsulates the recent advances in this aspect. PMID: 31324089 [PubMed - in process]
Source: Journal of the Association of Physicians of India - Category: General Medicine Tags: J Assoc Physicians India Source Type: research
CONCLUSIONS: Our data indicate that PAD4 in circulation reduces VWF-platelet string clearance and accelerates formation of a stable platelet plug after vessel injury. We propose that this effect is, at least in part, due to ADAMTS13 inhibition. PMID: 31248335 [PubMed - as supplied by publisher]
Source: Circulation Research - Category: Cardiology Authors: Tags: Circ Res Source Type: research
Conclusion: The results suggest that an immunosuppressive state develops at the terminal stage of severe leptospirosis with pulmonary hemorrhage and shock similar to that of patients with septic shock, with diffuse endothelial activation in the spleen, splenitis, and signs of disturbance in the innate and adaptive immunity in the spleen. The presence of leptospiral antigens in 73% of the spleens of the leptospirosis patients suggests the etiological agent contributes directly to the pathogenesis of the lesions. Our results support therapeutic approaches involving antibiotic and immunomodulatory treatments for leptospirosis...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Introduction: Obstructive sleep apnea syndrome (OSA) is a common disorder characterized by repetitive episodes of nocturnal breathing cessation due to upper airway collapse that cause intermittent hypoxia. Because of this, there is an increase in oxidative stress, endothelial damage and mortality associated with the incidence of thrombotic events. The evaluation of platelet function by flow cytometry (FCM) and hemostatic capacity through global hemostasis tests have been successfully used in the study of the prothrombotic state associated to numerous diseases. We anticipate that these techniques may help to clarify the mec...
Source: Blood - Category: Hematology Authors: Tags: 331. Pathophysiology of Thrombosis Source Type: research
Background:In myeloproliferative neoplasms, especially essential thrombocythemia (ET), platelet (Plt) counts and von Willebrand factor (vWF):Ristocetin cofactor (RCo) levels have been reported to be inversely correlated. However, there have been no reports of the comparison of high vs. low values of JAK2 allele burden and necessary of Plt counts reduction to achieve vWF:RCo levels ≥50%, which is required for major surgery. We investigated the correlation between vWF level and Plt counts for JAK2V617F mutation positive (JAK2V617F+) polycythemia vera (PV) and ET (allele burdens ≥50% and
Source: Blood - Category: Hematology Authors: Tags: 634. Myeloproliferative Syndromes: Clinical: Poster III Source Type: research
Semin Thromb Hemost DOI: 10.1055/s-0038-1639501Anxiety, a normal response to stressful situations, is characterized by increased levels of factor VIII, fibrinogen, and von Willebrand factor, and by enhanced platelet aggregability. One would expect acute anxiety to be a prothrombotic state, but since acute mental stress induces tissue plasminogen activator (tPA) release from endothelial and chromaffin cells, fibrinolysis counteracts procoagulant stimuli. It could be said that procoagulant changes accompanying the fight-or-flight response reduce the risk of bleeding in case of potential injuries, while activation of fibrinol...
Source: Seminars in Thrombosis and Hemostasis - Category: Hematology Authors: Tags: Review Article Source Type: research
CONCLUSION: The increased or decreased activity of these two genes as a result of genetic changes and the development of thrombosis are a challenging and contradictory matter, and the study of genetic variability in ADAMTS13 and vWF genes may be helpful in the diagnosis of thrombotic disorders. PMID: 29669506 [PubMed - as supplied by publisher]
Source: Cardiovascular and Hematological Disorders Drug Targets - Category: Drugs & Pharmacology Tags: Cardiovasc Hematol Disord Drug Targets Source Type: research
Abstract Commensal gut microbiota have recently been implicated in cardiovascular disease (CVD) and cerebrovascular disease. Atherosclerotic plaque formation depends on the colonization status of the host. In addition to host nutrition and the related microbiota‐dependent metabolic changes, activation of innate immune pathways triggers the development of atherosclerosis and supports arterial thrombosis. Gnotobiotic mouse models have uncovered that activation of Toll‐like receptor‐2 by gut microbial ligands supports von Willebrand factor‐integrin mediated platelet deposition to the site of vascular injury. Depending...
Source: European Journal of Immunology - Category: Allergy & Immunology Authors: Tags: Review Source Type: research
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