Family of bioactive heparins-coated iron oxide nanoparticles with positive contrast in magnetic resonance imaging for specific biomedical applications.

Family of bioactive heparins-coated iron oxide nanoparticles with positive contrast in magnetic resonance imaging for specific biomedical applications. Biomacromolecules. 2017 Aug 29;: Authors: Groult H, Poupard N, Herranz F, Conforto E, Bridiau N, Sannier F, Bordenave S, Piot JM, Ruiz-Cabello J, Fruitier-Arnaudin I, Maugard T Abstract Unfractionated heparin (UFH) and low-molecular-weight heparins (LMWH) are well-known for their anticoagulant properties. There is also currently a growing interest in using LMWH in targeted cancer therapy. In particular, several types inhibit heparanase, a key enzyme overexpressed in the tumor microenvironment that promotes angiogenesis progression and metastasis spreading. Here, we propose iron oxide nanoparticles (HEP-IONP) coated with different heparins of distinct anticoagulant/anti-heparanase activity ratios and suitable for positive contrast in magnetic resonance imaging. As proof of concept, magnetic resonance angiography (MRA) were succeeded in mice up to 3 hours after intravenous administration. This new IONP-based positive contrast appropriate for clinic together with the long vascular circulating times can enabled innovative theranostic applications if combined with the various bioactivities of the heparins. Indeed, we showed using advanced in vitro tests, how HEP-IONP anticoagulant or anti-heparanase activities were maintained depending on the heparin species used for the coating. Overall, the study allowed pre...
Source: Biomacromolecules - Category: Biochemistry Authors: Tags: Biomacromolecules Source Type: research

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The zymogen form of circulating Factor VII activating protease (FSAP) is activated by histones that are released as a consequence of tissue damage or excessive inflammation. This is likely to have consequences in a number of disease conditions such as stroke, atherosclerosis, liver fibrosis, thrombosis and cancer. To investigate the existence, as well as the concentration, of active FSAP (FSAPa) in complex biological systems an active site probe is needed. We used Hybrid Combinatorial Substrate Library (HyCoSuL) to screen for natural and unnatural amino acids that specifically bind to P4-P2 pockets of FSAPa.
Source: Thrombosis Research - Category: Hematology Authors: Tags: Full Length Article Source Type: research
Cancer patients are prone to higher risk of venous thromboembolism (VTE) compared to the general population. However, the estimated incidence of cancer-associated VTE varied among the studies. The primary objective of this study was to determine the national annual incidence and examine the trend of cancer-associated VTE in the US over the years from 2005 to 2014.
Source: Thrombosis Research - Category: Hematology Authors: Tags: Full Length Article Source Type: research
Publication date: Available online 25 July 2019Source: Journal of Clinical and Experimental HepatologyAuthor(s): Raseen Tariq, Page Axley, Ashwani K. SingalNonalcoholic fatty liver disease (NAFLD) is now the leading cause of chronic liver disease worldwide with a strong association with metabolic syndrome. NAFLD is truly a systemic disease and is associated with a plethora of extra-hepatic manifestations or comorbidities. These are either related to secondary effects of associated obesity or from pathophysiological effects of insulin resistance in NAFLD. Three most common causes of increased morbidity and mortality associa...
Source: Journal of Clinical and Experimental Hepatology - Category: Gastroenterology Source Type: research
AbstractBackgroundVenous thromboembolism (VTE) is the most common preventable cause of 30-day post-operative mortality, with many events occurring after hospital discharge. High-level evidence supports post-discharge VTE chemoprophylaxis following abdominal/pelvic cancer resection; however, some studies support a more tailored approach. Our objectives were to (1) identify risk factors associated with post-discharge VTE in a large cohort of patients undergoing colorectal cancer resection and (2) develop a post-discharge VTE risk calculator.MethodsPatients who underwent colorectal cancer resection from 2012 to 2016 were iden...
Source: Journal of Gastrointestinal Surgery - Category: Surgery Source Type: research
Conclusion Provoked venous thromboembolism is an entity that can be prevented. Malignancy and surgical treatment are the most common risk factors and these patients should be treated with special care. The creation of a register of patients with venous thromboembolism in Bosnia and Herzegovina would enable the development of a preventive strategy in the groups of patients at risk. PMID: 31402639 [PubMed - as supplied by publisher]
Source: Primary Care - Category: Primary Care Authors: Tags: Med Glas (Zenica) Source Type: research
ConclusionsMOCA is safe and effective in treating chronic venous ulcers and appears to provide comparable results to methods that rely on thermal ablation. Younger age and use of MOCA favored wound healing. MOCA was an independent predictor of ulcer healing. Randomized studies are necessary to further support our findings.
Source: Journal of Vascular Surgery: Venous and Lymphatic Disorders - Category: Surgery Source Type: research
AbstractThere are no guideline recommendations for the use of anticoagulant therapy in atrial fibrillation (AF) patients with cancer, which creates uncertainty about the optimal antithrombotic treatment in these patients. We conducted a network meta-analysis for the first time to assess the efficacy and safety of anticoagulant drugs in patients with AF and concurrent cancer. The PubMed, EMBASE, and Cochrane databases were searched up to March 2019. A search was made for the main anticoagulant drugs (warfarin, dabigatran, apixaban, rivaroxaban, and edoxaban). Outputs were presented as odds ratios (ORs), their corresponding ...
Source: Heart Failure Reviews - Category: Cardiology Source Type: research
ConclusionsThere is a strong rationale for mammography to become a dual test for breast cancer screening and CV disease prevention. However, robust and automated quantification methods are needed for a deeper insight on the association between BAC and CV disease, to stratifying CV risk and define personalized preventive actions.Graphical abstract
Source: European Journal of Radiology - Category: Radiology Source Type: research
Semin Thromb Hemost DOI: 10.1055/s-0039-1692977Clinicians and scientists in the fields of hemostasis and thrombosis have been among those first to integrate new molecular strategies for the purpose of enhancing disease diagnosis and treatment. The molecular diagnosis and introduction of gene therapy approaches for hemophilia are obvious examples of this tendency. In this review, the authors summarize information concerning three molecular technologies that have reached various stages of translational potential for their incorporation into the clinical management of disorders of hemostasis. Chromatin conformation assays are...
Source: Seminars in Thrombosis and Hemostasis - Category: Hematology Authors: Tags: Review Article Source Type: research
Semin Thromb Hemost DOI: 10.1055/s-0039-1688491Nanoparticles have numerous biomedical applications including, but not limited to, targeted drug delivery, diagnostic imaging, sensors, and implants for a wide range of diseases including cancer, diabetes, heart disease, and tuberculosis. Although the mode of delivery of the nanoparticles depends on the application and the disease, the nanoparticles are often in immediate contact with the systemic circulation either because of intravenous administration or their ability to enter the bloodstream with relative ease or their longer survival time in circulation. Once in circulatio...
Source: Seminars in Thrombosis and Hemostasis - Category: Hematology Authors: Tags: Review Article Source Type: research
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