Search results for: ASSAY
#34130366 2021/05/31 To Up
A Network Meta-Analysis Comparing Osteoporotic Fracture among Different Direct Oral Anticoagulants and Vitamin K Antagonists in Patients with Atrial Fibrillation.There are limited studies comparing the risk of osteoporosis and fractures between different direct oral anticoagulants (DOACs) and vitamin K antagonists (VKA) in non-valvular atrial fibrillation (AF). Using a network meta-analysis (NMA), we compared osteoporotic fractures among 5 different treatment arms, viz. dabigatran, rivaroxaban, apixaban, edoxaban, and VKA.
Dibbendhu Khanra, Anindya Mukherjee, Saurabh Deshpande, Hassan Khan, Sanjeev Kathuria, Danesh Kella, Deepak Padmanabhan
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#34130355 2021/06/15 To Up
The repeatability of measurements of male pelvic floor anatomy and function made from transperineal ultrasound images of healthy men and those before and after prostatectomy.To investigate the inter- and intratester repeatability of measurement of the location and displacement of five pelvic landmarks related to pelvic floor muscles with transperineal ultrasound (TPUS) imaging recorded from healthy men and men before and after prostatectomy.
David Cowley, Ryan E Stafford, Paul W Hodges
1014 related Products with: The repeatability of measurements of male pelvic floor anatomy and function made from transperineal ultrasound images of healthy men and those before and after prostatectomy.2.5 mg1,000 tests100ul1 mg50 ug 100ug100 mg1000 tests10 mg100ug1000 TESTS/0.65ml
#34130353 2021/06/15 To Up
Differentiation of Brain Tumor Microvasculature From Normal Vessels Using Optical Coherence Angiography.Despite rapid advances and discoveries in medical imaging, monitoring therapeutic efficacy for malignant gliomas and monitoring tumor vasculature remains problematic. The purpose of this studyÂ is to utilize optical coherence angiography for vasculature characterization inside and surrounding brain tumors in a murine xenograft brain tumor model. Features included in our analysis include fractional blood volume, vessel tortuosity, diameter, orientation, and directionality.
Farah Andleeb, Nitesh Katta, Aleksandra Gruslova, Bharadwaj Muralidharan, Arnold Estrada, Austin B McElroy, Hafeez Ullah, Andrew J Brenner, Thomas E Milner
1185 related Products with: Differentiation of Brain Tumor Microvasculature From Normal Vessels Using Optical Coherence Angiography.
#34130352 2021/06/15 To Up
Inverse probability weighting is an effective method to address selection bias during the analysis of high dimensional data.Omics studies frequently use samples collected during cohort studies. Conditioning on sample availability can cause selection bias if sample availability is nonrandom. Inverse probability weighting (IPW) is purported to reduce this bias. We evaluated IPW in an epigenome-wide analysis testing the association between DNA methylation (261,435 probes) and age in healthy adolescent subjects (nâ=â114). We simulated age and sex to be correlated with sample selection and then evaluated four conditions: complete population/no selection bias (all subjects), naÃ¯ve selection bias (no adjustment), and IPW selection bias (selection bias with IPW adjustment). Assuming the complete population condition represented the "truth," we compared each condition to the complete population condition. Bias or difference in associations between age and methylation was reduced in the IPW condition versus the naÃ¯ve condition. However, genomic inflation and type 1 error were higher in the IPW condition relative to the naÃ¯ve condition. Postadjustment using bacon, type 1 error and inflation were similar across all conditions. Power was higher under the IPW condition compared with the naÃ¯ve condition before and after inflation adjustment. IPW methods can reduce bias in genome-wide analyses. Genomic inflation is a potential concern that can be minimized using methods that adjust for inflation.
Patrick M Carry, Lauren A Vanderlinden, Fran Dong, Teresa Buckner, Elizabeth Litkowski, Timothy Vigers, Jill M Norris, Katerina Kechris
2253 related Products with: Inverse probability weighting is an effective method to address selection bias during the analysis of high dimensional data.1 module100ug Lyophilized100 ug1 module1 module1 module1 module1 g100ug Lyophilized1 module1 module
#34130351 2021/06/15 To Up
Effects of Ultrashort Wave Therapy on Inflammation and Macrophage Polarization after Acute Lung Injury in Rats.Acute lung injury (ALI) features dysregulated pulmonary inflammation. Ultrashort waves (USWs) exert anti-inflammatory effectsÂ but no studies have evaluated their activity in ALI. Herein, we used an in vivo lipopolysaccharide (LPS)-induced ALI model to investigate whether the anti-inflammatory activity of USWs is mediated by altering the polarization of M1 to M2 macrophages. Twenty-four male Sprague-Dawley rats were randomly divided into control, untreated ALI, and ALI treated with USW groups (nâ=â8 in each group). ALI was induced by intratracheal LPS instillation. Rats in the USW group were treated for 15âmin at 0, 4, and 8âh after a single LPS intratracheal instillation. Histopathologic examination, wet/dry lung weight ratio, enzyme-linked immunosorbent assay, quantitative real-time polymerase chain reaction, and western blot analyses were performed to evaluate the degree of lung injury and to determine macrophage phenotypes. Histopathologic examination disclosed attenuation of ALI, with reduced alveolar hemorrhage and neutrophilic infiltration in the USW group. Serum levels of tumor necrosis factor-Î± (TNF-Î±) and interleukin-1Î² (IL-1Î²) were significantly decreased after USW therapy. Moreover, the messenger RNA (mRNA) expressions of TNF-Î± and IL-1Î² were significantly decreased in the USW group, whereas the mRNA expression of Arginase 1 (Arg1) and the protein expression of mannose receptor significantly increased in comparison with the untreated ALI group. We conclude that USW therapy may attenuate inflammation in LPS-induced ALI through the modulation of macrophage polarization. Â© 2021 Bioelectromagnetics Society.
Lan Li, Mengjian Qu, Lu Yang, Jing Liu, Qian Wang, Peirui Zhong, Yahua Zeng, Ting Wang, Hao Xiao, Danni Liu, Xiarong Huang, Jinling Wang, Jun Zhou
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#34130345 2021/06/15 To Up
Rotational Thromboelastometry in Neonates Admitted to a Neonatal Intensive Care Unit: A Large Cross-sectional Study.The aim of the present study was to assess the coagulation profile in neonatal critical illness using rotational thromboelastometry (ROTEM), and to investigate its association with disease severity and its potential prognostic role in this clinical setting. Over a period of 67 months (July 2014-February 2020) 423 critically ill neonates with confirmed or suspected sepsis, perinatal hypoxia, or respiratory distress syndrome, hospitalized in our neonatal intensive care unit were included in the study. Demographic, clinical, and laboratory data were recorded on admission day and arterial blood was analyzed on ROTEM analyzer using the standard extrinsically activated rotational thromboelastometry assay (EXTEM). Neonatal illness severity scores (Modified NEOMOD [Neonatal Multiple Organ Dysfunction] and SNAPPE [Score for Neonatal Acute Physiology with Perinatal Extension]) were calculated at the same time as ROTEM analysis. Mortality during in-hospital stay was the main outcome measure. Multivariable analyses showed that a 10âmm decrease in EXTEM clot amplitude recorded at 10âminutes (A10) is significantly associated with a higher mortality (odds ratio [OR]â=â1.69, 95% confidence interval [CI]: 1.33-2.08). Higher modified NEOMOD (ORâ=â1.36, 95% CI: 1.26-1.47) and higher SNAPPE scores (ORâ=â1.06, 95% CI: 1.04-1.08) were also associated with increased mortality. The CT and A10 variables demonstrated the best prognostic performance among the EXTEM parameters for mortality (area under the curve [AUC]â=â0.78; 95% CI: 0.69-0.86 and AUCâ=â0.76; 95% CI: 0.66-0.85, respectively), showing an optimal cut-off CT â¥63âseconds and A10 â¤37âmm. Using optimal cut-off values of the EXTEM parameters for prediction of mortality, neonates with CT â¥63âseconds were 7.4 times more likely to die (ORâ=â7.40, 95% CI: 3.50-15.65), while neonates with A10 â¤37âmm were 5.8 times more likely to die (ORâ=â5.88, 95% CI: 2.94-12.50). An EXTEM hypocoagulable profile on disease onset was shown to be an independent risk factor for in-hospital mortality in neonatal critical illness.
Rozeta Sokou, Andreas G Tsantes, Aikaterini Konstantinidi, Georgios Ioakeimidis, Maria Lampridou, Stavroula Parastatidou, Martha Theodoraki, Daniele Piovani, Zoe Iliodromiti, Theodora Boutsikou, Nicoletta Iacovidou, Panagiota Douramani, Aristarchos Poulis, Styliani Kokoris, Anastasios G Kriebardis, Stefanos Bonovas, Argirios E Tsantes
1845 related Products with: Rotational Thromboelastometry in Neonates Admitted to a Neonatal Intensive Care Unit: A Large Cross-sectional Study.100 μg1 kit100 25 Bags/Unit100 1 mg
#34130343 2021/06/15 To Up
ROTEM Testing for Direct Oral Anticoagulants.Direct oral anticoagulants (DOACs) are increasingly used worldwide for the prevention of stroke in patients with atrial fibrillation and to prevent or treat venous thromboembolism. In situations such as serious bleeding, the need for urgent surgery/intervention or the management of a thromboembolic event, the laboratory measurement of DOACs levels or anticoagulant activity may be required. Rotational thromboelastometry (ROTEM) is a viscoelastic hemostatic assay (VHA) which has been used in emergencies (trauma and obstetrics), and surgical procedures (cardiac surgery and liver transplants), but experience with this assay in DOACs-treated patients is still limited. This article reviews the use of ROTEM in the setting of DOACs therapy, focusing on DOACs-associated bleeding and the use of this VHA for the management of reversal strategies for DOACs-associated anticoagulation.
Barbora KorpallovÃ¡, Matej SamoÅ¡, TomÃ¡Å¡ Bolek, Linda KÃ¼hnelovÃ¡, Ingrid Å korÅovÃ¡, Peter Kubisz, JÃ¡n StaÅ¡ko, MariÃ¡n MokÃ¡Å5x96 well plate96/kit100 mg10 mg100ug5 g100ug Lyophilized500 mouse tails (100 ml)
#34130341 2021/06/15 To Up
Is Lupus Anticoagulant a Significant Feature of COVID-19? A Critical Appraisal of the Literature.The term "lupus anticoagulant (LA)" identifies a form of antiphospholipid antibodies (aPLs) causing prolongation of clotting tests in a phospholipid concentration-dependent manner. LA is one of the laboratory criteria identified in patients with antiphospholipid (antibody) syndrome (APS). The presence of LA in patients with APS represents a significant risk factor for both thrombosis and pregnancy morbidity. There have been several reports of similarities between some of the pathophysiological features of COVID-19 and APS, in particular the most severe form, catastrophic APS. There have also been many reports identifying various aPLs, including LA, in COVID-19 patients. Accordingly, a very pertinent question arises: "Is LA a feature of COVID-19 pathology?" In this review, we critically appraise the literature to help answer this question. We conclude that LA positivity is a feature of COVID-19, at least in some patients, and potentially those who are the sickest or have the most severe infection. However, many publications have failed to appropriately consider the many confounders to LA identification, being assessed using clot-based assays such as the dilute Russell viper venom time, the activated partial thromboplastin time (aPTT), and the silica clotting time. First, most patients hospitalized with COVID-19 are placed on anticoagulant therapy, and those with prior histories of thrombosis would possibly present to hospital already on anticoagulant therapy. All anticoagulants, including vitamin K antagonists, heparin (both unfractionated heparin and low-molecular-weight heparin), and direct oral anticoagulants affect these clot-based assays. Second, C-reactive protein (CRP) is highly elevated in COVID-19 patients, and also associated with severity. CRP can also lead to false-positive LA, particularly with the aPTT assay. Third, persistence of aPL positivity (including LA) is required to identify APS. Fourth, those at greatest risk of thrombosis due to aPL are those with highest titers or multiple positivity. Most publications either did not identify anticoagulation and/or CRP in their COVID-19 cohorts or did not seem to account for these as possible confounders for LA detection. Most publications did not assess for aPL persistence, and where persistence was checked, LA appeared to represent transient aPL. Finally, high titer aPL or multiple aPL positivity were in the minority of COVID-19 presentations. Thus, at least some of the reported LAs associated with COVID-19 are likely to be false positives, and the relationship between the detected aPL/LA and COVID-19-associated coagulopathy remains to be resolved using larger and better studies.
Emmanuel J Favaloro, Brandon Michael Henry, Giuseppe Lippi
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#34130338 2021/06/15 To Up
Adjuvant versus Neoadjuvant Immunotherapy for Hepatocellular Carcinoma: Clinical and Immunologic Perspectives.Advancement in systemic therapy, particularly immune checkpoint inhibitor (ICI)-based combination regimens, has transformed the treatment landscape for patients with advanced hepatocellular carcinoma (HCC). The advancement in systemic therapy also provides new opportunities of reducing recurrence after curative therapy through adjuvant therapy or improving resectability through neoadjuvant therapy. Improved recurrence-free survival by adjuvant or neoadjuvant ICI-based therapy has been reported in other cancer types. In this article, developments of systemic therapy in adjuvant and neoadjuvant settings for HCC were reviewed. The design of adjuvant and neoadjuvant therapy using ICI-based regimens and potential challenges of trial conduct and result analysis was discussed. Results from these trials may extend the therapeutic benefit of ICI-based systemic therapy beyond the advanced-stage disease and lead to a new era of multidisciplinary management for HCC.
Yung-Yeh Su, Chia-Chen Li, Yih-Jyh Lin, Chiun Hsu
1896 related Products with: Adjuvant versus Neoadjuvant Immunotherapy for Hepatocellular Carcinoma: Clinical and Immunologic Perspectives.
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