Search results for "INTERACTION"

Special Considerations for Antihypertensive Agents in Dialysis Patients

2010

Hypertension is present in most patients with end-stage renal disease and likely contributes to the premature cardiovascular disease in dialysis patients. Previous practice guidelines have recommended that, in patients on chronic dialysis, blood pressure (BP) should be reduced below 130/80 mm Hg. This is based on opinions but not strong evidence, since no concrete information exists about which BP values should be the parameter to follow and which should be the target BP values. The majority of the antihypertensive agents can be used in this population, but the pharmacokinetics altered by the impaired kidney function and dialyzability influence the appropriate dosage as well as the time and…

Intermittent ethanol exposure induces inflammatory brain damage and causes long-term behavioural alterations in adolescent rats

2007

Adolescent brain development seems to be important for the maturation of brain structures and behaviour. Intermittent binge ethanol drinking is common among adolescents, and this type of drinking can induce brain damage. Because we have demonstrated that chronic ethanol treatment induces inflammatory processes in the brain, we investigate whether intermittent ethanol intoxication enhances cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) in adolescent rats, and whether these mediators induce brain damage and cause permanent cognitive dysfunctions. Adolescent rats were exposed to ethanol (3.0 g/kg) for two consecutive days at 48-h intervals over 14 days. Levels of COX-2, iN…

Clinical management of drug-drug interactions in HCV therapy: Challenges and solutions.

2013

Contains fulltext : 118153.pdf (Publisher’s version ) (Open Access) Hepatitis C virus (HCV) infected patients often take multiple co-medications to treat adverse events related to HCV therapy, or to manage other co-morbidities. Drug-drug interactions associated with this polypharmacy are relatively new to the field of HCV pharmacotherapy. With the advent of the direct-acting antivirals telaprevir and boceprevir, which are both substrates and inhibitors of the cytochrome P450 (CYP) 3A iso-enzyme, knowledge and awareness of drug-drug interactions have become a cornerstone in the evaluation of patients starting and continuing HCV combination therapy. In our opinion, an overview of conducted dr…

Neuro-radiosurgery treatments: MRI brain tumor seeded image segmentation based on a cellular automata model

2016

Gross Tumor Volume (GTV) segmentation on medical images is an open issue in neuro-radiosurgery. Magnetic Resonance Imaging (MRI) is the most promi-nent modality in radiation therapy for soft-tissue anatomical districts. Gamma Knife stereotactic neuro-radiosurgery is a mini-invasive technique used to deal with inaccessible or insufficiently treated tumors. During the planning phase, the GTV is usually contoured by radiation oncologists using a manual segmentation procedure on MR images. This methodology is certainly time-consuming and op-erator-dependent. Delineation result repeatability, in terms of both intra- and inter-operator reliability, is only obtained by using computer-assisted appr…

Influence of different CyA formulations and calcium channel blocker phenyhidine regimens on intracellular (erythrocyte) calcium levels after kidney t…

1997

Ambulatory assessment as a means of longitudinal phenotypes characterization in psychiatric disorders

2014

Abstract Ambulatory Assessment (AA) comprises the use of in-field methods to assess individuals’ behavior, physiology, and the experience as they unfold in naturalistic settings. We propose that AA is favorable for the investigation of gene–environment interactions and for the search for endophenotypes, being able to assess the experienced environment and to track basic regulatory processes, such as stress reactivity, affective instability, and reward experience, which are potential common factors that underlie psychiatric disorders. In this article, we (a) first describe briefly the rationale of AA and summarize the key advantages of the approach, (b) highlight within-subject regulatory pr…

Resistance-associated substitutions in patients with chronic hepatitis C virus genotype 4 infection

2020

Data on the prevalence of resistance-associated substitutions (RASs) and their implications for treatment with direct-acting antivirals (DAAs) are sparse in European patients with HCV genotype 4. This study investigated RASs before and after DAA failure in different genotype 4 subtypes and evaluated retreatment efficacies. Samples of 195 genotype 4-infected patients were collected in the European Resistance Database and investigated for NS3, NS5A and NS5B RASs. Retreatment efficacies in DAA failure patients were analysed retrospectively. After NS5A inhibitor (NS5Ai) failure, subtype 4r was frequent (30%) compared to DAA-naive patients (5%) and the number of NS5A RASs was significantly highe…

Direct-acting antiviral-based therapy for chronic hepatitis C virus in HIV-infected patients

2015

The aim of this review was to detail the current therapies and treatments for chronic hepatitis C virus in coinfected patients, focusing on HCV antiviral agents currently used in practice today or scheduled to enter the open market soon. Several direct-acting antiviral (DAA) combinations show high sustained virologic response (SVR) rates in HIV/HCV-coinfected patients, which are often close to those observed in HCV-monoinfected patients. Most recommendations regarding treatment stem from trials with coinfected patients. However, data are lacking for some aspects of HCV-treatment in coinfection, so extrapolations must be made from data obtained predominately from monoinfected patients. HIV/H…

Real life data on elbasvir/grazoprevir efficacy, safety and drug-drug interaction profile in patients with chronic hepatitis C viral infection: a pro…

2019

Introduction: In a previous study, based on PITER cohort data, it was reported that of patients, undergoing direct acting antiviral (DAA) therapy, 30%-44%, are at risk of potential drug-drug interactions (DDI). Aim: We aimed to evaluate the prospective profile of elbasvir/grazoprevir (EBR/GZR) efficacy and safety combined with real life comedication profile. Method: Data from 312 patients (mean age 63 ± 10 years; 44% male, 90% of genotype 1.85% fibrosis stage ≤ F3, 15% with child A cirrhosis), enrolled in PITER by 15 clinical centers and treated with EBR/GZR, with at least three months of follow up after the end of treatment, were evaluated. Comedication profiles (no changes, drugs interrup…

Heritability of corneal refraction and corneal astigmatism: a population-based twin study among 66- to 79-year-old female twins.

2012

. Purpose:  To examine the heritability of corneal refraction power (CR) and corneal astigmatism (AST) in older women. Methods:  Corneal refraction and AST were measured by IOL master in 52 monozygotic (MZ) and 47 dizygotic (DZ) female twin pairs aged 66–79 years. The relative contribution of genetic and environmental factors to individual differences in CR was estimated by applying an independent pathway model to the twin data and AST by intraclass correlations (ICC). Results:  For the right eye, mean CR was 44.58 dioptres (D) (standard deviation (SD) ±1.28) When comparing CR of the right and left eye between MZ and DZ, no significant difference was found. Mean AST was 0.77 D (SD ±0.44) wi…