Search results for "STRESS"

Oxidative stress induces myeloperoxidase expression in endocardial endothelial cells from patients with chronic heart failure.

2009

Increased oxidative stress has been implicated in the pathogenesis of a number of cardiovascular diseases. Recent findings suggest that myeloperoxidase (MPO) may play a key role in the initiation and maintenance of chronic heart failure (CHF) by contributing to the depletion of the intracellular reservoir of nitric oxide (NO). NO consumption through MPO activity may lead to protein chlorination or nitration, leading to tissue damage. Primary cultures of human endocardial endothelial cells (EEC) obtained at heart transplantation of patients with CHF and human umbilical vein endothelial cells (HUVEC) were subjected to oxidative stress by incubation with hydrogen peroxide at non lethal (60 mic…

Oxidative stress in ciliated nasal epithelial cells from patients with primary ciliary dyskinesia

2016

Background: Primary ciliary dyskinesia (PCD) is a rare disorder characterized by dysfunction of respiratory cilia and impaired mucociliary clearance leading to recurrent airway infection and chronic inflammation appearing in childhood. Rationale and aims: Chronic inflammation has been associated to oxidative stress (OS). Moreover, evidence of increased OS in the airways of stable children with PCD has been shown (Zihlif, N. et al . Pediatr Pulmonol 2006; 41:509-14). We hypothesize that OS would be increased in ciliated nasal epithelial cells (CNEC) from patients with PCD. This study was aimed to assess the OS profile in CNEC isolated from children with PCD. Methods: CNEC were obtained from …

Exercise induces oxidative stress in healthy subjects and in chronic obstructive pulmonary disease patients

2000

The role of stress in the onset of depressive disorders

2002

Background: We conducted the present study to evaluate the impact of stressful events on the onset of depressive disorders in a Spanish clinical sample, compared to a control group matched for age, sex, civil status and social class. We compared our results with those of other studies carried out with samples that were both clinically and culturally similar to ours. Method: Fifty depressed patients that were diagnosed with a depressive episode in the 6 months prior to the interview and 50 healthy controls were included in the study. Both groups were compared on the “Life Events and Difficulties Schedule” (LEDS). Results: Of the depressive patients, 68 % compared to only 18 % of the control …

Children and Employment - Resource or Stressors after Breast Cancer?

2013

Introduction: Breast cancer patients suffer clinically relevant levels of psychological stress because of their disease. Various factors can affect the level of stress experienced. This study aimed to investigate the relationship between the level of psychological stress and employment and children, including time since diagnosis. Material and Methods: A randomised clinical study was done of 724 breast cancer patients aged between 18 and 65 years; all were in the curative stage of disease and had been diagnosed 0–12 months previously. Patients were investigated for their levels of psychological stress (anxiety and depression) using the Hospital Anxiety and Depression Scale (HADS). The relat…

Percutaneous tracheostomy in COVID patients. Experience in our hospital center after one year of pandemic and review of the literature

2021

Background The pandemic caused by SARS-COV-2 has caused an increase in the need of tracheostomies in patients affected with respiratory distress syndrome. In this article we report our experience during a year of pandemic, we develop our surgical technique to perform percutaneous tracheostomy with the patient in apnea and we compare our results with those of other centers through a bibliographic review. Material and Methods A one-year retrospective clinical study was carried out on tracheotomies performed on patients admitted to the intensive care unit with severe SARS-CoV-2, with difficulty for ventilation or weaning. The technique performed was percutaneous, with fibroscopic control throu…

The HIF1α-PFKFB3 Pathway: A Key Player in Diabetic Retinopathy

2021

Abstract Diabetic retinopathy (DR) is the leading cause of blindness for adults in developed countries. Both microvasculopathy and neurodegeneration are implicated in mechanisms of DR development, with neuronal impairment preceding microvascular abnormalities, which is often underappreciated in the clinic. Most current therapeutic strategies, including anti-vascular endothelial growth factor (anti-VEGF)-antibodies, aim at treating the advanced stages (diabetic macular edema and proliferative diabetic retinopathy) and fail to target the neuronal deterioration. Hence, new therapeutic approach(es) intended to address both vascular and neuronal impairment are urgently needed. The hypoxia-induci…

Impact of Aortic Stenosis on Myofiber Stress: Translational Application of Left Ventricle-Aortic Coupling Simulation

2020

The severity of aortic stenosis (AS) has traditionally been graded by measuring hemodynamic parameters of transvalvular pressure gradient, ejection jet velocity, or estimating valve orifice area. Recent research has highlighted limitations of these criteria at effectively grading AS in presence of left ventricle (LV) dysfunction. We hypothesized that simulations coupling the aorta and LV could provide meaningful insight into myocardial biomechanical derangements that accompany AS. A realistic finite element model of the human heart with a coupled lumped-parameter circulatory system was used to simulate AS. Finite element analysis was performed with Abaqus FEA. An anisotropic hyperelastic mo…

Physical Activity in Polluted Air—Net Benefit or Harm to Cardiovascular Health? A Comprehensive Review

2021

Both exposure to higher levels of polluted air and physical inactivity are crucial risk factors for the development and progression of major noncommunicable diseases and, in particular, of cardiovascular disease. In this context, the World Health Organization estimated 4.2 and 3.2 million global deaths per year in response to ambient air pollution and insufficient physical activity, respectively. While regular physical activity is well known to improve general health, it may also increase the uptake and deposit of air pollutants in the lungs/airways and circulation, due to increased breathing frequency and minute ventilation, thus increasing the risk of cardiovascular disease. Thus, determi…

Sestrins: Novel antioxidant and AMPK-modulating functions regulated by exercise?

2013

Oxidative stress results from damage to tissues caused by free radicals and is increased by exercise. Peroxiredoxins (PRXs) maintain the cellular reducing environment by scavenging intracellular hydrogen peroxide. It has been recently noted that physical exercise has a positive effect on the PRX system, exerting a protective effect against oxidative stress-induced damage. However, other compounds, such as sestrins (SESNs), a stress-inducible protein family with antioxidant properties, should also be considered in the function of PRXs. SESNs are clearly involved in the regeneration process of PRXs and therefore may also be modulated by physical exercise. In addition, SESNs are clearly involv…