Scandinavian journal of clinical and laboratory investigation
-
Scand. J. Clin. Lab. Invest. · Jan 2009
Analysis of cardiovascular responses to passive head-up tilt using continuous pulse wave analysis and impedance cardiography.
To non-invasively measure central haemodynamics, arterial stiffness, cardiac function and vascular resistance, with the subject in the supine position and during head-up tilt, in order to examine the haemodynamic changes associated with alterations in the augmentation index, and to investigate repeatability and reproducibility of the measurement protocol. ⋯ Combined pulse wave analysis and impedance cardiography with the subject in the supine position and during head-up tilt is a repeatable and reproducible method for comprehensive investigation of the cardiovascular function.
-
Scand. J. Clin. Lab. Invest. · Jan 2009
Systemic and local cytokine kinetics in musculoskeletal injury: a prospective study in patients with ankylosing spondylitis.
Back surgery in patients with ankylosing spondylitis is a major trauma in individuals with tissue inflammation and joint destruction along the spine; we used surgery in these patients as a model in the study of systemic and local cytokine profiles in complicated trauma situations. ⋯ This study indicates that a major musculoskeletal trauma principally is followed by significant increases in systemic levels of IL-6 with only modest systemic reactions in TNFalpha and IL-1beta, even in patients with an inflammatory disease. However, there are in general significantly increased local levels of IL-1beta, IL-6, IL-8 and IL-10, and our conclusion is that systemic cytokine levels might not reflect local reactions.
-
Scand. J. Clin. Lab. Invest. · Jan 2009
Variability in aggregometry response before and after initiation of clopidogrel therapy.
Evaluation of clopidogrel therapy by in vitro methods has limitations which may be of clinical importance. We wanted to explore the variability in aggregometry response in aspirin sensitive patients before and after initiation of clopidogrel therapy. ⋯ Inter-individual differences in ADP aggregation were significant both before and during clopidogrel therapy, and there were significant intra-individual variations over time. Therefore, prediction of aggregometry response before or during clopidogrel therapy based on single tests may be unreliable. Inter-individual differences in healthy controls are smaller at high concentrations of ADP, and comparisons of aggregometry response should be performed with caution unless ADP concentrations are standardized.
-
Scand. J. Clin. Lab. Invest. · Jan 2009
Adiponectin as a biomarker of systemic inflammatory response in smoker patients with stable and exacerbation phases of chronic obstructive pulmonary disease.
Adiponectin is an adipose tissue-derived specific protein that has a role in energy homeostasis, that has a protective role against the development of insulin resistance and atherosclerosis and that exhibits anti-inflammatory properties. We investigated serum adiponectin as a biomarker of systemic inflammatory response and its relation with leptin, C-reactive protein (CRP), erythrocyte sedimentation rate (ESR) and nitric oxide (NO) in chronic obstructive pulmonary disease (COPD) patients. ⋯ Adiponectin may be a marker of low-grade systemic inflammatory response in COPD. A further rise in serum adiponectin in the exacerbation period denotes that this may also be a biomarker of the exacerbation phase as well as CRP and ESR.
-
Scand. J. Clin. Lab. Invest. · Jan 2009
Activity of selected enzymes in erythrocytes and level of plasma antioxidants in response to single whole-body cryostimulation in humans.
The influence of extremely low temperatures on the human body and physiological reactions is not fully understood. The aim of this research was to estimate the influence of a single exposure to cryogenic temperature (-130 degrees C), without subsequent kinesiotherapy, on the activity of the most crucial antioxidant enzymes in erythrocytes: superoxide dismutase (SOD), catalase (CAT), glutathione reductase (R-GSSG), glutathione peroxidase (GPx) and glutathione transferase (T-GSH). In the plasma, the concentrations of glutathione, uric acid, albumins and extra-erythrocyte haemoglobin as components of the non-enzymatic antioxidant system were evaluated. ⋯ We observed an increase in the concentrations of all the examined non-enzymatic antioxidants, especially extra-erythrocyte haemoglobin and uric acid, which had both increased further the day after cryostimulation. The results indicate that a single stimulation with cryogenic temperatures results in oxidative stress in a healthy body, but that the level of stress is not very high. It seems that in this case the most significant role in the antioxidant mechanisms is played by peroxidase.