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A Breborowicz

Publications and source records attributed to A Breborowicz.

At least 55 records · Page 3Linked to original sources
PubMed1997

[Peritoneum as a dialysis membrane. II. Pathology].

Peritoneal dialysis is an established method of treatment of chronic renal failure. In that paper morphological and functional changes of peritoneum due to the process of long-term dialysis are presented. Morphological changes are observed in mesothelial cells, intercellular junctions, interstitial tissue and blood vessels. Moreover morphological changes in typical complications of chronic peritoneal dialysis, e. g. peritonitis, eosinophilic peritonitis, and sclerosing encapsulating peritonitis are described. Mechanisms of functional disorders during chronic peritoneal dialysis, involving the decreased permeability of the peritoneum, the increased permeability of the peritoneum and the enhanced lymphatic drainage are discussed. The article is the second of two parts presenting physiology and pathology of peritoneum as dialysis membrane.

Biocompatible Materials↗
PubMed1997

Long-term effects of glycylglycine peritoneal dialysis solution with neutral pH on peritoneum in rats.

This study was designed to test the morphological and functional effects of neutral, bicarbonate-based peritoneal dialysis solution containing glycylglycine on the peritoneum of chronically dialyzed rats. Peritoneal dialysis catheters were implanted in 36 rats. The animals were dialyzed twice daily for 4 weeks with a solution containing bicarbonate (35 mmol/L), glycylglycine (10 mmol/L), and 4% of anhydrous glucose (pH 7.35) (group 1; n = 18) or with lactate-based standard 4.25% Dianeal (pH 5.3 (group 2; n = 18). At the beginning of the study, reabsorption of glucose was slower in group 1 (p < 0.02); at the same time, the hyaluronic acid level in the effluent was higher in this group (p < 0.05). However, towards the end of the study these differences disappeared. After 4 weeks of dialysis in rats exposed to bicarbonate-based solution only, the transperitoneal loss of proteins was slower. In morphological studies of the parietal peritoneum, we detected no statistically significant differences between control nondialyzed rats and those exposed to tested solutions. In a biopsy of visceral peritoneum a tendency was observed for increased thickness of peritoneum in rats dialyzed with both tested peritoneal dialysis solutions when compared to control animals. In conclusion, neutral pH glycylglycine peritoneal dialysis solutions seem to be more biocompatible than standard dialysis solutions.

Animals↗
PubMed1997

Alterations of intraperitoneal inflammation by the addition of L-2-oxothiazolidine-carboxylate.

The authors studied the effect of L-2-oxothiazolidine-carboxylate (OTZ), a substrate for intracellular glutathione synthesis, in an in vivo model of lipopolysaccharide (LPS)-induced peritonitis in rats. The addition of LPS to dialysis fluid increased the white blood cell (WBC) count and the nitrite (index of NO synthesis) level in the dialysate. The simultaneous addition of OTZ to the dialysis fluid prevented an increase of WBCs but not of nitrites in the dialysate. Intraperitoneal inflammation was accompanied by a decrease in net transperitoneal ultrafiltration, an increase in the absorption of glucose, and a loss of protein into the dialysate. OTZ partially reversed the effect of peritonitis on net ultrafiltration. Peritoneal leukocytes from rats exposed to LPS showed a reduced concentration of glutathione, an effect that was reversed in the presence of OTZ. These results show that the supplementation of dialysis fluid with OTZ modified the peritoneal reaction to acute inflammation.

Albumins↗
PubMed1997

[Prevalence of allergic diseases in schoolchildren in Krakow and Poznan (based on a standardized ISAAC questionnaire)].

The study population included children aged 6-7 and 13-14 years from primary schools in Kraków (2302 and 2967 children respectively) and Poznań (3132 and 4069 children respectively). The prevalence was assessed using ISAAC questionnaire. In younger age group the number of children with diagnosed asthma and presenting asthma symptoms was significantly higher in Kraków than in Poznań. In older age group higher percentage was observed in Kraków in relation to wheeze ever and nocturnal cough during last year. Pupils from Kraków had symptoms of allergic rhinitis and were diagnosed as allergic rhinitis more frequently than from Poznań. Symptoms suggestive for skin allergy were more often observed in Kraków, but the differences were significant in relation to symptoms during last year in both age groups and in relation to symptoms ever in older age group. Our study revealed discrepancy between the prevalence of symptoms of asthma and allergic rhinitis and the prevalence of established diagnosis.

Adolescent↗
PubMed1997

In vivo model to study the biocompatibility of peritoneal dialysis solutions.

This study was designed to analyze the complex morphologic and functional effects of dialysis solutions on peritoneum in a rat model on chronic peritoneal dialysis. Peritoneal catheters were inserted into 10 male, Wistar rats and the animals were dialyzed twice daily for 4 weeks with 4.25% Dianeal. During the study we observed two opposite effects: healing of the peritoneum after catheter implantation--decreased cell count in dialysate, decreased permeability of the peritoneum to glucose and total protein, increased volume of drained dialysate; and damage to the membrane due to its exposure to peritoneal dialysis solution--increased hyaluronic acid levels in dialysate, a tendency of the peritoneum to thicken when compared to non-dialyzed animals. Our rat model of CAPD may be used for quantitative and qualitative assessment of the effects of peritoneal dialysis solution on the peritoneum during chronic dialysis.

Animals↗
PubMed1996

L-2-Oxothiazolidine-4-carboxylate and N-acetylcysteine as precursors of intracellular glutathione in human peritoneal mesothelial cells.

L-2-Oxothiazolidine-4-carboxylate and N-acetylcysteine as substrates for intracellular glutathione in human peritoneal mesothelial cells were tested. Both substances at concentrations of 0.01 mM and higher augmented the level of glutathione in mesothelial cells. L-2-Oxothiazolidine-4-carboxylate had a milder but more stable effect than N-acetylcysteine. Cells with increased concentrations of the intracellular glutathione were more resistant to injury by free radicals. When used at higher concentrations (> 1 mM), both substances became cytostatic to mesothelial cells as evidenced by growth inhibition.

Acetylcysteine↗
PubMed1996

Intracellular glutathione in human peritoneal mesothelial cells exposed in vitro to dialysis fluid.

Effect of peritoneal dialysis fluids on glutathione (GSH/GSSG) level in human peritoneal mesothelial cells was tested in in vitro experiments. To mimic in vivo conditions, cells were initially exposed to dialysis fluids (Dianeal 1.36%, Dianeal 2.27%, Dianeal 3.86%) that subsequently were diluted with dialysate effluent at time intervals. GSH/GSSG concentration in cells initially decreased but returned to normal values thereafter. This decrease in the intracellular concentration of glutathione was less when pH of the tested dialysis fluid was adjusted to 7.3. In further experiments with mesothelial cells exposed to Earle's salts solution supplemented with glucose and/or lactate, we have shown that in the presence of low pH, lactate is the main factor causing depletion of intracellular glutathione. When added to the dialysis solution at a concentration of 0.1 mM, L-2-oxothiazolidine-4-carboxylate, a precursor of glutathione, not only prevents the initial decrease in glutathione concentration but also augments the final intracellular level of this thiol.

Analysis of Variance↗
PubMed1996

Species-dependent topography of the peritoneum.

Planimetric studies of peritoneal surface area were performed in 10 humans, 12 rabbits, and 15 rats. It was found that the total peritoneal surface area (TPSA) correlated in humans with body surface area (BSA) (r = 0.98, p < 0.0001) and body weight (r = 0.93, p < 0.001), and correlated in animals with body weight (r = 0.80, p < 0.005 in rabbits; and r = 0.88, p < 0.0001 in rats). The area of parietal peritoneum was 18.1 +/- 1.8% of TPSA in humans, 17.8 +/- 1.0% of TPSA in rabbits, and 22.6 +/- 2.1% of TPSA in rats (p < 0.001 vs humans and rabbits). Additionally, the area of peritoneum covering the individual organs (expressed as % of TPSA) was different in humans, rabbits, and rats: for example, the area of peritoneum covering the diaphragm was 6.4 +/- 1.5% of TPSA in humans, which was larger than in animals (3.0 +/- 0.3% in rats, p < 0.0001 vs humans and rabbits; and only 2.1 +/- 0.4% in rabbits, p < 0.0001 vs humans). Presented results show that interspecies variation in the topography of the peritoneum should be taken into account when the results from experimental studies done on animals are extrapolated to humans.

Adult↗
PubMed1996

In vitro detection of hydrogen peroxide in mesothelial cells.

Hydrogen peroxide can be indirectly detected in mesothelial cells by measuring the rate of inhibition of the intracellular catalase activity by 3-amino-1, 2,3-triazole (AT). AT binds and inhibits catalase only in the presence of hydrogen peroxide, and the effect is proportional to the amount of hydrogen peroxide. The effect of AT on catalase activity is prevented in the presence of ethanol. In mesothelial cells in vitro exposed to dialysis fluids (Dianeal 1.36%, 2.27%, and 3.86%) no significantly increased generation of hydrogen peroxide was detected. However, interleukin-1 (IL-1) (10 ng/mL) enhances, within two hours (+40%, p < 0.05), intracellular production of hydrogen peroxide. The presented method of detection of intracellular hydrogen peroxide may be helpful in studies of the pathomechanisms causing mesothelial damage in conditions of peritoneal dialysis.

Amitrole↗
PubMed1996

Effect of vitamin E on peroxidation and permeability of the peritoneum.

Because of the evidence that peritoneal macrophages are activated during peritoneal dialysis, we hypothesised that the injury of the peritoneum is, at least in part, dependent on the intraperitoneal generation of free radicals. The aim of the study was to evaluate the effect of vitamin E on the peroxidation and permeability of the peritoneum during chronic peritoneal dialysis in rats. Supplementation of the intraperitoneally infused saline with vitamin E decreased the peroxidation of peritoneum estimated as the malondialdehyde (MDA) level in rats' omentum. However the permeability of the peritoneum to glucose and protein in vitamin E treated rats was increased. In in vitro study we have found that vitamin E is cytotoxic to human mesothelial cells (HMC) as measured by inhibition of their proliferation and this effect was irreversible. We conclude that vitamin E, despite its antioxidant effect, causes the changes of the peritoneum permeability which could decrease the effectiveness of peritoneal dialysis.

Animals↗
PubMed1996

[Evaluation of the prevalence sensitization to common inhaled allergens in children of school age using skin tests].

The prevalence of sensitization to common inhalant allergens was assessed among schoolchildren using skin prick tests with standard allergen extracts. The results were analysed in relation to asthma and allergy suggestive symptoms. A positive reaction to at least one allergen was observed in 13.5% children. The most frequent was allergy to timothy, then to house dust mite, birch, mugwort, cat dander and dog dander. Children with wheezing, breathlessness and/or rhinitis had significantly more frequent positive test results compared to children without any complaints.

Air Pollutants↗
PubMed1996

[Peritoneum as a dialysis membrane. I. Physiology].

The interest in structure and function of peritoneum increased when it turned out that it may be used as biologic dialysis membrane. The structure of peritoneum is of significant value in the course of peritoneal dialysis. The role of the mesothelium, the interstitium, blood and lymphatic capillaries, major constituents of peritoneum, have been deeply studied. Moreover, it is well known that process of dialysis influence the structure and function of different peritoneal elements. Having more date about physiological structure of these elements, and making conditions of peritoneal dialysis more physiologic might be crucial factors to reduce the amount of complications, and increase the usefulness of this method of treatment. This article is the first of two parts and discusses the peritoneal structure in physiologic conditions and in conditions of peritoneal dialysis.

Epithelium↗
PubMed1995

Risk factors for respiratory symptoms and atopic sensitisation in the Baltic area.

Recent studies have indicated that atopic sensitisation is uncommon while respiratory symptoms are common among schoolchildren in Eastern Europe. Risk factors for respiratory symptoms and atopic sensitisation were evaluated in a cross sectional study involving 2594 schoolchildren (10-12 years) from Sweden (n = 665), Poland (n = 410), and Estonia (n = 1519). The measurements included parental questionnaires and skin prick tests with eight standardised allergens. Multiple logistic analyses demonstrated that atopic heredity was a significant independent risk factor for respiratory symptoms and atopic sensitisation in all the countries. Current dampness and maternal smoking were related to respiratory symptoms whereas domestic crowding, male gender, and passive smoking during infancy were related to atopic sensitisation. Current maternal smoking had a strong dose response association with current coughing attacks (nocturnal cough > 4 weeks or exercise induced coughing attacks) but only in Eastern Europe. A strong inverse relationship was recorded between domestic crowding and sensitisation as the risk for sensitisation increased with decreasing number of persons per room in the household (odds ratio (OR) 0.58, 95% confidence interval (CI) 0.43 to 0.77). Exposure to tobacco smoke at home during infancy was a risk factor for atopic sensitisation but only to animal dander and only in Eastern Europe (OR 1.41, 95% CI 1.03 to 1.93). In conclusion, there were small differences in the pattern of risk factors between Eastern and Western Europe. The only exception was environmental tobacco smoke being a risk factor only in Eastern Europe. The study also suggests that factors related to domestic crowding protect against atopic sensitisation in Estonia and Poland. A higher standard of living with less crowding may give rise to an increasing prevalence of atopic sensitisation also in Eastern Europe.

Analysis of Variance↗
PubMed1995

Changes in biocompatibility of dialysis fluid during its dwell in the peritoneal cavity.

OBJECTIVE: To evaluate the changes in biocompatibility of peritoneal dialysis solutions during intraperitoneal dwell. DESIGN: We studied the effect of the drained dialysates at time 0 and after 30, 60, 120, 240, and 360 minutes of intraperitoneal dwell on the growth of peritoneal mesothelial cells and fibroblasts and the synthesis of proteins by these cells. On one day the patients were dialyzed with glucose-based Dianeal and on alternate days with an amino acid-containing solution based on Travasol. PATIENTS: Dialysates were collected from 4 patients during continuous ambulatory peritoneal dialysis (CAPD) training. RESULTS: Unused dialysis solutions containing glucose or amino acids inhibit growth of mesothelial cells and fibroblasts. Dialysates obtained after 30 or 60 minutes of intraperitoneal dwell support the growth of these cells in a way similar to 10% fetal calf serum, but dialysates drained after a longer dwell of 120-360 minutes had a stronger effect on growth of these cells than did serum. All glucose-based dialysates stimulate the synthesis of collagen in mesothelial cells, whereas they reduce the synthesis of non-collagen proteins. All glucose-based dialysates reduce the synthesis of collagen and non-collagen proteins in fibroblasts compared with the production of these proteins in the presence of serum. CONCLUSION: Changes in the properties of the dialysis solutions during their intraperitoneal dwells do not seem to increase their biocompatibility. Indeed, excessive mitogenic effect and the stimulation of collagen synthesis of the dialysates may induce pathological changes in the peritoneum.

Biocompatible Materials↗
PubMed1995

[Asthma, allergic rhinitis and atopic dermatitis in schoolchildren].

Many reports describe an increase in the incidence of allergies in recent years. Thus the epidemiological studies are necessary for efficacious prophylaxis. The aim of our study was to estimate the prevalence of allergic diseases in schoolchildren. Allergic rhinitis and/or conjunctivitis was observed in 16.7%. Atopic dermatitis occurred in 12.9% cases. We showed the discrepancy between the number of children with symptoms suggestive for asthma (wheezing--11.1%, breathlessness--19.4%, nocturnal cough--4.9%, exercise-induced cough--9.8%) and number of cases diagnosed as asthma (3.2%). Family history of allergy increased the risk of allergic diseases in studied population.

Asthma↗