LEADING ARTICLE
REVIEWS AND LECTURES
neurohumoral, hemodynamics and hypoxic mechanisms of renal sclerotic damage. Earliest of them is compensatory by the nature narrowing efferent glomerular arterioles, promoting increase in filtration fraction and occurrence of steady glomerularhypertension causing mechanical damage of fenestrial endothelium, podocytes and glomerular mesangial cells. In formation of this renal hemodynamics defect the mainly role is played with hyperactivity of circulating reninangiotensinaldosterone system
(RAAS) and renal tissue reninangiotensin system (RAS). In process of the further infringement postglomerular blood flow and occurrence in persons with expressed chronic heart failure (CHF) anemia syndrome the mechanism of renal sclerotic damage joins renal tissue hypoxia, the leader to development of hypoxic glomerulosclerosis and tubulointerstititial fibrosis, accelerating loss of kidney function. In CKD progression with CHF also participates to uremic toxin indoxyl sulfate, which possesses the expressive nephrotoxic action. For treatment of chronic kidney disease in patients with CHF, receiving usual drug therapy, various therapeutic approaches are used. They include prevention of intrarenal hemodynamics infringements (correction of dozes of angiotensin converting enzyme (ACE) inhibitors, purpose of preparations with mainly hepatic elimination, addition to ACE
inhibitors AT1angiotensin receptor blockers), easing hypoxic damage of renal tissue (treatment of an anemia by erythropoietin, darbepoetin and iron preparations) and decrease damaging actions on kidneys diuretics and aldosterone receptor antagonists.
ORIGINAL ARTICLES. CLINICAL INVESTIGATIONS
disease, the greatest severity of pain, intoxication, dysuric syndromes, as well as the syndrome of hypertension, compared with the indigenous people of this region (Nenets) and migrant population Circumpolar. Do indigenous peoples (Nenets) North Polar observed particularly in the lipid phase of cellular membranes of red blood cells: a higher content of diene conjugates, malonic dialdegtda, the total content of phospholipids and their degradation products, cholesterol and its esters in the comparison group had to the population of the Far North. CONCLUSION. Revealed features of clinical and laboratory manifestations CPN the inhabitants of the Far North of the Tyumen region, which must be taken into account in diagnostic and therapeutic and preventive measures.
THE AIM. To study of the data of clinical, laboratory and instrumental parameters associated with arterial hypertension (AH) in the prevalent group of programmed hemodialysis (PHD) patients. PATIENTS AND METHOS. The medical examination was carried out in a prevalent group of patients (n=75) without of cardiovascular insufficiency and who had relatively compensated anemia. They received adequate standard PHD 3 times a week. Their mean arterial pressure (APm) measured 5 minutes before the beginning of a hemodialysis session was more than 107 mmHg. A clinical, laboratory and instrumental examination of the patients was conducted. RESULTS. Among the patients involved in the research 3% had «soft», 54% «moderate» and 43% «grave» AH. It has been ascertained that AH is associated with a shorter dialysis experience (r =-0.21), higher mass of a body index (IMB) (r =0.22), presence of pericardium friction noise (r =0.30), dullness of the percussion sound in iferolateral sections of lung fields (r =0.45), presence of moist rales (r =0.71), worse correction of anemia (r=-0.45), lesser iron reserves (r =-0.37) and lesser international normalized relation (INR) (r =0.37). A higher AP is associated with a higher content of C-reactive protein (CRP) (r =0.37), a atherogenic index (r =0.28), higher values of triglycerides (r =0.29), predialysis plasma sodium (r =0.34), potassium (r =0.43) and phosphorous (r =0.14). In addition to that, a high level of AP is associated with the presence of exudation in the pericardium (r =0.23), a higher left ventriculi mass index (LVMI) (r =0.17), a larger size of the right atrium (r =0.21), a higher pressure in the pulmonary artery ( r =0.34) and a lesser ejection fraction (r =0,32). CONCLUSION. Presented clinical, laboratory and instrumental parameters associated with AH may be of practical value for PHD patients' correction therapy.

ORIGINAL ARTICLES. EXPERIMENTAL INVESTIGATION
THE AIM. To assess the effect of antioxidant therapy on renal structure in rats with experimentally induced calcium oxalate nephrolithiasis. MATERIAL AND METHODS. In rats with experimentally induced calcium oxalate nephrolithiasis evaluated structural changes in renal medulla, particularly the distribution of calcium compounds and their size. The oxidative damage (malonic dialdehyde) and antioxidant (mitochondrial superoxide dismutase) markers expression were determined by immunohistochemistry. RESULTS. There are picture of pathohistological restructuring of the renal tissue. Calcium compounds in the tubular system and interstitial space was noted. The morphological signs of activation of oxidative stress and the weakening of the antioxidant defense took place. In a-tocopherol use as antioxidant therapy was noted a certain reduction of expression of the structural adjustment renal oxidative damage to tissues and cells and maintaining a system of enzymatic antioxidant defense. CONCLUSION. Thus, the use of antioxidants has a beneficial effect on morphological structural restructuring kidney in animals with induced nephrolithiasis.

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