CLINICAL MANIFESTATION AND EPIDEMIOLOGICAL PECULIARITIES OF LEPTOSPIROSIS AT THE MODERN STAGE IN GEORGIA.

Introduction: Leptospirosis is considered one of the most common zoonotic infections in the world and is characterized by distribution in countries of subtropical and tropical zones. In Georgia A sharp increase in the frequency of leptospirosis began in 2011, and the morbidity rate increased to 16.3.

Possible link between familial susceptibility to cancer and the level of oxidative stress in thyroid cancer patients.

Background: Hereditary cancer is estimated to account for up to 10% of the worldwide cancer burden; 5% of all thyroid cancers are thought to be genetic. Inheritance of a deleterious mutation in genes associated with a high lifetime risk of developing cancer. Cancer-predisposing genes can promote the initiation and progression of thyroid cancer by enhancing the activation of major signaling pathways through oxidative stress mechanisms.

Comprehensive study of the rheological status and intensity of oxidative stress during the progression of type 2 diabetes mellitus to prevent its complications.

Background: Prevention of Type 2 diabetes mellitus (T2DM) requires a modifying effect on the pathological processes inducing the β-cell dysfunction.

Objectives: the comprehensive study of the violation of rheological parameters in patients with different stages of diabetes and identification of possible links between these alterations with the intensity of the oxidative stress in the patient's body.

Methods: 60 patients with IR, prediabetes, T2DM and healthy volunteers were included.

Some Aspects of Role of Nitric Oxide in the Mechanisms of Hypertension (Experimental Study).

Background: Modulation of endothelial function is a therapeutic option to reduce some of the significant complications of hypertension. However, the relationship between endothelial dysfunction reduced nitric oxide (NO) production, and the development of hypertension is not fully understood. To establish a potential pathogenetic link between impaired NO synthesis and hypertension, we investigated the results of competitive interaction of the substrate of NO synthase, L-arginine, and its analog, an non-selective inhibitor of NO synthase, N-nitro-methyl ether-L-arginine (L-NAME), in experimental rats.

NEW APPROACHES TO THE TREATMENT OF PERIIMPLANTITIS (REVIEW).

Implant therapy, a modern treatment option for completely and partially edentulous patients. However, numerous clinical studies indicate a sufficiently large number (9-20%) of the failure rate of implants. The achievement of osseointegration depends on many factors, such as a suitable host, alteration in bone metabolism, hormone balance, smoking habits, and local conditions (quantity and quality of bone, biocompatible materials, traumatic surgical technique, occlusal conditions, quality of dental implants, and corrosion of the metal of implants, thoroughness of surgery and healing time).

RISK-FACTORS OF CORONARY ARTERY DISEASE (REVIEW).

The treatment of coronary arteries disease (CAD) and the prevention of their complications, intervention on the coronary arteries is usually recommended. In this review, with the aim of improving the treatment outcomes of patients with CAD, requiring percutaneous coronary intervention and/or coronary artery bypass grafting,risk factors of developing coronary syndrome are discussed. Understanding the causes of the disturbance of coronary artery conduction will provide a new perspective for improving patient treatment outcomes.

[EPIDEMIOLOGICAL CHARACTERIZATION AND PATHOGENETIC PECULIARITIES OF DENTAL CARIES IN ADOLESCENTS].

The goal of this study was to determine the spread and intensity of dental caries in the adolescents and study the characteristics of damage to create the unified method of prognosis and development risk level of the aforementioned pathology. Impact of risk factors on the mineralization of hard tissue of tooth was studied in the 381 adolescents aged 11-16. The study found that dental caries spread among the research group was high, with the 77.

[SELECTIVE EFFICACY OF GEORGIAN LEGUME EXTRACTS ON JURKAT AND MDCK CELLS].

The goal of our study was to establish the anti- proapoptotic activity of the common in Georgia crops on the Jurkat and MDCK cells. Extracts of various varieties of beans (Tirkmela, Batumi meadow, Shulavera, Udelebi, as well as green peas, Lens Culinaris lentils, soy beans) were added to the intact or incubated under oxidative stress conditions Jurkat and MDCK cells. Cell viability (apoptosis intensity) was determined by a cell proliferative activity test (MTT test).

[RADIOPROTECTIVE ACTIVITY OF POLYMETOXY-LATED FLAVONOIDS OF CITRUS EXTRACT].

The aim of the study was to establish the radioprotective activity of citrus polymetoxylated flavonoids extract (CPMFE) on the X-irradiated rats. The experiments were carried out on white Wistar rats. Animals were irradiated with X rays in doses of 5 Gy and 7 Gy.

IMPACT OF LASER THERAPY ON THE PROLIFERATION OF VARIOUS CULTURED CELLS.

The purpose of our study was to establish the laser effects on the epithelial tissue and immune metabolism. The research was conducted on human leukemic mature T cells (Jurkat cells) (DSMZ-Deutshe Sammulung von Mikroorganismen und Zellkulturen (Germany)) and MDCK cell line (Lugar Laboratory, Tbilisi, Georgia). Cells were radiated by Laser device "ОПТОДАН"- АЛСТ-01 (power 5 W) 3 -7 days (4 minutes per day).

Constituents of French Marigold (Tagetes patula L.) Flowers Protect Jurkat T-Cells against Oxidative Stress.

The flowers of French marigold (Tagetes patula L.) are widely used in folk medicine, in particular for treating inflammation-related disorders. However, cellular mechanisms of this activity demand further investigation.

[Parodontitis pathogenetic factors, their interaction and effects].

Induced by microbial intervention oxidative stress causes electronic transport disorder in gingival cells mitochondrias as well as decrease of energogenesis and increase of lipoperoxidation. In oral cavity local immunity is decreased in parodontitis, that is related with immunoglobulin A deficiency and lysozyme activity decrease. Against this background, microbial factors damaging effect on periodont is intensified.

[The variants of changes in pro- and antioxidative processes in viral hepatitis and the necessity of differential approach in their antioxidative therapy].

There was investigated the changes in pro- and antioxidative processes in viral hepatitis of different etiology. It was revealed that the mechanisms mentioned above essentially differ from each other and for their treatment, accordingly, different groups of antioxidative drugs should be used. The data obtained indicates the impossibility of "universal" antioxidative therapy.

[The role of apoptosis in the development of virus hepatitis].

In present review hepatocyte apoptosis is presented as universal defensive reaction of liver, to the damages. Hepatocyte apoptosis may be caused by hepatotropic virus's direct affection, or by the immune reactions initiated by viruses. Apoptosis development caused by virus direct affection varies and contains at lest two mechanisms: production of specific proteins: B virus - X protein and C virus - core-protein; expression of the receptors leading the induction of this process on the hepatocyte membrane, for example, increasing of Fas-receptor and cell sensation to apoptosis stimulus.

[The impact of ecopathologic factors on the development of dental diseases].

Environment pollution is listed as the most significant problem of the 21st century. In cities throughout the world, long periods of heavy air pollution have caused increase of illness rates. Effect of air pollution on the dental status of children in Tbilisi, Georgia (Caucasus) was studied.

[Molecular mechanisms of apoptosis].

Apoptosis is the vital issue of Biology and Medicine. Recent concept of molecular and cellular mechanisms of apoptosis--a well-controlled form of cell death was reviewed. The aim of a review was to broaden knowledge of apoptosis mechanism and to reveal molecular targets for the modulation of these processes.

[Application of Populus Nigra preparations at experimental parodontitis].

Severe oxidative stress, developed under experimental periodontitis is accompanied by disturbances in mitochondrial respiration in tissue cells of gingiva, membrane damage and release of Fe(2+) and Mn(2+), leading to the worsening of inflammation process and gingival tissue necrosis. Reduction of free nitric oxide in gingival tissue appeared to be characteristic for experimental parodontitis: decreases local immunity, antimicrobial resistance, and tissue regeneration, disturbs blood supply and tissue trophism, which forwards important role in deepening of inflammation process and wasting of gingival tissue. Application of preparations derived from black poplar (Populus Nigra) gemma standardizes mitochondrial respiration, reduces presentation of inflammation, and considerably improves EPR-spectrum of gingival tissue.

[Content and metabilism of nitric oxide in substrates of oral cavity and their role in pathogenesis of periodontite disease].

Content and metabolism of free NO in saliva, fluids of periodontal pockets and gingival tissue has been investigated by EPR (electron paramagnetic resonance) method with the use of nitric oxide spin-trap in patients suffering from periodontitis. It was found that increased generation of nitric oxide at early stages of periodontitis is of protective nature. However, at serious disorders of mitochondrial respiration and exaggerated formation of generators of reactive oxygen, nitric oxide converts into citotoxic peroxinitrite leading to destruction of parodontal tissue; part of free nitric oxide produces FeSNO, which in turn, supports and decreases content of free NO in gingival tissue.

[The role of changes in tissue redox-status in mechanism of paraneoplasia].

To specify mechanisms of paraneoplastic alterations of redox-status of tissues in experimental malignant tumor growth, we investigated electronic paramagnetic centers of blood, skeletal muscle and liver with electronic paramagnetic resonance (EPR) method. We also studied the concentration and activity of antioxidant enzymes. Our experiments on adult white male rats of mixed population with sarcoma C-45 and mice with Ehrlich carcinoma have shown that malignant tumor growth leads to enhanced lipid peroxidation (LPO): production of potent LPO promoters - Fe2+, Mn+2+, NO, ubiquinone; depression of antioxidant defence - reduced production of total ceruloplasmin, elevated blood levels of oxidized ceruloplasmin and enhanced catalase activity.

Changes in the prooxidant and antioxidant status of tissues during paraneoplastic processes.

Electron paramagnetic resonance was used to identify paramagnetic centers in the blood and liver of laboratory rats with S-45 sarcoma and mice with Ehrlich carcinoma. Paraneoplastic changes in prooxidant and antioxidant activity of the blood and liver tissue, mitochondrial respiration, and NO metabolism and inhibition of antioxidant processes contribute to impairment of cell membrane structures, erythrocyte hemolysis, and hypoxia. An important role of these processes in the pathogenesis of paraneoplastic anemia is confirmed by the positive effect of antioxidant and membrane-stabilizing therapy.

[Relationship between lipid peroxidation processes, blood vessel wall changes and properties of erythrocytes in pathogenesis of microhemocirculation disorders during experimental diabetes mellitus].

The microhemocirculation play the main role in the development of the micro-and macroangiopathy during Diabetes Mellitus. The aim of our work was to study changes of free-radicals and deformability of erythrocytes using the filtration-photometric and electronic-paramagnetic methods in white rats during Alloxan Diabetes at different stages. Erythrocytes deformability was estimated by the time needed for erythrocytes passage through the filter and state of blood and blood vessels walls were studied by the EPR method.

[Oxidative stress as common pathological phenomenon and possibilities of its correction].

It was shown that disorders of oxidative metabolism play an important role in the pathological processes which develops at subcellular level -- disorder of electron transport at ubichinon-oxidoreductase locus of respiratory chain in mitochondria. The latter could be discussed as common pathological phenomenon determining oxidative stress. It is found that altered synthesis and metabolism of nitric oxide plays an important role in the pathogenesis of oxidative stress.