[Current principles in the screening, diagnosis, and therapy of colorectal cancer].

The data available in the literature on the prevalence of colorectal cancer (CRC), its risk factors and genetic aspects are analyzed. Basic screening tests and their diagnostic value are described. The paper indicates the importance of methods (colonoscopy, occult blood feces analysis, fecal immunochemical test, determination of molecular genetic profile of fecal enterocytes) for the early primary diagnosis of colonic epithelial tumors and techniques (echography, computed tomography, magnetic resonance imaging, positron emission tomography) that are required to specify clinical TNM staging and enable one to choose an optimal treatment policy for CRC patients owing to the estimation of tumor volume and to the diagnosis of reginal and distant metastases.

Binding Potency of Heparin Immobilized on Activated Charcoal for DNA Antibodies.

In vitro experiments showed that heparin adsorbed on activated charcoal can bind antibodies raised against native and single-stranded DNA in a diluted sera pool with a high level of these DNA. Thus, heparin used as anticoagulant during hemosorption procedure can demonstrate supplementary therapeutic activity resulting from its interaction with various agents involved in acute and chronic inflammatory reactions such as DNA- and RNA-binding substances, proinflammatory cytokines, complement components, growth factors, etc. Research and development of heparin-containing carbonic adsorbents for the therapy of numerous inflammatory and autoimmune diseases seems to be a promising avenue in hematology.

[Genetic determinants of antibiotic resistance in oropharyngeal streptococci in patients with chronic obstructive pulmonary disease and in those with asthma].

Aim: To identify oropharyngeal Streptococcus species and to analyze the genetic determinants of antibiotic resistance in patients with asthma and in those with chronic obstructive pulmonary disease (COPD).

Material And Methods: An experimental diagnostic Streptopol+ (Lytech Co. LTD) panel based on a multiplex real-time PCR was applied to investigate the representation of antimicrobial resistance genes (mef and ermB) and the species composition of streptococci isolated from oropharyngeal swab samples from 89 patients with stable COPD and from 51 patients with asthma.

Thymus Polypeptide Preparation Tactivin Restores Learning and Memory in Thymectomied Rats.

We studied the effects of tactivin and splenic polypeptides on learning and memory of thymectomized animals. In 3-week rats, thymectomy blocked active avoidance conditioning. Injections of tactivin (0.

Coherent Fluctuation Nephelometry: A Rapid Method for Urine Screening for Bacterial Contamination.

Express-test by the method of coherent fluctuation nephelometry for urine contamination was carried out on two prototype instruments with standard polystyrene photometric cuvettes. We analyzed 209 and 119 urine samples. Due to high sensitivity of the method, up to 50% negative samples were detected within 10 min by initial opacity and 90% negative samples were detected during 3.

[Molecular mechanisms of lung cancer development at its different stages in nuclear industry workers].

Objective: to assess mutational events in exons 5, 7, and 8 of the p53 gene and to reveal mutant p53 protein in verified cases of morphologically altered (proliferative and precancerous changes, lung cancer) and histologically unaltered, lung tissues in workers exposed to occupational radiation.

Material And Methods: The investigation used formalin-fixed paraffin-embedded unaltered and altered lung tissue blocks (FFPBs) obtained from the human radiobiological tissue repository. The shelf-life of FFPBs was 5-31 years.

Autoantibodies to plasminogen and their role in tumor diseases.

Plasma level of IgG autoantibodies to plasminogen was measured by ELISA in patients with benign prostatic hyperplasia (n=25), prostatic cancer (n=17), lung cancer (n=15), and healthy volunteers (n=44). High levels of IgG to plasminogen were found in 2 (12%) of 17 healthy women, in 1 (3.6%) of 27 specimens in a healthy man, in 17 (68%) of 25 specimens in prostatic cancer, in 10 (59%) of 17 specimens in lung cancer, and in 5 (30%) of 15 specimens in benign prostatic hyperplasia.

[Specific features of the enteric microbiota composition in patients with alcoholic liver cirrhosis].

Aim: To establish the specific features of the taxonomic and functional composition of the enteric microbiota in patients with alcoholic liver cirrhosis (LC).

Subjects And Methods: Metagenomic analysis was used to study the taxonomic composition and functional potential of the enteric microbiota in 20 patients with alcoholic LC. Total DNA was isolated from the patients' fecal samples; thereafter full genome sequencing was carried out.

Excess fertilizer responsive miRNAs revealed in Linum usitatissimum L.

Effective fertilizer application is necessary to increase crop yields and reduce risk of plant overdosing. It is known that expression level of microRNAs (miRNAs) alters in plants under different nutrient concentrations in soil. The aim of our study was to identify and characterize miRNAs with expression alterations under excessive fertilizer in agriculturally important crop - flax (Linum usitatissimum L.

Effect of oxidatively modified and non-modified human serum albumin on luminol-dependent chemiluminescence of human peripheral blood leukocytes stimulated with opsonized zymosan.

We studied the effects of native and oxidized human serum albumin on luminol-dependent chemiluminescence of human peripheral blood leukocytes stimulated with opsonized zymosan. Human serum albumin was added simultaneously with opsonized zymosan at the beginning of the chemiluminescent reaction. Otherwise, leukocytes were incubated with human serum albumin at 37°C for various periods before addition of opsonized zymosan.

Effect of gold nanoparticles on production of reactive oxygen species by human peripheral blood leukocytes stimulated with opsonized zymosan.

We studied the effect of gold nanoparticles on ROS production by leukocytes. ROS production was detected by luminol-dependent chemiluminescence (LDCL) of human peripheral blood leukocytes stimulated with opsonized zymosan. Nanoparticle size was 5, 10 and 30 nm.

Effect of gold nanoparticles coated with plasma components on ADP-induced platelet aggregation.

We studied the effect of gold nanospheres coated with components of autologous blood plasma on ADP-induced platelet aggregation. Gold nanoparticles in the chosen concentration range (5-40 μM) and particle size (5-30 nm) with or without coating produced no activating effect on platelet aggregation caused by aggregation inductor ADP in all applied doses (1.6, 2.

Association of FGFR3 and MDM2 gene nucleotide polymorphisms with bone tumors.

Association study of 6 candidate single-nucleotide polymorphisms (rs7921, rs7956547, rs3761243, rs11737764, rs6599400, rs1690916) was carried out in a group of patients with bone tumors of different histological structure (n=68) and control group of normal subjects (n=96). Significant associations of rs6599400 and rs1690916 polymorphisms with disease risk were detected (odds ratio 2.15 [1.

Studies of oxidant-induced changes in albumin transport function with a fluorescent probe K-35. Metal-catalyzed oxidation.

The dynamics of albumin transport function was studied during metal-catalyzed oxidation of albumin in diluted blood plasma from healthy donors and in the solution of purified albumin using fluorescent probe K-35. The changes were compared with the dynamics of free radical oxidation markers. For oxidation, different concentrations of Cu(2+), Fe(2+), Fe(3+) ions as well as EDTA and H(2)O(2) were used.

Effects of fatty acids on human serum albumin binding centers.

Albumin is a carrier of nonesterified long-chain fatty acids and many other ligands. The status of its binding centers was studied for various proportions of nonesterified long-chain fatty acids and albumin as exemplified by palmitic acid. The status of the binding center was tested by recording K-35 probe fluorescence decay in the subnanosecond band.

Studies of oxidant-induced changes in albumin transport function with a fluorescent probe k-35. Effect of hypochlorite.

The dynamics of changes in albumin transport function during hypochlorite-induced oxidation of isolated albumin in blood plasma and serum was studied with a fluorescent probe K-35. Binding of the probe K-35 to albumin was characterized by effective concentration of albumin. Oxidative modification of proteins was evaluated by the content of carbonyl products of protein oxidation and bityrosine fluorescent products.

Calculation of the liquor system pliability using the mathematical simulation method.

Liquor circulation is a directed flow of the liquor from sites of its secretion to sites of resorption. This slow flow is modulated by pulsation caused by heart work. Phase-contrast magnetic resonance imaging is a method for noninvasive measurements of the linear velocity of these pulses in the cerebral aqueduct.

Effect of oxidation-modified fibrinogen on the formation and lysis of fibrin clot in the plasma.

Turbidimetry studies showed that after addition of thrombin to fresh donor plasma light scatter in the sample increases and slowly attains a plateau. The process of fibrin formation was less intensive in the presence of oxidized fibrinogen. The formation of fibrin clot in lyophilized plasma was characterized by a biphasic kinetic of light scatter, oxidized fibrinogen inhibited both phases of the process.

Effect of iron ions on functional activity of thrombin.

The kinetics of thrombin inhibition by irons ions was studied in the thrombin time test with normal plasma. The kinetic and concentration characteristics for recovery of thrombin activity by desferal were evaluated at various periods of thrombin incubation with iron ions. The thrombin time test showed that incubation of thrombin with iron sulfate in a final concentration of 200 microM for 25-35 min is followed by the loss of thrombin activity.

Antiaggregant effect of taurine chloramines in the presence of serum albumin.

The effects of taurine chloramine derivatives on initial aggregation of isolated platelets suspended in buffered saline were studied. Inhibition of ADP-induced aggregation in pure cell suspension depended on the structure of chloramine antiaggregants. The most effective of them was N,N-dichlorotaurine; its concentration needed for 50% inhibition of aggregation was about 0.

Effect of oxidized fibrinogen on aggregation of activated platelets and neutrophils.

The effect of oxidized fibrinogen on platelet-neutrophil complex formation was evaluated by studying the platelet aggregation (changes in light transmission and turbidimetric assay). Activation of cells by thrombin (0.015 U/ml) in the presence of oxidized fibrinogen was accompanied by the formation of larger intermolecular aggregates of platelets and leukocytes as compared to those detected in experiments with non-oxidized fibrinogen.

Hydrophobic domains determine localization of IncC and IncG full-length proteins of C. trachomatis during their expression in cultured HeLa cells.

Plasmid vectors encoding hydrophilic (IncB, IncC, IncE, IncG) and hydrophobic (IncC, IncG) domains of C. trachomatis incorporation membrane proteins and reporter green fluorescing proteins were constructed. After transfection of HeLa cells with these plasmid constructs, localization of the complex proteins was determined by laser confocal microscopy.

Significance of methods for purification of oligodeoxyribonucleotide probes for the efficiency of gene diagnosis by real-time PCR.

Analysis of the use of real-time PCR with fluorescent registration of results for gene diagnosis of infectious diseases showed that the sensitivity and reliability of quantitative evaluation of DNA targets directly depended on the method of purification of oligonucleotide probes. Chromatographic behavior of synthetic probes carrying various fluorophores and fluorescence quenchers was analyzed. Approaches to optimization of purification methods are proposed enabling elimination of previously undetectable admixtures.