[Differential-diagnostic features of combined periapical lesions].

The paper describes specific correlation of the clinical and molecular pathogenic features in various types of combined periapical lesions. Endodontic apical lesions combined with periodontal disease are characterized by specific radiological signs, shifts in oral fluid physical and chemical properties, the disruption of nitrogen metabolism, increased iron concentration, collagen disruption and impaired concentration ratio of calcium and phosphorous. General depression of immunoglobulin synthesis and increased concentration of cortisol and estradiol in oral fluid are also typical features of combined periapical lesions.

[Phenotype characteristics of humoral immunity parameters in patients with chronic generalized periodontitis with different blood groups].

Interrelationships between parameters of humoral immunity with AB0 blood groups have been investigated. The highest content of IgA to transglutaminase was found in A(II) patients, while the lowest content was found in AB(IV) patients. The blood content on anti-gliadin IgA was higher in healthy donors.

[Impact of small molecules on intermolecular interactions underlying the ligand technologies in laboratory diagnosis].

Hydrogen peroxide has been found to have a distorting effect on the quality of determination of the serological markers of hepatitis B and C, transglutaminase antibodies: an increase in the percent of false higher (anti-HBsAg, HBeAg, anti-HCV) and false lower (anti-HBeAg) values, and on the results of PCR-based diagnosis (PCR inhibition that was more pronounced especially in low viremia). A possibility of interference of measurement results in the blood metabolite pool should be taken into account in the use of high-technology methods of laboratory analysis. In particular, there may be changes in the detection of immunological and molecular biological methods in hyperpyruvatemia and hyperoxaloacetatemia, with elevated peroxide concentrations during pathological processes.

[Mercurial pollution of air in Blagoveshensk (regional center of Amur area) and health of the citizens].

Total amount of natural and antropogenous mercury in ambient air of Blagoveshensk city, living area air, industrial spaces air exceeds the background values, but does not influence the level of bronchopulmonary diseases, gastro-intestinal and gall pathways disorders in children, adolescents and adults. Occupational intoxications and occupational diseases were not revealed in specialized chemical laboratory staffers.

[AB0 blood group-associated biological variability in the content of metabolites].

The performed studies provided new evidence for biological variability in clinically important analytes, estimated a possible association of the metabolic features and the conservative genetic attribute--the ABO blood group. Certain features in the levels of protein, carbohydrate, lipid, and mineral metabolic parameters were revealed in relation to various blood groups.