[New potential of MTHFR gene variations application as an individual sensitivity marker in evaluation of occupational risk of arterial hypertension under exposure to nose].

The article deals with results of assessing risk of occupationally related hypertension among workers of sylvinitedressing works, with individual sensitivity consideration. Epidemiologic study proved correlation between occupational exposure to noise over 83 dB and hypertension and its predictors - increased activity of serum lipoprotein and homocystein. The studies determined an indicator of the workers' increased sensitivity to arterial hypertension development and to changes in parameters of disordered vascular tone regulation (increased activity of serum lipoprotein and homocystein) under exposure to noise - CT genotype of MTHFR gene. Workers with CT genotype of MTHFR gene, according to epidemiologic analysis, demonstrated increase in relative risk of vascular tone regulation disorders (hypertension predictor). Additional probability ofvascular tone regulation disorders under exposure to noise of 83 dB in sylvinitedressing workers with increased individual sensitivity is estimated at 3%.

[Forecasting a risk of occupationally related diseases in workers engaged into titanium-magnesium production].

Workers of titanium and magnesium production, under occupational exposure to complex of chemical (chlorine, hydrochloride, sulfur dioxide) and physical factors (industrial noise, work hardiness), have arterial hypertension as occupationally related disease, when length of service over 15 years (EF = 71,5%), and nasopharyngitis for length of service over 10 years (EF = 65%). Arterial hypertension risk is mostly associated with increased industrial noise level (F = 1621; R2 0.95; p < 0,001; noise 70,1 dB). Mathematic modelling of nasopharyngitis development probability demonstrated dependence of concentration of chlorine, hydrochloride, sulfur dioxide, chlorine and hydrochloride combination (F = 37-281; R2 = 0,37-0,73; p < 0.001; chlorine 0,63 mg/m3). Complex of parameters (leucocytosis, eosinophilia, increased IgA level), activated cellular immunity (increased CD 16+56+, CD3+CD25+) and absolute phagocytosis characterized nonspecific inflammatory reaction, immunity tension as a response to a complex of chemical factors of titanium and magnesium production. Markers of endoihelial dysfunction and cardiovascular risk (uric acid, VEGF, homocystein, LDLP) and stress marker (cortisol) demonstrate potential effect of occupational factors on vascular wall, metabolic processes and central nervous system, with involvement of

[Forming a community at risk for circulatory system diseases among workers engaged into underground mining].

Forming a community at risk for circulatory system diseases will increase efficiency of medical and prophylactic measures on managing risk of arterial hypertension. Epidemiologic analysis helped to reveal reliable connection between arterial hypertension predictors and work conditions of mining machine operators and supported actualization of high occupational risk suggested in a priori evaluation. Mathematic modelling helped to forecast increase in the disease probability: with noise level of 94 dB after 10 years of work, 17.9% of workers are expected to have arterial hypertension preventing from further occupational activity. Forecasting results of arterial hypertension probability help to form risk groups for medical and preventive technologies managing occupational risk, and predictors enable to specify necessity of individual medical preventive measures.

[Immune and genetic changes in workers exposed to industrial noise and dust].

Comparative analysis covered immune genetic parameters in nonferrous metallurgy workers. The authors demonstrated differences in immune genetic profile between male and female workers, under exposure to combination of occupational hazards: noise and dust. Analysis of gene polymorphism revealed predominant disorders in the female workers, concerning criterion of prevalence for minor allele of genes in 1 and 2 phases of detoxication, neuro-endocrine regulation, lipid and energy metabolism, genes of immune regulation and apoptosis.