Определение возраста человека по образцам крови на основании анализа метилирования CpG-динуклеотидов

Based on the bioinformatic and statistical analysis of the GEO-projects to determine the genome-wide profile of human DNA methylation, a list of 27 CpG dinucleotides with a high predictive potential was formed to create models for prediction of the human age from blood samples. The methylation level was determined for 245 samples of individuals from the Republic of Belarus. The correlation coefficients R were calculated, and the mathematical models for determining the age of an individual were constructed. The average accuracy value of the age prediction from blood samples using 12 CpG-dinucleotides was 3.4 years (for men – 3.3, for women – 3.5). The results obtained will be used as a basis for development of calculators for predicting the age of an individual based on the biological traces for forensic experts.На основании биоинформатического и статистического анализа GEO-проектов по определению полногеномного профиля метилирования ДНК человека сформирован перечень из 27 CpG-динуклеотидов с высоким прогностическим потенциалом для создания моделей предсказания возраста человека по образцам крови. Определен уровень метилирования для 245 образцов индивидов из Республики Беларусь, рассчитаны коэффициенты корреляции R и построены математические модели определения возраста человека. Среднее значение точности предсказания возраста по образцам крови с использованием 12 CpG-динуклеотидов составило 3,4 года (для мужчин – 3,3, для женщин – 3,5). Полученные результаты будут положены в основу разработки калькуляторов предсказания возраста индивида по биологическим следам для экспертов-криминалистов

THE ROLE OF NO SYNTHESIS CORRECTION IN PREVENTION OF CARDIOVASCULAR HYPERTENSIVE REMODELING

Comparative study of preventive effects of two beta-blocking drugs with different mode of action was performed on SHRSP and WKY rats. Morphological and functional parameters – blood pressure, endothelium-dependent vascular relaxation, plasma level of nitric oxide stable metabolites (nitrite/nitrate), cardiac hyperthrophy and vascular remodeling were monitored during chronic nebivolol and metoprolol injection in parallel groups of rats. Nebivolol, a cardioselective beta-blocker with ancillary nitric oxide modulating and vasodilating properties exhibited more significant and stable influence on the monitored parameters than metoprolol lacking the nitric oxide modulating activity and more effectively prevented cardiovascular remodeling in experimental hypertension