Comparative study of antibacterial action of iron and copper nanoparticles on clinical Staphylococcus aureus strains

Research objective is to study antibacterial action of nanoparticles of iron and copper on polyantibiotically resistant clinical Staphylococcus aureus strains. Materials and methods include antibacterial action of nanoparticles of copper and iron on 10 Staphylococcus au¬reus strains, isolated from patients with purulent complications stayed in the in-patient department of traumatology and orthopedics. Solutions of powders of iron and copper have been prepared directly before the experiment in concentra¬tion from 0,001 to 1 mg/ml. it has been revealed that the influence of nanoparticles on growth of clinical strains and the intensity of antibacterial effect depends on the form of nanoparticles, their concentration and action time. concentration of 0,1 mg/ml and 1 mg/ ml of iron nanoparticles has provoked the decrease in quantity of microbe cells from 3 to 34 % (p <0,01). in smaller concentrations the reliable antibacterial effect has not been observed. Antibacterial activity of copper nanoparticles has been expressed in a wide range of concentrations from 0,001 mg/ml to 1 mg/ml, even during short-term action (30 minutes) it has provoked reduction of quantity of the microbe cells grown on the firm nutrient medium, 97-100 % in comparison with the control (p <0,001). in conclusion it is to point out that copper nanoparticles have more expressed inhibitory effect on growth of clini��cal strains of golden staphylococcus than iron nanoparticle suspension. inhibition degree depends on superdispersed powder dosage and incubation perio

Genetic pathogenesis of essential arterial hypertension (the review)

It is proved that genetic factors may be considered as fundamental in the development of essential arterial hypertension (AH). Important role in this process belongs to the genes whose products are involved in regulating blood pressure - adrenergic, renin-angiotensin-aldosterone, and homocyclic bradykinin systems. These systems are closely connected by serial and parallel chemical reactions that enable to use genetic testing to determine the state of the whole system. Analysis of polymorphic markers of different groups of genes encoding components of the renin-angiotensin-aldosterone system allows to define the role of each of the pathogenic factor of hypertension in the development of the diseas

Association of polymorphism of CYP2D6 and CYP2C9 genes encoding P-450 proteins of cytochrome with arterial hypertension

Gene polymorphisms of cytochrome P-450 CYP2 encoding proteins of cytochrome P-450 are essential forantihy-pertensive drugs metabolism. Purpose: We study the associations of functionally defective allele variants of CYP2D6 gene and CYP2C9 gene with the degree of arterial hypertension (AH). Materials and methods: Samples of DNA of leukocytes of blood of 150 patients with AH without the associated clinical conditions (56% of women) at the age of 20-59 years have been investigated. For the study of polymorphism of genes the pharmacogenetic biochip developed in the Institute of Molecular Biology n.a. V. A. Engelgardt has been used. Comparison of frequencies of occurrence of signs has been carried out on the basis of chi-square criterion. Results: It has been revealed that homozygotes by mutant A1075C, C430T alleles of CYP2C9gene and G1934A of CYP2D6 gene have been significantly more common among patients with hypertension III (p=0.01). Conclusion: The research works on genes of system of P-450 cytochrome have important clinical value for rationalization of pharmacotherapy of hypertension. The increased frequency of occurrence of mutant allele of CYP2D6 and CYP2C9 genes in patients with hypertension III requires special attention to the problem of efficiency and safety of application of hypotensive drugs for the patients