Effect of a pyrimidine derivative on the level of cytokines in conditions of streptococcal wound infection

Abstract

Diseases caused by Streptococcus pyogenes are one of the significant problems of practical health care, due to the ability of this pathogen to cause morbidity in all age groups of the population with the development of different complications. The streptococcal infection is accompanied, along with infectious and inflammatory symptoms, by a pronounced immune response to Streptococcus pyogenes, which is mediated by the functional activity of monocytes and dendritic cells responsible for the production of pro- and anti-inflammatory cytokines that regulate the interaction, proliferation and functional activity of all participants in the cellular and humoral links of immunity. The purpose is to study the effect of a pyrimidine derivative on the level of pro- (IL-1β, IL-6, IL-8) and anti-inflammatory interleukins (IL-4, IL-10) in conditions of experimental streptococcal wound infection. The study of the effect of the pyrimidine derivative 3-[2-[(4,6-dimethylpyrimidin-2-yl) amino]-2-oxoethyl]quinazolin-4(3H)-one was carried out in vivo on the model streptococcal wound infection. The experiments were carried out on CBA mice 3 months old (20-22 g). Animals were divided into groups: control I–healthy animals, which were injected with water for injection; control II–infected untreated animals; experience I – animals that were treated intraperitoneally with a pyrimidine derivative at a dose of 36 mg/kg for 7 days, starting from the first day of infection; experiment II – animals that were treated intraperitoneally with the reference drug cefepime at an average therapeutic dose of 50 mg/kg in the same regimen as the test compound. The levels of pro- and anti-inflammatory interleukins in blood serum were determined by enzyme immunoassay. The study found that the pyrimidine derivative 3-[2-[(4,6-dimethylpyrimidin-2-yl)amino]-2-oxoethyl]quinazolin-4(3H)-one under conditions of streptococcal wound infection has an immunoregulatory effect, manifested in a decrease in pro-inflammatory and an increase in anti-inflammatory interleukins.