Impact of modulators of nitric oxide synthesis on the level of cytokines in bronchoalveolar lavage in experimental antiphospholipid syndrome.

Objective: Aim: The aim of the research is to study the cytokine prof i le (IL-1β, IL 6, TNF-α, IL-4, IL-10) in bronchoalveolar lavage of lungs in experimental APS and its correction with L-arginine and aminoguanidine.

Patients and methods: Materials and Methods: Antiphospholipid syndrome was modeled on white female BALB/c mice. L-arginine (25 mg/kg) and aminoguanidine (10 mg/kg) were used for its correction. The concentration of cytokines in bronchoalveolar lavage from the lungs was assessed using the ELISA test.

Results: Results: It was established that in cases of APS the concentration of proinf l ammatory cytokines IL-1β, IL-6 and TNF-a increased in 1.9, 2.3 and 6.6 times, respectively, compare to the control. At the same time a decrease of the IL-4 in 1.7 and IL-10 in 1.8 times was found in the APS group compare to the control. L-arginine reduced the level of proinf l ammatory cytokines IL-1β by 22%, IL-6 - by 36%, and TNF-α - by 23% compare to the animals with APS. At the same time, the level of anti-inf l ammatory cytokines increased: IL-4 - by 46%, IL-10 - by 57% compare to the APS animal group. Aminoguanidine, a selective iNOS inhibitor, did not cause any signif i cant decrease in pro-inf l ammatory cytokines but the level of anti-inf l ammatory cytokines IL-4 increased by 44% and IL-10 - by 49%.

Conclusion: Conclusions: The precursor of the NO synthesis L-arginine leads to a decrease in the concentrations of IL-1β, IL-6, TNF-a and an increase of IL-4 and IL-10 compare to the group of BALB/c mice with APS.