Metabolic factors determining the effectiveness of hypouricemic treatment of gouty arthritis
Background. The treatment of some forms of articular pathology with gout remains insufficiently effective, and often it’s impossible to achieve normal indicators of uricemia on the background of uric acid-normalizing medicines. The purpose of the study is to evaluate the effect of the initial parameters of purine metabolism and molecules of medium mass (MMM) of different fractions on the effectiveness of uricodepressive and uricosuric therapy of gouty arthritis. Materials and methods. One hundred five patients with primary gout were examined: 92 % of men and 8 % of women aged 26 to 76 years. Before the beginning of the treatment, the content of purine metabolism factors (uric acid, oxypurinol, adenine, guanine, xanthine, hypoxanthine, xanthine oxidase, xanthine deaminase, adenosine deaminase, 5-nucleotidase, molybdenum, lead), as well as MMM of different fractions (aminopeptide (AF), peptide (PF), nucleotide (NF), chromatographic (ChF)) and integral medium molecular index (MMI) were studied in the blood serum. A spectrophotometer SF46, Olympus-AU640 bioanalyzer and an atomic absorption spectrometer with SolAAr-Mk2-MOZe electrographitic atomizer were used. The efficacy of treatment was assessed after 3–5 weeks. Results. In 27 % of cases, a slight improvement was observed, in 68 % — an improvement, in 8 % — a significant improvement. Primary gout occurs with disturbances in the metabolism of uric acid, oxypurinol, purine bases, purine metabolism enzymes and purine-associated microelements. The integral changes of them depend on the type of the joint syndrome, the presence of peripheral and bone tophi, determine bone-destructive articular injuries, while the predictive factor for the severity of arthropathy is considered to be the high level of purine bases in the blood. In cases of gout, the concentration of AF, PF, NF, ChF increases, as well as MMI. Meanwhile, the AF content is closely related to the severity of the joint syndrome, it determines the degree of joint space narrowing and subchondral sclerosis, the development of bone erosions and meniscus changes, and the MMM of different fractions correlate with the parameters of purine metabolism. A significant improvement and improvement during the pathogenetic therapy is observed in 3/4 of patients that is closely related to the form of arthritis, the presence of tophi and intraarticular Hoffa’s bodies, as well as the type of hyperuricemia, depends on the use of febuxostat, statins and fibrates, the state of purine metabolism, levels of MMM, NF and ChF fractions. Conclusions. The studied metabolic factors are not only involved in the pathogenesis of gouty arthritis, but also have an impact on the efficacy of uric acid-normalizing drugs.
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