[Clinico-pathogenetic significance of enzymes regulating nucleic metabolism in erythrocyte lysates and sera of patients with osteoarthrosis].

Lysates of erythrocytes and sera of 52 patients with osteoarthrosis (OA) and 30 healthy subjects were used used to determine adenosine deaminidase (ADA, AMP deaminase (AMPDA) and adenine deaminidase (AD). Their activities were unrelated to the age and sex of the patients. At admission, patients with OA showed enhanced activity of ADA in sera and reduced activity of AMPDA and AD in lysates compared with normal values. These changes depended on clinical features of OA and were especially pronounced in patients with poly-OA and synovitis. These data suggest participation of enzymes of the adenyl branch of purine metabolism in pathogenesis of OA. Treatment of hospitalized patients allowed to achieve positive dynamics of the above activities coupled to their improved clinical conditions even though enzymatic activity of erythrocyte lysates remained different from that in healthy subjects. It is concluded that enzymatic assays used in the study may be used as additional diagnostic methods for the assessment of synovitis and optimizatic of control over efficiency of OA therapy.

[The clinical diagnostic value of a study of the activity of enzymes of the guanyl branch of purine metabolism in patients with ankylosing spondyloarthritis].

AIM: To assess the diagnosis of the activity of a pathological process in patients with ankylosing spondyloarthritis (AS) and to reveal purine metabolic (PM) changes in relation to the clinical features of AS. MATERIALS AND METHODS: The serum activities of the PM enzymes: xanthine oxidase (XO), guanine deaminase (GDA), guanosine deaminase (GSDA), purine nucleoside phosphorylase (PNP), guanosine phosphorylase (GP), and adenosine deaminase (ADA) were determined in 55 patients (51 males and 4 females) aged 36.0 +/- 1.4 years). A control group comprised 30 apparently age- and gender-matched healthy individuals, as in the study group. RESULTS: On admission, the patients were found to have increased XO, GDA, PNP, and GD activities and decreased GSDA activity. The higher activity of the process was observed, the greater activities of GDA, XO, PNP, GP and the lower activity of GSDA and ADA were. There were the enzymatic activity differences that depended on the degree of pathological process activity, clinical form, the magnitude of X-ray changes, and the degree of joint functional insufficiency. CONCLUSION: The findings suggest that there may be PM disturbances in the immunocompetent cells.

[Purine metabolism enzymes in diagnosis and differential diagnosis of osteoarthritis and gout arthritis]. / Fermenty purinovogo metabolizma v diagnostike i differentsial'noi diagnostike osteoartroza i podagricheskogo artrita.

AIM: To characterize purine metabolism in osteoarthritis (OA) and gout arthritis (GA) diagnosis and differential diagnosis of these diseases. MATERIALS AND METHODS: We estimated xanthine oxidase (XA), xanthine dehydrogenase (XDG), 5'-nucleotidase (5'-NT) activity, esoenzymes of XDG and content of uric acid (UA) in the sera of 44 patients with osteoarthritis and 34 patients with gout arthritis. RESULTS: Hyperuricemia was revealed in 25 percent of patients with osteoarthritis, in 64.7 percent of patients with gout arthritis. XO, XDG, 5'NT activity, XO/XDG activities ratio, XDG-2 esoenzymes and content of UA were increased in OA patients compared to healthy controls. XO, XDG activity, XDG-2 esoenzymes and UA content in GA patients were higher than those in OA patients. CONCLUSION: The enzyme difference found may promote differential diagnosis of OA and GA. The enzyme indices essentially depend on clinical specificity of the disease and can be helpful in the assessment of the treatment efficiency.