title: [Tumor necrosis factor-alpha and kidney damage in rheumatoid arthritis].
abstract: OBJECTIVE
  To investigate clinical significance of tumor necrosis factor-alpha (TNF-alpha) and kidney damage in patients with rheumatoid arthritis (RA).
  
  
  METHODS
  94 patients (84 women and 10 men, mean age 45.2 +/- 11.9 years and the disease duration 7.5 +/- 6.5 years) with RA and 20 donors were examined. In 37(39.4%) and 57(60.6%) patients radiological stages I-II and III-IV, respectively, were determined. TNF-alpha and C-reactive protein (CRP) were measured by ELISA.
  
  
  RESULTS
  Serum levels of TNF-alpha in patients with RA appeared significantly higher than in donors (10.9 +/- 22.1 pg/ml vs 0.6 +/- 2.0 pg/ml, p < 0.001). 33 (35.1%) of 94 patients had TNF-alpha levels above 6.6 pg/ml. High serum levels of TNF-alpha correlated significantly with the presence of nephrotic syndrome (r = 0.22, p = 0.03) caused by secondary amyloidosis. There were no correlations between high levels of TNF-alpha and sex, age, disease duration, stages and clinical activity in patients with RA. Positive correlation was found between high levels of TNF-alpha and ESR (r = 0.30, p = 0.003), CRP (r = 0.37, p = 0.0001).
  
  
  CONCLUSIONS
  Thus, TNF-alpha may be involved in pathogenesis of amyloidosis in RA.
authors.forename: S V
authors.initials: SV
authors.lastname: Tsybul'ko
authors.forename: A A
authors.initials: AA
authors.lastname: Baranov
authors.forename: A G
authors.initials: AG
authors.lastname: Borodin
authors.forename: N I
authors.initials: NI
authors.lastname: Korshunov
authors.forename: S Iu
authors.initials: SIu
authors.lastname: Kirdianov
mesh_terms: D000328:Adult; D000686:Amyloidosis / Q000209:etiology*; D001172:Arthritis, Rheumatoid / Q000097:blood* / Q000150:complications; D001799:Blood Sedimentation; D002097:C-Reactive Protein / Q000032:analysis; D003627:Data Interpretation, Statistical; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007136:Immunoglobulins / Q000097:blood; D007674:Kidney Diseases / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D009404:Nephrotic Syndrome / Q000209:etiology; D014409:Tumor Necrosis Factor-alpha / Q000032:analysis*
chemical_list: D007136:Immunoglobulins; D014409:Tumor Necrosis Factor-alpha; D002097:C-Reactive Protein
vernacular_title: Faktor nekroza opukholi-alpha i porazhenie pochek pri revmatoidnom artrite.