title: Vascular endothelial growth factor levels in the serum and synovial fluid of patients with rheumatoid arthritis.
abstract: OBJECTIVE
  To determine the vascular endothelial growth factor (VEGF) concentrations in serum and synovial fluid (SF) from patients with rheumatoid arthritis (RA) and to search for relationships between VEGF levels and clinical and laboratory variables.
  
  
  METHODS
  We measured VEGF levels using an enzyme-linked immunosorbent assay. Serum samples were obtained from 99 RA patients, 49 osteoarthritis (OA) patients, and 80 normal controls. Paired samples of serum and SF were collected from 32 patients with RA and 15 with OA.
  
  
  RESULTS
  The mean serum VEGF concentration was 590.1 pg/ml for RA patients, 286.7 pg/ml for OA patients, and 265.8 pg/ml in controls. The serum VEGF concentration was significantly higher in the RA patients than in the OA patients or the controls (both p < 0.001). Furthermore, the VEGF levels in SF from RA patients were significantly higher than in SF from OA patients (p = 0.017). However, there was no correlation between VEGF levels in serum and SF from the same RA patients. The serum VEGF concentration was correlated with the ESR, serum CRP concentration, serum rheumatoid factor, number of tender and swollen joints, Modified Health Assessment Questionnaire, and patient and physician global assessments of disease activity in RA patients.
  
  
  CONCLUSIONS
  These results suggest that VEGF level is related to RA disease activity, suggesting that VEGF may play some role in the pathogenesis of RA.
authors.affiliation: Department of Internal Medicine, Chonnam National University Medical School, Kwangju, Korea.
authors.forename: S S
authors.initials: SS
authors.lastname: Lee
authors.forename: Y S
authors.initials: YS
authors.lastname: Joo
authors.forename: W U
authors.initials: WU
authors.lastname: Kim
authors.forename: D J
authors.initials: DJ
authors.lastname: Min
authors.forename: J K
authors.initials: JK
authors.lastname: Min
authors.forename: S H
authors.initials: SH
authors.lastname: Park
authors.forename: C S
authors.initials: CS
authors.lastname: Cho
authors.forename: H Y
authors.initials: HY
authors.lastname: Kim
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001172:Arthritis, Rheumatoid / Q000378:metabolism* / Q000473:pathology; D016228:Endothelial Growth Factors / Q000032:analysis / Q000097:blood*; D005260:Female; D006801:Humans; D007596:Joints / Q000473:pathology; D008222:Lymphokines / Q000032:analysis / Q000097:blood*; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000378:metabolism; D012720:Severity of Illness Index; D013582:Synovial Fluid / Q000737:chemistry*; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors
chemical_list: D016228:Endothelial Growth Factors; D008222:Lymphokines; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors