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To investigate the association of sICAM-1 and sVCAM-1 with ICAM1 721G&gt;A and VCAM1 1238G&gt;C polymorphisms and rheumatoid arthritis (RA) clinical activity, sixty RA patients and 60 healthy non-related subjects (HS) matched for age and sex were recruited. Soluble adhesion molecules were determined by ELISA technique. Rheumatoid factor (RF), C reactive protein (CRP) and the erythrocyte sedimentation rate (ESR) were measured by routine methods. Disability and clinical activity was measured with Spanish-HAQ-DI and DAS28 scores, respectively. The ICAM1 and VCAM1 polymorphism were identified using the PCR-RFLP procedure. Inter-group comparison showed increased levels of sICAM-1 and sVCAM-1 in RA patients (284 and 481 ng/mL) versus HS (132 and 280 ng/mL); in the RA group, significant correlations between sVCAM-1 and RF ( r = 0.402), ESR ( r = 0.426), Spanish-HAQ-DI ( r = 0.276), and DAS28 ( r = 0.342) were found, whereas sICAM-1 only correlated with RF ( r = 0.445). In RA patients, a significant association with the 721A allele of ICAM1 polymorphism ( p = 0.04), was found. In addition, the allele impact ( G/A + A/A ) of this polymorphism was confirmed, ( p = 0.038, OR = 2.3, C.I. 1.1–5.0). sVCAM-1 and sICAM-1 serum levels reflected the clinical status in RA, independently of the ICAM1 and VCAM1 polymorphism. However, the ICAM1 721A allele could be a genetic marker to RA susceptibility.

Expression of ICAM1 and VCAM1 Serum Levels in Rheumatoid Arthritis Clinical Activity. Association with Genetic Polymorphisms