<p><b>Copyright information:</b></p><p>Taken from "Skewed distribution of proinflammatory CD4CD28T cells in rheumatoid arthritis"</p><p>http://arthritis-research.com/content/9/5/R87</p><p>Arthritis Research & Therapy 2007;9(5):R87-R87.</p><p>Published online 7 Sep 2007</p><p>PMCID:PMC2212553.</p><p></p> Paired samples of synovial fluid (SF) and peripheral blood (PB) from 128 rheumatoid arthritis patients were compared for the frequency of CD4CD28T cells by flow cytometry. Frequencies of CD4CD28T cells in SF tend to be higher in patients with large populations in PB. Comparison of the frequency of CD4CD28T cells in SF from two different synovial compartments. Open circle, elbow; open squares, shoulder joints. Frequencies of CD4CD28T cells in SF and PB in patients seronegative and seropositive for human cytomegalovirus (HCMV). Frequencies of CD4CD28T cells in paired PB and SF of patients seropositive for HCMV
