Title |
Pacientes com lúpus eritematoso sistêmico e síndrome antifosfolípide secundária possuem números reduzidos de células B CD4+ CD25+ Foxp3+ (células Treg) e células B CD3– CD19+ circulantes
|
---|---|
Published in |
Revista Brasileira de Reumatologia, May 2014
|
DOI | 10.1016/j.rbr.2013.09.001 |
Pubmed ID | |
Authors |
Ester Rosári Raphaelli Dal Ben, Carine Hartmann do Prado, Talita Siara Almeida Baptista, Moisés Evandro Bauer, Henrique Luiz Staub |
Abstract |
CD4+CD25+Foxp3+ regulatory T (Treg) cell depletion has been reported in systemic lupus erythematosus (SLE) and, recently, in primary antiphospholipid syndrome (APS); the issue has not been studied in SLE patients with secondary APS (SLE/APS) so far. To quantify total lymphocytes, Treg cells, CD3+CD19- T cells and CD3-CD19+ B cells in SLE/APS patients and healthy controls. Cell subtypes underwent immunophenotyping using specific monoclonal antibodies (anti-CD3 CY5, anti-CD4 FITC, anti-CD25, anti-Foxp3, anti-CD19 PE) and flow cytometry. Twenty-five patients with SLE/APS (mean age 43.5 years, 96% females, 96% caucasians, mean duration of disease 9.87 years, mean SLEDAI 10 ± 5.77) and 25 age and sex-matched controls entered the study. It was realized that the numbers of Treg and CD3- CD19+ B cells were significantly lower in SLE/APS patients than in controls (all p < 0.05).Treg and CD3-CD19+ B cells remained numerically low after controlling (ANCOVA) for percentage of total lymphocytes (p < 0.05). Decreasing levels of circulating Treg and CD3-CD19+ B cells correlated to higher scores of lupus activity (rs = -0.75, p < 0.0001; rs = -0.46, p = 0.021, respectively). Number of Treg cells and CD3-CD19+ B lymphocytes did not significantly differ in users or nonusers of chloroquine, azathioprine and corticosteroids (all p > 0.05). In this preliminary study, patients with SLE and secondary APS showed depletion of Treg and CD3-CD19+ B cells; decreasing numbers of both subtypes correlated to a higher SLEDAI. Treg cells depletion might contribute to the autoimmune lesion seen in patients with SLE/APS. The reduced number of CD3-CD19+ B cells seen in these patients deserves more studies in order to get further elucidation. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 5 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Master | 2 | 40% |
Student > Doctoral Student | 1 | 20% |
Other | 1 | 20% |
Unknown | 1 | 20% |
Readers by discipline | Count | As % |
---|---|---|
Biochemistry, Genetics and Molecular Biology | 1 | 20% |
Agricultural and Biological Sciences | 1 | 20% |
Economics, Econometrics and Finance | 1 | 20% |
Medicine and Dentistry | 1 | 20% |
Unknown | 1 | 20% |