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Article Glucocorticoids severely impair differentiation and antigen presenting function of dendritic cells despite upregulation of Toll-like receptors. 2006
Rozkova D, Horvath R, Bartunkova J, Spisek R. · Institute of Immunology, Charles University, 2nd Medical School, V Uvalu 84, Prague 5, Czech Republic. · Clin Immunol. · Pubmed #16765091 No free full text.
Abstract: Glucocorticoids (GCs) are widely used as anti-inflammatory and immunosuppressive agents. Effects of GC have mainly been attributed to the suppression of T cells. Recently, several studies have indicated the role of dendritic cells (DC) in GC-mediated immunosuppression. We investigated the effect of GC on characteristics of DC. Given the crucial role of Toll-like receptor (TLR) triggering for the initiation of DC maturation program, we analyzed the expression of TLR2, 3, 4 by GC-treated DC. To extend our in vitro findings, we analyzed the distribution of DC subsets in the blood of patients treated with high-dose corticosteroids. DC differentiation in presence of GC was skewed to a qualitatively distinct population incapable of inducing an efficient immune response, whereas GC presence during the process of maturation significantly reduced DC IL-12 p70 and TNF production and T cell stimulatory function. Despite the fact that GC increased expression of TLR2, 3 and 4 on DC, their stimulation with TLR-derived signals did not induce maturation. Administration of high-dose GC to the patients with systemic autoimmunity induced a decrease of circulating myeloid DC and abrogated plasmacytoid DC. These findings provide further insights into the mechanisms of GC immunosuppressive functions and reveal additional mechanisms of their therapeutic efficiency.
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Article Primary Sjögren syndrome in the paediatric age: a multicentre survey. 2003
Cimaz R, Casadei A, Rose C, Bartunkova J, Sediva A, Falcini F, Picco P, Taglietti M, Zulian F, Ten Cate R, Sztajnbok FR, Voulgari PV, Drosos AA. · Clinica Pediatrica, Istituti Clinici di Perfezionamento, Via Commenda 9, 20122 Milano, Italy. · Eur J Pediatr. · Pubmed #12898241 No free full text.
Abstract: Primary Sjögren syndrome (SS) is very rare in childhood. We collected a series of primary paediatric SS cases from different centres. A data collection form was prepared and sent to rheumatologists who were willing to participate. Data on 40 cases of primary SS with onset before the 16th birthday were collected. Almost all patients (35/40) were females, age at onset varied from 9.3 to 12.4 years (mean 10.7 years). Signs and symptoms at disease onset were mainly recurrent parotid swelling followed by sicca symptoms. Abnormal laboratory tests were found in the majority of cases. Regarding treatment, 22 patients were treated at some time with oral corticosteroids, seven with non-steroidal anti-inflammatory drugs, and five with hydroxychloroquine; two patients needed cyclosporine and one cyclophosphamide. Follow-up varied from 0 to 7.5 years from onset, without major complications in the majority of patients. CONCLUSION: recurrent parotid swelling is a common feature of primary Sjögren syndrome in childhood and often occurs as a presenting feature. Sicca symptoms may be rarer.
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