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CXCL13 Production inB Cells via Toll-likeReceptor/LymphotoxinReceptor Signaling IsInvolved in LymphoidNeogenesis in ChronicObstructive PulmonaryDisease Eleni LitsiouMaria SemitekolouIoanna E. Galani2013 год

CXCL13 Production in B Cells via Toll-like Receptor/Lymphotoxin Receptor Signaling Is Involved in Lymphoid Neogenesis in Chronic Obstructive Pulmonary Disease
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Страница публикацииПубликация в OpenAlex
Аннотация: Little is known about what drives the appearance of lymphoid follicles (LFs), which may function as lymphoid organs in chronic obstructive pulmonary disease (COPD). In animal infection models, pulmonary LF formation requires expression of homeostatic chemokines by stromal cells and dendritic cells, partly via lymphotoxin.To study the role of homeostatic chemokines in LF formation in COPD and to identify mechanism(s) responsible for their production.Peripheral lung homeostatic chemokine and lymphotoxin expression were visualized by immunostainings and quantified by ELISA/quantitative reverse transcriptase-polymerase chain reaction in patients with COPD with and without LFs. Expression of lymphotoxin and homeostatic chemokine receptors was investigated by flow cytometry. Primary lung cell cultures, followed by ELISA/quantitative reverse transcriptase-polymerase chain reaction/flow cytometry, were performed to identify mechanisms of chemokine expression. Polycarbonate membrane filters were used to assess primary lung cell migration toward lung homogenates.LFs expressed the homeostatic chemokine CXCL13. Total CXCL13 levels correlated with LF density. Lung B cells of patients with COPD were important sources of CXCL13 and lymphotoxin and also expressed their receptors. Cigarette smoke extract, H2O2, and LPS exposure up-regulated B cell-derived CXCL13. The LPS-induced increase in CXCL13 was partly mediated via lymphotoxin. Notably, CXCL13 was required for efficient lung B-cell migration toward COPD lung homogenates and induced lung B cells to up-regulate lymphotoxin, which further promoted CXCL13 production, establishing a positive feedback loop.LF formation in COPD may be driven by lung B cells via a CXCL13-dependent mechanism that involves toll-like receptor and lymphotoxin receptor signaling.
Год издания: 2013
Авторы: Eleni Litsiou, Maria Semitekolou, Ioanna E. Galani, Ioannis Morianos, Aikaterini Tsoutsa, Panagiota Kara, Dimitra Rontogianni, Ion Bellenis, Maria Konstantinou, Κonstantinos Potaris, Evangelos Andreakos, Paschalis Sideras, Spyros Zakynthinos, Maria Tsoumakidou
Издательство: American Thoracic Society
Источник: American Journal of Respiratory and Critical Care Medicine
Ключевые слова: Chronic Obstructive Pulmonary Disease (COPD) Research, Asthma and respiratory diseases, Pediatric health and respiratory diseases
Другие ссылки: American Journal of Respiratory and Critical Care Medicine (HTML)
PubMed (HTML)