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Molecular profiling of regulatory T cells in pulmonary sarcoidosis. | LitMetric

Molecular profiling of regulatory T cells in pulmonary sarcoidosis.

J Autoimmun

Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa Str. 7, 30-387 Krakow, Poland; Kardio-Med Silesia, M. Curie-Sklodowskiej Str. 10C, 41-800 Zabrze, Poland. Electronic address:

Published: November 2018

AI Article Synopsis

Article Abstract

Background: Sarcoidosis is characterized by exaggerated immune response to unknown agent and can affect different organs. One of the main players in the pathology of the disease are regulatory T cells (Tregs), however, up to date the mechanisms of the possible molecular alterations of this particular cell subset are not known.

Methods: In the current study we looked for the global transcriptomic changes of miRNAs, using predefined array, and mRNAs (RNA seq analysis) of Tregs of patients with the most predominant form of the disease - acute pulmonary sarcoidosis (PS). For this purpose sorted CD4+/CD25+/CD127- Tregs from peripheral blood (PB) and CD4+/CD25 + Tregs from bronchoalveolar lavage (BAL) were used.

Results: MiRNA analysis revealed that Tregs isolated from PB and BAL display significantly different miRNA profile, suggesting an important role of the pulmonary microenvironment in creating these changes. Among disease-related miRNAs of PB Tregs we identified miR-155 and miR-223. Moreover, looking at the global transcriptome of PB Tregs, we recognized alterations in TLR-2 signaling pathway and in the downstream of NF-κB apoptosis and proliferation signals. However, induction of TLR-2 expression was found not only in Tregs, but also in the heterogeneous population of peripheral blood mononuclear cells (PBMC) as well as two PBMC subpopulations (CD4+/CD25-and CD4-/CD25-) of patients with PS. This indicates that activation of TLR signaling pathway in sarcoidosis does not occur only in Tregs.

Conclusion: Our findings offer a deeper insight into the molecular mechanisms of Tregs reduced suppression and increased apoptosis in patients with PS. Based on the current results, future studies should focus on possible therapeutic effect of TLR-2 signaling inhibition.

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Source
http://dx.doi.org/10.1016/j.jaut.2018.07.012DOI Listing

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