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PD-1/PD-L Pathway P...
PD-1/PD-L Pathway Potentially Involved in ITP Immunopathogenesis
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Nie, M (författare)
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Liu, Y (författare)
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Li, XX (författare)
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Min, YN (författare)
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Yang, DD (författare)
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Li, Q (författare)
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Feng, Q (författare)
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Hou, Y (författare)
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Li, GS (författare)
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Sun, JZ (författare)
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Hou, M (författare)
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Shi, Y (författare)
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- 2019-02-26
- 2019
- Engelska.
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Ingår i: Thrombosis and haemostasis. - : Georg Thieme Verlag KG. - 2567-689X .- 0340-6245. ; 119:5, s. 758-765
- Relaterad länk:
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http://kipublication...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The binding of programmed death 1 (PD-1) to its ligands PD-L1 and PD-L2 on antigen-presenting cells turns off autoreactive T cells and induces peripheral tolerance. Aberrant PD-1/PD-L signalling could result in a breakdown of peripheral tolerance and lead to autoimmune diseases. In this study, we detected PD-1 and PD-L expression on T cells and dendritic cells (DCs) in immune thrombocytopenia (ITP) patients with active disease by flow cytometry. The effects of PD-L1-Fc fusion protein (PD-L1-Fc) on T cells and on secretion of interferon-γ (IFN-γ) and interleukin-2 (IL-2) were detected by flow cytometry and enzyme-linked immunosorbent assay, respectively. Compared with healthy controls, PD-1 expression was significantly increased in CD4+ T cells and CD8+ T cells from patients with active ITP. However, PD-L1 expression on monocyte-derived DCs was lower in patients with active ITP than in healthy controls. In vitro assays revealed that PD-L1-Fc increased T cell apoptosis, inhibited activation and proliferation of CD4+ T cells and CD8+ T cells and decreased IFN-γ and IL-2 secretion in patients with active ITP. These results suggest that the aberrant PD-1/PD-L negative co-stimulatory pathway may play a role in ITP. Enhancing PD-1/PD-L signalling might be a promising therapeutic approach for ITP patients by enhancing T cell apoptosis, inhibiting T cell activation and proliferation and reducing secretion of inflammatory factors.
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Till lärosätets databas
- Av författaren/redakt...
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Nie, M
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Liu, Y
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Li, XX
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Min, YN
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Yang, DD
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Li, Q
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visa fler...
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Feng, Q
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Hou, Y
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Li, GS
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Sun, JZ
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Hou, M
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Shi, Y
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visa färre...
- Artiklar i publikationen
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Thrombosis and h ...
- Av lärosätet
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Karolinska Institutet