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Downregulation of P53 by Insufficient CTCF in CD4 T Cells Is an Important Factor Inducing Acute Graft-Versus-Host Disease

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Journal Front Immunol
Date 2020 Nov 2
PMID 33133081
Citations 5
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Abstract

Recent evidence indicates that p53 plays a protective role against various systemic autoimmune diseases by suppressing pro-inflammatory cytokine production and reducing the number of pathogenic T cells. However, whether abnormal p53 expression participates in the development of acute graft-versus-host disease (aGVHD) remains unclear. In this study, we demonstrated that p53 was downregulated in CD4 T cells from patients with aGVHD compared with the non-aGVHD group. Furthermore, we confirmed that low expression of CCCTC-binding factor (CTCF) in CD4 T cells from aGVHD cases is an important factor affecting histone H3K9/K14 hypoacetylation in the promoter and p53 downregulation. Restoring CTCF expression in CD4 T cells from aGVHD patients increased p53 amounts and corrected the imbalance of Th17 cells/Tregs. Taken together, these results provide novel insights into p53 downregulation in CD4 T cells from aGVHD patients.

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