Acute ischemic stroke (AIS) is the most common type of stroke. Recent studies have found that AIS is closely involved in the immune regulation function of regulatory T cells (Tregs). CC motif chemokine ligand 26 (CCL26) is a member of the chemokine family that plays an
essential role in cell activation, cell differentiation, lymphocyte homing, and inflammatory and immune responses. The present study aimed to investigate the role of CCL26 in the regulation of Tregs in AIS. Peripheral blood mononuclear cells (PBMCs) were incubated with a CCL26neutralizing
antibody. The proportion of cluster of differentiation (CD)4+CD25+ forkhead box P3 (FOXP3)+ Tregs was increased, and the expression of FOXP3, phosphorylated signal transducer and activator of transcription 5 (pSTAT5), and that of the immunosuppressive factors, interleukin (IL)10
and transforming growth factor (TGF)β1, was upregulated. Conversely, the expression of immunepromoting factors, such as tumor necrosis factor (TNF)α and IL6 was significantly downregulated. Further experiments using CCL26 recombinant proteintreated PBMCs revealed a decreased proportion
of CD4+CD25+FOXP3+ Tregs and the downregulated expression of FOXP3, pSTAT5, TGFβ1 and IL10. Moreover, the expression of immunostimulatory factors, such as CX3C chemokine receptor 1, TNFα and IL6 was significantly upregulated. On the whole, these results demonstrate that CCL26
regulates the proportion of CD4+CD25+FOXP3+ Tregs and the production of inflammatory factors in PBMCs following AIS via the STAT5 pathway.
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Document Type: Research Article
Department of Neurology, Shanghai Eighth People's Hospital, Shanghai 200233, P.R. China
Geriatric Nursing Ward, Shanghai Eighth People's Hospital, Shanghai 200233, P.R. China
October 1, 2020
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Experimental and Therapeutic Medicine aims to ensure the expedient publication, in both print and electronic format, of studies relating to biology, gene therapy, infectious disease, microbiology, molecular cardiology and molecular surgery. The journal welcomes studies pertaining to all aspects of molecular medicine, and studies relating to in vitro or in vivo experimental model systems relevant to the mechanisms of disease are also included.
All materials submitted to this journal undergo the appropriate review via referees who are experts in this field. All materials submitted follow international guidelines with regard to approval of experiments on humans and animals.
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