A2 adenosine receptor contributes to the development of cow’s milk protein allergy via regulating regulatory T cells | ||
| Iranian Journal of Basic Medical Sciences | ||
| دوره 24، شماره 10، دی 2021، صفحه 1380-1387 اصل مقاله (1.11 M) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.22038/ijbms.2021.57614.12812 | ||
| نویسندگان | ||
| Chuan-Ying Li؛ Zhen Qin؛ ShaoHua Mei؛ Yan Hu؛ Cheng Wu* | ||
| Department of Gastroenterology, Anhui Provincial Children’s Hospital (Children’s Hospital of Anhui Medical University), Wangjiang East Road No.39, Hefei, 230051, China | ||
| چکیده | ||
| Objective(s): A2 adenosine receptor (A2AR) is a novel promising target for the treatment of inflammatory and allergic diseases. However, its role in the development of cow’s milk protein allergy (CMPA) has not been elucidated. The present study was designed to investigate the function of A2AR in CMPA development. Materials and Methods: BALB/c mice were sensitized and challenged with ovalbumin (OVA) to induce allergic responses. The model was assessed by detecting allergic responses and plasma-specific IgE levels. The levels of A2AR were measured by PCR and flow cytometry. The subpopulation of Treg cells was analysed. Results: The mice sensitized and challenged with OVA showed classic allergic symptoms, such as acute allergic skin responses, increased anaphylactic shock symptom scores, and higher levels of total IgE, OVA-specific IgE, IgG1 and IgG2a. OVA-sensitized mice and CMPA patients showed decreased levels of A2AR and Treg cells. Interestingly, we observed a positive correlation between A2AR expression and Treg levels in CMPA patients. Further study showed that the A2AR agonist CGS21680 blocked OVA-induced allergic reactions, and the A2AR antagonist KW-6002 amplified allergic responses. Interestingly, CGS21680 not only activated the A2AR-mediated signalling pathway but also caused an increase in the population of Treg cells. In contrast, KW-6002 therapy decreased the levels of Tregs in allergic mice. Conclusion: A2AR expression is downregulated in CMPA. The A2AR-mediated pathway negatively regulates the development of CMPA, at least in part, by amplifying the differentiation of Tregs. | ||
| کلیدواژهها | ||
| Adenosine receptor؛ Allergic response؛ Cow’s milk protein allergy؛ Foxp3؛ Regulatory T cells | ||
| مراجع | ||
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