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Yu D, Liu JQ, Mo LH, Luo XQ, Liu ZQ, Wu GH, Yang LT, Liu DB, Wang S, Liu ZG, Yang PC. Specific antigen-guiding exosomes inhibit food allergies by inducing regulatory T cells. Immunol Cell Biol 2020; 98:639-649. [PMID: 32378751 DOI: 10.1111/imcb.12347] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 05/04/2020] [Accepted: 05/04/2020] [Indexed: 12/26/2022]
Abstract
The therapies for food allergy (FA) need to be improved. The generation of inducible regulatory T cells (Tregs) can support immune tolerance in the body. This study aims to suppress experimental FA by inducing Tregs through the employment of modified exosomes (mExosomes). In this study, mExosomes were prepared by incubating dendritic cells with interleukin (IL)-2 and ovalbumin (OVA, used as a specific antigen) in the culture. Exosomes were purified from culture supernatant and used as the mExosomes. A murine FA model was developed to test the effects of mExosomes on the generation of Tregs in the mouse intestinal tissues and inhibiting FA. The results showed that mExosomes, which carried IL-2 and a complex of OVA peptide-major histocompatibility complex class II on the surface of exosomes, bound to OVA-specific CD4+ T cells and induced CD4+ T cells to differentiate into Tregs. In the FA mouse intestinal tissues, we found low IL-2 levels that were positively correlated with the number of Tregs. Depletion of IL-2 in mice prevented the generation of Tregs. The levels of peroxisome proliferator-activated receptor-γ were increased in the FA intestinal tissues with inhibited IL-2 production. Administration of mExosomes induced Tregs in the intestinal tissues and efficiently suppressed FA in mice. We conclude that the mExosomes can suppress FA in mice through inducing Tregs. The data suggest that the mExosomes have translational potential in the treatment of FA and other allergic disorders.
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Affiliation(s)
- Dian Yu
- Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China
| | - Jiang-Qi Liu
- Department of Allergy, Longgang ENT Hospital & Shenzhen Key Laboratory of ENT, Institute of ENT, Shenzhen, China
| | - Li-Hua Mo
- Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China.,Department of Pediatric Otolaryngology, Shenzhen Hospital, Southern Medical University, Shenzhen, China
| | - Xiang-Qian Luo
- Department of Pediatric Otolaryngology, Shenzhen Hospital, Southern Medical University, Shenzhen, China
| | - Zhi-Qiang Liu
- Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China.,Department of Allergy, Longgang ENT Hospital & Shenzhen Key Laboratory of ENT, Institute of ENT, Shenzhen, China
| | - Gao-Hui Wu
- Department of Respirology & Allergy, Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Li-Teng Yang
- Department of Respirology & Allergy, Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Da-Bo Liu
- Department of Pediatric Otolaryngology, Shenzhen Hospital, Southern Medical University, Shenzhen, China
| | - Shuai Wang
- Department of Allergy, Longgang ENT Hospital & Shenzhen Key Laboratory of ENT, Institute of ENT, Shenzhen, China
| | - Zhi-Gang Liu
- Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China
| | - Ping-Chang Yang
- Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China.,Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen, China
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Noe SN, Newton C, Widen R, Friedman H, Klein TW. Anti-CD40, anti-CD3, and IL-2 stimulation induce contrasting changes in CB1 mRNA expression in mouse splenocytes. J Neuroimmunol 2000; 110:161-7. [PMID: 11024546 DOI: 10.1016/s0165-5728(00)00349-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The expression and function of cannabinoid receptor 1 (CB1) in mouse immune cells is unclear. Here we show that splenic B cells express more CB1 mRNA than T cells. Furthermore, splenocytes stimulated with the T cell mitogens, PMA/Io and anti-CD3, showed a decrease in CB1 message while cultures stimulated with the B cell mitogen, anti-CD40 antibody, showed an increase in message. In addition, co-treatment with mitogens and IL-2 uniformly caused an increase in CB1 mRNA. It is suggested that signaling pathways activated by T cell mitogens lead to decreased CB1 gene activation while pathways activated by B cell mitogens and IL-2 lead to increased CB1.
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Affiliation(s)
- S N Noe
- Department of Medical Microbiology and Immunology, University of South Florida, College of Medicine, Tampa, FL 33612, USA
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Abstract
Src family protein tyrosine kinases are activated following engagement of many different classes of cellular receptors and participate in signaling pathways that control a diverse spectrum of receptor-induced biological activities. While several of these kinases have evolved to play distinct roles in specific receptor pathways, there is considerable redundancy in the functions of these kinases, both with respect to the receptor pathways that activate these kinases and the downstream effectors that mediate their biological activities. This chapter reviews the evidence implicating Src family kinases in specific receptor pathways and describes the mechanisms leading to their activation, the targets that interact with these kinases, and the biological events that they regulate.
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Affiliation(s)
- S M Thomas
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02115, USA.
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