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通过β2 肾上腺素能受体控制淋巴细胞从淋巴结中迁出。

Control of lymphocyte egress from lymph nodes through β2-adrenergic receptors.

机构信息

WPI Immunology Frontier Research Center, Osaka University, Osaka 565-0871, Japan.

Department of Molecular Pharmacology, Medical Research Institute, Global Center of Excellence Program, and Department of Maxillofacial Orthognathics, Tokyo Medical and Dental University, Tokyo 113-8510, Japan.

出版信息

J Exp Med. 2014 Dec 15;211(13):2583-98. doi: 10.1084/jem.20141132. Epub 2014 Nov 24.

Abstract

Lymphocyte recirculation through secondary lymphoid organs is essential for immunosurveillance and lymphocyte effector functions. Here, we show that signals through β2-adrenergic receptors (β2ARs) expressed on lymphocytes are involved in the control of lymphocyte dynamics by altering the responsiveness of chemoattractant receptors. Agonist stimulation of lymphocyte β2ARs inhibited egress of lymphocytes from lymph nodes (LNs) and rapidly produced lymphopenia in mice. Physiological inputs from adrenergic nerves contributed to retention of lymphocytes within LNs and homeostasis of their distribution among lymphoid tissues. β2ARs physically interacted with CCR7 and CXCR4, chemokine receptors promoting lymphocyte retention in LNs. Activation of β2ARs enhanced retention-promoting signals through CCR7 and CXCR4, and consequently inhibited lymphocyte egress from LNs. In models of T cell-mediated inflammatory diseases, β2AR-mediated signals inhibited LN egress of antigen-primed T cells and reduced their recruitment into peripheral tissues. Thus, this study reveals a novel mechanism for controlling lymphocyte trafficking and provides additional insights into immune regulation by the nervous system.

摘要

淋巴细胞在次级淋巴器官中的再循环对于免疫监视和淋巴细胞效应功能至关重要。在这里,我们表明,淋巴细胞上表达的β2-肾上腺素能受体(β2AR)的信号通过改变趋化因子受体的反应性来参与控制淋巴细胞动力学。淋巴细胞β2AR 的激动剂刺激抑制了淋巴细胞从淋巴结(LN)的迁出,并迅速在小鼠中产生淋巴细胞减少症。来自肾上腺素能神经的生理输入有助于 LN 内淋巴细胞的保留以及其在淋巴组织之间分布的稳态。β2AR 与促进 LN 中淋巴细胞保留的趋化因子受体 CCR7 和 CXCR4 发生物理相互作用。β2AR 的激活增强了通过 CCR7 和 CXCR4 的促进保留信号,从而抑制了淋巴细胞从 LN 中的迁出。在 T 细胞介导的炎症性疾病模型中,β2AR 介导的信号抑制了抗原致敏 T 细胞从 LN 中的迁出,并减少了它们向周围组织的募集。因此,这项研究揭示了控制淋巴细胞迁移的新机制,并为神经系统对免疫的调节提供了更多的见解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/94b5/4267238/499da241fe5c/JEM_20141132_Fig1.jpg

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