Michael J. Lacagnina, Kendal F. Willcox, Nabila Boukelmoune, Alexis Bavencoffe, Ishwarya Sankaranarayanan, Daniel T. Barratt, Younus A. Zuberi, Dorsa Dayani, Melissa V. Chavez, Jonathan T. Lu, Alex Bersellini Farinotti, Stephanie Shiers, Allison M. Barry, Juliet M. Mwirigi, Diana Tavares-Ferreira, Geoffrey A. Funk, Anna M. Cervantes, Camilla I. Svensson, Edgar T. Walters, Mark R. Hutchinson, Cobi J. Heijnen, Theodore J. Price, Nathan T. Fiore, Peter M. Grace
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引用次数: 0
Abstract
Neuroimmune interactions are essential for the development of neuropathic pain, yet the contributions of distinct immune cell populations have not been fully unraveled. Here, we demonstrate the critical role of B cells in promoting mechanical hypersensitivity (allodynia) after peripheral nerve injury in male and female mice. Depletion of B cells with a single injection of anti-CD20 monoclonal antibody at the time of injury prevented the development of allodynia. B cell–deficient (muMT) mice were similarly spared from allodynia. Nerve injury was associated with increased immunoglobulin G (IgG) accumulation in ipsilateral lumbar dorsal root ganglia (DRGs) and dorsal spinal cords. IgG was colocalized with sensory neurons and macrophages in DRGs and microglia in spinal cords. IgG also accumulated in DRG samples from human donors with chronic pain, colocalizing with a marker for macrophages and satellite glia. RNA sequencing revealed a B cell population in naive mouse and human DRGs. A B cell transcriptional signature was enriched in DRGs from human donors with neuropathic pain. Passive transfer of IgG from injured mice induced allodynia in injured muMT recipient mice. The pronociceptive effects of IgG are likely mediated through immune complexes interacting with Fc gamma receptors (FcγRs) expressed by sensory neurons, microglia, and macrophages, given that both mechanical allodynia and hyperexcitability of dissociated DRG neurons were abolished in nerve-injured FcγR-deficient mice. Consistently, the pronociceptive effects of IgG passive transfer were lost in FcγR-deficient mice. These data reveal that a B cell–IgG–FcγR axis is required for the development of neuropathic pain in mice.
期刊介绍:
Science Translational Medicine is an online journal that focuses on publishing research at the intersection of science, engineering, and medicine. The goal of the journal is to promote human health by providing a platform for researchers from various disciplines to communicate their latest advancements in biomedical, translational, and clinical research.
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