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SARS-CoV-2 气道感染导致仓鼠模型出现感觉异常。

SARS-CoV-2 airway infection results in the development of somatosensory abnormalities in a hamster model.

机构信息

Nash Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.

Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.

出版信息

Sci Signal. 2023 May 9;16(784):eade4984. doi: 10.1126/scisignal.ade4984.

Abstract

Although largely confined to the airways, SARS-CoV-2 infection has been associated with sensory abnormalities that manifest in both acute and chronic phenotypes. To gain insight on the molecular basis of these sensory abnormalities, we used the golden hamster model to characterize and compare the effects of infection with SARS-CoV-2 and influenza A virus (IAV) on the sensory nervous system. We detected SARS-CoV-2 transcripts but no infectious material in the cervical and thoracic spinal cord and dorsal root ganglia (DRGs) within the first 24 hours of intranasal virus infection. SARS-CoV-2-infected hamsters exhibited mechanical hypersensitivity that was milder but prolonged compared with that observed in IAV-infected hamsters. RNA sequencing analysis of thoracic DRGs 1 to 4 days after infection suggested perturbations in predominantly neuronal signaling in SARS-CoV-2-infected animals as opposed to type I interferon signaling in IAV-infected animals. Later, 31 days after infection, a neuropathic transcriptome emerged in thoracic DRGs from SARS-CoV-2-infected animals, which coincided with SARS-CoV-2-specific mechanical hypersensitivity. These data revealed potential targets for pain management, including the RNA binding protein ILF3, which was validated in murine pain models. This work elucidates transcriptomic signatures in the DRGs triggered by SARS-CoV-2 that may underlie both short- and long-term sensory abnormalities.

摘要

尽管 SARS-CoV-2 感染主要局限于气道,但已与急性和慢性表型中的感觉异常相关。为了深入了解这些感觉异常的分子基础,我们使用金黄地鼠模型来表征和比较 SARS-CoV-2 和甲型流感病毒(IAV)感染对感觉神经系统的影响。我们在鼻内病毒感染后的头 24 小时内在颈和胸脊髓以及背根神经节(DRG)中检测到 SARS-CoV-2 转录本,但未检测到感染性物质。与 IAV 感染的仓鼠相比,SARS-CoV-2 感染的仓鼠表现出机械性超敏反应,虽然较轻但持续时间更长。感染后 1 至 4 天,对胸 DRG 的 RNA 测序分析表明,SARS-CoV-2 感染的动物主要表现为神经元信号转导紊乱,而 IAV 感染的动物表现为 I 型干扰素信号转导紊乱。后来,在感染后 31 天,SARS-CoV-2 感染的动物的胸 DRG 中出现了一种神经病理性转录组,这与 SARS-CoV-2 特异性的机械性超敏反应相吻合。这些数据揭示了疼痛管理的潜在靶点,包括 RNA 结合蛋白 ILF3,该蛋白在鼠类疼痛模型中得到了验证。这项工作阐明了 SARS-CoV-2 触发的 DRG 中转录组特征,这些特征可能是短期和长期感觉异常的基础。

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