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Effect of SARS-CoV-2 infection on gene expression of iPSC derived sensory neurons [scRNAseq]

ABSTRACT: To investigate the impact of SARS-CoV-2 on the peripheral nervous system, we generated human sensory neurons from induced pluripotent stem cells (iPSC) that we further infected with the SARS-CoV-2 strain WA1/2020 for 48 hours.

ORGANISM(S): Homo sapiens

PROVIDER: GSE227529 | GEO | 2023/08/04

REPOSITORIES: GEO

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Effect of SARS-CoV-2 infection on gene expression of iPSC derived sensory neurons [bulkRNAseq]

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A Single Intranasal Vaccination with a Rationally Attenuated SARS-CoV-2 Elicits Strong Humoral Immune Response and Is Protective in Syrian Hamsters

Project description:Very few live attenuated severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines are currently in pre-clinical or clinical development. We rationally attenuated SARS-CoV-2 (isolate WA1/2020) by removing the polybasic cleavage site within the spike protein and the open reading frames (ORFs) 6-8, and by introducing a pair of mutations into the non-structural protein 1 (Nsp1). The derived virus (WA1-DPRRA-ORF6-8-Nsp1K164A/H165A) became severely attenuated in both the K18-human ACE2 (hACE2) transgenic mice and in Syrian hamsters. Transcriptomic profiling of nasal turbinates and lung tissues of infected Syrian hamsters confirmed that WA1-DPRRA-ORF6-8-Nsp1K164A/H165A attenuated the upregulation of proinflammatory pathways. A single intranasal immunization of just 100 PFU of the WA1-DPRRA-ORF6-8-Nsp1K164A/H165A elicited binding and neutralizing antibody responses in Syrian hamsters and completely protected against SARS-CoV-2-induced weight loss and pneumonia. These data demonstrate the feasibility of rational attenuation of SARS-CoV-2. WA1-DPRRA-ORF6-8-Nsp1K164A/H165A represents a promising live attenuated vaccine candidate.

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Project description:Despite being largely confined to the airways, SARS-CoV-2 infection has been associated with sensory abnormalities that manifest in both acute and long-lasting phenotypes. To gain insight on the molecular basis of these sensory abnormalities, we used the golden hamster infection model to characterize the effects of SARS-CoV-2 versus Influenza A virus (IAV) infection on the sensory nervous system. SARS-CoV-2-infected hamsters demonstrated mechanical hypersensitivity during acute infection; intriguingly, this hypersensitivity was milder, but prolonged when compared to IAV-infected hamsters. RNA sequencing (RNA-seq) of thoracic DRGs from acute infection revealed predominantly neuron-biased signaling perturbations in SARS-CoV-2-infected animals as opposed to type I interferon signaling in tissue derived from IAV-infected animals. RNA-seq of 31dpi thoracic DRGs from SARS-CoV-2-infected animals highlighted a uniquely neuropathic transcriptomic landscape, which was consistent with substantial SARS-CoV-2-specific mechanical hypersensitivity at 28dpi. Overall, this work elucidates novel transcriptomic signatures triggered by SARS-CoV-2 that may underlie both short- and long-term sensory abnormalities while also highlighting several therapeutic targets for alleviation of infection-induced hypersensitivity.

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SARS-CoV-2 stock sequencing for infection of nonhuman primates

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Gene expression of SARS-CoV-2-infected Vero E6 cells

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SHAE004: SARS-CoV, SARS-dORF6 and SARS-BatSRBD infection of HAE cultures.

Project description:HAE cultures were infected with SARS-CoV, SARS-dORF6 or SARS-BatSRBD and were directly compared to A/CA/04/2009 H1N1 influenza-infected cultures. Cell samples were collected at various hours post-infection for analysis. Time Points = 0, 12, 24, 36, 48, 60, 72, 84 and 96 hrs post-infection for SARS-CoV, SARS-dORF6 and SARS-BatSRBD. Time Points = 0, 6, 12, 18, 24, 36 and 48 hrs post-infection for H1N1. Done in triplicate for RNA Triplicates are defined as 3 different wells, plated at the same time and using the same cell stock for all replicates. Time matched mocks done in triplicate from same cell stock as rest of samples. Culture medium (the same as what the virus stock is in) will be used for the mock infections. Infection was done at an MOI of 2 for SARS viruses and an MOI of 1 for H1N1.

2013-07-31 | E-GEOD-47962 | biostudies-arrayexpress

Upper respiratory infection drives clinical signs and inflammatory responses in heterologous challenge of SARS-CoV-2 variants of concern

Project description:During the COVID-19 pandemic, three variants of concern (VOC) of the severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) emerged globally with increasingly greater ability to evade the immune response and enhanced transmissibility. A critical question we have faced with each new VOC is how well the vaccine based on the ancestral strain will protect. Given vaccine hesitancy, it is also important to address how prior live infections may protect against new variants. To address this later question, K18-hACE2 mice were infected with a low, partially lethal dose of WA1/2020 (WA1), the prototype strain on which the mRNA vaccines are based. On 24 days post-infection (dpi), surviving mice were challenged with WA1, Alpha or Delta. Nasal turbinates and lungs showed active replication on 1- and 3-days post-challenge (dpc) in Alpha- and Delta-, but not WA1- challenge groups. The rate of recovery of Alpha- and Delta-challenged mice lagged behind WA1 with mice showing weight loss despite a greatly dampened proinflammatory response in the lung. In contrast, nasal turbinates had a heightened proinflammatory response for Alpha- and Delta- but not WA1-challenged groups. Inflammatory responses were limited to the upper respiratory tract. Despite this, we did not observe significant difference among the groups in fold change in the neutralizing titer. In summary, infection with a low dose of SARS-CoV-2 confers protection from challenge, but mice in the heterologous challenge group differed in having greater weight loss, viral replication, and a heightened proinflammatory response in the upper respiratory tract.

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