Interferon response in Huh7 cells
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA649769 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR12350703.fastq.gz | Fastqsanger.gz | |||
| SRR12350704.fastq.gz | Fastqsanger.gz | |||
| SRR12350705.fastq.gz | Fastqsanger.gz | |||
| SRR12350706.fastq.gz | Fastqsanger.gz | |||
| SRR12350707.fastq.gz | Fastqsanger.gz |
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Project description:Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that causes Coronavirus disease 2019 (COVID-19) has caused a global health emergency. A key feature of COVID-19 is dysregulated Interferon-response. Type-I interferon (IFN-I) is one of the earliest antiviral innate immune responses following viral infection and plays a significant role in pathogenesis of SARS-CoV-2. In this study, using a proteomics-based approach, we identified that SARS-CoV-2 infection induces delayed and dysregulated IFN-I signaling in Huh7 cells. We demonstrate that SARS-CoV-2 is able to inhibit RIG-I mediated IFN- production. Our results also confirm the recent findings that IFN-I pretreatment is able to reduce susceptibility of Huh7 cells to SARS-CoV-2, but not post-treatment. Senescent Huh7 cells in spite of showing accentuated IFN-I response were more susceptible to SARS-CoV-2 infection and SARS-CoV-2 effectively inhibited IFIT1 in these cells. Proteomic comparison between SARS-CoV-2, SARS-CoV and MERS-CoV revealed a distinct differential regulatory signature of interferon-related proteins emphasizing that therapeutic strategies based on observations in SARS-CoV and MERS-CoV should be used with caution. Our findings provide a better understanding of SARS-CoV-2 regulation of cellular interferon response and a perspective on its use as a treatment. Characterization of the role of different interferon stimulated genes on the inhibition of SARS-CoV-2 pathogenesis may direct novel antiviral strategies.
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Project description:The RNA modification N6-methyladenosine (m6A) regulates gene expression through various transcript-specific effects. The overall goal of these experiments was to determine the effects of the m6A methyltransferase complex proteins METTL3 and METTL14 on the expression of interferon stimulated genes. First, we depleted METTL3 and METTL14 in Huh7 cells using siRNAs and treated with Mock or IFN-β to analyze the regulatory effects of METTL3/14 on interferon-stimulated genes' transcript abundance. We then used Ribo-seq following METTL3/14 siRNA depletion and IFN treatment to quantify its effect on the translation of ISGs and other genes. Overall, we found that METTL3/14 exerts transcript-specific regulatory effects on a subset of interferon-stimulated genes. Overall, METTL3/14 appeared to enhance the translation of a subset of interferon-stimulated genes. We characterized the molecular effects of METTL3/14 and m6A on certain ISGs and determined that m6A augments the antiviral effects of the interferon response.
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Project description:A powerful approach to study innate antiviral response is to compare the difference between wild type Huh7 cells, which do not support robust replication of hepatitis C virus (HCV)2, versus certain subclones of Huh7 cells that are permissive for HCV replication. We generated two permissive cell lines and two independent non-permissive subclone from Huh7 cells. We compared the global methylation pattern of these different cells and find that Huh7 cells exist as a heterogeneous population of cells with distinct patterns of gene methylation. Comparison of Huh7, HRP1, HRP4, Huh7-pNeo1 and Huh7-pNeo2 cells.
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Project description:The change of gene expression in Huh7 cells treated with IFN-λ4, IFN-λ1 and IFN-α was analyzed at 0h, 6h and 16h after different interferon treatments. Huh7 cells that had been treated with IFN-α (10 IU/ml), IFN-λ1 (20 ng/ml) and IFN-λ4 (20 ng/ml). Time points of 6 h and 16 h after stimulation were selected.
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