Abstract:
:Plasmacytoid dendritic cells (pDCs) are the major producers of type I and type III interferons (IFNs) that play essential roles in host antiviral immunity. MicroRNAs (miRs) are small, noncoding RNAs that can modulate many immune processes. Although molecular regulation of type I IFN production by pDCs has been studied extensively, the regulation of type III IFN production has not been studied thoroughly, particularly at posttranscriptional level. We show here that miR-21 is an essential positive regulator for the production of both IFN-α and IFN-λ by pDCs and for promoting host defense against viral infection. miR-21 was markedly upregulated in toll-like receptor (TLR)-activated pDCs and was crucial for TLR7/9 ligand- or herpesvirus-induced production of IFN-α and IFN-λ by pDCs. miR-21-deficient pDCs produced significantly lower levels of IFN-α and IFN-λ on activation than those by wild-type pDCs. Impaired antiviral immune responses were also observed in miR-21-deficient mice. Mechanistically, we identified phosphatase and tensin homolog (PTEN) as the major target of miR-21 in pDCs, and miR-21 deficiency resulted in increased expression of PTEN that suppressed TLR-mediated activation of PI3K-Akt-mTOR signaling in pDCs. Hence, our findings provide evidence that miR-21 positively regulates both IFN-α and IFN-λ production and identify an important role for miR-21 in regulating the function of pDCs and in host antiviral immunity.
journal_name
Front Immunoljournal_title
Frontiers in immunologyauthors
Liu F,Liu C,Hu X,Shang Y,Wu Ldoi
10.3389/fimmu.2017.00947subject
Has Abstractpub_date
2017-08-21 00:00:00pages
947issn
1664-3224journal_volume
8pub_type
杂志文章abstract::Many current vaccines are less immunogenic and less effective in elderly compared to younger adults due to age-related changes of the immune system. Most vaccines utilized in the elderly contain antigens, which the target population has had previous contact with due to previous vaccination or infection. Therefore, mos...
journal_title:Frontiers in immunology
pub_type: 临床试验,杂志文章
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journal_title:Frontiers in immunology
pub_type: 杂志文章,评审
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pub_type: 杂志文章
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journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2017.01620
更新日期:2017-11-23 00:00:00
abstract::Objectives: Regulatory T cells (Tregs) are frequently functionally impaired in patients with granulomatosis with polyangiitis (GPA). However, the mechanism underlying their impaired function is unknown. Here, we hypothesized that Treg dysfunction in GPA is due to altered microRNA (miRNA) expression. Methods: RNA isola...
journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2019.02170
更新日期:2019-09-12 00:00:00
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pub_type: 杂志文章
doi:10.3389/fimmu.2018.02695
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abstract::Background: The systemic inflammatory cascade triggered in donors after brain death enhances the ischemia-reperfusion injury after organ transplantation. Intravenous steroids are routinely used in the intensive care units for the donor preconditioning. Immunosuppressive medications could be potentially used for this p...
journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2020.01222
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journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2013.00194
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journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2019.00280
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journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2018.03169
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journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2017.01166
更新日期:2017-09-26 00:00:00
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journal_title:Frontiers in immunology
pub_type: 杂志文章,评审
doi:10.3389/fimmu.2017.01496
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journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2018.02595
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journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2019.02244
更新日期:2019-09-26 00:00:00
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journal_title:Frontiers in immunology
pub_type: 杂志文章,评审
doi:10.3389/fimmu.2016.00166
更新日期:2016-05-02 00:00:00
abstract::Over the past two decades, heat shock proteins (HSPs) have been implicated in inflammatory responses and autoimmunity. HSPs were originally believed to maintain protein quality control in the cytosol. However, they also exist extracellularly and appear to act as inflammatory factors. Recently, a growing body of eviden...
journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2012.00048
更新日期:2012-03-15 00:00:00
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journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2020.00210
更新日期:2020-02-13 00:00:00
abstract::The influence of CD4(+)CD25(+)Foxp3(+) regulatory T-cells (Tregs) on cancer progression has been demonstrated in a large number of preclinical models and confirmed in several types of malignancies. Neoplastic processes trigger an increase of Treg numbers in draining lymph nodes, spleen, blood, and tumors, leading to t...
journal_title:Frontiers in immunology
pub_type: 杂志文章,评审
doi:10.3389/fimmu.2013.00292
更新日期:2013-09-26 00:00:00
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journal_title:Frontiers in immunology
pub_type: 杂志文章,评审
doi:10.3389/fimmu.2014.00452
更新日期:2014-09-24 00:00:00
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journal_title:Frontiers in immunology
pub_type: 杂志文章,评审
doi:10.3389/fimmu.2020.01672
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journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2012.00205
更新日期:2012-07-16 00:00:00
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pub_type: 杂志文章,评审
doi:10.3389/fimmu.2020.570681
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journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2019.02791
更新日期:2019-11-28 00:00:00
abstract::A key aspect to finding an efficacious human immunodeficiency virus (HIV) vaccine is the optimization of vaccine schedules that can mediate the efficient maturation of protective immune responses. In the present study, we investigated the effect of alternate booster regimens on the immune responses to a candidate HIV-...
journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2017.00595
更新日期:2017-05-24 00:00:00
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pub_type: 杂志文章,评审
doi:10.3389/fimmu.2020.591176
更新日期:2020-10-21 00:00:00
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journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2019.00032
更新日期:2019-01-31 00:00:00
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journal_title:Frontiers in immunology
pub_type: 杂志文章,评审
doi:10.3389/fimmu.2013.00393
更新日期:2013-11-21 00:00:00
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pub_type: 杂志文章,评审
doi:10.3389/fimmu.2019.01457
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journal_title:Frontiers in immunology
pub_type: 杂志文章
doi:10.3389/fimmu.2020.01822
更新日期:2020-08-25 00:00:00
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journal_title:Frontiers in immunology
pub_type: 杂志文章,评审
doi:10.3389/fimmu.2013.00272
更新日期:2013-09-11 00:00:00