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Regulatory T Cells in Arterivirus and Coronavirus Infections: Do They Protect Against Disease or Enhance it?

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dc.creator Cecere, Thomas E.
dc.creator Todd, S. Michelle
dc.creator LeRoith, Tanya
dc.date 2017-01-10T21:28:56Z
dc.date 2017-01-10T21:28:56Z
dc.date 2012-05-01
dc.date.accessioned 2023-03-01T18:55:10Z
dc.date.available 2023-03-01T18:55:10Z
dc.identifier Cecere, T.E.; Todd, S.M.; LeRoith, T. Regulatory T Cells in Arterivirus and Coronavirus Infections: Do They Protect Against Disease or Enhance it? Viruses 2012, 4, 833-846.
dc.identifier 1999-4915
dc.identifier http://hdl.handle.net/10919/74224
dc.identifier https://doi.org/10.3390/v4050833
dc.identifier 4
dc.identifier 5
dc.identifier.uri http://localhost:8080/xmlui/handle/CUHPOERS/281911
dc.description Regulatory T cells (T<sub>regs</sub>) are a subset of T cells that are responsible for maintaining peripheral immune tolerance and homeostasis. The hallmark of T<sub>regs</sub> is the expression of the forkhead box P3 (FoxP3) transcription factor. Natural regulatory T cells (nT<sub>reg</sub>) are a distinct population of T cells that express CD4 and FoxP3. nT<sub>regs</sub> develop in the thymus and function in maintaining peripheral immune tolerance. Other CD4<sup>+</sup>, CD4<sup>-</sup>CD8<sup>-</sup>, and CD8<sup>+</sup>CD28<sup>-</sup> T cells can be induced to acquire regulatory function by antigenic stimulation, depending on the cytokine milieu. Inducible (or adaptive) T<sub>regs</sub> frequently express high levels of the interleukin 2 receptor (CD25). Atypical T<sub>regs</sub> express FoxP3 and CD4 but have no surface expression of CD25. Type 1 regulatory T cells (Tr1 cells) produce IL-10, while T helper 3 cells (Th3) produce TGF-β. The function of inducible T<sub>regs</sub> is presumably to maintain immune homeostasis, especially in the context of chronic inflammation or infection. Induction of T<sub>regs</sub> in coronaviral infections protects against the more severe forms of the disease attributable to the host response. However, arteriviruses have exploited these T cell subsets as a means to dampen the immune response allowing for viral persistence. T<sub>reg</sub> induction or activation in the pathogenesis of disease has been described in both porcine reproductive and respiratory syndrome virus, lactate dehydrogenase elevating virus, and mouse hepatitis virus. This review discusses the development and biology of regulatory T cells in the context of arteriviral and coronaviral infection.
dc.description Published version
dc.format 833 - 846 (14) page(s)
dc.format application/pdf
dc.format application/pdf
dc.language en
dc.publisher MDPI
dc.relation http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000305801700010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1
dc.rights Creative Commons Attribution 4.0 International
dc.rights http://creativecommons.org/licenses/by/4.0/
dc.subject Virology
dc.subject VIROLOGY
dc.subject regulatory T cell
dc.subject arterivirus
dc.subject porcine reproductive and respiratory syndrome virus
dc.subject lactate dehydrogenase-elevating virus
dc.subject coronavirus
dc.subject RESPIRATORY-SYNDROME-VIRUS
dc.subject DEHYDROGENASE-ELEVATING VIRUS
dc.subject CENTRAL-NERVOUS-SYSTEM
dc.subject INDUCED ACUTE ENCEPHALITIS
dc.subject ANTIGEN-PRESENTING CELLS
dc.subject IMMUNODEFICIENCY-VIRUS
dc.subject DELAYED-HYPERSENSITIVITY
dc.subject ACTIVATED MACROPHAGES
dc.subject INTRANASAL DELIVERY
dc.subject CYTOKINE PRODUCTION
dc.title Regulatory T Cells in Arterivirus and Coronavirus Infections: Do They Protect Against Disease or Enhance it?
dc.title Viruses
dc.type Article - Refereed
dc.type Review
dc.type Text


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