Disarming cellular alarm systems-manipulation of stress-induced NKG2D ligands by human herpesviruses

Dominik Schmiedel, Ofer Mandelboim*

*Corresponding author for this work

Research output: Contribution to journalShort surveypeer-review

29 Scopus citations

Abstract

The coevolution of viruses and their hosts led to the repeated emergence of cellular alert signals and viral strategies to counteract them. The herpesvirus family of viruses displays the most sophisticated repertoire of immune escape mechanisms enabling infected cells to evade immune recognition and thereby maintain infection. The herpesvirus family consists of nine viruses that are capable of infecting humans: herpes simplex virus 1 and 2 (HSV-1, HSV-2), varicella zoster virus (VZV), Epstein-Barr virus (EBV), human cytomegalovirus (HCMV), roseoloviruses (HHV-6A, HHV-6B, and HHV-7), and Kaposi's-sarcoma-associated herpesvirus (KSHV). Most of these viruses are highly prevalent and infect a vast majority of the human population worldwide. Notably, research over the past 15 years has revealed that cellular ligands for the activating receptor natural-killer group 2, member D (NKG2D)-which is primarily expressed on natural killer (NK) cells-are common targets suppressed during viral infection, i.e., their surface expression is reduced in virtually all lytic herpesvirus infections by diverse mechanisms. Here, we review the viral mechanisms by which all herpesviruses known to date to downmodulate the expression of the NKG2D ligands. Also, in light of recent findings, we speculate about the importance of the emergence of eight different NKG2D ligands in humans and further allelic diversification during host and virus coevolution.

Original languageAmerican English
Article number390
JournalFrontiers in Immunology
Volume8
Issue numberAPR
DOIs
StatePublished - 11 Apr 2017

Bibliographical note

Publisher Copyright:
© 2017 Schmiedel and Mandelboim.

Keywords

  • Coevolution
  • Host-pathogen interaction
  • Immune evasion
  • NKG2D ligands
  • NKG2D,herpesvirus
  • Stress-induced ligands

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