A spliced latency-associated VZV transcript maps antisense to the viral transactivator gene 61

Nat Commun. 2018 Mar 21;9(1):1167. doi: 10.1038/s41467-018-03569-2.

Abstract

Varicella-zoster virus (VZV), an alphaherpesvirus, establishes lifelong latent infection in the neurons of >90% humans worldwide, reactivating in one-third to cause shingles, debilitating pain and stroke. How VZV maintains latency remains unclear. Here, using ultra-deep virus-enriched RNA sequencing of latently infected human trigeminal ganglia (TG), we demonstrate the consistent expression of a spliced VZV mRNA, antisense to VZV open reading frame 61 (ORF61). The spliced VZV latency-associated transcript (VLT) is expressed in human TG neurons and encodes a protein with late kinetics in productively infected cells in vitro and in shingles skin lesions. Whereas multiple alternatively spliced VLT isoforms (VLTly) are expressed during lytic infection, a single unique VLT isoform, which specifically suppresses ORF61 gene expression in co-transfected cells, predominates in latently VZV-infected human TG. The discovery of VLT links VZV with the other better characterized human and animal neurotropic alphaherpesviruses and provides insights into VZV latency.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Chromosome Mapping
  • DNA, Viral / genetics
  • DNA, Viral / metabolism
  • Genome, Viral
  • Herpes Zoster / pathology
  • Herpes Zoster / virology*
  • Herpesvirus 3, Human / genetics*
  • Herpesvirus 3, Human / metabolism
  • Herpesvirus 3, Human / pathogenicity
  • High-Throughput Nucleotide Sequencing
  • Humans
  • Neurons / pathology
  • Neurons / virology
  • RNA Splicing
  • RNA, Antisense / genetics*
  • RNA, Antisense / metabolism
  • RNA, Messenger / genetics*
  • RNA, Messenger / metabolism
  • RNA, Viral / genetics*
  • RNA, Viral / metabolism
  • Skin / pathology
  • Skin / virology
  • Trigeminal Ganglion / pathology
  • Trigeminal Ganglion / virology
  • Viral Proteins / antagonists & inhibitors
  • Viral Proteins / genetics*
  • Viral Proteins / metabolism
  • Virus Latency*

Substances

  • DNA, Viral
  • RNA, Antisense
  • RNA, Messenger
  • RNA, Viral
  • Viral Proteins
  • protein 61, Varicella-zoster virus