Possible chromosomal and germline integration of human herpesvirus 7

Bhupesh K. Prusty, Nitish Gulve, Santa Rasa, Modra Murovska, Pilar Collado Hernandez, Dharam V. Ablashi

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)
2 Downloads (Pure)


Human herpesvirus 7 (HHV-7) is a betaherpesvirus, and is phylogenetically related to both HHV-6A and HHV-6B. The presence of telomeric repeat sequences at both ends of its genome should make it equally likely to integrate into the human telomere as HHV-6. However, numerous studies have failed to detect germline integration of HHV-7, suggesting an important difference between the HHV-6A/-6B and HHV-7 genomes. In search of possible germline integrated HHV-7, we developed a sensitive and quantitative real-time PCR assay and discovered that primers designed against some parts of the HHV-7 genome can frequently miss HHV-7 positive clinical samples even though they work efficiently in cell-culture-derived HHV-7 positive materials. Using a primer pair against the U90 ORF of HHV-7, we identified a possible case of germline integration of HHV-7 with one copy of viral genome per cell in both peripheral blood cells and hair follicles. Chromosomal integration of HHV-7 in these individuals was confirmed by fluorescence in situ hybridization analysis. Germline integration of HHV-7 was further confirmed by detection of ~2.6 copies of HHV-7 in the hair follicles of one of the parents. Our results shed light on the complex nature of the HHV-7 genome in human-derived materials in comparison to cell-culture-derived materials and show the need for stringent criteria in the selection of primers for epidemiological HHV-7 studies.

Original languageEnglish
Pages (from-to)266-274
Number of pages9
JournalJournal of General Virology
Issue number2
Publication statusPublished - Feb 2017


  • Chromosomal integration
  • ciHHV-6
  • HHV-6
  • HHV-7

Field of Science*

  • 1.6 Biological sciences
  • 3.3 Health sciences

Publication Type*

  • 1.1. Scientific article indexed in Web of Science and/or Scopus database


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