Medical Microbiology and Immunology

, Volume 202, Issue 5, pp 353–363

Genomic differences in the background of different severity in juvenile-onset respiratory papillomatoses associated with human papillomavirus type 11

  • Tamás Gáll
  • Andrea Kis
  • Tímea Zsófia Tatár
  • Gábor Kardos
  • Lajos Gergely
  • Krisztina Szarka
Original Investigation

DOI: 10.1007/s00430-013-0297-y

Cite this article as:
Gáll, T., Kis, A., Tatár, T.Z. et al. Med Microbiol Immunol (2013) 202: 353. doi:10.1007/s00430-013-0297-y

Abstract

This study aimed to compare complete genome sequences of human papillomavirus (HPV) type 11 from two solitary papillomas (considered minimally aggressive), two moderately (six and nine episodes) and two highly aggressive (30 and 33 episodes) juvenile-onset respiratory papillomatoses. Genomic regions were sequenced using the Sanger method; sequences were compared to available GenBank genomes. Activity of the long control region (LCR) was assessed in HEp-2 cell line using luciferase assays and compared to that of the reference (GenBank Accession Number M14119). Site-directed mutagenesis was performed to confirm the association of polymorphisms with differences in LCR activity. Eleven alterations resulted in amino acid changes in different open reading frames. A72E in E1 and Q86K in E2 proteins were exclusively present in a moderately aggressive disease, L1 alterations A476V and S486F were unique to a severe papillomatosis. HPV11s in both solitary papillomas had identical LCRs containing a T7546C polymorphism, which strongly attenuated LCR activity, as confirmed by site-directed mutagenesis. This strong attenuator polymorphism was also present in the other four genomes showing significantly higher activities, but in these other alterations with demonstrable but statistically not significant attenuating (A7413C, 7509 T deletion) or enhancing (C7479T, T7904A) effect on transactivating potential (as demonstrated by site-directed mutagenesis) were also detected. LCR activities corresponded well to severity, excepting the highly aggressive papillomatosis with the L1 alterations. Presence of intratypic variants cannot explain differences in severity of respiratory papillomatoses associated with HPV11; virulence seems to be determined by the interaction of multiple genetic differences.

Keywords

HPV11Complete genome comparisonLCR activityClinical course

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Tamás Gáll
    • 1
  • Andrea Kis
    • 1
  • Tímea Zsófia Tatár
    • 1
  • Gábor Kardos
    • 1
  • Lajos Gergely
    • 1
  • Krisztina Szarka
    • 1
  1. 1.Department of Medical Microbiology, Medical and Health Science CentreUniversity of DebrecenDebrecenHungary