Published: 26.09.2017 Last updated: 14.05.2018
Human papillomavirus (HPV) is the etiological agent of cervical cancer and other anogenital malignancies and cancer of the head/neck. Typically, HPV infections are transient and clear within relatively short time, typically 1-2 years. Persistent HPV infections, however, may last for years and can lead to the progressive transformation into cancer. Why typically benign infections develop into malign states remains unknown.
More than 200 HPV types are characterized. Of these, fourteen carcinogenic HPV types 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 66 and 68 are responsible for nearly all HPV-induced cancers.
High throughput HPV genotyping by NGS technology may increase sensitivity and specificity in both clinical end epidemiological contexts. We have developed a labour and cost effective genotyping protocol with improved analytical sensitivity and specificity. In addition to identifying carcinogenic and other HPV types, our protocol allows the characterization of nucleotide diversity in the target gene relevant for the study of pathogen evolution and vaccine escape.
HPV genotyping for cancer risk prediction is most often based on the gene encoding the viral capsid; the yardstick for HPV taxonomy. However, causal links between viral variants and cancer development are to be found elsewhere in the viral genome. We have therefore developed a HPV whole genome sequencing (HPV-WGS) approach for ultimate resolution in ongoing searches for associations between viral variants and cancer development.
This project aims to test the hypotheses that the level of sequence variation in HPV DNA from cervical cells can be used as a marker for cancer progression and that cancer risk can be stratified down to the level of genetic variants of HPV types.
Phd-candidate Sonja Lagström
Genotype diversity and HPV hypervariability in screening samples from Zimbabwe.
HPV16 genome dynamics in persistent infections.
Development of high-throughput HPV genotyping by next generation sequencing.
High-throughput whole genome sequencing of HPV.
Intra-host sequence variability in human papillomavirus
Papillomavirus Res (in press)
Dube Mandishora RS, Christiansen IK, Chin'ombe N, Duri K, Ngara B, Rounge TB, Meisal R, Ambur OH, Palefsky JM, Stray-Pedersen B, Chirenje ZM (2017) Genotypic diversity of anogenital human papillomavirus in women attending cervical cancer screening in Harare, Zimbabwe
J Med Virol, 89 (9), 1671-1677 PubMed 28390142
Meisal R, Rounge TB, Christiansen IK, Eieland AK, Worren MM, Molden TF, Kommedal Ø, Hovig E, Leegaard TM, Ambur OH (2017) HPV Genotyping of Modified General Primer-Amplicons Is More Analytically Sensitive and Specific by Sequencing than by Hybridization
PLoS One, 12 (1), e0169074 PubMed 28045981
Racheal Mandishora, University of Zimbabwe
Mari Nygård, CRN
Ameli Tropé, CRN
From left: Roger Meisal, Pascal van der Weele, Irene Kraus Christiansen, Audrey King, Ole Herman Ambur, Trine Rounge, Sonja Lagström, Racheal Mandishora