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Boštjan J. Kocjan

Novartis (Slovenia)

ORCID: 0000-0003-2084-0050

Publishes on Cervical Cancer and HPV Research, Molecular Biology Techniques and Applications, Head and Neck Cancer Studies. 89 papers and 2.4k citations.

89Publications
2.4kTotal Citations

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Top publicationsby citations

Which high-risk HPV assays fulfil criteria for use in primary cervical cancer screening?
Marc Arbyn, Peter J.F. Snijders, Chris J.L.M. Meijer et al.|Clinical Microbiology and Infection|2015
Cited by 279Open Access

Several countries are in the process of switching to high-risk human papillomavirus (hrHPV) testing for cervical cancer screening. Given the multitude of available tests, validated assays which assure high-quality screening need to be identified. A systematic review was conducted to answer the question which hrHPV tests fulfil the criteria defined by an international expert team in 2009, based on reproducibility and relative sensitivity and specificity compared to Hybrid Capture-2 or GP5+/6+ PCR-enzyme immunoassay. These latter two hrHPV DNA assays were validated in large randomized trials and cohorts with a follow-up duration of 8 years or more. Eligible studies citing the 2009 guideline were retrieved from Scopus (http://www.scopus.com) and from a meta-analysis assessing the relative accuracy of new hrHPV assays versus the standard comparator tests to detect high-grade cervical intraepithelial neoplasia or cancer in primary screening. The cobas 4800 HPV test and Abbott RealTime High Risk HPV test were consistently validated in two and three studies, respectively, whereas the PapilloCheck HPV-screening test, BD Onclarity HPV assay and the HPV-Risk assay were validated each in one study. Other tests which partially fulfil the 2009 guidelines are the following: Cervista HPV HR Test, GP5+/6+ PCR-LMNX, an in-house E6/E7 RT quantitative PCR and MALDI-TOF (matrix-assisted laser desorption-ionization time-of-flight). The APTIMA HPV assay targeting E6/E7 mRNA of hrHPV was also fully validated. However, the cross-sectional equivalency criteria of the 2009 guidelines were set up for HPV DNA assays. Demonstration of a low risk of CIN3+ after a negative APTIMA test over a longer period is awaited to inform us about its utility in cervical cancer screening at 5-year or longer intervals.

Commercially available assays for multiplex detection of alpha human papillomaviruses
Mario Poljak, Boštjan J. Kocjan|Expert Review of Anti-infective Therapy|2010
Cited by 122Open Access

Five main groups of commercial assays for the multiplex detection of alpha human papillomaviruses (HPVs) are currently available. DNA-based screening assays, which test for the presence of 13-14 HPVs without determination of HPV type, have been the standard for HPV detection in the last decade. Assays that combine testing for 14 HPVs and HPV-16 and HPV-18 genotyping are a potential future standard for HPV detection. The clinical value of HPV genotyping assays has still not been finally determined. Recently, one of the mRNA-based assays showed equal clinical sensitivity but higher clinical specificity for CIN2+/CIN3+ in comparison with the validated DNA-based assay. In situ hybridization assays are too laborious and have insufficient clinical sensitivity to be used in routine screening. Automation, price reduction and improvement of clinical specificity are the main goals for the future development of HPV assays.