The performance of human papillomavirus biomarkers in predicting anal high-grade squamous intraepithelial lesions in gay and bisexual men.
AIDS. 2017 Mar 18;:
Authors: Jin F, Roberts JM, Grulich AE, Poynten IM, Machalek DA, Cornall A, Phillips S, Ekman D, Mcdonald RL, Hillman RJ, Templeton DJ, Farnsworth A, Garland SM, Fairley CK, Tabrizi SN, SPANC research team
BACKGROUND: We evaluate the performance of human papillomavirus (HPV) biomarkers in prediction of anal histological high-grade squamous intraepithelial lesions (HSIL) in gay and bisexual men (GBM) in Sydney, Australia.
DESIGN: Baseline analysis of a three-year cohort study METHODS:: The Study of the Prevention of Anal Cancer (SPANC) is natural history study of anal HPV infection in GBM aged ≥35 years. All participants completed cytological and histological assessments. Stored ThinPrep PreservCyt residuum were tested for HPV genotyping (Linear Array and Cobas 4800) and viral load, E6/E7 mRNA expression (NucliSENS easyQ HPV v1), and dual cytology staining of p16 /Ki 67 antibodies (CINtecPLUS). Performance of each biomarker was compared with liquid-based anal cytology. The hypothetical referral rates were defined as the proportion of men who had abnormal cytology or tested positive to each of the biomarkers.
RESULTS: The median age of the 617 participants was 49 years (range: 35-79), and 35.7% were HIV-positive. All biomarkers were strongly associated with the grade of HPV-associated anal lesions (p < 0.001 for all). High-risk HPV (HR-HPV) viral load with a 33% cut-off and HR-HPV E6/E7 mRNA had similar sensitivity to anal cytology (78.4% and 75.4% vs 83.2%, respectively), and improved specificity (68.0% and 69.4% vs 52.4%, respectively) and lower referral rates (47.0% and 45.0% vs 59.2%, respectively). Specificity was significantly higher in the HIV-negative for HR-HPV viral load (72.3% vs 58.2%, p = 0.005).
CONCLUSIONS: HR-HPV viral load and E6/E7 mRNA had similar sensitivity and higher specificity in predicting histological anal HSIL with lower referrals in GBM than anal cytology.
PMID: 28323757 [PubMed - as supplied by publisher]