Detection of High-Risk Human Papillomavirus in Cervix Sample in an 11.3-year Follow-Up after Vaccination against HPV 16/18

• Autor(a) principal: Teixeira,Cirbia Silva Campos
• Data de Publicação: 2017
• Outros Autores: Teixeira,Julio Cesar, Oliveira,Eliane Regina Zambelli Mesquita, Machado,Helymar Costa, Zeferino,Luiz Carlos
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista brasileira de ginecologia e obstetrícia (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-72032017000800408
• topic: human papillomavirus; cervix uteri; papillomavirus vaccines; human papillomavirus vaccine 16 and 18 L1 VLP; HPV DNA tests; polymerase chain reaction

Abstract Purpose the aim of this study was to evaluate the pattern of human papillomavirus (HPV) detection in an 11.3-year post-vaccination period in a cohort of adolescent and young women vaccinated or not against HPV 16/18. Methods a subset of 91 women from a single center participating in a randomized clinical trial (2001-2010, NCT00689741/00120848/00518336) with HPV 16/18 AS04- adjuvanted vaccine was evaluated. All women received three doses of the HPV vaccine (n = 48) or a placebo (n = 43), and cervical samples were collected at 6-month intervals. Only in this center, one additional evaluation was performed in 2012. Up to 1,492 cervical samples were tested for HPV-DNA and genotyped with polymerase chain reaction (PCR). The vaccine group characteristics were compared by Chi-square or Fisher exact or Mann-Whitney test. The high-risk (HR)-HPV 6-month-persistent infection rate was calculated. The cumulative infection by HPV group was evaluated by the Kaplan-Meier method and the log-rank test. Results the cumulative infection with any type of HPV in an 11.3-year period was 67% in the HPV vaccine group and 72% in the placebo group (p = 0.408). The longitudinal analysis showed an increase of 4% per year at risk for detection of HR-HPV (non-HPV 16/ 18) over time (p = 0.015), unrelated to vaccination. The cumulative infection with HPV 16/18 was 4% for the HPV vaccine group and 29% for the placebo group (p = 0.003). There were 43 episodes of HR-HPV 6-month persistent infection, unrelated to vaccination. Conclusions this study showed themaintenance of viral detection rate accumulating HR-HPV (non-HPV-16-18) positive tests during a long period post-vaccination, regardless of prior vaccination. This signalizes that the high number of HPV-positive testsmay be maintained after vaccination.