Can the prophylactic quadrivalent HPV vaccine be used as a therapeutic agent in women with CIN? A randomized trial

Author:

Karimi-Zarchi Mojgan,Allahqoli Leila,Nehmati Ameneh,Kashi Abolfazl Mehdizadeh,Taghipour-Zahir Shokouh,Alkatout IbrahimORCID

Abstract

Abstract Background Human papillomavirus (HPV) is one of the most significant risk factors for cervical cancer. The HPV vaccine has a very significant impact on the incidence of cervical cancer. The present study aimed to investigate the impact of prophylactic quadrivalent HPV vaccine in the treatment of women with cervical intraepithelial neoplasia (CIN 1–3). Methods This randomized controlled trial was conducted in the Shahid Sadoughi University of Medical Sciences (SSUMS), Yazd, Iran, from October 2011 to November 2015 in women with histologically confirmed residual/recurrent CIN 1 or high-grade CIN (CIN 2–3). Eligible women were assigned randomly to an intervention and a control group. Women in the intervention group were given HPV vaccinations while those in the control group were not. Participants were followed up for 24 months. Primary and secondary outcomes, and adverse effects of the treatment in the two groups were compared using Student’s t test, the chi-square test, or Fisher’s exact test. P values < 0.05 or less were considered statistically significant. Results Three-hundred and twelve women were randomized to the two groups; the data of 138 in the intervention group and 104 in the control group were analyzed. The mean age of the women was 32.59 ± 4.85 years. Differences in age, marital status, and grades of CIN weren’t significant between the two groups. At the end of the two-year follow-up period, the number of women with CIN 2–3 in the intervention and control groups was reduced by 75% (from 93 to 23) versus 40% (from 69 to 41). The efficacy of the HPV vaccine in women with CIN 1–3 was 58.7% (p = 0.018). No serious adverse effects related to the vaccines were reported. Conclusions The prophylactic quadrivalent HPV vaccine after treatment may have a therapeutic effect in women with residual/recurrent CIN 1 or high-grade CIN (CIN 2–3). Trial registration Iranian Registry of Clinical Trials, IRCT20190603043801N1. Registered 24 July 2019 – Retrospectively registered, http://www.irct.ir/user/trial/40017/view

Funder

Shahid Sadoughi University of Medical Sciences (SSUMS), Yazd, Iran

Publisher

Springer Science and Business Media LLC

Subject

Public Health, Environmental and Occupational Health

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