Impact of AV2 Antiviral Drug on the Treatment of HPV-associated Lesions of the Uterine Cervix
Impact of AV2 Antiviral Drug on the Treatment of HPV-associated Lesions of the Uterine Cervix
1. Introduction Cervical cancer (CC) is a major public health problem in Low-income
 countries (LICs), particularly in the Democratic Republic of the Congo (DRC), where the
 estimated number of cases is 3839 per year. (WHO, 2010).

 Persistent infection with Human Papillomavirus (HPV) is recognized as the necessary
 cause for the development of CC. Thus, CC is a disease that is easily preventable
 primarily by vaccination against HPV and secondarily through screening and treatment of
 precancerous lesions of the cervix.

 In LICs, the high incidence of CC is due to both high rates of infection with HPV, a
 failure to initiate and sustain effective screening programs based on cytology and the
 non-availability of vaccination against HPV. These situations highlight the need to
 implement simple and inexpensive screening and treatment methods suitable for LICs.
 These methods include screening by visual inspection of the cervix after application of
 acetic acid (VIA) and treatment with a topical antiviral drug (AV2).

 2. Aims

 This study aims to:

 -  Evaluate the clinical efficacy of AV2 as a treatment for HPV-associated lesions of
 the uterine cervix;

 -  Identify HPV genotypes found in Kinshasa;

 -  Determine the cost-effectiveness of an algorithm combining screening by VIA and AV2
 and that combining VIA and cryotherapy treatment;

 3. Methods After basic training of local health workers on VIA, on collection of cervical
 samples for HPV testing (quantitative Polymerase Chain reaction, qPCR) and liquid-based
 cytology (LBC) and on application of AV2, a screening and treatment program will be
 offered to women aged 25 and older who will give their informed consent.

 All women with lesions on VIA will be randomized into one of two groups to receive either
 treatment by AV2 or placebo.

 All women with lesions on VIA will be monitored and reviewed after two months and after six
 months for repeat tests (VIA and LBC for lesions, qPCR for viral load, conversion and
 reinfection rates).
CHAPTER 1: INTRODUCTION 1.1. BACKGROUND Cervical cancer (CC) is the third most common cancer
 in women, and the seventh overall, with an estimated 530 000 new cases per year. More than
 85% of the global burden occurs in low-income countries (LICs). It is responsible for 275 000
 deaths per year, about 88% of which occurring in LICs. Overall, the mortality: incidence
 ratio is 52. (Ferlay et al, 2010).

 The link between genital high-risk Human papillomavirus (HPV) infections and CC was first
 demonstrated in the early 1980s by Harold zur Hausen, a German virologist. (Gissmann, L et
 al, 1983) HPV infection may be transient or persistent. When it persists, HPV induces changes
 in cells of the cervix, precisely in the transformation zone. These changes constitute the
 precursor lesions of cervical cancer. These precursor lesions are either called precancerous
 lesions, dysplasia or cervical intraepithelial neoplasia (CIN). Left untreated, they can
 progress from mild (CIN1) to moderate (CIN 2) to severe (CIN 3) dysplasia, and then to
 cancer. It appears that dysplasia is asymptomatic and progresses to cancer over a prolonged
 period of time, usually 7 to 20 years.

 CC is then a potentially preventable and curable cancer. It can be prevented by vaccination
 against HPV and by screening. The latter involves the detection and treatment of precursors
 lesions on asymptomatic women.

 Several tests can be used for CC screening:

 -  Cytology (conventional or liquid-based) also called Pap test or Pap smear.

 -  Visual inspection of the cervix after application of 5% acetic acid or vinegar (VIA).

 -  HPV-DNA testing. In LIC, the method of screening with low-cost test such as VIA and
 treating women with positive result with such treatment as cryotherapy in one single
 visit is known as the "see-and-treat approach". This would minimize loss to follow up,
 delay in treatment and missed cases.

 1.2 ISSUES In HICs, cytology has been introduced as a screening test and reduced markedly the
 incidence of CC.

 In LICs such screening has not been feasible. The high incidence and high mortality for
 cervical cancer in LIC is due to both high rates of infection with high-risk HPV, a failure
 to initiate or sustain effective cervical cancer screening programs based on cytology and the
 non-availability of region-specific HPV vaccine programs.

 For that reason, VIA and HPV testing have been recommended for LICs. VIA involves the naked
 eye inspection of the uterine cervix after application of 3 to 5 % acetic acid. Its
 sensitivity and negative predictive value are very high, reaching 95% in most of the studies
 (Sarian, 2005; Sankaranarayanan, 2004).

 Only limited data are available on the prevalence and the distribution of HPV variants among
 women in the general population in DRC. Cytology has been proposed as a screening tool, but
 it's very opportunistic because there is no organized cervical cancer screening program based
 on it. On the other hand, most of the Congolese women, living on less than 1 dollar a day
 can't afford it. Vaccination against HPV infection has not been introduced yet in DRC. It
 holds promise for the prevention of cervical cancer, yet its impact will not be fully
 realized until many years after a vaccination program is instituted. To best understand the
 impact of large-scale vaccination programs, one must first appreciate baseline prevalence of
 HPV subtypes. Thus, secondary-level prevention i.e. screening is crucial.

 Cryotherapy has been proposed as the way to choose for treating cervical precancerous lesions
 in low-resource settings but it is hampered by major logistic problems (such as availability
 of carbon dioxide or nitrous oxide); Thus, VIA for screening combined with a simple single
 treatment with a vaginal spray of AV2 might offer logistical advantages.

 1.3 AIMS

 Overall Aim:

 To contribute to the amelioration of cervical cancer prevention in the Democratic Republic of
 Congo.

 Specific aims:

 1. To evaluate the clinical efficacy of the local AV2 antiviral drug in the treatment of
 HPV-associated cervical lesions.

 2. To determine the genotypes of HPV found in the Kinshasa region.

 3. To test the impact of HPV screening followed by virucide treatment in a see-and-treat
 setting on HPV infection and associated cervical lesions.

 4. to model the cost-effectiveness of:

 -  VIA screening test and virucide treatment algorithm

 -  VIA screening test and cryotherapy treatment algorithm 1.4 Hypothesis - The
 viricidal spray is more effective than placebo in the treatment of HPV-associated
 cervical precancerous lesions.

 CHAPITRE 2: MATERIALS AND METHODS 2.1. Study type and sites: randomized controlled clinical
 trial. Sites: Centre Hospitalier du Mont-Amba and Centre de santé Lisungi in Kinshasa, D.R.
 Congo.

 Laboratory testing will be performed in a laboratory based in Antwerp, Belgium. 2.2.
 Population:

 -  Women aged 25 and over: There is no upper limit in the study population as for the
 majority of women this will be the first screening contact for HPV and cervical cancer
 screening. Testing is not performed in women younger than 25 years old as it can be
 expected that the prevalence of HPV is very high at a younger age and most women will
 eliminate the virus after some years.

 -  Sample size and power calculations:

 The investigators would like to have enough power in both the HPV-positive group with and
 without lesions Assuming a HPV clearance rate of 50% in the non-interventional group and 70%
 in the virucide group at 2 months post-treatment, a minimum sample size of 163 patients
 (i.e., 124/site) is needed to show with 95% power and 95% certainty a difference between both
 groups. To allow for up to 10% drop-outs or unevaluable patients, the investigators will
 recruit at least 190 patients in each arm.

 It is supposed that 50 % of those HPV-positive will demonstrate some lesion on VIA,
 signifying that our secondary randomization on positive lesion will have approximately the
 same sample size.

 The investigators expect 20% of the women to be HPV positive, of whom 10% with and 10%
 without lesions, indicating that over 1900 ((190*2)/20%) women will have to be enrolled to
 obtain the required sample size.

 As the investigators can screen approximately 50 women per week of whom 70% will be willing
 and eligible to participate, we expect the study recruitment to last 30 weeks and the time
 between first recruitment and last patient visit to be 56 weeks.

 2.3 Study Design

 1. Basic training of doctors working in peripheral health centers where no formal
 laboratory facilities are available.

 Training will involve VIA and taking cervical swabs for HPV testing and for LBC, not
 needing any special technical skills; health workers can be trained for these within 1
 hour.

 2. A local screening program based on VIA will then be offered by these trained doctors to
 all women aged 25 and over; Samples for qPCR HPV DNA detection, viral load and
 genotyping and for LBC will also be collected at the same time just before the
 application of acetic acid. The results of these lab tests will not be available at the
 moment of randomization and will serve for later analysis.

 The results of the cervical cytology will be reported according to the 2001 Bethesda
 system terminology.

 3. Women showing lesions on VIA will be randomized to one of two groups to receive either
 AV2 virucide treatment or placebo.

 Women without lesion on VIA will not receive any treatment.

 4. All women with lesions will be followed-up and rechecked after two months with VIA, qPCR
 and LBC.

 5. In those testing positive with VIA at the control after 2 months, cryotherapy will be
 offered as per WHO criteria (Annex 4). It will be performed according to 2011 and 2012
 WHO Guidelines and Technical Specifications.

 6. In case cervical cancer is detected the patient will be treated according to the local
 protocol and resources.

 7. Six months after the first test, an evaluation including VIA, qPCR and LBC will be
 performed on all subjects who tested positive at the beginning.

 8. Those women with persistent precancerous lesions will be offered appropriate treatment.

 Those women without lesion at the beginning but whose HPV test or cytology results will be
 pathologic will be recalled for appropriate management.

 Further treatment will be as per local protocol as at this stage the study ends.

 2.4. Statistical analyses Data will be double-entered and cleaned in EpiInfo (version 6.04b,
 Centers for Diseases Control and Prevention).

 Proportions will be compared using the x2 or Fisher's exact tests (when required); Student's
 t test will be used for continuous variables. A paired t test will be used for within-patient
 comparisons.

 Non-normally distributed variables will be transformed, or nonparametric tests (Wilcoxon or
 Kruskal-Wallis) will be used.

 The log-rank test and the proportional hazard will be estimated (after the Schoenfeld test).

 In the case of a proportional hazard regression, all patients will be censored at the time of
 the last recorded visit.

 Stepwise multivariate analyses will be performed, and all possible interactions up to order 2
 will be tested.

 All reported P values will be 2-sided. For all statistical analyses a P value of ≤ 0.05 will
 be considered as statistically significant.

 All analyses will be performed using the STATA statistical analysis software package (at
 present version 12; Stata Corp.).

 2.5. Ethical issues Regulatory Authorities and Ethical Review Committee This protocol will be
 submitted for approval by the Institutional ethical committee or Institutional review board
 (IEC/IRB) of the University of Antwerp and of The Kinshasa School of Public Health and will
 be registered in an international randomized trial registry before starting.

 Patients can be enrolled only after formal approval from the EC
Inclusion Criteria:

 -  Sexually-active women

 -  Women with intact uterine cervix

 -  Voluntary written informed consent to participate in the study

 Exclusion Criteria:

 -  Virgin women

 -  Pregnant or breast-feeding women, and women in the post-partum period

 -  Subject is already diagnosed with cervical cancer

 -  Medical history of any severe diseases like hepatitis, renal or liver dysfunction,
 cardiovascular, gastrointestinal, malignant tumor, or psychiatric disorders etc.,
 which might influence the assessments or conduct of the trial by the discretion of the
 investigator

 -  Intake or application of antivirals or other prohibited concomitant medication within
 30 days prior to application of AV2®, or patients who plan to take such drugs during
 the trial

 -  Known or suspected allergic or adverse response to the investigational product AV2 or
 its components (olive oil or d-limonene)

 -  Inability to follow the study protocol