Screening for Anal Cancer in Men Who Have Sex With Men Using Pre-Exposure Prophylaxis

Официальное название

Screening for Anal Cancer in MSM Using PrEP

Обзор

This study aims to learn more about anal cancer risk in men who have sex with men (MSM) who are using Pre-Exposure Prophylaxis (PrEP) to prevent HIV. Specifically, we want to check how common High-Grade Squamous Intraepithelial Lesions (HSIL) are in this group, how well anal swabs can screen for these lesions, and how having HSIL affects their quality of life. We'll also test if DNA methylation testing can give us extra information about the lesions. The main questions the study aims to answer are: * How common are HSIL in MSM using PrEP? * How accurate are anal swabs for detecting HSIL in this group? * How does having HSIL affect the quality of life of MSM using PrEP? * Can DNA methylation testing help improve our understanding of HSIL in these individuals? Participants will: * Answer questions about their health and quality of life. * Have an anal smear collected for testing. * Undergo High-Resolution Anoscopy (HRA) to check for HSIL and get a biopsy if deemed necessary.

Подробное описание

This study aims to evaluate High-Grade Squamous Intraepithelial Lesions (HSIL) in men who have sex with men (MSM) using Pre-Exposure Prophylaxis (PrEP) for HIV prevention. MSM are at increased risk for developing anal cancer, and HSIL is a known precursor to this type of cancer. The study seeks to assess the prevalence of HSIL, the screening accuracy of anal swabs, and the impact of HSIL on quality of life for MSM using PrEP. Furthermore, the study will explore the use of DNA methylation testing as a potential tool for improving the detection and understanding of HSIL in this high-risk group.

This multicenter clinical trial will involve MSM using PrEP at several study sites to ensure a diverse and representative sample.

The study will focus on prevalence, screening accuracy, and quality of life impacts, and will incorporate DNA methylation testing to explore potential molecular markers for early detection and progression of HSIL.

The primary goal of the study is to improve the early detection of HSIL in MSM using PrEP. By evaluating screening methods and quality of life, this study aims to provide valuable data that could lead to more effective screening strategies and interventions for preventing anal cancer in this population. The use of DNA methylation testing will provide additional insights into the molecular biology of HSIL, potentially informing future screening protocols.

This study addresses a significant gap in current research regarding the prevention and early detection of anal cancer in MSM using PrEP and aims to contribute critical data to improve healthcare outcomes for this high-risk population.

Вмешательства

• Диагностический тест Anal smear
  The intervention in this study involves the anal smear collection using the FLOQSwab® (COPAN, pouch type 502CS01). The swab is inserted 3-5 cm into the anal canal, reaching the transitional zone, the pressed against the canal wall and withdrawn in a spiral motion over approximately 20 seconds. After collection, the swab is immediately placed into a ThinPrep vial containing 20 ml of PreservCyt® and rinsed vigorously. The procedure is performed by a physician or trained study team member and is d
• Поведенческое Self-administered questionnaire
  It includes questions related to: Socio-demographic characteristics Health-related issues Past HPV vaccination (indication? age at vaccination?) History of condylomata and/or other STIs Drug use, tobacco use, alcohol use Anal symptoms: discomfort, itch, pain, nodules, blood loss/discharge, constipation Sexual behavior Insertive/receptive intercourse, chemsex, number of sex partners (stable, occasional, anonymous), condom use.
• Поведенческое EQ-5D-5L questionnaire
  This questionnaire will be used after a negative HRA or during the communication of the results (per telephone) and during the treatment if indicated. This questionnaire assesses the impact of health conditions and treatments on person's quality of life. We will use an adapted version of the EQ-5D-5L. This modified version includes additional questions tailored to assess specific domains highlighted in the A-HRSI. The additional items cover: * Physical Symptoms: Question on anal symptoms such
• Диагностический тест High Resolution Anoscopy (HRA)
  HRA will be conducted using advanced tools, such as the Zeiss Extaro at UZ Brussel. HRA will be conducted at participating centers with expertise in the technique, including UZ Brussel, UZ Gent, UZ Leuven, UZ Antwerpen, CHU St Pierre, AZ Sint-Jan Brugge, and Citadelle Liège. However, all biopsy specimens will be sent to AML Lab for analysis and stored in the biobank (BB190002). In certain centers, HRA is performed using high-resolution scopes.

Первичные конечные точки

• Prevalence of anal high-risk HPV infection in MSM-PrEP in Belgium [Срок оценки: From screening to study completion for the patient (on average 8 months).]

Вторичные конечные точки (8)

• Prevalence of abnormal anal cytology in MSM using PrEP in Belgium [Срок оценки: From screening to study completion for the patient (on average 8 months).]
• Prevalence of abnormal histology, i.e. LSIL and HSIL in MSM using PrEP in Belgium [Срок оценки: From screening to study completion for the patient (on average 8 months).]
• Methylation on cytology (screening) samples and histology (HRA) samples [Срок оценки: From screening to study completion for the patient (on average 8 months).]
• Accuracy of anal HPV genotyping, anal cytology and methylation, together or as separate tests in the prediction of hHSIL [Срок оценки: From screening to study completion for the patient (on average 8 months).]
• Can we distinguish different profiles in hHSIL suggesting repression or progression? [Срок оценки: From screening to study completion for the patient (on average 8 months).]
• Can ASCL1/ZNF582 methylation test make accuracy of the less invasive anal swab testing better and/or be used to guide treatment decision making? [Срок оценки: From screening to study completion for the patient (on average 8 months).]
• Determine the incidence of HPV related lesions between demographics, lifestyle, HPV vaccination, sexual risk behavior, history of STI and HPV infection, cytology and histology. [Срок оценки: From screening to study completion for the patient (on average 8 months).]
• Impact of anal cancer screening in MSM using PrEP on quality of life [Срок оценки: From screening to study completion for the patient (on average 8 months).]

Критерии участия

Критерии включения

• HIV-uninfected MSM (men who have sex with men) aged 35 years or older.
• participants must have been using PrEP for at least 3 months.
• Dutch, English or French speaking and writing

Критерии исключения

• Any intervention in the (peri-)anal region within the past 3 months
• Enema usage within 2 h before sampling
• Currently undergoing peri-anal topical HPV-treatment
• HRA in the last year (anal swab or HRA prior to the last year is no exclusion)

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Нет

Дизайн исследования

Распределение

Не применимо

Модель

Одна группа

Маскирование

Открытое

Основная цель

Скрининг

Центры проведения

Бельгия · 8 центров

• AZ Sint Jan — Bruges
• CHU Saint-Pierre — Brussels
• Cliniques universitaires Saint-Luc - UCLouvain — Brussels
• UZ Brussel — Brussels
• UZ Gent — Ghent
• Jessaziekenhuis — Hasselt
• UZ Leuven — Leuven
• CHU Charleroi - Chimay — Lodelinsart

Идентификаторы

NCT: NCT07029152 · SCOPE

Первоисточники (государственные реестры)

• ClinicalTrials.gov (NIH, США)

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