Genotypification and Predisposing Factors in Human Papilloma Virus Infection

Overview

Objective: Determine the genotypes and risk factors associated with human papilloma virus infection in Mexican women. Methods: It was a cross-sectional study of women attended at the Materno-Perinatal Hospital "Mónica Pretelini" and the Medical Research Center (CICMED), who were asked to complete a risk factor questionnaire and submitted to colposcopy to identify SIL. Cervical swab samples were obtained to perform linear array HPV genotyping test (Roche®, Mannheim, Germany).

Full Title of Study: “Genotypification and Predisposing Factors in Human Papilloma Virus Infection and Its Association With the Carbohydrate Antigen (CA-125) Tumoral Marker”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: N/A
    • Intervention Model: Single Group Assignment
    • Primary Purpose: Diagnostic
    • Masking: None (Open Label)
  • Study Primary Completion Date: May 2011

Detailed Description

Principles: The aim of this study was to determine the HPV genotypes in squamous intraepithelial lesions (SIL) in a population sample of the State of Mexico. Patients: The inclusion criteria were women submitted to a colposcopy study at the Clinic 221 of the Mexican Social Security Institute (IMSS), Maternal-Perinatal Hospital "Monica Pretelini" (HMPMP), State of Mexico Health Institute (ISEM) and the Medical Research Center (CICMED), Autonomous University of State of México (UAEMex). Women with previous conization were not considered into the study and those whose clinical follow up was lost were excluded. Sociodemographic factors: Patients were given a questionnaire to measure the following potential risk factors: age, area of residence, education level, sexual partners, participation in anal sex, age at first intercourse, smoking, use of hormonal contraception, use of condoms, number of pregnancies and vaginal deliveries. Cervical samples: Samples were collected by cervical scraping and were preserved in ThinPrep® PreservCyt® Solution (HologicTM Marlborough, Massachusetts, USA). HPV genotyping: DNA extraction from the cervical swab samples was performed using the Amplicor kit (Roche®, Mannheim, Germany), isolating simultaneously the β-globin gene along with HPV. HPV positive specimens were subsequently genotyped using the Linear Array HPV Genotyping assay (Roche®, Mannheim, Germany). This test is a qualitative in vitro test for the detection of HPV utilizing amplification of target DNA by the Polymerase Chain Reaction (PCR) and nucleic acid hybridization able to detect 37 anogenital HPV DNA genotypes (6, 11, 16, 18, 26, 31, 33, 35, 39, 40, 42, 45, 51, 52, 53, 54, 55, 56, 58, 59, 61, 62, 64, 66, 67, 68, 69, 70, 71, 72, 73 (MM9), 81, 82 (MM4), 83 (MM7), 84 (MM8), IS39 and CP6108). This technique can detect multiple HPV genotypes in the same sample. Ethical concerns: We followed the Declaration of Helsinki and all patients were asked to sign the written informed consent. This study was accepted by the Research and Ethical Committee of the CICMED. Statistical analysis: First, descriptive analyzes were performed, secondly, Odds Ratios (OR) and their associated 95% confidence intervals (95% CI) were calculated as well as Chi-square tests and conditional regression model for SIL using the Statistical Package for the Social Sciences (SPSS) 17.0 software. Difference was considered significant at p ≤ 0.05.

Interventions

  • Other: Linear Array HPV Genotyping assay
    • All samples with the suspicion of squamous intraepithelial lesion were processed with the Linnear Array methodology to identify HPV genotypes

Arms, Groups and Cohorts

  • No Intervention: Linear Array HPV Genotyping assay
    • Women submitted to colposcopy with a suspicion of squamous intraepithelial lesion were programmed a clinical follow up to cervical swab in order to extract DNA and perform a Linear Array HPV Genotyping assay (Roche®, Mannheim, Germany).

Clinical Trial Outcome Measures

Primary Measures

  • Multiple HPV infection
    • Time Frame: At the moment of the colposcopy
    • While women are revised by colposcopy the Gynecologist will refer them to a cervical swab for DNA extraction in case of suspicious of HPV infection.

Secondary Measures

  • squamous intraepithelial lesions
    • Time Frame: Within one week after the cervical sample taken by the technician
    • The pathologist will determine the presence or absence of SIL with the sample taken in the Papanicolaou smear appointment

Participating in This Clinical Trial

Inclusion Criteria

  • Sexually active women 18 to 40 years of age who come to consult the dysplasia clinic. – Who are not pregnant – Who have not received pharmacological treatment with antibiotics and / or anti-inflammatory drugs at least one month before the study. – Who agreed to participate in the study and signed the informed consent letter. – Acceptance to fill the questionnaire with relevant data related to HPV risk infection Exclusion Criteria:

  • Inadequate samples – Questionnaires with incomplete data – Women who decided to leave the study

Gender Eligibility: Female

Minimum Age: 15 Years

Maximum Age: 60 Years

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • Materno-Perinatal Hospital of the State of Mexico
  • Collaborator
    • Universidad Autonoma del Estado de Mexico
  • Provider of Information About this Clinical Study
    • Principal Investigator: Hugo Mendieta Zeron, Doctor – Materno-Perinatal Hospital of the State of Mexico
  • Overall Official(s)
    • Hugo Mendieta Zerón, PhD., Study Chair, Universidad Autónoma del Estado de México
    • María del Carmen Colín Ferreyra, MSc., Principal Investigator, Universidad Autónoma del Estado de México

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