- ICH GCP
- Registro de ensaios clínicos dos EUA
- Ensaio Clínico NCT01715103
Study of Immunity at the Genital Mucosa of HIV-1 Infected and Healthy Women (MUCOVAC)
Current knowledge on mucosa, especially genitals in women, however, remain inadequate, especially regarding defense mechanisms and possibilities for a vaccine to induce an active immune response at mucosal front door of the most pathogens. Induction of mucosal immune response has emerged as a research priority research prophylactic vaccine.The development of strategies to prevent sexual transmission of HIV-1 depends in part on an understanding of specific and innate immune mechanisms involved in this transmission.
MUCOVAC is a feasibility study of the immunological and transcriptomic analysis of cervicovaginal samples of women infected or not infected with HIV-1. We also assess tolerance samples taken by cytobrush and cervicovaginal washings, efficiency and reproducibility of the sample by cytobrush and cervicovaginal lavage for transcriptomic analysis, measurement of cytokines by Luminex technology, quantification of IgG and IgA. In blood we will determine the phenotype of B cells and Tfh cell frequency (T follicular helper) and quantification of serum immunoglobulins and will perform a transcriptomic analysis of blood cells. Finally we will make correlations with the observed responses at the genital mucosa.
This pathophysiological exploratory study will be performed in 20 women infected with HIV-1 and 20 healthy women recruited from two centers in France and will include a screening visit and two visits M0 and M1 during which mucous and blood samples will be performed.
The results of the study will capitalize skills in biology mucosa, using powerful tools to assess mucosal immunological parameters.
Visão geral do estudo
Status
Condições
Intervenção / Tratamento
Descrição detalhada
Eighty-five percent of new cases of HIV infection involve the South and the mode of transmission is predominantly heterosexual. In northern countries, sexual transmission is also majority. These epidemiological considerations clearly indicate that HIV is mainly transmitted mucosally.
Clinical observations show that some people are "resistant" to HIV, ie they do not become infected despite repeated sexual exposure to the virus. The "resistance" to HIV exposed but uninfected partners may be due to the absence of infection of target cells in the mucosa of the host, or to elimination of HIV or of infected cell during effective infection. Biological factors that govern individual resistance to HIV remain poorly understood. An immune response directed against cervicovaginal HIV antigens, including viral envelope glycoproteins has been described in a small number of HIV-negative women sexually exposed to the virus and resistant to infection. These observations demonstrate that there is a compartmentalization of the mucosal immune response of women, which can be induced against HIV antigens independently of systemic humoral immunity. In addition, a cytotoxic cervicovaginal immunity against HIV has been shown in some women, suggesting that viral antigens are presented to the immune system in a HLA-I, and therefore that HIV antigens were able to cross the mucosal barrier. A second hypothesis, which does not exclude the first, is that an immune response can be induced by repeated deposition of viral antigens on the cervicovaginal mucosa. It has been shown in HEPS women (Highly sexually exposed to HIV-1 persistently IgG seronegative purpose) the existence of IgA antibodies directed against gp41 can inhibit both the transcytosis of the virus through a monolayer epithelial cells and to neutralize the infection of CD4 T cells in vitro.
Soluble factors also play an important role in mucosal transmission of HIV. Indeed, lymphokines RANTES, MIP-1a and MIP-1b, SDF-1 natural ligands of HIV co-receptors are found in varying concentrations in vaginal secretions. More recently, it has been shown that the CCL20/MIP3alpha, which is produced by epithelial cells genital HIV could interact with X4-and R5-tropic to inhibit infection.
The most common techniques used to study the immunological and microbiological factors of female genital tract are cervicovaginal lavage (CVL) and swabbing the cervix. As part of a comprehensive approach to different aspects of mucosal immunity, it is necessary to use techniques for the acquisition of a large number of information while using small amounts of samples. Thus, techniques such as transcriptomic analysis on microarrays, which can tell us about changes in thousands of genes, and the use of techniques for multiplex quantification of soluble factors (cytokines and soluble factors of immunity innate mucosal) must be adapted, tested and validated before the start of a vaccine trial so that the samples needed for immunological assessment be exploited optimally.
A first phase I trial (ANRS VAC14) evaluating the safety and immunogenicity in mucosal and systemic recombinant gp160 protein oligomeric administered nasally or vaginally with or without adjuvant (DC-Chol), was performed in women seronegative for HIV. The goal was to induce secretory IgA (SIgA) level specific genital mucosa. In this study, the storage conditions of the supernatants of cervicovaginal secretions and cells were not optimal for a study of the transcriptome. However, on a few samples we have shown the feasibility of transcriptomic analysis using Illumina technology. We were able on these samples to determine the profiles of mRNA expression and cytokine profiles. These preliminary results led us to propose for the new study, to preserve RNA, cell pellets treated with buffer RLT+ Qiagen before freezing at -80 °C. In addition, protease inhibitors are added directly into the washing liquid to preserve cervicovaginal immunoglobulins and cytokines degradation.
We propose here a feasibility study of the immunological and transcriptomic analysis of cervicovaginal samples of women infected or not infected with HIV-1. Secondarily we assess tolerance samples taken by cytobrush and cervicovaginal washings, efficiency and reproducibility of the sample by cytobrush and cervicovaginal lavage for transcriptomic analysis, measurement of cytokines by Luminex technology, quantification of IgG and IgA. In blood we will determine the phenotype of B cells and Tfh cell frequency (T follicular helper) and quantification of serum immunoglobulins and will perform a transcriptomic analysis of blood cells. Finally we will make correlations with the observed responses at the genital mucosa.
This pathophysiological exploratory study will be performed in 20 women infected with HIV-1 and 20 healthy women recruited from two centers in France and will include a screening visit and two visits M0 and M1 during which mucous and blood samples will be performed.
The results of the study will capitalize skills in biology mucosa, using powerful tools to assess mucosal immunological parameters. These standardized tools can be used both for the evaluation of mucosal immune response induced by prototype vaccines, and cohort studies to search for correlates of protection. These tools can also be used in the evaluation of the local tolerance to the application of molecules with microbicides.
Tipo de estudo
Inscrição (Real)
Estágio
- Não aplicável
Contactos e Locais
Locais de estudo
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Paris, França, 75 679
- Centre d'investigation clinique Cochin Pasteur (CIC1417)
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Saint Etienne, França, 42055
- Service des Maladies Infectieuses et Tropicales
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
Aceita Voluntários Saudáveis
Gêneros Elegíveis para o Estudo
Descrição
Inclusion Criteria:
- Free, informed and signed consent
- Person affiliated or beneficiary of a social security system or the Universal Health Coverage
- Female
- No menopausal, aged 18 to 45 years,
- Under oral contraceptive or implant
- Urine pregnancy test negative
- HBsAg and HCV serology negative
- Cervicovaginal smear normal older than one year,
- Normal vaginal smear dated within one year
For healthy women
* HIV serology negative
For infected women
- HIV-1 infection checked by western-blot and/or the detection of HIV-RNA
- CD4+ T cells >350/mm3 (several tests, since 6 months)
- Viral load <40 copies/ml since 6 months
- Treated with antiretroviral drugs since 6 months
Exclusion Criteria:
- Significant history of vaginal pathology (malignancy, prolapse)
- Hysterectomy, conization
- History of abnormal Pap smear in the previous year (ASC-US, AG-US and LSIL and high grade according to Bethesda).
- Breakthrough bleeding;
- Clinical symptoms suggestive of genital infection within 10 days prior to the examination of the study,
- Antibiotic systemically within 10 days prior to the examination of the study,
- Immunosuppressive or immunomodulatory treatment in the last six months and corticosteroids (> 20 mg / day for 5 days) in last 3 months
- Presence of other sexually transmitted infection detected in samples at pre-inclusion visit and ongoing at V1 visit (Mycoplasma, Chlamydia, gonorrhea, Trichomonas, Candida albicans and Syphilis)
- A person participating in another research including a period of exclusion still ongoing selection
- Population called vulnerable (minors, persons under guardianship, or deprived of liberty by a judicial decision.
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Alocação: Não randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Nenhum (rótulo aberto)
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
---|---|
Outro: Healthy women volunteers
Healthy women volunteers with vaginal swabs by washing and cytobrush
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vaginal swabs by washing and cytobrush
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Outro: HIV-1 infected women
HIV-1 infected women with vaginal swabs by washing and cytobrush
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vaginal swabs by washing and cytobrush
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O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
---|---|---|
Acceptability, tolerance, Efficiency
Prazo: 2 months
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2 months
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Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
---|---|---|
Concentration of antibodies in cervicovaginal samples
Prazo: Month 0 and month 1
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Concentration of antibodies in cervicovaginal samples
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Month 0 and month 1
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Concentration of cytokines in cervicovaginal samples
Prazo: month 0 and month 1
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Concentration of cytokines in cervicovaginal samples
|
month 0 and month 1
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Expression genomics in cervicovaginal specimens and whole blood
Prazo: month 0 and month 1
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Expression genomics in cervicovaginal specimens and whole blood
|
month 0 and month 1
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B phenotypes and the frequency of Tfh cells in whole blood
Prazo: month 0 and month 1
|
B phenotypes and the frequency of Tfh cells in whole blood
|
month 0 and month 1
|
Colaboradores e Investigadores
Patrocinador
Investigadores
- Investigador principal: Fréderic LUCHT, PU PH, Service des Maladies Infectieuses et Tropicales,CIC-EC, CHU Saint Etienne
- Investigador principal: Odile LAUNAY, PU PH, Centre d'investigation clinique Cochin Pasteur (CIC 1417), hôpital Cochin Paris
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo
Conclusão Primária (Real)
Conclusão do estudo (Real)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Estimativa)
Atualizações de registro de estudo
Última Atualização Postada (Estimativa)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Outros números de identificação do estudo
- ANRS VEP1
- MUCOVAC (Identificador de registro: 2011-A01470-41)
Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .
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