Anti-BK Virus Immune Response and Kidney Transplantation (BKv)
Role of Specific Immune Cellular Response in the Control of BK Virus Infection: Prospective Study, Monocentric and Longitudinal During the First Nine Months After a Kidney Transplantation
BK virus infections are very frequent during months following a kidney transplantation: a viral reactivation is observed for almost 50% of patients during first year. This reactivation leads to a viremia for 10 to 15% of patient during this same period. The most frequent complication is interstitial nephritis for 2 to 8% of patients (27 patients representing 2.7% during 6 years in Nantes).
An intensive et persisting viral replication, assessed by detection of high blood viral load, could evolved to a viral nephropathy which lead to a very pejorative functional issue for the graft.
Biological follow-up of these infections lay on the measures of viral load. Their positivity must alert the physician and lead him to modulate immunosuppressive treatment.
Actually, there is no real consensus about the modalities of pharmacological immunosuppression decrease (decrease dose or change of molecule).
Specific lymphocytic anti-BKv evaluated on several cohorts of patients permit to prove:
- weakness of immune cellular response for patient with high viremia
- increase of this response when viral load decrease These studies laid on detection of INFg synthesis by Elispot after stimulation with viral antigens and in vitro cellular expansion.
New prospective and longitudinal data comparing the immune cellular response (systematic and early) after graft between patients controlling or not BKv infection are necessary to improve the comprehension of illness natural history.
The investigators propose to enlarge the investigation of anti-BKv immune cellular response to other functions than IFNg synthesis in the aim of detecting the eventual role of polyfunctional lymphocytes for infection control. Furthermore, the investigators propose to identify better diagnostic and prognostic makers.
Visão geral do estudo
Tipo de estudo
Inscrição (Real)
Contactos e Locais
Locais de estudo
-
-
-
Nantes, França, 44000
- Nantes' Univeristy hospital
-
-
Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
Aceita Voluntários Saudáveis
Gêneros Elegíveis para o Estudo
Método de amostragem
População do estudo
Descrição
Inclusion Criteria:
- Kidney-transplanted patient, since less than 30 days
- Older than 18 years old
- Treatment with tacrolimus and mycophénolate mofetil
Exclusion Criteria:
- No informed consent
- Pregnant women
- Patient under legal guardianship
- Treated by ciclosporin or mTOR-inhibitor
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
Coortes e Intervenções
Grupo / Coorte |
Intervenção / Tratamento |
|---|---|
|
kidney-transplanted patients
|
blood sample at M1, M2, M3; M4; M5, M6, M7, M8 and M9 after kidney transplantation
|
O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Comparison of the level of response between patient with a "non-controlled infection" and patients for who the blood viral load is under 103 copBKv/ml.
Prazo: at 1month, 2months, 3months, 4, 5, 6, 7, 8 and 9 months after kidney transplantation
|
Analyse the role of T-lymphocytes response in the control of BKv infection
|
at 1month, 2months, 3months, 4, 5, 6, 7, 8 and 9 months after kidney transplantation
|
Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Analyse of the other causes that could influence the occurence of a viremia higher than 103 copBKv/ml
Prazo: at 1month, 2months, 3months, 4, 5, 6, 7, 8 and 9 months after kidney transplantation
|
Other causes for abnormal viremia
|
at 1month, 2months, 3months, 4, 5, 6, 7, 8 and 9 months after kidney transplantation
|
|
Measurement of histological consequences of a BKv non-controlled infection during the first year post-graft
Prazo: at 12 months after kidney transplantation
|
Determine the frequence of occurence of nephropathy due to BKv for the population with a non-controlled infection
|
at 12 months after kidney transplantation
|
|
Measurement of increase of immune response due to modifications of immunosuppressive treatment for patient with a non-controlled infection
Prazo: at 1, 3 et 6 months after modification of immunosuppressive treatment
|
Comparision between the level of immune response and the time when the first viremia is higher than 103 copBKv/ml and 1, 3 et 6 months after modification of immunosuppressive treatment.
|
at 1, 3 et 6 months after modification of immunosuppressive treatment
|
Colaboradores e Investigadores
Patrocinador
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Real)
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 (Real)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Outros números de identificação do estudo
- BRD/10/03-ZF
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 .