Anti-BK Virus Immune Response and Kidney Transplantation

NCT ID: NCT01109186

Last Updated: 2021-09-17

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

158 participants

Study Classification

OBSERVATIONAL

Study Start Date

2010-11-30

Study Completion Date

2015-09-01

Brief Summary

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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.

Detailed Description

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Conditions

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Kidney Transplantation

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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kidney-transplanted patients

biological parameters

Intervention Type OTHER

blood sample at M1, M2, M3; M4; M5, M6, M7, M8 and M9 after kidney transplantation

Interventions

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biological parameters

blood sample at M1, M2, M3; M4; M5, M6, M7, M8 and M9 after kidney transplantation

Intervention Type OTHER

Eligibility Criteria

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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
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Nantes University Hospital

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Nantes' Univeristy hospital

Nantes, , France

Site Status

Countries

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France

Other Identifiers

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BRD/10/03-ZF

Identifier Type: -

Identifier Source: org_study_id

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