B Cell Lymphocyte in Humoral Rejection and Alloimmunisation (BHL)
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
The principal objective is to better understand the B cell dependant mechanisms of the chronic antibody mediated rejection (cAMR). A particular focus will be done on the mechanisms that could explain the natural history of chronic humoral mediated rejection and of pathways from DSA negative status toward DSA positive status and from DSA positive status to histological lesions. The following will be undergone for three categories of patients (stable patients, DSA positive patients without cAMR and DSA positive patients with cAMR) :
- A phenotypic analysis of B cells of patients suffering from chronic humoral rejection or who are simply DSA positive.
- A functional analysis in autologous cultures in order to confirm our preliminary results.
- A functional analysis in a heterologous proliferation test aiming at a better understanding of the absence of B cell regulation of T cell proliferation in patients suffering from cAMR.
- A cytokine analysis (IL10, alpha-tumor necrosis factor, gamma-interferon dosing), for a better understanding of the mechanisms that are involved in the regulation of the T cell response that is induced by the B cells.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Forventet)
Tilmelding
Kontakter og lokationer
Studiesteder
-
-
-
Amiens, Frankrig, 80054
- Afsluttet
- CHU Amiens
-
Angers, Frankrig, 49933
- Afsluttet
- CHU Angers
-
Brest, Frankrig, 29200
- Rekruttering
- CHU Brest
-
Caen, Frankrig, 14033
- Afsluttet
- CHU Caen
-
Clermont Ferrand, Frankrig, 63003
- Afsluttet
- Chu Clermont Ferrand
-
Limoges, Frankrig, 87042
- Trukket tilbage
- CHU Limoges
-
Paris, Frankrig, 75743
- Afsluttet
- APHP Hôpital Necker
-
Poitiers, Frankrig, 86021
- Afsluttet
- CHU Poitiers
-
Reims, Frankrig, 51092
- Afsluttet
- Chu Reims
-
Rennes, Frankrig, 35033
- Afsluttet
- Chu Rennes
-
Rouen, Frankrig, 76230
- Afsluttet
- CHU Rouen
-
Strasbourg, Frankrig, 67091
- Afsluttet
- Hôpitaux Universitaires de Strasbourg
-
Tours, Frankrig, 37044
- Afsluttet
- CHU Tours
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Prøveudtagningsmetode
Studiebefolkning
Beskrivelse
Inclusion criteria :
Non stable patients :
- Patient older than 18 years old.
- Patient which is the recipient of a renal transplant
- Patient who develops anti donor antibodies after the transplantation and / or suffering from a histologically-proven antibody mediated rejection.
- Patient who has signed an informed consent form
Stable patients :
- Patient older than 18 years old.
- Patient that is the recipient of a renal transplant for more than one year
- Patient who has accepted to participate in the Brest Kidney graft recipient collection
- Patient that is not suffering from any rejection, that has a good renal function and a low proteinuria
- Patient that has not developed any DSA.
Exclusion criteria :
- Patients that has not signed the consent form.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Antal grupper/kohorter
Kohorter og interventioner
Gruppe / kohorteGruppe / kohorte |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
DSA positive patients without cAMR
Presence of DSA w/o cAMR
|
|
|
DSA positive patients with cAMR
Presence of DSA w/ cAMR
|
|
|
Stable patients
No DSA No cAMR
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Evaluation of the ratio (percentage and absolute values) of mature LB subpopulations (LBm1 to LBm5) and of memory LB by specific labellings
Tidsramme: At the inclusion day
|
At the inclusion day
|
|
|
Evaluation of the proliferation of freshly isolated cells T in presence of autologous B cells
Tidsramme: At the inclusion day
|
At the inclusion day
|
|
|
Evaluation of the proliferation of T cells in a heterologous test
Tidsramme: At the inclusion day
|
aiming at a better understanding of the absence of B cell regulation of T cell proliferation in patients suffering from cAMR
|
At the inclusion day
|
|
cytokine analysis(IL10, alpha-Tumor Necrosis FActor, gamma-Interferon dosing)
Tidsramme: At the inclusion day
|
for a better understanding of the mechanisms that are involved in the regulation of the T cell response that is induced by the B cells.
|
At the inclusion day
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Correlation between phenotypic and functional evaluations, and clinical outcome
Tidsramme: One year post inclusion
|
One year post inclusion
|
|
|
comparison of the B cell subpopulations before and after rituximab treatment
Tidsramme: One year post inclusion
|
In a subgroup of patients, the ones that will happen to be treated by rituximab for a rejection episode.
|
One year post inclusion
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Datoer for undersøgelser
Studer store datoer
Studiestart
Studiestart
Primær færdiggørelse (Forventet)
Primær færdiggørelse
Studieafslutning (Forventet)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- BHL (RB 12.047)
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