Cell-based Assays for Antibody-mediated Transplant Rejection

NCT ID: NCT03916822

Last Updated: 2020-09-23

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

UNKNOWN

Total Enrollment

30 participants

Study Classification

OBSERVATIONAL

Study Start Date

2019-04-15

Study Completion Date

2021-08-14

Brief Summary

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Goal: The goal of this study is to validate blood tests, which can detect antibody-mediated rejection (ABMR) after renal transplantation. These cell based assays measure CD154-expressing alloantigen-specific B-cells and their subsets in peripheral blood of adult renal transplant recipients. Thirty recipients will be enrolled at two transplant centers, 10 each with ABMR, T-cell mediated rejection (TCMR), and no rejection. Each subject will be sample twice, before and after rejection. Donor-specific anti-HLA antibodies will also be measured with single antigen beads.

Detailed Description

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This cross-sectional open label study will evaluate whether alloantigen-specific B-cells and their subsets which express CD154 are associated with antibody-mediated rejection after first time renal transplantation in adult recipients.

Control groups include adult renal transplant recipients with T-cell-mediated rejection, and without rejection of any type.

Alloantigen-specific B-cells will be measured after stimulation of recipient peripheral blood leukocytes with those from corresponding donor and HLA-non-identical reference cells.

Thirty total subjects will be enrolled after IRB-approved informed consent, 15 at each of two sites. These subjects will include ten each with biopsy-proven ABMR and TCMR and ten with no rejection.

Each subject will be sampled twice, before and after treatment rejection, at intervals no less than 30 days, and not to exceed 90 days.

B-cells subsets will include those that also express cytokines, and those that are categorized as memory or naive, and their isotope switched or unswitched subsets, transitional B-cells or plasmablasts, etc.

Conditions

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Antibody-Mediated Graft Rejection

Study Design

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Observational Model Type

CASE_CONTROL

Study Time Perspective

PROSPECTIVE

Study Groups

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ABMR

Biopsy-proven ABMR-Banff criteria, with or without Complement binding donor-specific anti-HLA antibodies

Alloantigen-specific B-cells

Intervention Type DIAGNOSTIC_TEST

Alloantigen-specific B-cells which express CD154 and their subsets which also co-express cytokines, memory and naive markers, and additional derivatives of these markers will be measured with flow cytometry

TCMR

Biopsy-proven TCMR-Banff 1A, 1B, 2 and 3

Alloantigen-specific B-cells

Intervention Type DIAGNOSTIC_TEST

Alloantigen-specific B-cells which express CD154 and their subsets which also co-express cytokines, memory and naive markers, and additional derivatives of these markers will be measured with flow cytometry

No Rejection

Biopsy-proven, or clinical criteria

Alloantigen-specific B-cells

Intervention Type DIAGNOSTIC_TEST

Alloantigen-specific B-cells which express CD154 and their subsets which also co-express cytokines, memory and naive markers, and additional derivatives of these markers will be measured with flow cytometry

Interventions

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Alloantigen-specific B-cells

Alloantigen-specific B-cells which express CD154 and their subsets which also co-express cytokines, memory and naive markers, and additional derivatives of these markers will be measured with flow cytometry

Intervention Type DIAGNOSTIC_TEST

Eligibility Criteria

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Inclusion Criteria

* IRB-approved informed consent.
* Adults (\>18 yr to 70 years)
* Primary renal transplant recipients with biopsy-proven ABMR, TCMR or recipients with no rejection

Exclusion Criteria

* Lack of informed consent
* Concomitant BK virus infection
* Vulnerable populations including children \<18 yr, pregnant women, and prisoners
Minimum Eligible Age

18 Years

Maximum Eligible Age

70 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Medical University of South Carolina

OTHER

Sponsor Role collaborator

Plexision

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Rakesh Sindhi, MD

Role: STUDY_DIRECTOR

Plexision

Locations

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Erie County Medical Center

Buffalo, New York, United States

Site Status NOT_YET_RECRUITING

Medical University of South Carolina

Charleston, South Carolina, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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Rakesh Sindhi, MD

Role: CONTACT

412-224-2507

Ashok Reddy

Role: CONTACT

301-651-3367

Facility Contacts

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Liise Kayler, MD

Role: primary

716-361-8500

Rohan Vinayak

Role: primary

Other Identifiers

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00033434

Identifier Type: -

Identifier Source: org_study_id

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