A clinical research consortium sponsored by NIAID and JDRF
Researchers, doctors and patients

Alloantibody and Flow Crossmatch Core

Principal Investigator:
Robert Bray, Emory University, Atlanta, GA

Abstract

This core provides state-of-the-art testing for HLA antibodies. Serum samples collected from patients are evaluated for the presence or absence of donor-specific HLA alloantibody, a risk factor for transplant recipients if present at the time of transplantation or if produced de novo following transplantation.

Testing is performed using HLA-specific microparticles (FlowPRATM) and analyzed by flow cytometry. For samples that test positive, HLA antibody specificity is assessed using additional antigen coated micro-particles and flow cytometry (flow-specific beads and single-antigen beads).

The core also provides donor-specific crossmatch testing with cryopreserved cells or testing against a panel of cryopreserved lymphocytes. Flow cytometric crossmatching is conducted using a standardized 3-color method utilizing donor mononuclear cells. 

The laboratory may also perform STAT testing for specific patients. In instances where patients may be experiencing a rejection episode, knowledge of the patient's donor-specific HLA antibody profile can aid in treatment.

Manuscripts

Barker JM, Yu L, Miao D, Barriga K, Erlich H, Norris JN et al. Prediction of autoantibody positivity and progression to type 1 diabetes: Diabetes Autoimmunity Study in the Young (DAISY). JCEM 89:3896-3902, 2004. [PubMed] [Reprint]