JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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The effect of anti-human leukocyte antigen, anti-major histocompatibility complex class 1 chain-related antigen a, and anti-glutathione transferase-T1 antibodies on the long-term survival of renal allograft.

BACKGROUND: One of the most important mechanisms of allograft rejection is the production of donor-specific antibodies (DSA). Anti-major histocompatibility complex class-I chain-related antigen A (MICA) and anti-glutathione S transferase-T1 (GSTT1) antibodies cause graft dysfunction and reduce graft survival. The aim of this study was to examine the effects of anti-human leukocyte antigen class I-II, anti-MICA, and anti-GSTT1 antibodies in development of antibody-mediated rejection.

METHODS: Among the 32 renal transplant patients included in this study 65% experienced antibody-mediated rejection (AMR; chronic active AMR [CAMR], n = 17; acute AMR [AAMR], n = 4) and 35%, ACR. The anti-HLA class I-II and anti-MICA antibodies were determined by using LUMINEX, anti-GSTT1 antibodies by enzyme-linked immunosorbent assay. GSTT1 genotyping of patients and donors was performed by polymerase chain reaction.

RESULTS: Antibody was detected in 19 of 21 patients undergoing antibody-mediated rejection (90%). We detected anti-GSTT1 in 4, anti-MICA in 8, anti-HLA class I in 5, and anti-HLA class II in 9 patients with CAMR (P = .007). If the patients were divided into 2 groups according to being C4d(+) and C4d(-) both anti-HLA class I and class II antibodies were found significantly more frequently among the C4d(+) group (P = .019, P = .024). No difference was determined between AMR and ACR groups in terms of anti-GSTT1 and anti-MICA antibodies.

CONCLUSIONS: In this study, we observed the role of anti-HLA class II antibodies in the development of CAMR and in long-term allograft survival. It is observed that anti-MICA and anti-GSTT1 antibodies showed no effect on rejection mechanisms.

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