PMID- 17984841 OWN - NLM STAT- MEDLINE DCOM- 20071130 LR - 20071106 IS - 0041-1337 (Print) IS - 0041-1337 (Linking) VI - 84 IP - 7 DP - 2007 Oct 15 TI - Blood levels of donor-specific human leukocyte antigen antibodies after renal transplantation: resolution of rejection in the presence of circulating donor-specific antibody. PG - 876-84 AB - BACKGROUND: Accommodation to antibody is an important mechanism in successful ABO-incompatible transplantation, but its importance in human leukocyte antigen (HLA) antibody-incompatible transplantation is less clear, as sensitive techniques facilitating daily measurement of donor-specific HLA antibodies (DSAs) have only recently been developed. METHODS: We report 24 patients who had HLA antibody-incompatible kidney transplantation (21 living donors, 3 deceased), 21 of whom had pretransplant plasmapheresis. Eight had positive complement-dependent cytotoxic (CDC) crossmatch (XM) pretransplant plasmapheresis, nine had positive flow cytometric (FC) XM, and seven had DSA detectable by microbead analysis only. After transplant, DSA levels were monitored closely with microbead assays. RESULTS: Rejection occurred in five of eight (62.5%) CDC-positive cases, in three of nine (33%) FC-positive cases, and in two of seven (29%) of microbead-only cases at a median of 6.5 days after transplantation. Resolution occurred at a median of 15 days after transplantation, in 8 of 10 cases when the microbead level of DSA had median fluorescence intensity (MFI) >2000 U, in 6 of 10 when the microbead MFI >4000 U. In 8 of 10 cases, the microbead MFI at the time of resolution was greater than at the onset. DSA did not always cause clinical rejection. In five cases with a posttransplant DSA peaking at MFI >2000 U on microbead assay, rejection did not occur. CONCLUSION: These data suggest that the dominant method of successful transplantation was function of the transplant in the presence of circulating DSA, and they also define the period during which this occurred. FAU - Higgins, Rob AU - Higgins R AD - Transplant Unit, University Hospitals Coventry and Warwickshire, Coventry, West Midlands, UK. Robert.Higgins@uhcw.nhs.uk FAU - Hathaway, Mark AU - Hathaway M FAU - Lowe, David AU - Lowe D FAU - Lam, For AU - Lam F FAU - Kashi, Habib AU - Kashi H FAU - Tan, Lam Chin AU - Tan LC FAU - Imray, Chris AU - Imray C FAU - Fletcher, Simon AU - Fletcher S FAU - Zehnder, Daniel AU - Zehnder D FAU - Chen, Klaus AU - Chen K FAU - Krishnan, Nithya AU - Krishnan N FAU - Hamer, Rizwan AU - Hamer R FAU - Briggs, David AU - Briggs D LA - eng PT - Journal Article PL - United States TA - Transplantation JT - Transplantation JID - 0132144 RN - 0 (Antibodies) RN - 0 (HLA Antigens) RN - 0 (Immunosuppressive Agents) RN - 0 (Polystyrenes) SB - IM MH - Adult MH - Aged MH - Antibodies/chemistry MH - Biopsy MH - Flow Cytometry MH - Graft Survival MH - HLA Antigens/chemistry/*immunology MH - *Histocompatibility Testing MH - Humans MH - Immunosuppressive Agents/therapeutic use MH - Kidney Transplantation/*immunology/methods MH - Living Donors MH - Middle Aged MH - Plasmapheresis MH - Polystyrenes/chemistry MH - Time Factors EDAT- 2007/11/07 09:00 MHDA- 2007/12/06 09:00 CRDT- 2007/11/07 09:00 PHST- 2007/11/07 09:00 [pubmed] PHST- 2007/12/06 09:00 [medline] PHST- 2007/11/07 09:00 [entrez] AID - 00007890-200710150-00012 [pii] AID - 10.1097/01.tp.0000284729.39137.6e [doi] PST - ppublish SO - Transplantation. 2007 Oct 15;84(7):876-84. doi: 10.1097/01.tp.0000284729.39137.6e.