Pregnancy-induced HLA antibodies respond more vigorously after renal transplantation than antibodies induced by prior transplantation

Autor: Sunil Daga, Robert Higgins, Lam Chin Tan, Nithya Krishnan, Habib Kashi, Pat Hart, Connie White Williams, David Philip Lowe, Christopher H.E. Imray, Simon Fletcher, Daniel Zehnder, David Briggs, M. Hathaway, For T. Lam
Rok vydání: 2015
Předmět:
Zdroj: Human Immunology. 76:546-552
ISSN: 0198-8859
DOI: 10.1016/j.humimm.2015.06.013
Popis: Acute antibody mediated rejection after HLA-specific antibody incompatible renal transplantation is related to donor specific HLA antibody (DSA) levels. DSA levels may rise sharply after transplant, and aim of this study was to examine changes in DSA levels, particularly according to the primary sensitising event. Changes in 220 HLA specificities in 64 patients over the first 30days after transplantation were evaluated using microbead assays. The greatest increase from pre-treatment to peak DSA levels was seen in pregnancy-stimulated specificities, median (IQR) increase in MFI of 1981 (94-5870). The next highest increase was for those sensitised by transplant with repeat HLA epitope mismatch, at 546 (-308-2698) (p0.01). The difference was especially marked when the pre-treatment antibody level was low; with pre-treatment MFI1000, peak level was1000 in 19/26 (73%) of pregnancy stimulated specificities, compared with 9/29 (31%) for all others (p0.001). DSA production to specificities stimulated by previous pregnancy was marked, even from very low pre-transplant levels. By contrast, there was a lower rate of antibody resynthesis to specificities repeated from previous transplants, both at antigen and epitope levels.
Databáze: OpenAIRE
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