Pregnancy-induced HLA antibodies respond more vigorously after renal transplantation than antibodies induced by prior transplantation
Lowe, David Daga, Sunil Hathaway, Mark Williams, C Kashi, Habib Tan, Lam Chin Fletcher, Simon Hart, Pat Briggs, David Higgins, Robert
Lowe, David
Daga, Sunil
Hathaway, Mark
Williams, C
Kashi, Habib
Tan, Lam Chin
Fletcher, Simon
Hart, Pat
Briggs, David
Higgins, Robert
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2015-06-24
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Abstract
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) (p<0.01). The difference was especially marked when the pre-treatment antibody level was low; with pre-treatment MFI <1000, peak level was >1000 in 19/26 (73%) of pregnancy stimulated specificities, compared with 9/29 (31%) for all others (p<0.001). 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.
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Hum Immunol . 2015 Aug;76(8):546-52
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Article