Detection of HLA-specific IgG antibodies using single recombinant HLA alleles - The monoLISA assay

被引:12
作者
Barnardo, MCNM [1 ]
Harmer, AW
Shaw, OJ
Ogg, GS
Bunce, M
Vaughan, RW
Morris, PJ
Welsh, KI
机构
[1] Churchill Hosp, Oxford Transplant Ctr, Oxford OX3 7LJ, England
[2] Nuffield Dept Surg, Oxford OX3 7LJ, England
[3] Guys Hosp, SE & SW Thames Reg Tissue Typing, London SE1 9RT, England
[4] Inst Mol Med, Oxford OX3 9DU, England
关键词
D O I
10.1097/00007890-200008150-00023
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Background. Because of the presence of confounding antigens, the assignment of HLA antibody specificity is difficult; in highly sensitized patients, and the definition of an acceptable HLA mismatch requires a significant workload per patient. We describe a new ELISA method, monoLISA, for detection of immunoglobulin (Ig)G HLA antibody using single recombinant HLA class I monomers bound to microtiter plates. Methods, HLA-A2 and -B8 monomers were synthesized and used as screening targets for 85 sera from renal patients. The sera contained various IgG and IgM HLA-specific antibodies, including anti-A2 and anti-B8,defined in a conventional complement-dependent cytotoxicity test (CDC). Investigations were performed to determine possible effects on antibody binding of differential monomer peptide presentation as well as lack of glycosylation, Results. A good correlation was found between CDC-defined specificities and the reactivity observed with HLA monomers, MonoLISA attained means of 100% sensitivity and 92.5% specificity compared with CDC, Neither the presence of different peptides, nor the absence of glycosylation of the monomer affected the ability of monoLISA to detect antibody. Conclusion. This study demonstrates that the monoLISA method for HLA antibody detection is valid. Because this has the potential to reduce the work involved in screening sensitized patients awaiting transplantation for HLA antibodies, resources aimed at increasing the number of constructed monomers would be well targeted.
引用
收藏
页码:531 / 536
页数:6
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