PMID- 25095521 OWN - NLM STAT- MEDLINE DCOM- 20140909 LR - 20231213 IS - 0890-9016 (Print) IS - 0890-9016 (Linking) DP - 2013 TI - Anti-HLA-E monoclonal antibodies reacting with HLA-la and lb alleles like IVIg as potential IVIg-immunomimetics: an evolving therapeutic concept. PG - 293-305 AB - Healthy individuals have natural antibodies (Abs) reacting to allo-human leukocyte antigen (HLA)-la. This could be due to the presence of anti-HLA-E immunoglobulin G (IgG), which was revealed to recognize the peptides shared between HLA-E and HLA-la after peptide inhibition assay. Sera or plasma of multiple donors are pooled to prepare intravenous immune globulin (IVIg). The HLA-la-reactivity of IVIg is abolished when the anti-HLA-E Abs are depleted from the IVIg, suggesting that IVIg contains anti-HLA-E Abs with HLA-la reactivity. Anti-HLA-E monoclonal antibodies (mAbs; e.g., TFL-006 and TFL-007) generated at Terasaki Foundation Laboratory (TFL) differ from commercial HLA-E mAbs in mimicking HLA-la &-lb reactivities of IVIg, which is known to suppress the allo-HLA antibody (Ab) production and the activated CD4+ T cells. Whether HLA-E-mAbs also have the ability to suppress the production of these Abs and activation of T cells like IVIg is evaluated. Indeed, the TFL-mAbs significantly suppressed the allo-HLA-ll Ab production by B cells obtained from a woman alloimmunized postpartum >20 years ago. Similarly, the TFL-mAbs suppressed HLA-I Ab produced by a B-cell hybridoma. In both instances, the suppression was far superior to that by IVIg. Activated T cells were suppressed by both IVIg and the TFL-mAbs dosimetrically. Furthermore, the required concentrations of TFL-mAbs are 150-fold lower than the concentrations of IVIg required for the suppression. FAU - Ravindranath, Mepur H AU - Ravindranath MH FAU - Zhu, Dong AU - Zhu D FAU - Pham, Tho AU - Pham T FAU - Jucaud, Vadim AU - Jucaud V FAU - Hopfield, Judy AU - Hopfield J FAU - Kawakita, Satoru AU - Kawakita S FAU - Terasaki, Paul I AU - Terasaki PI LA - eng PT - Journal Article PT - Meta-Analysis PT - Review PL - United States TA - Clin Transpl JT - Clinical transplants JID - 8812419 RN - 0 (Antibodies, Monoclonal) RN - 0 (HLA Antigens) RN - 0 (Histocompatibility Antigens Class I) RN - 0 (Immunoglobulins, Intravenous) SB - IM MH - Antibodies, Monoclonal/*immunology/*therapeutic use MH - HLA Antigens/*immunology MH - Histocompatibility Antigens Class I/*immunology MH - Humans MH - Immunoglobulins, Intravenous/*immunology/therapeutic use MH - Transplantation Immunology/*immunology MH - HLA-E Antigens EDAT- 2013/01/01 00:00 MHDA- 2014/09/10 06:00 CRDT- 2014/08/07 06:00 PHST- 2014/08/07 06:00 [entrez] PHST- 2013/01/01 00:00 [pubmed] PHST- 2014/09/10 06:00 [medline] PST - ppublish SO - Clin Transpl. 2013:293-305.