title: In vitro assessment of a new ABO immunosorbent with synthetic carbohydrates attached to sepharose.
abstract: Transplantation across the ABO barrier is sometimes done in cases of emergency, such as acute liver failure, but is also carried out in elective cases, e.g. kidneys from living donors. Reducing the recipient anti-A/B antibody titres is often necessary in ABO-incompatible kidney transplantation. This is usually done by the use of techniques such as plasmapheresis and protein A- or sepharose-linked anti-human Ig immunoadsorption. A new ABO immunosorbent with synthetic A- or B-trisaccharide carbohydrate epitopes linked to a sepharose matrix has been tested. Columns made of this material have been tested in vitro with plasma from A- and B-individuals, assessed for antibody reduction capacity, flow characteristics, biocompatibility, and unspecific protein adsorption. The columns have a high capacity for ABO antibody removal, reducing titres by three to seven steps in one passage. We noted a high biocompatibility, with no unspecific protein adsorption, no activation of coagulation factors, and a low activation of complement, no immune complex formation and no cytotoxicity towards cultured mammalian L929 cells.
authors.affiliation: Department of Clinical Chemistry and Transfusion Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden. lennart.rydberg@vgregion.se
authors.forename: Lennart
authors.initials: L
authors.lastname: Rydberg
authors.forename: Anders
authors.initials: A
authors.lastname: Bengtsson
authors.forename: Ola
authors.initials: O
authors.lastname: Samuelsson
authors.forename: Kurt
authors.initials: K
authors.lastname: Nilsson
authors.forename: Michael E
authors.initials: ME
authors.lastname: Breimer
mesh_terms: D000017:ABO Blood-Group System / Q000276:immunology*; D001672:Biocompatible Materials / Q000494:pharmacology; D001787:Blood Group Incompatibility / Q000276:immunology*; D006801:Humans; D007164:Immunosorbents / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use*; D007518:Isoantibodies
chemical_list: D000017:ABO Blood-Group System; D001672:Biocompatible Materials; D007164:Immunosorbents; D007518:Isoantibodies