Scientific article

Different responses of human anti-HLA and anti-alphagal antibody to long-term intravenous immunoglobulin therapy

Published inXenotransplantation, vol. 6, no. 3, p. 181-186
Publication date1999

Concentrated human immunoglobulin (IVIG) has been administered intravenously in the treatment of autoimmune disorders and to reduce anti-HLA antibodies in highly sensitized patients awaiting organ transplantation. It has also been shown, in experimental animals, to prevent the hyperacute rejection of discordant xenografts, possibly by anticomplement activity. The aim of the present study was to assess the effect of IVIG therapy on both acquired anti-HLA antibodies and natural antigalactose alpha1-3 galactose (alphaGal) antibodies in five patients awaiting heart transplantation. Five patients placed on mechanical circulatory support who had developed high HLA panel-reactive antibodies (PRA) or in whom the percentage of PRA was increasing rapidly were treated weekly with 500 mg/kg IVIG, which contained 1% of anti-alphaGal IgG. Levels of PRA, anti-alphaGal IgG and IgM, and serum cytotoxicity to pig cells were measured before, during, and after therapy. PRA percentages in the five patients were initially 85%, 53%, 23%, 19% and 19% (mean 39%). Mean PRA fell by 66% after 3 months of therapy (to a mean PRA of 14%), and by 96% after 6 months therapy (to a mean PRA of 2%). Anti-alphaGal antibody levels and serum cytotoxicity to pig aortic endothelial cells did not change significantly. These results confirm the effectiveness of IVIG therapy in reducing PRA in HLA highly sensitized patients. It is likely that IVIG does not contain the relevant anti-HLA antibody, resulting in an accelerated catabolism of native alloantibodies. However, as IVIG contains a normal level of anti-alphaGal IgG, catabolism of anti-alphaGal IgG is not modified, as it is being continuously replaced. To achieve a decrease in the anti-alphaGal IgG level it would be necessary to use IVIG depleted of this antibody.

  • Adult
  • Autoantibodies/blood/immunology
  • Disaccharides/immunology
  • Female
  • HLA Antigens/immunology
  • Heart Transplantation
  • Humans
  • Immunoglobulins, Intravenous/administration & dosage
  • Male
  • Middle Aged
  • Transplantation Immunology
Citation (ISO format)
BUEHLER, Leo Hans et al. Different responses of human anti-HLA and anti-alphagal antibody to long-term intravenous immunoglobulin therapy. In: Xenotransplantation, 1999, vol. 6, n° 3, p. 181–186. doi: 10.1034/j.1399-3089.1999.00026.x
Main files (1)
Article (Published version)
ISSN of the journal0908-665X

Technical informations

Creation04/30/2015 12:13:00 PM
First validation04/30/2015 12:13:00 PM
Update time03/14/2023 11:15:25 PM
Status update03/14/2023 11:15:24 PM
Last indexation01/16/2024 5:55:35 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack