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Lack of antibody production against Hanganutziu‐Deicher (H‐D) antigens with N‐glycolylneuraminic acid in patients with porcine exposure history

Abstract: The significance of non‐αgalactosyl antigens remains unclear in pig‐to‐primate xenotransplantation. Hanganutziu‐Deicher (H‐D) antigens with terminal N‐glycolylneuraminic acid (NeuGc) are widely expressed on endothelial cells of mammalian species, with the exception of humans. As baboons and monkeys also express H‐D antigens, a pig‐to‐non‐human primate experimental model cannot resolve the question of whether H‐D antigens can elicit a potent humoral response in human recipients. The purpose of this study was to elucidate the clinical significance of H‐D antigens by examining the sera from patients who have been previously exposed to porcine tissue.