| First Author | Chong A | Year | 2000 |
| Journal | Transpl Immunol | Volume | 8 |
| Issue | 2 | Pages | 129-37 |
| PubMed ID | 11005319 | Mgi Jnum | J:64880 |
| Mgi Id | MGI:1890075 | Doi | 10.1016/s0966-3274(00)00017-4 |
| Citation | Chong A, et al. (2000) Anti-galactose-alpha(1,3) galactose antibody production in alpha1,3-galactosyltransferase gene knockout mice after xeno and allo transplantation. Transpl Immunol 8(2):129-37 |
| abstractText | Antibodies (Abs) that mediate the hyperacute rejection and acute vascular rejection/delayed xenograft rejection of pig organs in humans and Old World primates are predominantly directed at a single carbohydrate epitope, galactose-alpha1,3-galactose (alpha1,3Gal). The T-cell dependence of elicited anti-alpha1,3Gal Ab responses in humans and Old World primates is controversial. In this study we have characterized anti-alpha1,3Gal Ab production in mice with disrupted alpha1,3-galactosyltransferase genes (GT-Ko mice) and determined the T-cell dependence of anti-alpha1,3Gal Ab responses, following xenograft and allograft transplantation. GT-Ko mice produce natural anti-alpha1,3Gal IgM and IgG in an age-dependent manner, however, these Abs could not elicit hyperacute rejection nor affect the rate of cardiac xenograft (3-5 days) or allograft rejection (7-9 days). Transplantation of xenogeneic Lewis rats hearts elicited modest anti-alpha1,3Gal Ab, but vigorous xenoAb responses. The anti-alpha1,3Gal Ab response was restricted to the IgM and IgG3 subclass while the xenoAb response comprised IgM and all four IgG subclasses. Transplantation of allogeneic C3H hearts elicited weak anti-alpha1,3Gal Ab responses that were primarily IgM, but vigorous alloAb responses. Despite the restriction of elicited anti-alpha 1,3Gal Ab responses to the IgM and IgG3 isotypes, these responses are T-cell dependent. The ability of allografts to elicit weak anti-alpha1,3Gal but strong allo-Ab responses, can be explained by the dependence of alpha1,3Gal-specific B cells on cognate help from T cells. |
