Abstract:
BACKGROUND:ABO-incompatible organ transplantation typically induces hyperacute rejection. A2-to-O liver transplantations have been successful. This study compared overall and graft survival in O recipients of A2 and O grafts based on Organ Procurement and Transplantation Network data. METHODS:Scientific Registry of Transplant Recipients data were used. The first A2-to-O liver transplantation was entered on March 11, 1990; all previous transplantations were excluded. Between March 11, 1990, and September 3, 2010, 43,335 O recipients underwent transplanation, of whom 358 received A2 grafts. RESULTS:There were no significant differences in age, sex, and race between the groups. Recipients of A2 grafts versus O grafts were significantly more likely to be hospitalized at transplantation (45% vs. 38%, P≤0.05) and to have a higher mean (SD) model for end-stage liver disease score (24 [11] vs. 22 [10], P≤0.05). 10% of A2 recipients and 9% of O recipients underwent retransplantation. No significant differences existed in rejection during the transplantation admission and at 12 months: 7% versus 6% and 20% versus 22% for A2 recipients and O recipients, respectively; and there were no significant differences in contributing factors to graft failure or cause of death. At 5 years, overall survival of A2 and O graft recipients was 77% and 74%, respectively (log rank=0.71). At 5 years, graft survival was 66% in both groups (log rank=0.52). Donor blood group was insignificant on Cox regression for overall and graft survival. CONCLUSIONS:Using Organ Procurement and Transplantation Network/Scientific Registry of Transplant Recipients data, we present the largest series of A2-to-O liver transplantations and conclude this mismatch option to be safe with similar overall and graft survival. This opens possibilities to further meet the demands of a shrinking organ supply, especially with regard to expanding living-donor options.
journal_name
Transplantationjournal_title
Transplantationauthors
Kluger MD,Guarrera JV,Olsen SK,Brown RS Jr,Emond JC,Cherqui Ddoi
10.1097/TP.0b013e31825c591esubject
Has Abstractpub_date
2012-09-15 00:00:00pages
526-31issue
5eissn
0041-1337issn
1534-6080journal_volume
94pub_type
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