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Ann Thorac Surg 1990;49:220-224
© 1990 The Society of Thoracic Surgeons

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Articles

HLA histocompatibility affects cardiac transplant rejection and may provide one basis for organ allocation

Departments of Surgery and Medicine, Brigham and Women's Hospital, Boston, Massachusetts USA

^_* Address reprint requests to Dr DiSesa, Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115.

Prospective human lymphocyte antigen (HLA) typing is not performed for heart transplantation, and the relation between HLA matching and cardiac graft rejection is unclear. Recipient and donor HLA matching were analyzed retrospectively in 51 patients undergoing orthotopic cardiac transplantation. Immunosuppression was based on cyclosporine and prednisone. During the mean follow-up of 34 months (range, 16 to 63 months), the 46 operative survivors had an average of 3.95 rejection episodes (range, zero to 11 episodes). Twenty-one patients had steroid-resistant rejection requiring treatment with polyclonal or monoclonal antithymocyte globulin. Human lymphocyte antigen typing was available for 44 patients, and antigens were grouped in broad specificities. Patients with two or more HLA-A or HLA-B matches had a reduced number of rejection episodes ([equation] versus [equation]) and a lower incidence of steroid-resistant rejection ([equation] versus [equation]; p = 0.01). Inclusion of HLA-DR matches did not alter the findings. There was a strong correlation between the increased frequency of rejection and the incidence of steroid-resistant rejection (p < 0.0001). Four of six late deaths occurred in patients with steroid-resistant rejection; four were due to acute rejection and two to graft atherosclerosis. Although not currently done, prospective HLA matching is feasible with present typing methods. Our results suggest a rationale for prospective histocompatibility testing in cardiac transplantation with allocation of donor hearts to patients with two or more HLA matches.

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