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Article Abstract
Aims: Coronary artery disease (CAD) is a frequent comorbidity in lung transplant (LuTx) candidates. The impact of allogenic organ transplantation and the corresponding alterations in immune response on the progression of CAD remains poorly understood. In this study, we sought to analyze the effect of donor-recipient overall human leukocyte antigen (HLA) and HLA-DQ mismatch on cardiovascular outcomes following LuTx.
Methods And Results: This retrospective analysis of adult patients receiving lung transplantation at the LMU University Hospital between 2012 and 2018 included 310 patients, the majority of whom (67.4%) had undergone double lung transplantation. There were no significant differences in the incidence of the primary composite endpoint between patients with high/low HLA mismatches (22 [7.9%] vs. 4 [12.9%]; p = 0.311). Numerically higher rates of the primary endpoint, myocardial infarction, and cardiovascular death in the low HLA mismatch group can partially be explained by differences in baseline rates of CAD and coronary sclerosis. Notably, neither HLA-DQ mismatch nor the occurrence of rejection episodes or cytomegalovirus (CMV) infection was associated with the occurrence of cardiovascular events following transplantation.
Conclusion: In this study cohort, high HLA mismatch and HLA-DQ mismatch were not associated with increased adverse cardiovascular events. Furthermore, neither transplant rejection nor CMV infection increased the risk for cardiovascular events. The high cardiovascular event rates following LuTx necessitate meticulous cardiovascular follow-up, irrespective of immunological matching.
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