https://www.selleckchem.com/products/ccs-1477-cbp-in-1-.html 1%). Adequate immunosuppression is an essential prerequisite for successful organ transplantation. In the immediate post-transplant period, significant immunosuppression is needed, but after that, the complications of excessive immunosuppression outweigh the risk of organ rejection. SORTs may present with a broad spectrum of inflammatory and cosmetic findings due to immunosuppressants that can impair life quality. Donor leukocytes are intrinsically involved in acute lung allograft rejection, via self-presentation of donor antigens to recipient leukocytes. Therapeutic modalities to remove donor leukocytes are currently unavailable. We evaluated if a vascular flush immediately following preservation can be used for this purpose. A post-preservation flush was performed with STEEN solution in n=6 porcine lungs following static cold storage. The first 500ml effluent from the left atrium was collected and an inflammatory profile performed. A total of 1.17 billion (±2.8×10 ) viable leukocytes were identified within the effluent. T cells were the dominant cell population, representing 82% of the total mobilised leukocytes, of which <0.01% were regulatory T cells. IL-18 was the most abundant cytokine, with a mean concentration of 84,216pg (±153,552pg). In addition, there was a mean concentration of 8819ng (±4415) cell-free mitochondrial DNA. There is an immediate transfer of donor leukocytes, cytokines and damage-associated molecular patterns following reperfusion. Such a pro-inflammatory donor load may enhance alloantigen presentation and drive recipient alloimmune responses. A post-preservation flush may therefore be an effective method for reducing the immune burden of the donor lung prior to transplantation. There is an immediate transfer of donor leukocytes, cytokines and damage-associated molecular patterns following reperfusion. Such a pro-inflammatory donor load may enhance alloantigen presentation and driv