The AlloSure test is approved by the Centers for Medicare \& Medicaid Services (CMS) for use in Medicare patients to assess the probability of allograft rejection in kidney transplant patients. The pivotal DART study discusses the use of the non-invasive AlloSure test to measure donor derived cell-free DNA (dd-cfDNA) and the Allosure test can by used to discriminate active rejection in renal transplant patients. Pancreas allograft rejection still remains a major clinical challenge and is a primary cause of death censored pancreas allograft loss. Pancreas transplant rejection is diagnosed by biopsy, however it is not commonly performed because of the complications such as pancreatic leak, graft loss and patient death. Currently at Rush surveillance biopsy of the pancreas are not performed routinely due to the above risks. At RUMC, patients are followed post-transplant with series of labs at set intervals that include lipase, DSA, C-Peptide, and GAD65 for surveillance of rejection The AlloSure test was introduced for routine use in kidney transplant recipients at Rush University Medical Center in October 2017, after CMS approval and then as part of the KOAR Study in May of 2018. AlloSure test has been included as part of the routine labs for surveillance of rejection in pancreas transplant recipients at RUMC since September 2018 after it was approved for compassionate use. The addition of AlloSure has helped to improve surveillance of rejection in pancreas transplant recipients and has reduced the need for the kidney biopsy as a surrogate marker of rejection in the pancreas. Our goal is to determine if AlloSure can be used for surveillance for rejection in recipients of Simultaneous Pancreas and Kidney (SPK) Transplant recipients.
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To determine median AlloSure level in SPK recipients with stable allograft function
Timeframe: Median allosure level collected from two weeks post transplant up until 36 months post transplant.