Assessment of Donor Derived Cell Free DNA and Utility in Lung Transplantation

Blood is collected from the patient, packaged, and shipped at ambient temperature to CareDx for testing. Donor-derived cell-free DNA is measured via targeted amplification and sequencing of a set of carefully selected and validated SNPs. The AlloSure bioinformatics software calculates the percent dd-cfDNA in the sample tested and applies the QC criteria. The AlloSure results will be compared to the episodes of acute rejection diagnosed by transbronchial biopsy and BOS/CLAD diagnosed by spirometry in the subjects medical records. Transbronchial biopsies and spirometry are standard of care for lung transplant recipients.