Cf-DNA Assay During Treatment of Acute Rejection

"For all consenting recipients undergoing kidney biopsy between 1 and 12 months post-transplant, a single tube of blood will be drawn (at the time of other blood draws so that there is no additional needle stick) to measure cf-DNA. The tube will be shipped to the California lab for determination of donor cf-DNA. For recipients whose biopsy shows AR, a tube of blood will be drawn at 2, 4, 6, and 8 weeks after initiation of anti-rejection treatment and similarly will be shipped to the California lab for determination of cf-DNA.~Recipients whose exit biopsy shows ongoing inflammation and receiving additional anti-rejection therapy will have an additional exit biopsy additional cf-DNA determinations."