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Implantable bioelectronic systems for early detection of kidney transplant rejection.

Surabhi R MadhvapathyJiao-Jing WangHeling WangManish J PatelAnthony ChangXin ZhengYonggang HuangZheng Jenny ZhangLorenzo GallonJohn A Rogers
Published in: Science (New York, N.Y.) (2023)
Early-stage organ transplant rejection can be difficult to detect. Percutaneous biopsies occur infrequently and are risky, and measuring biomarker levels in blood can lead to false-negative and -positive outcomes. We developed an implantable bioelectronic system capable of continuous, real-time, long-term monitoring of the local temperature and thermal conductivity of a kidney for detecting inflammatory processes associated with graft rejection, as demonstrated in rat models. The system detects ultradian rhythms, disruption of the circadian cycle, and/or a rise in kidney temperature. These provide warning signs of acute kidney transplant rejection that precede changes in blood serum creatinine/urea nitrogen by 2 to 3 weeks and approximately 3 days for cases of discontinued and absent administration of immunosuppressive therapy, respectively.
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