PMID- 32654189 OWN - NLM STAT- MEDLINE DCOM- 20210623 LR - 20220531 IS - 1399-0012 (Electronic) IS - 0902-0063 (Linking) VI - 34 IP - 10 DP - 2020 Oct TI - Targeting the NLRP3 inflammasome to reduce warm ischemic injury in donation after circulatory death heart. PG - e14044 LID - 10.1111/ctr.14044 [doi] AB - While the donation after circulatory death (DCD) heart transplantation is an emerging clinical practice, the primary source of donor hearts for transplantation remains donation after brain death (DBD) donors. DCD process induces formation of NOD-like receptor family pyrin domain containing-3 (NLRP3) inflammasome, a key mediator of inflammation-driven damage to heart. Inhibition of NLRP3 inflammasome formation could be protective to DCD hearts. Five groups (n = 8 each) of mice were studied-control beating heart donor (CBD) wild-type (WT), DCD WT, CBD NLRP3 knockout (KO), DCD NLRP3 KO, and DCD WT NLRP3 inhibitor group. Hearts were procured and reanimated on a Langendorff system to assess physiologic parameters and then for molecular assays. NLRP3 inhibitor (50 micromol/L) was administered to the DCD-NLRP3 inhibitor group at reanimation. Tissue NLRP3 levels were 80% higher in the DCD WT group compared with the CBD-WT group. Caspase-1 activity was significantly elevated in DCD WT but not in KO or NLRP3 inhibitor groups. The developed pressures and +/-dP/dt were significantly impaired in the DCD WT group compared with the CBD-WT group, P < .05, but were well preserved in DCD-NLRP3 inhibitor group. The DCD process activates the NLRP3 inflammasome, contributing to myocardial damage and dysfunction. NLRP3 inflammasome inhibition limits myocardial injury and preserves DCD heart function. CI - (c) 2020 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd. FAU - Quader, Mohammed AU - Quader M AUID- ORCID: 0000-0001-8290-043X AD - Division of Thoracic and Cardiovascular Surgery, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia, USA. FAU - Mezzaroma, Eleonora AU - Mezzaroma E AD - School of Pharmacy, Virginia Commonwealth University, Richmond, Virginia, USA. FAU - Kenning, Kristine AU - Kenning K AD - Division of Thoracic and Cardiovascular Surgery, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia, USA. FAU - Toldo, Stefano AU - Toldo S AUID- ORCID: 0000-0002-1588-4019 AD - Division of Cardiology, Pauley Heart Center, Virginia Commonwealth University, Richmond, Virginia, USA. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20200802 PL - Denmark TA - Clin Transplant JT - Clinical transplantation JID - 8710240 RN - 0 (Inflammasomes) RN - 0 (NLR Family, Pyrin Domain-Containing 3 Protein) RN - 0 (Nlrp3 protein, mouse) SB - IM MH - Animals MH - Death MH - *Heart Transplantation MH - Humans MH - Inflammasomes MH - Mice MH - NLR Family, Pyrin Domain-Containing 3 Protein/genetics MH - Tissue Donors MH - *Tissue and Organ Procurement OTO - NOTNLM OT - Interleukin OT - NLRP3 OT - donation after brain death donor OT - donation after circulatory death donor EDAT- 2020/07/13 06:00 MHDA- 2021/06/24 06:00 CRDT- 2020/07/13 06:00 PHST- 2020/02/11 00:00 [received] PHST- 2020/06/15 00:00 [revised] PHST- 2020/07/08 00:00 [accepted] PHST- 2020/07/13 06:00 [pubmed] PHST- 2021/06/24 06:00 [medline] PHST- 2020/07/13 06:00 [entrez] AID - 10.1111/ctr.14044 [doi] PST - ppublish SO - Clin Transplant. 2020 Oct;34(10):e14044. doi: 10.1111/ctr.14044. Epub 2020 Aug 2.