Related Experiment Video
Updated: Jun 10, 2026
08:38
Murine Myocardial Infarction Model using Permanent Ligation of Left Anterior Descending Coronary Artery
Published on: August 16, 2019
Brain Death-Induced Systolic Ventricular Dysfunction and Its Association With NLRP3-Related Inflammatory Signaling in
Lei Huang1,2, Kevin P Zbierski3, Ye Yuan2
1Department of Neurosurgery, Loma Linda University Medical Center, Loma Linda, CA, USA.
Annals of Transplantation
|June 9, 2026
Summary
Brain death (BD) causes 100% left ventricular (LV) dysfunction within 60 minutes in mice. This cardiac dysfunction is linked to increased NLRP3 inflammasome signaling and pro-inflammatory cytokines in the heart.
Area of Science:
- Cardiology
- Immunology
- Transplantation Science
Background:
- Brain death (BD) significantly impacts donor heart quality, limiting organ utilization.
- Left ventricular (LV) dysfunction is a critical complication following BD.
- Understanding the mechanisms behind BD-induced cardiac dysfunction is crucial for improving transplant outcomes.
Purpose of the Study:
- To determine the incidence and temporal profile of BD-induced LV dysfunction in a murine model.
- To investigate the association between BD and NLRP3-related inflammatory signaling in the myocardium.
- To evaluate upstream regulators of NLRP3, including P2X7 and PPAR-γ.
Main Methods:
- Utilized a murine model of brain death (BD) with control groups.
- Performed serial echocardiography and hemodynamic measurements to assess LV function.
- Analyzed LV tissue for the expression of NLRP3, IL-1ß, TNF-alpha, IL-6, P2X7, and PPAR-γ.
Main Results:
- 100% of BD mice exhibited significantly reduced left ventricular ejection fraction (LVEF) by 60 minutes post-BD.
- BD led to significant decreases in LVEF, fractional shortening, and stroke volume.
- Increased expression of NLRP3, IL-1ß, TNF-alpha, and IL-6 was observed in the LV tissue of BD mice.
Conclusions:
- Brain death consistently induces significant left ventricular dysfunction in mice.
- NLRP3 inflammasome activation and associated pro-inflammatory cytokines play a role in BD-induced cardiac dysfunction.
- Targeting the NLRP3 inflammatory pathway may offer a therapeutic strategy to preserve myocardial function after brain death.
