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Updated: Jun 22, 2026
A Murine Closed-chest Model of Myocardial Ischemia and Reperfusion
Published on: July 17, 2012
Preconditioning with high mobility group box 1 protein protects against myocardial ischemia-reperfusion injury
Insights
High mobility group box 1 protein (HMGB1) preconditioning significantly reduces myocardial ischemia-reperfusion (I/R) injury. This protective effect involves decreased infarct size and inflammatory markers, suggesting HMGB1 tolerance.
Area of Science:
- Cardiology
- Molecular Biology
- Immunology
Background:
- Myocardial ischemia-reperfusion (I/R) injury remains a significant clinical challenge.
- High mobility group box 1 protein (HMGB1) is implicated in inflammatory and injury responses.
Purpose of the Study:
- To determine if preconditioning with HMGB1 can mitigate myocardial I/R injury.
- To investigate the protective mechanisms of HMGB1 preconditioning.
Main Methods:
- Assessment of infarct size, lactate dehydrogenase (LDH), and creatine kinase (CK) levels.
- Measurement of inflammatory cytokines, including tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6).
Main Results:
- HMGB1 preconditioning significantly reduced infarct size in an I/R injury model.
- Levels of LDH, CK, TNF-α, and IL-6 were significantly decreased following HMGB1 preconditioning compared to the I/R group.
Conclusions:
- Preconditioning with HMGB1 confers protection against myocardial I/R injury.
- HMGB1 preconditioning may induce a state of HMGB1 tolerance, contributing to its cardioprotective effects.
Objective:
To investigate whether preconditioning with high mobility group box 1 protein (HMGB1) could reduce myocardial ischemia-reperfusion (I/R) injury.
Methods And Results:
Infarct size, lactate dehydrogenase (LDH), creatine kinase (CK), tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) were assessed. HMGB1 preconditioning reduced significantly the infarct size induced by I/R. The LDH, CK, TNF-α and IL-6 levels were significantly decreased by HMGB1 preconditioning compared to those in the I/R group.
Conclusion:
The present study suggested that preconditioning with HMGB1 could induce HMGB1 tolerance and protect against myocardial I/R injury.
