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Updated: Jun 24, 2025
A Modified Simple Method for Induction of Myocardial Infarction in Mice
Published on: December 3, 2021
Inhibition of Extracellular Signal-Regulated Kinase Activity Improves Cognitive Function in Mice Subjected to
Yibo Yin1, Xin Li2, Xiaoxua Zhang3
1Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, School of Medicine, No. 241 West Huaihai Rd., Shanghai, China.
Abstract:
Cognitive impairment is a commonly observed complication following myocardial infarction; however, the underlying mechanisms are still not well understood. The most recent research suggests that extracellular signal-regulated kinase (ERK) plays a critical role in the development and occurrence of cognitive dysfunction-related diseases. This study aims to explore whether the ERK inhibitor U0126 targets the ERK/Signal Transducer and Activator of Transcription 1 (STAT1) pathway to ameliorate cognitive impairment after myocardial infarction. To establish a mouse model of myocardial infarction, we utilized various techniques including Echocardiography, Hematoxylin-eosin (HE) staining, Elisa, Open field test, Elevated plus maze test, and Western blot analysis to assess mouse cardiac function, cognitive function, and signal transduction pathways. For further investigation into the mechanisms of cognitive function and signal transduction, we administered the ERK inhibitor U0126 via intraperitoneal injection. Reduced total distance and activity range were observed in mice subjected to myocardial infarction during the open field test, along with decreased exploration of the open arms in the elevated plus maze test. However, U0126 treatment exhibited a significant improvement in cognitive decline, indicating a protective effect through the inhibition of the ERK/STAT1 signaling pathway. Hence, this study highlights the involvement of the ERK/STAT1 pathway in regulating cognitive dysfunction following myocardial infarction and establishes U0126 as a promising therapeutic target.
Insights
Myocardial infarction can cause cognitive impairment, but the mechanisms are unclear. This study shows the ERK/STAT1 pathway inhibitor U0126 improves cognitive function after heart attack, suggesting a therapeutic target.
Area of Science:
- Cardiovascular Medicine
- Neuroscience
- Molecular Biology
Background:
- Cognitive impairment is a frequent complication after myocardial infarction (MI).
- The precise molecular mechanisms underlying post-MI cognitive dysfunction remain largely unknown.
- Extracellular signal-regulated kinase (ERK) signaling is implicated in cognitive disorders.
Purpose of the Study:
- To investigate the role of the ERK/Signal Transducer and Activator of Transcription 1 (STAT1) pathway in cognitive impairment following myocardial infarction.
- To evaluate the therapeutic potential of the ERK inhibitor U0126 in ameliorating post-MI cognitive deficits.
Main Methods:
- Established a mouse model of myocardial infarction.
- Assessed cardiac function using Echocardiography and Hematoxylin-eosin staining.
- Evaluated cognitive function via Open field and Elevated plus maze tests.
- Analyzed signaling pathways using Western blot and Elisa.
- Administered U0126 intraperitoneally to assess its effects.
Main Results:
- Myocardial infarction mice exhibited reduced activity and impaired spatial exploration.
- Treatment with U0126 significantly improved cognitive performance in MI mice.
- U0126 administration demonstrated a protective effect against cognitive decline post-MI.
- Evidence suggests U0126 inhibits the ERK/STAT1 signaling pathway.
Conclusions:
- The ERK/STAT1 signaling pathway is critically involved in cognitive dysfunction after myocardial infarction.
- Inhibition of the ERK/STAT1 pathway using U0126 offers a promising therapeutic strategy for post-MI cognitive impairment.
