Targeting the Main Anatomopathological Features in Animal Models of Myocardial Infarction.

Area of Science:

• Cardiovascular Research
• Translational Medicine
• Animal Models

Background:

• Cardiovascular disease, particularly myocardial infarction (MI), is a major global cause of mortality and disability.
• Animal models are crucial for understanding MI pathophysiology and developing new therapies.
• Existing models replicate key post-MI phases: cell death, inflammation, repair, and remodeling.

Purpose of the Study:

• To review the anatomopathological features of small and large animal models of MI.
• To discuss species-specific histopathological similarities and differences in MI models.
• To evaluate the translational relevance of animal models for human MI research.

Main Methods:

• Review of existing literature on animal models of myocardial infarction.
• Comparative analysis of histopathological features across species (rodents, large mammals, humans).
• Assessment of temporal dynamics of post-MI phases in different models.

Main Results:

• Small and large animal models histopathologically reproduce the four main phases of post-MI.
• Significant differences exist in the timing and kinetics of cellular reactions between humans and animal models, and among animal models.
• Post-MI phases progress more rapidly in rodent models compared to large-animal models and humans.

Conclusions:

• Large-animal models of MI are more translationally relevant for studying human myocardial infarction due to closer resemblance in phase progression kinetics.
• Careful consideration of species-specific differences in phase onset and cellular kinetics is essential for experimental design in MI research.
• Understanding these nuances is critical for accurate data interpretation and the development of effective human therapies.