Trained Innate Immunity Not Always Amicable.

Area of Science:

• Immunology
• Epigenetics
• Cellular Biology

Background:

• Trained innate immunity involves epigenetic reprogramming of immune cells.
• This phenomenon enhances responses to reinfection, offering broad protection.
• However, it can also drive chronic inflammatory conditions.

Purpose of the Study:

• To explore the dual role of trained immunity in health and disease.
• To review instances where trained immunity contributes to disease development.

Main Methods:

• Literature review of trained immunity research.
• Analysis of epigenetic mechanisms in innate immune memory.
• Case study examination of diseases linked to trained immunity.

Main Results:

• Trained immunity provides non-specific protection against pathogens.
• Epigenetic modifications alter gene expression and cell function.
• Enhanced innate immune responses are implicated in chronic metabolic, autoimmune, and neuroinflammatory disorders.

Conclusions:

• Trained immunity's beneficial effects are counterbalanced by its potential to promote chronic diseases.
• Understanding trained immunity is crucial for addressing diseases with aberrant innate immune responses.