[Mechanisms underlying chronic fatigue, a symptom too often overlooked]

Area of Science:

• Immunology
• Pathophysiology
• Microbiology

Background:

• Acute fatigue and inflammation are beneficial, but chronic forms are detrimental.
• Chronic fatigue and chronic inflammation are frequently associated in various diseases.
• Understanding the immune underpinnings of chronic fatigue is crucial for disease management.

Purpose of the Study:

• To explore the links between chronic fatigue signs, symptoms, and associated diseases.
• To investigate immune phenomena that may trigger chronic inflammation.
• To discuss potential underlying mechanisms of chronic fatigue and inflammation.

Main Methods:

• Literature review focusing on immune system activation.
• Analysis of bystander activation, innate immune memory, and gut microbiota.
• Discussion of proposed mechanisms linking inflammation and fatigue.

Main Results:

• Identified several immune phenomena potentially involved in chronic inflammation.
• Highlighted the association between chronic fatigue and specific immune responses.
• Proposed a framework for understanding the complex relationship between inflammation and fatigue.

Conclusions:

• Immune system dysregulation plays a significant role in chronic fatigue.
• Further research is needed to elucidate the precise mechanisms.
• This review provides a foundation for future clinical investigations into chronic fatigue.