Corticosteroid-induced lymphopenia, immunosuppression, and body defense

Area of Science:

• Endocrinology
• Immunology
• Physiology

Background:

• Adrenal corticosteroids are elevated during stress.
• Elevated corticosteroids are associated with reduced immune competence against novel antigens.
• This presents a paradox with Cannon's "wisdom of the body" principle.

Purpose of the Study:

• To reconcile the paradox of high corticosteroid levels and reduced immune defense.
• To explore the potential role of corticosteroids in modulating immune responses during threats to body integrity.

Main Methods:

• Conceptual analysis of existing physiological and immunological principles.
• Review of the effects of corticosteroids on immune function.
• Consideration of Cannon's theory of homeostasis.

Main Results:

• Heightened corticosteroid levels correlate with diminished ability to respond to new microbial antigens.
• This immune suppression occurs despite a threat to the body's integrity.
• A hypothesis is proposed to explain this phenomenon.

Conclusions:

• Corticosteroid-mediated suppression of immune responses may serve to prevent autoimmune reactions.
• This mechanism could be crucial for maintaining homeostasis when self-antigens are exposed due to disease or trauma.
• The "wisdom of the body" may involve prioritizing self-tolerance over immediate defense in certain critical situations.