Infection, immunity and the neuroendocrine response

Area of Science:

• Neuroimmunology
• Endocrinology
• Nutritional Immunology

Background:

• The central nervous system (CNS) and immune system (IS) form an integrated network essential for health.
• This neuro-immune network modulates responses to infection, linking innate and acquired immunity.
• Dysregulation of this network can lead to chronic inflammation, tissue damage, and impaired growth.

Purpose of the Study:

• To review key signaling pathways mediating bidirectional communication between the CNS and IS during infection.
• To highlight the role of specific mediators like cytokines, hormones (Glucocorticoids, Growth Hormone, IGF-1, Leptin), and nutrients (Zinc).
• To discuss current knowledge and future research directions in domestic animals.

Main Methods:

• Literature review focusing on molecular signals and signaling pathways.
• Analysis of systemic mediators involved in neuro-immune communication.
• Synthesis of data on neuro-immune cross-talk in both general and domestic animal contexts.

Main Results:

• Identified critical signaling pathways involving pro-inflammatory cytokines, Glucocorticoids (GCs), Growth Hormone (GH), Insulin-like Growth Factor-1 (IGF-1), Leptin, and Zinc (Zn).
• Demonstrated the role of these mediators in potentiating innate immunity, controlling inflammation, and supporting metabolic functions.
• Highlighted limited but promising data on neuro-immune interactions in domestic animals.

Conclusions:

• Bidirectional communication between the CNS and IS is vital for effective host defense and metabolic homeostasis during infection.
• Specific signaling pathways and mediators are crucial for orchestrating this neuro-immune response.
• Further research in domestic animals is needed to elucidate complex interactions and therapeutic potentials.