Host defense peptides and their antimicrobial-immunomodulatory duality

Area of Science:

• Immunology and Microbiology
• Biochemistry

Background:

• Host defence peptides (HDPs) are crucial innate immunity effectors in most organisms.
• These molecules exhibit diverse biological activities, including pathogen killing and immune response modulation.
• Imbalanced HDP expression is implicated in various diseases across organ systems.

Purpose of the Study:

• To review the dual antimicrobial and immunomodulatory roles of HDPs.
• To highlight the clinical relevance and therapeutic potential of HDPs.
• To provide an overview of HDPs as model molecules for drug development.

Main Methods:

• Literature review of host defence peptides.
• Analysis of antimicrobial and immunomodulatory functions.
• Examination of HDPs in disease pathology and therapeutic applications.

Main Results:

• HDPs possess potent direct antimicrobial activity against pathogens.
• HDPs significantly modulate host immune responses and inflammation.
• HDPs are implicated in various diseases, with imbalanced expression correlating with pathology.

Conclusions:

• HDPs are vital for innate immunity, displaying a critical antimicrobial-immunomodulatory duality.
• Dysregulated HDPs are linked to diverse pathologies, underscoring their clinical significance.
• HDPs represent promising candidates for novel natural antibiotics and immunoregulatory agents.