Dietary Nutrients Mediate Intestinal Host Defense Peptide Expression

Area of Science:

• Gastroenterology and immunology
• Nutritional science
• Microbiology

Background:

• The gut mucosa is a critical interface between the host and external environment, facing constant challenges from pathogens and dietary factors.
• Homeostasis disruption in the gut can lead to intestinal and systemic diseases.
• Endogenous host defense peptides (HDPs) are key components of the intestinal barrier, offering protection against microbes.

Purpose of the Study:

• To review current knowledge on host defense peptide (HDP) expression in the gut.
• To explore the role of nutritional interventions in regulating HDPs.
• To provide insights into strategies for enhancing HDPs to improve gut health and reduce antibiotic reliance.

Main Methods:

• Literature review of studies on HDP expression and nutritional regulation in the gut.
• Analysis of mechanisms by which nutrients influence HDP production.
• Synthesis of findings to offer a comprehensive overview and potential tactics.

Main Results:

• Several nutrients, including branched-chain amino acids, short-chain fatty acids (SCFAs), lactose, zinc, and vitamin D3, have been shown to significantly increase HDP expression.
• Nutritional intervention is emerging as a viable strategy to bolster innate immunity in the gut.
• Enhanced HDPs offer a promising approach to combat pathogens and maintain intestinal balance.

Conclusions:

• Nutritional strategies can effectively modulate host defense peptide (HDP) expression in the gut.
• Boosting HDPs presents a novel avenue for managing intestinal inflammation and infections, potentially reducing the need for antibiotics.
• Further research into nutritional regulation of HDPs can lead to improved gut health management.