# Study of Human Antimicrobial Peptides Active Against Some Bacteroidota Species of the Oral Cavity

## TL;DR

This study explores human antimicrobial peptides as potential alternatives to antibiotics for treating infections caused by certain bacteria in the mouth.

## Contribution

The study identifies three specific human-derived peptides with antimicrobial activity against Bacteroidota species.

## Key findings

- Three peptides—KTL24, LIR23, and MFP22—showed notable antimicrobial potential.
- These peptides are derived from human proteins SPI1, NAPSA, and SCUB1.
- The peptides could serve as alternatives or complements to traditional antibiotics.

## Abstract

The increasing problem of antibiotic resistance is a critical global health issue, necessitating the development of alternative therapeutic strategies to manage infections effectively. Among the promising solutions are human antimicrobial peptides (AMPs), naturally occurring molecules known for their broad spectrum of antimicrobial activity. Background/Objectives: This study investigates the potential of some AMPs, selected through a bioinformatic approach, as alternatives to conventional antibiotics, particularly focusing on their efficacy against species within the Bacteroidota phylum. These species, including pathogens such as Porphyromonas gingivalis, Capnocytophaga ochracea, and Capnocytophaga canimorsus, are well known for their roles in various human infections and related diseases. Non-pathogenic environmental species, such as Flavobacterium johnsoniae, are also included in this group, frequently used as a model organism. Methods: By analyzing the antimicrobial efficacy, mechanisms of action, and potential therapeutic applications of human AMPs, this research underscores their significance in addressing the challenge of antibiotic resistance. Results: This study identified three peptides, KTL24, LIR23, and MFP22, as particularly interesting. These peptides are derived from specific human proteins, namely SPI1, NAPSA and SCUB1. Conclusions: Their notable antimicrobial potential suggests that AMPs could serve either as a complementary treatment alongside traditional antibiotics or as a standalone therapy, mitigating the ongoing spread of antibiotic resistance and offering an alternative in global health strategies.