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Immuno-Stimulatory Peptides as a Potential Adjunct Therapy against Intra-Macrophagic Pathogens
Tânia Silva1,2, Maria Salomé Gomes3,4,5
1i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto 4200-135, Portugal. tania.silva@ibmc.up.pt.
Abstract:
The treatment of infectious diseases is increasingly prone to failure due to the rapid spread of antibiotic-resistant pathogens. Antimicrobial peptides (AMPs) are natural components of the innate immune system of most living organisms. Their capacity to kill microbes through multiple mechanisms makes the development of bacterial resistance less likely. Additionally, AMPs have important immunomodulatory effects, which critically contribute to their role in host defense. In this paper, we review the most recent evidence for the importance of AMPs in host defense against intracellular pathogens, particularly intra-macrophagic pathogens, such as mycobacteria. Cathelicidins and defensins are reviewed in more detail, due to the abundance of studies on these molecules. The cell-intrinsic as well as the systemic immune-related effects of the different AMPs are discussed. In the face of the strong potential emerging from the reviewed studies, the prospects for future use of AMPs as part of the therapeutic armamentarium against infectious diseases are presented.
Insights
Antimicrobial peptides (AMPs) show promise in combating antibiotic-resistant infections by killing microbes and modulating immunity. This review highlights their role in fighting intracellular pathogens, suggesting future therapeutic applications.
Area of Science:
- Immunology
- Infectious Diseases
- Biochemistry
Background:
- Antibiotic resistance is a growing threat to infectious disease treatment.
- Antimicrobial peptides (AMPs) are key components of the innate immune system.
- AMPs offer multi-target mechanisms against microbes, reducing resistance development.
Purpose of the Study:
- To review recent evidence on AMPs in host defense against intracellular pathogens.
- To discuss the immunomodulatory and cell-intrinsic effects of AMPs.
- To explore the therapeutic potential of AMPs for infectious diseases.
Main Methods:
- Literature review of recent studies on AMPs.
- Focus on cathelicidins and defensins.
- Analysis of cell-intrinsic and systemic immune effects.
Main Results:
- AMPs are crucial for defense against intracellular pathogens, including mycobacteria.
- Specific AMPs like cathelicidins and defensins exhibit significant antimicrobial and immunomodulatory functions.
- Evidence supports both cell-intrinsic and systemic immune roles for AMPs.
Conclusions:
- AMPs demonstrate significant potential as therapeutic agents against infectious diseases.
- Their unique mechanisms offer a promising alternative to conventional antibiotics.
- Further research into AMPs could lead to novel treatments for resistant infections.
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