Dendritic Cell Recruiter: A Pathogen-Agnostic Immune Enhancer for Broad-Spectrum Antimicrobial Protection

Area of Science:

• Biomaterials Science
• Immunology
• Nanotechnology

Background:

• Emerging pathogens and antimicrobial resistance pose significant public health threats.
• There is an urgent need for pathogen-agnostic, broad-spectrum therapeutics.
• Current therapeutic strategies often lack broad applicability against diverse or novel pathogens.

Purpose of the Study:

• To develop a novel immune response-enhancing biomaterial.
• To target dendritic cells to activate innate immunity and strengthen host defense.
• To explore the potential of a dendritic cell-binding peptide conjugated to self-assembling nanofibers as a broad-spectrum therapeutic agent.

Main Methods:

• Conjugation of a dendritic cell-binding peptide (DC) to Q11 self-assembling peptide nanofibers.
• Optimization of DC peptide incorporation (5% relative to unconjugated Q11) using antibody-based binding assays and computational modeling.
• Assessment of dendritic cell maturation via cell surface receptor expression, proinflammatory cytokine production, and anti-inflammatory cytokine levels.

Main Results:

• The DC-Q11 biomaterial demonstrated optimized surface presentation and accessibility of the DC peptide.
• DC-functionalized Q11 nanofibers successfully promoted dendritic cell maturation.
• Key indicators of maturation included increased cell surface receptor expression and altered cytokine profiles (elevated pro-inflammatory, decreased anti-inflammatory).

Conclusions:

• The developed DC-Q11 biomaterial shows promise as a broad-spectrum immunotherapeutic agent.
• This supramolecular materials platform, combined with antibody engineering and cellular assays, facilitates the development of novel immunotherapies.
• Further in vivo evaluation is warranted to fully understand the therapeutic potential against various pathogens.