Engineering immunomodulatory nanoplatforms from commensal bacteria-derived polysaccharide A

Area of Science:

• Biotechnology
• Immunology
• Materials Science

Background:

• Capsular zwitterionic polysaccharides (CZPs) from gut bacteria are key immunomodulators.
• Their T cell-dependent immune response suggests potential in disease treatment and vaccines.

Purpose of the Study:

• To explore synthetic strategies for creating immunologically active polymer-carbohydrate conjugates and nanomaterials from Polysaccharide A (PSA).
• To develop novel vaccines or immunotherapeutics using these engineered materials.

Main Methods:

• Purification of PSA using anion exchange HPLC with CHAPS.
• Modification of PSA with azide groups for click chemistry conjugation.
• Formation of nanoparticles via conjugation with DBCO-functionalized polymers and thiol-yne chemistry.

Main Results:

• Pure PSA was isolated and functionalized for conjugation.
• Amphiphilic conjugates formed nanoparticles around 100 nm.
• Conjugates and nanoparticles demonstrated immunological activity via TLR2 activation and IL-10 production.

Conclusions:

• Chemical biology strategies enable the fabrication of immunomodulatory nanomaterials from commensal microorganisms.
• These engineered materials show promise as novel vaccines or immunotherapeutics.