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Updated: May 25, 2026
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Biomimetic Materials to Characterize Bacteria-host Interactions
Published on: November 16, 2015
DNA-mimic for Specific Surface Functionalization of Zr-MOFs for Bacterial Targeting
Anna Scheeder1, Jon Ostolaza-Paraiso1, Andrew G Baker1
1Department of Chemical Engineering & Biotechnology, University of Cambridge, Cambridge, UK.
Angewandte Chemie (International Ed. in English)
|May 23, 2026
Summary
Researchers developed a faster method to modify nanoparticles using peptide nucleic acids (PNAs) for improved drug delivery and targeting in biomedical applications.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Chemical Engineering
Background:
- Nanosized metal-organic frameworks (MOFs) offer potential in biomedicine but require surface modification for stability and specificity.
- Current DNA-based MOF surface modifications lack site-specificity and hinder further functionalization.
Purpose of the Study:
- To develop a rapid, single-step surface modification for PCN-222 MOFs using peptide nucleic acids (PNAs).
- To enhance nanoparticle stability, control drug release, and enable targeted delivery.
Main Methods:
- Post-synthesis surface modification of PCN-222 nanoparticles using phosphate-modified PNAs.
- Coordination of PNAs to Zr6 clusters on the MOF surface.
- Assessment of nanoparticle characteristics, drug release kinetics, and targeting efficiency.
Main Results:
- Achieved monodispersed nanoparticles with slowed drug release kinetics compared to unmodified MOFs.
- PNAs demonstrated superior attachment efficiency and hybridization specificity over DNA.
- Enabled targeted bacterial delivery of drug-loaded MOFs through subsequent conjugation.
Conclusions:
- Phosphotyrosine-modified PNA is a superior single-step surface coating for PCN-222 MOFs.
- This method allows controlled post-functionalization for advanced biomedical and materials science applications.
