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Analyzing Cellular Internalization of Nanoparticles and Bacteria by Multi-spectral Imaging Flow Cytometry
Published on: June 8, 2012
Maltoheptaose promotes nanoparticle internalization by Escherichia coli
H Surangi N Jayawardena1, Kalana W Jayawardana, Xuan Chen
1Department of Chemistry, University of Massachusetts Lowell, Lowell, MA 01854, USA.
Chemical Communications (Cambridge, England)
|March 7, 2013
Summary
d-maltoheptaose (G7) significantly boosted nanoparticle uptake by Escherichia coli. This enhanced internalization occurred across various bacterial strains and nanoparticle sizes, suggesting a broad application for G7-conjugated nanoparticles.
Area of Science:
- Microbiology
- Nanotechnology
- Bioconjugation
Background:
- Escherichia coli is a common bacterium with a known maltodextrin transport system.
- Nanoparticle delivery into bacterial cells is a key challenge in antimicrobial research.
Purpose of the Study:
- To investigate the effect of d-maltoheptaose conjugation on nanoparticle internalization by Escherichia coli.
- To determine if d-maltoheptaose enhances nanoparticle uptake irrespective of the maltodextrin transport channel presence.
Main Methods:
- Conjugation of nanoparticles with d-maltoheptaose (G7).
- Incubation of G7-conjugated nanoparticles with Escherichia coli strains (with and without maltodextrin transporter).
- Quantification of nanoparticle internalization using various particle sizes (few to 100 nm).
Main Results:
- Nanoparticles conjugated with d-maltoheptaose (G7) exhibited a striking increase in internalization by Escherichia coli.
- Enhanced internalization was observed in E. coli strains possessing and lacking the maltodextrin transport channel.
- The effect was consistent across a range of nanoparticle sizes, from a few to 100 nanometers.
Conclusions:
- d-maltoheptaose conjugation is a highly effective strategy for enhancing nanoparticle delivery into Escherichia coli.
- G7-mediated uptake is independent of the native maltodextrin transport system, offering a versatile approach for bacterial targeting.
- This finding has significant implications for developing novel antimicrobial therapies and diagnostic tools utilizing nanoparticles.
