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Composite Scaffolds of Interfacial Polyelectrolyte Fibers for Temporally Controlled Release of Biomolecules
Published on: August 19, 2015
Bioactive galactose-branched polyelectrolyte multilayers and microcapsules: self-assembly, characterization, and
Fu Zhang1, Qi Wu, Zhi-Chun Chen
1Department of Chemistry, Zhejiang University, Hangzhou 310027, People's Republic of China.
Langmuir : the ACS Journal of Surfaces and Colloids
|September 20, 2006
Summary
Researchers developed targeted microcapsules using novel carbohydrate-branched polyelectrolytes. These biocompatible materials demonstrate specific lectin recognition, paving the way for advanced drug delivery systems.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Surface Chemistry
Background:
- Developing targeted drug delivery systems requires precise control over material properties and specific biological interactions.
- Chemoenzymatic synthesis offers a route to novel carbohydrate-branched polyelectrolytes with tailored functionalities.
Purpose of the Study:
- To fabricate multilayers and microcapsules with biologically designed targeting activity using novel carbohydrate-branched polyelectrolytes.
- To investigate the properties and specific recognition capabilities of these fabricated structures.
Main Methods:
- Layer-by-layer (LbL) assembly of a novel cationic d-galactose-branched copolymer [poly(vinyl galactose ester-co-methacryloxyethyl trimethylammonium chloride), PGEDMC] with poly(styrene sulfonate) (PSS).
- Fabrication on diverse substrates including quartz slides, PET films, silicon wafers, and polystyrene microparticles.
- Characterization using UV-vis, contact angle, AFM, TEM, and SEM.
- Assessment of specific lectin recognition using fluorescence spectroscopy.
Main Results:
- Successful fabrication of PGEDMC/PSS multilayers and hollow microcapsules on various surfaces.
- Demonstrated tunability of film properties by adjusting polyelectrolyte concentration, ionic strength, and counteranion type.
- PGEDMC/PSS structures exhibited specific recognition of peanut agglutinin (PNA) lectin, attributed to the beta-galactose recognition signals, while showing minimal interaction with concanavalin A (Con A) lectin.
Conclusions:
- Chemoenzymatic synthesis enables the creation of carbohydrate-branched polyelectrolytes for targeted biomaterial applications.
- The LbL technique is effective for fabricating functional multilayers and microcapsules with specific biological recognition.
- These d-galactose-functionalized PGEDMC/PSS materials show promise for applications requiring specific lectin binding, such as targeted diagnostics or therapeutics.
