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A light sensitive self-assembled nanogel as a tecton for protein patterning materials.
Tomoki Nishimura1, Masahiro Takara2, Sada-atsu Mukai1
1Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo, Kyoto 615-8150, Japan. akiyoshi@bio.polym.kyoto-u.ac.jp and ERATO Akiyoshi Bio-Nanotransporter Project, JST, Katsura, Nishikyo, Kyoto 615-8150, Japan.
Chemical Communications (Cambridge, England)
|November 27, 2015
Summary
Researchers created a light-sensitive nanogel film from cholesteryl pullulan (Ls-CHP) with photo-labile ortho-nitrobenzyl (o-NB) units. Patterned films were made using light, enabling the encapsulation of FITC-insulin.
Area of Science:
- Materials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Self-assembled nanogels offer unique properties for advanced material applications.
- Cholesteryl pullulan (CHP) is a biocompatible polysaccharide that can be modified for specific functionalities.
- Photo-labile groups enable light-triggered changes in material structure and properties.
Purpose of the Study:
- To develop a novel light-sensitive nanogel system using modified cholesteryl pullulan.
- To fabricate a patterned nanogel-based film with potential for controlled substance delivery.
- To demonstrate the encapsulation of a model therapeutic, FITC-insulin, within the patterned nanogel film.
Main Methods:
- Synthesis of light-sensitive cholesteryl pullulan (Ls-CHP) incorporating ortho-nitrobenzyl (o-NB) photo-labile units.
- Formation of Ls-CHP nanogels through self-assembly in aqueous solution.
- Fabrication of a nanogel-based film via solution evaporation.
- Photopatterning of the nanogel film using a mask and light exposure.
- Encapsulation of FITC-insulin within the patterned nanogel film.
Main Results:
- Successful self-assembly of Ls-CHP into nanogels.
- Formation of a uniform nanogel-based film from the Ls-CHP nanogel solution.
- Creation of a patterned nanogel film through light-induced crosslinking or degradation (specific mechanism not detailed in abstract).
- Demonstrated capability of the patterned film to encapsulate FITC-insulin.
Conclusions:
- A novel light-sensitive nanogel system based on Ls-CHP has been successfully constructed.
- The developed nanogel film can be patterned using light, offering spatial control over material properties.
- This patterned nanogel film shows promise for applications requiring controlled encapsulation and release of biomolecules like insulin.
