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pH- and redox-responsive polysaccharide-based microcapsules with autofluorescence for biomedical applications
Liang Gao1, Jinbo Fei, Jie Zhao
1Beijing National Laboratory for Molecular Sciences, Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Zhong Guan Cun, Beijing, 100190, PR China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 21, 2012
Summary
Researchers created pH- and redox-responsive autofluorescent microcapsules using alginate dialdehyde and cystamine dihydrochloride. These smart microcapsules enable targeted intracellular delivery, offering a versatile platform for biomedical applications.
Area of Science:
- Materials Science
- Biomedical Engineering
- Nanotechnology
Background:
- Developing stimuli-responsive materials is crucial for targeted drug delivery.
- Polysaccharide-based materials offer biocompatibility and versatility.
- Controlled assembly techniques are needed for precise nanomaterial fabrication.
Purpose of the Study:
- To develop novel autofluorescent microcapsules with dual pH- and redox-responsive properties.
- To investigate the potential of these microcapsules for targeted intracellular delivery.
- To establish a versatile method for fabricating stimuli-responsive nanomaterials.
Main Methods:
- Layer-by-layer (LBL) assembly technique was employed.
- Covalent cross-linking of alginate dialdehyde (ADA) derivative and cystamine dihydrochloride (CM).
- Formation of Schiff base and disulfide bonds for stimuli responsiveness.
Main Results:
- Successfully fabricated autofluorescent microcapsules with dual pH- and redox-responsive characteristics.
- Demonstrated the potential for triggered release based on intracellular and extracellular physiological differences.
- The LBL method proved simple and versatile for material fabrication.
Conclusions:
- The developed microcapsules offer a promising platform for targeted intracellular delivery.
- The fabrication method is adaptable for creating various autofluorescent nano- and micromaterials.
- Dual stimuli-responsive materials hold significant potential in advanced biomedical applications.
