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Published on: March 25, 2015
N,N,N-Trimethylchitosan chloride as a gene vector: synthesis and application
Zhengwei Mao1, Lie Ma, Yan Jiang
1Key Laboratory of Macromolecular Synthesis and Functionalization, Ministry of Education, and Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
Macromolecular Bioscience
|June 6, 2007
Summary
N,N,N-Trimethylchitosan chloride (TMC) shows potential as a gene carrier, with particle size influenced by the N/P ratio. While short-term biocompatibility is good, long-term studies reveal high toxicity, indicating a need for further modification.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Chitosan derivatives are explored for biomedical applications, including gene delivery.
- N,N,N-Trimethylchitosan chloride (TMC) offers tunable properties for advanced material development.
Purpose of the Study:
- To synthesize and characterize N,N,N-Trimethylchitosan chloride (TMC) with varying quaternization degrees.
- To evaluate the physicochemical properties and biocompatibility of synthesized TMC nanoparticles.
- To assess the potential of TMC as a gene delivery vector.
Main Methods:
- Synthesis of TMC with controlled quaternization.
- (1)H NMR spectroscopy for characterization.
- Particle size analysis (150-600 nm).
- Zeta potential measurements.
- Biocompatibility testing (short-term and long-term contact experiments).
Main Results:
- TMC particle size is primarily dependent on the N/P ratio, with less influence from the quaternization degree.
- Particles predominantly exhibit spherical morphology.
- Zeta potential increases with N/P ratio and TMC quaternization degree.
- Short-term biocompatibility was observed, but long-term studies indicated significant toxicity.
Conclusions:
- TMC nanoparticles possess favorable characteristics for gene delivery applications.
- Particle size and surface charge can be modulated by adjusting N/P ratio and quaternization.
- High long-term toxicity necessitates further modifications to enhance cytocompatibility for safe in vivo use.
