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Published on: December 23, 2016
Highly efficient intracellular drug delivery with a negatively charged hyperbranched polysulfonamine
Suyun Chen1, Zhonghua Tan, Nan Li
1Department of Nuclear Medicine, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
Macromolecular Bioscience
|March 9, 2011
Summary
An easily prepared, negatively charged polysulfonamine (PSA) facilitates efficient intracellular drug delivery. This anionic polymer shows low cytotoxicity and effectively delivers doxorubicin to tumor cells, inhibiting their growth.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Drug Delivery Systems
Background:
- Developing efficient intracellular delivery systems is crucial for targeted therapies.
- Anionic polymers offer potential for drug encapsulation and controlled release.
- Polysulfonamines are a class of polymers with tunable properties.
Purpose of the Study:
- To synthesize and characterize a hyperbranched polysulfonamine (PSA) for intracellular drug delivery.
- To investigate the cellular uptake, subcellular distribution, and cytotoxicity of PSA.
- To evaluate the efficacy of a PSA/doxorubicin complex for targeted cancer therapy.
Main Methods:
- Synthesis of a hyperbranched polysulfonamine.
- Cellular uptake and subcellular localization studies using microscopy.
- In vitro cytotoxicity assays on tumor and normal cells.
- Preparation and characterization of PSA/doxorubicin complexes.
- In vitro drug release studies under varying pH conditions.
Main Results:
- The synthesized polysulfonamine (PSA) is easily prepared and remains negatively charged at physiological pH.
- PSA demonstrates efficient cellular uptake and low in vitro cytotoxicity.
- PSA/doxorubicin complexes exhibit high drug loading and pH-responsive controlled release.
- The PSA/doxorubicin complex shows significant tumor cell growth inhibition and low toxicity to normal cells.
Conclusions:
- Hyperbranched, anionic polysulfonamines are effective carriers for intracellular drug delivery.
- PSA exhibits favorable properties for developing targeted cancer therapeutics.
- Anionic polymers represent a promising strategy for the delivery of therapeutic agents.
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