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A PEGylated megamer-based microRNA delivery system activatable by stepwise microenvironment stimulation.
Wangteng Wu1, Qida Hu2, Meng Wang2
1Department of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China. liangtingbo@zju.edu.cn and Institute of Chemical Biology and Pharmaceutical Chemistry, Zhejiang University, Hangzhou 310028, China. tangguping@zju.edu.cn.
Chemical Communications (Cambridge, England)
|July 19, 2019
Summary
Researchers created a novel biodegradable delivery system for microRNA (miRNA) therapy. This system targets liver cancer by enhancing miR-122 expression in the tumor microenvironment.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Cancer Therapy
Background:
- MicroRNA (miRNA) therapy holds promise for cancer treatment.
- Effective delivery systems are crucial for miRNA therapeutic success.
- Targeting the tumor microenvironment enhances therapeutic efficacy.
Purpose of the Study:
- To develop a biodegradable, oncosensitive delivery system for miRNA therapy.
- To create a system that can be activated by the tumor microenvironment.
- To improve the delivery and expression of miR-122 for liver cancer treatment.
Main Methods:
- Development of a megamer-based nanotherapeutic delivery system.
- Design of a system activatable by acidity and reduction stimuli.
- In vitro and in vivo evaluation of the delivery system's efficiency.
Main Results:
- The nanotherapeutics demonstrated biodegradability and oncosensitivity.
- Stepwise activation by acidity and reduction was achieved.
- Efficient improvement of liver-specific miR-122 expression was observed.
Conclusions:
- The developed system shows potential for translational application of miR-122 therapy.
- This delivery system enhances miRNA targeting in liver cancer.
- The oncosensitive nanotherapeutics offer a promising approach for cancer treatment.
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