Related Experiment Video
Updated: Jun 27, 2025
Polymalic Acid-based Nano Biopolymers for Targeting of Multiple Tumor Markers: An Opportunity for Personalized Medicine?
Published on: June 13, 2014
Theranostic Bottle-Brush Polymers Tailored for Universal Solid-Tumor Targeting
Wei Zhang1, Yanwen Xu2, Rongjun Guo2
1School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, Guangdong, China.
Abstract:
Designing an efficient nanocarrier to target multiple types of cancer remains a major challenge in the development of cancer nanomedicines. The majority of systemically administered nanoparticles (NPs) are rapidly cleared by the liver, resulting in poor tumor-targeting efficiency and severe side effects. Here, we present a delicately tailored design and synthesis of fluorescent bottle-brush polymers and screen nine derived NPs, each varying in size and surface coatings, for tumor imaging and targeted delivery. Our optimized polymer bearing (oligo(ethylene glycol) methyl ether methacrylate) in the side chains shows reduced macrophage uptake, prolonged blood-circulation time (up to 27 h), and exceptionally high accumulation in the tumor compared to the liver, elucidating an immune-evasion-induced tumor-targeting mechanism. High tumor accumulation significantly improved the antitumor efficacy. The outstanding tumor-targeting ability has been further validated across five distinct tumor models, including orthotopic glioblastoma and pancreatic cancer, which demonstrate the universality of our polymeric nanocarrier for tumor-targeting delivery.
Insights
Researchers developed novel polymeric nanoparticles that evade immune clearance, significantly enhancing tumor targeting and accumulation for improved cancer nanomedicine delivery and efficacy across multiple cancer types.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Oncology
Background:
- Targeting multiple cancer types with nanomedicines is challenging due to rapid clearance by the liver.
- Poor tumor targeting leads to reduced efficacy and increased side effects.
Purpose of the Study:
- To design and synthesize novel fluorescent bottle-brush polymers for cancer nanomedicine.
- To evaluate nanoparticle (NP) performance for tumor imaging and targeted delivery.
Main Methods:
- Synthesized fluorescent bottle-brush polymers with varying NP sizes and surface coatings.
- Assessed NP blood circulation time, macrophage uptake, and tumor accumulation in vivo.
- Evaluated antitumor efficacy and validated targeting across five distinct tumor models.
Main Results:
- Optimized NPs exhibited reduced macrophage uptake and prolonged circulation time (up to 27 hours).
- Achieved significantly higher tumor accumulation compared to liver accumulation.
- Demonstrated improved antitumor efficacy and broad applicability in diverse cancer models.
Conclusions:
- The developed polymeric nanocarrier demonstrates an effective immune-evasion-induced tumor-targeting mechanism.
- This nanocarrier shows universal potential for enhanced tumor imaging and targeted delivery in various cancers.
