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Updated: Feb 15, 2026

Models and Methods to Evaluate Transport of Drug Delivery Systems Across Cellular Barriers
Published on: October 17, 2013
ROS-responsive drug delivery systems
Jing Liang1, Bin Liu1,2
1Dept of Chemical and Biomolecular Engineering National University of Singapore 117585 Singapore.
Abstract:
Reactive oxygen species (ROS) play an important role in signal transduction and metabolism. Over-produced ROS in cells or tissues, however, often leads to oxidation stress that has implications in a series of diseases including cancer, aging, atherosclerosis and inflammation. Driven by the need for on-demand drug delivery and fuelled by recent development of ROS-responsive materials and nanomedicine, responsive drug delivery systems (DDSs) have gained increasing research interest. ROS-responsive DDS is designed to release therapeutic agents only in targets of interest that produce excessive ROS, which may lead to both enhanced therapeutic efficiency and reduced side effects. Multiple-stimuli responsive DDSs that are also sensitive to other stimuli can further enhance controlled drug release in sites where multiple stimuli coexist. Beyond drug delivery, multifunctional DDSs have great potential in achieving simultaneous imaging, combinatorial therapy and targeting ability by introducing multifunctional elements such as signal reporter, targeting elements and photosensitizer. This review will summarize the latest development of ROS-responsive DDSs and discuss their design principle and biomedical applications.
Insights
Reactive oxygen species (ROS) are crucial in cell signaling but excess ROS causes oxidative stress and disease. ROS-responsive drug delivery systems (DDSs) offer targeted therapy with reduced side effects.
Area of Science:
- Biomedical Engineering
- Nanomedicine
- Materials Science
Background:
- Reactive oxygen species (ROS) are vital for cellular signaling and metabolism.
- Excessive ROS production causes oxidative stress, implicated in diseases like cancer, aging, and inflammation.
- ROS-responsive drug delivery systems (DDSs) are emerging to address these challenges.
Purpose of the Study:
- To review the latest advancements in ROS-responsive DDSs.
- To discuss the design principles of these responsive systems.
- To explore their diverse biomedical applications.
Main Methods:
- Literature review of recent research on ROS-responsive DDSs.
- Analysis of design strategies for controlled drug release.
- Examination of multifunctional DDS capabilities.
Main Results:
- ROS-responsive DDSs enable targeted drug release at sites with high ROS levels.
- These systems enhance therapeutic efficacy and minimize systemic side effects.
- Multifunctional DDSs offer combined imaging, therapy, and targeting.
Conclusions:
- ROS-responsive DDSs represent a promising frontier in targeted drug delivery.
- Advanced designs incorporating multiple stimuli and functionalities are expanding their potential.
- These systems hold significant promise for treating ROS-associated diseases.
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