Self-Immolative Polymer Systems for Drug Delivery Applications
Summary
Self-immolative polymers constitute a class of degradable macromolecules designed to undergo rapid, head-to-tail depolymerisation upon receipt of a specific trigger. This “domino” fragmentation mechanism is enabled by a cleavable trigger unit at one terminus; once removed or transformed by an external or endogenous stimulus, the polymer backbone systematically unzips to release attached payloads. Common stimuli include changes in pH, redox conditions, enzymatic activity, light or electrical potential. By incorporating self-immolative linkages such as quinone-methide, p-aminobenzyl carbonate or arylboronate motifs, researchers have engineered systems that offer precise temporal control and rapid release profiles. These materials can be formulated into nanoparticles, micelles, hydrogels and microcapsules, providing versatile platforms for the encapsulation and targeted delivery of small-molecule drugs, nucleic acids or proteins. Features such as tunable trigger sensitivity, downstream amplification of the depolymerisation signal and compatibility with click‐type chemistries underpin their appeal. Collectively, advances in monomer design, end-group functionalisation and assembly techniques underscore the global significance of self-immolative polymer systems in achieving on-demand, site-specific therapeutic administration with potential to reduce systemic toxicity and improve clinical outcomes.
Research from Nature Portfolio
No recent Nature Portfolio content available.
Self-Immolative Polymer Systems for Drug Delivery Applications publication trend
The graph below shows the total number of articles in self-immolative polymer systems for drug delivery applications across all publications each year (not limited to Nature Index journals).
Technical terms
Self-immolative polymer: A polymer engineered to depolymerise sequentially from one terminus upon trigger removal or transformation, releasing conjugated payloads.
Trigger unit: A chemically labile end-group that responds to a defined stimulus (e.g. pH change, light, enzyme) to initiate head-to-tail depolymerisation.
Quinone-methide elimination: A common self-immolative mechanism in which removal of a caging group generates a reactive quinone-methide intermediate, driving spontaneous backbone fragmentation.
Block copolymer amphiphile: A macromolecule composed of distinct polymer blocks that self-assemble in aqueous media into micelles or nanoparticles, facilitating hydrophobic drug encapsulation.
Stimuli-responsive: Describes materials designed to undergo a chemical or physical change in response to specific environmental cues, enabling controlled payload release.
Microcapsule: A micron-scale hollow particle composed of polymeric shell materials, often incorporating self-immolative linkages for immediate or delayed content release upon stimulation.
References
- Click to Self‐immolation: A “Click” Functionalization Strategy towards Triggerable Self‐Immolative Homopolymers and Block Copolymers. Angewandte Chemie International Edition (2023).
- Self-Immolative Polymers: An Emerging Class of Degradable Materials with Distinct Disassembly Profiles. Journal of the American Chemical Society (2021).
- Recent advances in self-immolative linkers and their applications in polymeric reporting systems. Polymer Chemistry (2022).
About these summaries
This Nature Research Intelligence Topic summary is created with the cited references and a large language model. We take care to ground generated text with facts, and have systems in place to gain human feedback on the overall quality of the process in line with our AI principles. We strive to create accurate and useful summaries for people unfamiliar with the research topic and that supports this goal. These pages are a beta release and will be updated as we learn how best to help people gain value from a research topic summary.
Turn complex research questions into confident strategic decisions
When you're under pressure to set direction, justify investment, or understand your competitive position, you need more than raw data — you need trusted insights you can act on.
Benchmark your performance against global peers using robust, methodologically sound analysis.
Combine quantitative metrics with qualitative expert insight to uncover strengths, gaps and emerging opportunities.
Gain tailored, decision-ready recommendations aligned to your strategic priorities.
Talk to us to learn more about our data dashboards and bespoke strategy reports.
Grow research skills, confidence and careers with training built for every stage of the research lifecycle.
Developed with Nature Portfolio journal Editors and internationally renowned experts. Discover three ways to learn:
Self-paced, online courses in convenient bite-sized units, covering key skills across scientific writing, publishing, grant writing, data analysis, and more.
Expert trainer-led workshops with hands-on exercises and real-time feedback across core research skills, delivered via interactive group sessions.
Editor-led workshops combining core principles in writing and publishing, personalised 1:1 feedback from Nature Portfolio Editors and hands-on exercises.
Explore course catalogues and workshop agendas, enquire about the options or request institutional pricing.