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Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications
Published on: February 7, 2021
Advances in the Application of Injectable Thermosensitive Hydrogel Systems for Cancer Therapy
Abstract:
Systemic administration of anticancer therapeutic agents remains a crucial strategy for clinical cancer therapy. However, poor drug accumulation at tumor sites and severe side effects to normal tissues induced by off-target effects lower their therapeutic efficiency and limit their deep application in clinical settings. How to overcome these issues has continuously raised concerns. Reportedly, injectable thermosensitive hydrogels are good carriers for local drug delivery systems, demonstrating a flowable and injectable sol state at room temperature, easily loading therapeutic agents with large loading contents. Under normal body temperature, these hydrogels are stimulated to undergo a phase transition to an immobile gel state, which serves as a drug reservoir at local injection sites. After intratumoral or peritumoral injection, the localized hydrogel reservoir shows a slow and sustained drug release behavior, and can also targeted deliver therapeutic agents to cancer cells instead of normal cells, improving the therapeutic efficiency and reducing systemic side effects. This review summarizes the development of injectable thermosensitive hydrogel systems, reviews the research application advances of these systems in different therapy strategies for cancer, discusses the present issues and awaits their future in clinical applications.
Insights
Injectable thermosensitive hydrogels offer a promising solution for localized cancer therapy. These smart materials improve drug delivery to tumors, enhancing efficacy and minimizing side effects for better patient outcomes.
Area of Science:
- Biomaterials Science
- Drug Delivery Systems
- Oncology
Background:
- Systemic anticancer drug delivery faces challenges like poor tumor accumulation and off-target toxicity.
- Injectable thermosensitive hydrogels are explored as advanced local drug delivery carriers.
- Overcoming limitations in current cancer therapy efficiency and side effects is a critical need.
Purpose of the Study:
- To review the development of injectable thermosensitive hydrogel systems for cancer therapy.
- To summarize research advances in applying these hydrogels across various cancer treatment strategies.
- To discuss current challenges and future prospects of thermosensitive hydrogels in clinical oncology.
Main Methods:
- Review of scientific literature on injectable thermosensitive hydrogels for cancer treatment.
- Analysis of hydrogel properties, including injectability, thermosensitivity, and drug loading capacity.
- Evaluation of in vitro and in vivo studies demonstrating therapeutic efficacy and safety profiles.
Main Results:
- Thermosensitive hydrogels transition from sol to gel at body temperature, forming a local drug reservoir.
- These hydrogels enable sustained drug release, improving tumor drug accumulation.
- Localized delivery via hydrogels enhances therapeutic efficiency and reduces systemic toxicity.
Conclusions:
- Injectable thermosensitive hydrogels represent a significant advancement in localized cancer drug delivery.
- Their ability to improve drug targeting and reduce side effects holds great potential for clinical application.
- Further research and clinical trials are needed to fully realize the therapeutic promise of these hydrogel systems.
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