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Related Concept Videos

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Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.
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Engineered Dual pH/GSH-Responsive Lignin-Based Nanocarriers for Enhanced Tumor Growth Inhibition.

Jin Wang1, Zhuang Wang1, Suyang Dai1

  • 1State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.

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Summary

Researchers developed a dual-stimulus responsive lignin-based nanocarrier for targeted cancer therapy. This novel system selectively releases doxorubicin (DOX) in the tumor microenvironment, enhancing antitumor efficacy and reducing systemic toxicity.

Keywords:
GSHdual-responsivelignin-based nanocarriernanoparticle drug delivery systemspHtumor treatment

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Drug Delivery Systems

Background:

  • The tumor microenvironment presents unique characteristics, including acidic pH and elevated glutathione (GSH) levels, which can be exploited for targeted drug delivery.
  • Lignin, a sustainable biopolymer, offers potential for developing biodegradable nanocarriers due to its abundance and tunable properties.

Purpose of the Study:

  • To design and characterize a lignin-based nanocarrier system responsive to the acidic pH and high GSH levels characteristic of the tumor microenvironment.
  • To develop a doxorubicin (DOX)-loaded nanomedicine platform for enhanced antitumor treatment with reduced systemic toxicity.

Main Methods:

  • Lignin-based nanoparticles (approx. 150 nm) were synthesized and characterized for their physicochemical properties.
  • Dual-stimuli responsiveness was evaluated through *in vitro* drug release studies under simulated tumor conditions (pH 6.5, 10 mM GSH).
  • Biological evaluations included cytotoxicity assays on 4T1 breast cancer cells and normal cells, as well as *in vivo* therapeutic efficacy studies in 4T1 tumor-bearing mice.

Main Results:

  • Uniform lignin-based nanoparticles with controlled properties were successfully prepared.
  • Selective and enhanced doxorubicin release was observed under simulated tumor conditions.
  • The drug-loaded nanoparticles demonstrated potent cytotoxicity against cancer cells while maintaining high viability in normal cells, indicating good biocompatibility.
  • Significant tumor growth inhibition (71.84%) was achieved in mice, surpassing that of free DOX (58.78%), with reduced systemic toxicity.

Conclusions:

  • The study successfully transformed sustainable lignin into an efficient, dual-stimuli responsive nanocarrier for targeted cancer therapy.
  • Precise chemical modification enabled the combination of biopolymer advantages with stimulus-triggered drug release, leading to promising biodegradable nanocarriers.
  • This lignin-based nanomedicine platform offers a viable strategy for improving antitumor treatment efficacy and minimizing side effects.