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Modified-Release Drug Delivery Systems: Site-Targeted01:24

Modified-Release Drug Delivery Systems: Site-Targeted

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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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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Related Experiment Video

Updated: Jun 11, 2026

Contrast Ultrasound Targeted Treatment of Gliomas in Mice via Drug-Bearing Nanoparticle Delivery and Microvascular Ablation
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Nano-Drug Delivery Systems Targeting MMPs: A Promising Treatment for Gliomas.

Jie Liu1,2, Pengfei Xie2, Zhicheng Wang2

  • 1Department of Radiotherapy, Second Hospital of Jilin University, Changchun, Jilin, People's Republic of China.

International Journal of Nanomedicine
|December 12, 2025
PubMed
Summary
This summary is machine-generated.

Matrix metalloproteinases (MMPs) are key in glioma progression. MMP-responsive nano-drug delivery systems, activated by cell-penetrating peptides (CPPs), offer targeted treatment for brain tumors like glioblastoma.

Keywords:
cell-penetrating peptidesglioblastomamatrix metalloproteinasenano-drug delivery systemsnanomaterial

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Area of Science:

  • Neuro-oncology
  • Biotechnology
  • Nanomedicine

Background:

  • Gliomas, particularly glioblastoma (grade IV), are aggressive Central Nervous System (CNS) tumors with poor prognosis.
  • Matrix metalloproteinases (MMPs) play a critical role in the tumor microenvironment, influencing glioma malignancy, invasion, and metastasis.
  • Nanoparticle drug delivery systems offer potential for targeted and sustained drug delivery in various pathologies.

Purpose of the Study:

  • To review the relationship between MMPs and gliomas, including regulatory mechanisms.
  • To discuss nano-drug delivery systems, nanomaterials, and administration routes for glioma treatment.
  • To explore the application of cell-penetrating peptides (CPPs) in MMP-responsive nano-drug delivery systems for gliomas.

Main Methods:

  • Comprehensive literature review on MMPs, gliomas, and nano-drug delivery systems.
  • Analysis of MMP expression in glioma tissues and correlation with malignancy.
  • Focus on activatable CPPs and their integration into MMP-responsive nano-systems.

Main Results:

  • MMP expression positively correlates with glioma grade and aggressiveness, suggesting their potential as therapeutic targets.
  • MMP-responsive nano-drug delivery systems can activate CPPs, enabling targeted drug release.
  • These systems demonstrate efficient blood-brain barrier (BBB) penetration and glioma targeting.

Conclusions:

  • MMPs are viable targets for glioma detection and therapy.
  • MMP-responsive nano-drug delivery systems combined with CPPs offer a promising strategy for glioma management.
  • This approach enhances drug delivery efficiency and precision, potentially benefiting glioma patients.