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Targeted Cancer Therapies

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...

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Preparation and Characterization of Lipophilic Doxorubicin Pro-drug Micelles

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Polymeric Micelles with Reduction-Responsive Function for Targeted Cancer Chemotherapy.

Dong Wan¹, Chao Li¹, Jie Pan¹

¹State Key Laboratory of Separation Membranes and Membrane Processes, School of Chemistry and Chemical Engineering, Tiangong University, Tianjin 300387, P. R. China.

ACS Applied Bio Materials

|January 12, 2022

Summary

New reduction-responsive polymeric micelles enhance cancer drug delivery by improving circulation time and targeting tumors. These micelles release drugs faster inside cancer cells, boosting chemotherapy effectiveness and reducing side effects.

Keywords:

cancer chemotherapy docetaxel micelles reduction-responsive

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Area of Science:

Biomedical Engineering
Nanotechnology
Materials Science

Background:

Conventional nanotechnology-based drug delivery systems face challenges like short blood circulation times, poor tumor targeting, and slow intracellular drug release.
These limitations hinder the efficacy of chemotherapy and can lead to increased systemic toxicity.

Purpose of the Study:

To develop novel reduction-responsive polymeric micelles for targeted cancer chemotherapy.
To overcome the limitations of existing drug delivery systems by enhancing circulation, tumor accumulation, and intracellular drug release.

Main Methods:

Synthesized reduction-responsive polymeric micelles using copolymers of TPGS3350-SS-DTX and TPGS3350-folate.
Utilized TPGS3350 for micelle stabilization and extended blood circulation.
Leveraged the enhanced permeability and retention (EPR) effect and folate-receptor-mediated endocytosis for tumor targeting.
Exploited high intracellular glutathione (GSH) levels for triggered, rapid drug release.

Main Results:

The developed micelles demonstrated active targeting capabilities and extended circulation in the bloodstream.
Efficient tumor cell uptake was observed via folate-receptor-mediated endocytosis.
Fast intracellular drug release was achieved due to the high GSH concentration within cancer cells.
The combined functionalities significantly improved chemotherapeutic efficacy and reduced toxic side effects.

Conclusions:

The novel reduction-responsive micelles offer a promising strategy for targeted cancer drug delivery.
These micelles possess multiple advantageous functions including active targeting, prolonged circulation, and rapid intracellular drug release.
This approach holds potential for clinical application in chemotherapy, improving treatment outcomes and patient safety.