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Targeted Plasma Membrane Delivery of a Hydrophobic Cargo Encapsulated in a Liquid Crystal Nanoparticle Carrier
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Improving drug potency and efficacy by nanocarrier-mediated subcellular targeting

Mami Murakami1, Horacio Cabral, Yu Matsumoto

  • 1Department of Bioengineering, Graduate School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.

Science Translational Medicine
|January 7, 2011
PubMed

Insights

Polymeric micelles loaded with a platinum drug accumulate in tumors and release their payload in late endosomes. This targeted delivery enhances antitumor activity, even in drug-resistant cancers.

Area of Science:

  • Oncology
  • Nanomedicine
  • Drug Delivery

Background:

  • Nanocarrier-mediated drug targeting enhances chemotherapy efficacy by accumulating drugs in tumors.
  • Polymeric micelles are a promising nanocarrier system for cancer therapy.

Purpose of the Study:

  • To investigate the subcellular fate of polymeric micelles incorporating (1,2-diaminocyclohexane) platinum(II) (DACHPt/m).
  • To assess the kinetic stability and tumor accumulation of DACHPt/m.
  • To evaluate the antitumor activity of DACHPt/m compared to free oxaliplatin.

Main Methods:

  • Real-time fluorescence-based assessment of DACHPt/m in tumor tissues.
  • Kinetic stability analysis of nanocarriers.
  • Comparison of antitumor activity in vitro and in vivo.

Main Results:

  • DACHPt/m extravasated from blood vessels and dissociated within tumor cells.
  • Selective dissociation of DACHPt/m occurred in late endosomes, facilitating nuclear drug delivery.
  • DACHPt/m demonstrated enhanced antitumor activity compared to oxaliplatin, including against resistant tumors.

Conclusions:

  • Nanocarriers can be engineered to target specific subcellular compartments for improved drug delivery.
  • DACHPt/m exhibits superior efficacy by circumventing cellular drug resistance mechanisms.
  • Subcellular targeting nanocarriers hold significant potential for clinical cancer therapy.

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