Clinical Orthopaedics and Related Research®

, Volume 471, Issue 3, pp 915–925 | Cite as

Lipid-functionalized Dextran Nanosystems to Overcome Multidrug Resistance in Cancer: A Pilot Study

  • Eisuke Kobayashi
  • Arun K. Iyer
  • Francis J. Hornicek
  • Mansoor M. Amiji
  • Zhenfeng Duan
Symposium: Highlights from the First Combined 2011 Meeting of the Musculoskeletal Tumor Society and Connective Tissue Oncology Society



The toxicity of anticancer agents and the difficulty in delivering drugs selectively to tumor cells pose a challenge in overcoming multidrug resistance (MDR). Recently, nanotechnology has emerged as a powerful tool in addressing some of the barriers to drug delivery, including MDR in cancer, by utilizing alternate routes of cellular entry and targeted delivery of drugs and genes. However, it is unclear whether doxorubicin (Dox) can be delivered by nanotechnologic approaches.


We asked whether (1) Dox-loaded lipid-functionalized dextran-based biocompatible nanoparticles (Dox/NP) can reverse MDR, (2) Dox/NP has more potent cytotoxic effect on MDR tumors than poly(ethylene glycol)-modified liposomal Dox (PLD), and (3) multidrug resistance protein 1 (MDR1) small interfering RNA loaded in these nanoparticles (siMDR1/NP) can modulate MDR.


To create stable Dox/NP and siMDR1/NP, we used two different lipid-modified dextran derivatives. The effect of Dox or Dox/NP was tested on drug-sensitive osteosarcoma (KHOS) and ovarian cancer (SKOV-3) cell cultures in triplicate and their respective MDR counterparts KHOSR2 and SKOV-3TR in triplicate. We determined the effects on drug retention, transfection efficacy of siMDR1/NP, and P-glycoprotein expression and the antiproliferative effect between Dox/NP and PLD in MDR tumor cells.


Fluorescence microscopy revealed efficient uptake of the Dox/NP and fluorescently tagged siMDR1/NP. Dox/NP showed five- to 10-fold higher antiproliferative activity at the 50% inhibitory concentration than free Dox in tumor cells. Dox/NP showed twofold higher activity than PLD in MDR tumor cells. siMDR1/NP (100 nM) suppressed P-glycoprotein expression in KHOSR2.


Dextran-lipid nanoparticles are a promising platform for delivering Dox and siRNAs.

Clinical Relevance

Biocompatible dextran-based nanoparticles that are directly translatable to clinical medicine may lead to new potential therapeutics for reversing MDR in patients with cancer.


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Copyright information

© The Association of Bone and Joint Surgeons® 2012

Authors and Affiliations

  • Eisuke Kobayashi
    • 1
    • 2
    • 3
  • Arun K. Iyer
    • 4
  • Francis J. Hornicek
    • 1
    • 2
    • 3
  • Mansoor M. Amiji
    • 4
  • Zhenfeng Duan
    • 1
    • 2
    • 3
  1. 1.Sarcoma Biology Laboratory, Center for Sarcoma and Connective Tissue OncologyMassachusetts General HospitalBostonUSA
  2. 2.Department of Orthopaedic SurgeryMassachusetts General HospitalBostonUSA
  3. 3.Harvard Medical SchoolMassachusetts General HospitalBostonUSA
  4. 4.Department of Pharmaceutical Sciences, School of PharmacyNortheastern UniversityBostonUSA

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