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Wool-Like Hollow Polymeric Nanoparticles for CML Chemo-Combinatorial Therapy.

Barbara Cortese1, Stefania D'Amone2, Ilaria Elena Palamà3

  • 1Nanotechnology Institute, CNR-Nanotechnology Institute (CNR-NANOTEC), University La Sapienza, P.zle A. Moro, 00185 Roma, Italy. barbara.cortese@nanotec.cnr.it.

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|April 20, 2018
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Summary

This study introduces novel nanoparticles for chronic myeloid leukaemia (CML) combinatorial therapy, effectively delivering Nilotinib and Imatinib Mesylate to enhance treatment efficacy and minimize drug resistance.

Keywords:
CML cellscombinatorial therapypolymeric nanoparticles

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Oncology

Background:

  • Chronic myeloid leukaemia (CML) is driven by the BCR-ABL oncogene.
  • Targeted tyrosine-kinase inhibitors offer partial responses but face resistance.
  • Nanosystems enable combinatorial drug delivery with controlled pharmacokinetics.

Purpose of the Study:

  • To develop a novel poly-(ε-caprolactone) (PCL) nanosystem for dual-drug combinatorial therapy in CML.
  • To encapsulate Nilotinib (Nil) and Imatinib Mesylate (IM) within a pH and enzyme-sensitive PCL nanoparticle structure.
  • To evaluate the synchronized drug release, cytotoxicity, and therapeutic efficiency of the dual-drug nanosystem.

Main Methods:

  • Fabrication of wool-like, hollow PCL nanoparticles with a pH-sensitive core and enzymatic-sensitive shell.
  • Loading of Nilotinib into the core and Imatinib Mesylate into the shell.
  • In vitro assessment of drug encapsulation efficiency, release kinetics, and cytotoxicity on leukaemic cells.

Main Results:

  • High dual-drug encapsulation efficiency and synchronized release profiles were achieved.
  • The PCL nanosystem demonstrated pH and enzymatic sensitivity.
  • Combinatorial delivery significantly reduced the IC50 of both IM and Nil compared to single agents.
  • The dual-drug nanoparticles showed enhanced therapeutic efficiency at lower doses, preserving drug activity and minimizing resistance.

Conclusions:

  • The developed PCL nanosystem offers a promising platform for combinatorial CML therapy.
  • Synchronized release of IM and Nil from the nanosystem maximizes cytotoxicity and overcomes drug resistance.
  • This approach enhances therapeutic efficiency by precisely delivering multiple drugs to target cells.