Liposomal drug delivery systems for targeted cancer therapy: is active targeting the best choice?

Shaghayegh Fathi1, Adegboyega K Oyelere1

  • 1School of Chemistry & Biochemistry, Parker H. Petit Institute for Bioengineering & Bioscience, Georgia Institute of Technology, Atlanta, GA 30332-0400, USA.

Insights

Ligand-conjugated liposomes offer targeted cancer therapy by delivering drugs to tumor sites. While promising for enhanced efficacy and reduced side effects, no small molecule versions are approved yet.

Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Drug Delivery

Background:

  • Liposomes are self-forming lipid vesicles capable of encapsulating diverse therapeutic agents.
  • Key properties like size, charge, and fluidity can be optimized for extended circulation and efficacy.
  • Tumor-targeted delivery aims to improve drug efficacy and minimize systemic toxicity.

Purpose of the Study:

  • To review the application of ligand-conjugated liposomes for tumor-targeted drug delivery.
  • To discuss the design principles and potential of these targeted liposomes in cancer therapy.

Main Methods:

  • Review of existing literature on ligand-conjugated liposomes for cancer therapy.
  • Analysis of strategies for modifying liposome properties for enhanced targeting and efficacy.
  • Examination of receptor-mediated targeting mechanisms on tumor cells.

Main Results:

  • Ligand conjugation enables targeted delivery of therapeutic agents to tumors by interacting with overexpressed receptors.
  • Optimized liposome characteristics can prolong circulation time and improve drug accumulation at tumor sites.
  • Despite significant research, no small molecule ligand-conjugated liposomes have received regulatory approval for cancer treatment.

Conclusions:

  • Ligand-conjugated liposomes represent a promising strategy for enhancing the selectivity and efficacy of cancer therapies.
  • Further research and development are needed to overcome challenges and achieve clinical approval for these advanced drug delivery systems.

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