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Preparation and Characterization of Lipophilic Doxorubicin Pro-drug Micelles
Published on: August 2, 2016
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.
Abstract:
Liposomes are biodegradable and biocompatible self-forming spherical lipid bilayer vesicles. They can encapsulate and deliver one or more hydrophobic and hydrophilic therapeutic agents with poor therapeutic indices to tumor sites. Properties such as lipid bilayer fluidity, charge, size and surface hydration can be modified to extend liposome circulation time in the bloodstream and enhance efficacy. The focus of this review is on ligand-conjugated liposomes and their potential application in tumor-targeted delivery. Ligand-conjugated liposomes are designed to target receptors which are overexpressed on tumor cells to decrease drugs side effects by enhancing their selective delivery to tumor site. Despite the extensive research in this area, no small molecule ligand-conjugated liposome has been approved up to date for cancer therapy.
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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