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Updated: Jun 15, 2026

Polymalic Acid-based Nano Biopolymers for Targeting of Multiple Tumor Markers: An Opportunity for Personalized Medicine?
Published on: June 13, 2014
Targeting of drugs and nanoparticles to tumors
Erkki Ruoslahti1, Sangeeta N Bhatia, Michael J Sailor
1Vascular Mapping Center, Sanford-Burnham Medical Research Institute, University of California, Santa Barbara, Santa Barbara, CA 93106, USA. ruoslahti@burnham.org
Abstract:
The various types of cells that comprise the tumor mass all carry molecular markers that are not expressed or are expressed at much lower levels in normal cells. These differentially expressed molecules can be used as docking sites to concentrate drug conjugates and nanoparticles at tumors. Specific markers in tumor vessels are particularly well suited for targeting because molecules at the surface of blood vessels are readily accessible to circulating compounds. The increased concentration of a drug in the site of disease made possible by targeted delivery can be used to increase efficacy, reduce side effects, or achieve some of both. We review the recent advances in this delivery approach with a focus on the use of molecular markers of tumor vasculature as the primary target and nanoparticles as the delivery vehicle.
Insights
Targeted drug delivery utilizes unique tumor cell markers to concentrate therapies. Nanoparticles targeting tumor vasculature offer enhanced efficacy and reduced side effects for cancer treatment.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Oncology
Background:
- Tumor cells express unique molecular markers absent or low in normal cells.
- Tumor vasculature markers are accessible targets for circulating therapeutic agents.
Purpose of the Study:
- To review advances in targeted drug delivery using molecular markers on tumor vasculature.
- To highlight the use of nanoparticles as a delivery vehicle for cancer therapeutics.
Main Methods:
- Review of recent scientific literature on targeted drug delivery systems.
- Focus on nanoparticle-based strategies targeting tumor vasculature markers.
Main Results:
- Differential expression of molecular markers on tumor cells and vasculature enables targeted accumulation of drugs.
- Nanoparticles can effectively target tumor-specific vascular markers.
Conclusions:
- Targeted delivery concentrates drugs at the disease site, improving efficacy and reducing toxicity.
- Nanoparticles targeting tumor vasculature represent a promising approach for enhanced cancer therapy.
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