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Updated: Apr 20, 2026

Polyelectrolyte Complex for Heparin Binding Domain Osteogenic Growth Factor Delivery

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Published on: August 22, 2016

Functionalized heparin-protamine based self-assembled nanocomplex for efficient anti-angiogenic therapy.

Farzana Alam¹, Taslim A Al-Hilal², Seung Woo Chung²

¹Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea.

Journal of Controlled Release : Official Journal of the Controlled Release Society

|December 3, 2014

Summary

This study introduces a novel nanoparticle system for anti-angiogenesis cancer therapy. The PEG-LHT7/protamine nanocomplex demonstrates improved tumor targeting and inhibits blood vessel growth, offering a promising therapeutic strategy.

Keywords:

Anti-angiogenesis Heparin conjugate Protamine Self-assembled nanocomplex

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Area of Science:

Biomedical Engineering
Nanotechnology
Oncology

Background:

Angiogenesis is crucial for cancer growth and a therapeutic target.
Current anti-angiogenic drugs have limitations, including transient efficacy and side effects.
Nanoparticle drug delivery systems offer potential to improve anti-angiogenic therapy.

Purpose of the Study:

To develop a novel polyelectrolyte complex for enhanced anti-angiogenic therapy.
To combine long circulation, passive tumor targeting, and anti-angiogenesis efficacy.
To evaluate the performance of a PEG-LHT7/protamine nanocomplex system.

Main Methods:

Modification of LHT7 with polyethylene glycol (PEG).
Formation of self-assembling PEG-LHT7/protamine nanocomplexes (200nm).
Assessment of nanocomplex stability, dissociation in plasma, circulation time, tumor accumulation, and tumor penetration.

Main Results:

PEG-LHT7/protamine nanocomplex showed stability in buffer and slow dissociation in plasma.
The nanocomplex exhibited a longer mean residence time (15.9h) and increased tumor accumulation compared to free PEG-LHT7.
The nanocomplex successfully diffused and extravasated through the tumor's collagen matrix.

Conclusions:

Functionalized PEG-LHT7/protamine nanocomplexes are effective for anti-angiogenesis therapy.
The developed system demonstrates long circulating, passive targeting, and tumor extravasating abilities.
This approach offers a promising strategy to overcome limitations of conventional anti-angiogenic drugs.