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Polymalic Acid-based Nano Biopolymers for Targeting of Multiple Tumor Markers: An Opportunity for Personalized Medicine?

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Reticuloendothelial System Pre-Block Strategy to Improve Tumor Targeting Efficacy for Hyaluronic Acid Related Drug

Fulei Liu, Lingfei Han, Xiaoxian Huang

Journal of Biomedical Nanotechnology

|July 26, 2018

Summary

A novel pre-blocking strategy using hyaluronic acid (HA)-coated liposomes effectively saturates the reticuloendothelial system (RES). This improves tumor targeting drug delivery systems (TDDS) by reducing rapid clearance and enhancing drug accumulation in tumors.

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Area of Science:

Biomedical Engineering
Drug Delivery
Nanotechnology

Background:

Hyaluronic acid (HA) is utilized in tumor targeting drug delivery systems (TDDS) due to its biocompatibility and tumor cell receptor expression.
Rapid clearance by the reticuloendothelial system (RES) limits the efficacy of HA-based TDDS.

Purpose of the Study:

To develop a strategy to overcome RES clearance and enhance tumor targeting efficiency for HA-related TDDS.
To investigate the use of HA-coated blank liposomes as a pre-blocking formulation to saturate RES receptors.

Main Methods:

Optimization of HA molecular weight and surface density, dosing intervals, and pre-block formulation concentration.
In vitro cellular uptake studies using macrophages and 4T1 tumor cell lines.
In vivo validation of the optimized pre-block strategy.

Main Results:

The optimized pre-block formulation effectively saturated RES receptors.
RES clearance of HA-related TDDS was significantly reduced.
Tumor targeting efficiency of HA-related TDDS was substantially improved.

Conclusions:

Selective pre-blocking of RES HA receptors with HA-coated liposomes is a viable strategy to enhance TDDS efficacy.
This approach offers a promising method to improve drug delivery to tumors by mitigating RES-mediated clearance.