Block Copolymer Drug Delivery via Self-Assembly
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Solution Overview
Problem
Water insoluble drugs like paclitaxel and GANT58 face low in vivo bioavailability due to their insolubility, and existing delivery methods result in low drug loading and immune response stimulation.
Innovation Solution
Development of block copolymers with a hydrophilic first block and a more hydrophobic second block, featuring recurring units that facilitate high drug loading and efficient delivery through self-assembly into particles, leveraging π-π interactions and hydrogen bonding for improved drug-polymer interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water insoluble drugs are used to treat diseases, then therapeutic efficacy is improved, but in vivo bioavailability decreases due to insolubility
Solution Approach 1:
The patent uses block copolymers as intermediary carriers to solubilize water-insoluble drugs. The copolymer structure with hydrophobic blocks (for drug loading) and hydrophilic blocks (for water solubility) acts as a mediator between the insoluble drug and aqueous biological environment, enabling high drug loading while maintaining bioavailability through enhanced solubility and controlled release
2Ease of operation
If existing delivery carriers are used for water insoluble drugs, then delivery is improved, but drug loading capacity decreases
Solution Approach 1:
The patent employs block copolymers composed of different polymer blocks with complementary properties - hydrophobic blocks for high drug loading capacity and hydrophilic blocks for delivery efficiency. This composite material structure allows simultaneous achievement of high drug loading (up to 90 wt%) and effective delivery, resolving the contradiction between loading capacity and delivery performance
3Ease of operation
If existing delivery carriers are used for water insoluble drugs, then delivery is improved, but immune response stimulation increases
Solution Approach 1:
The patent modifies the physical and chemical parameters of the delivery system by using biocompatible block copolymers with specific molecular weights, block ratios, and functional groups. These parameter optimizations reduce immunogenicity while maintaining delivery efficiency, allowing the system to evade immune detection and clearance compared to conventional carriers
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The block copolymers achieve high drug loading and efficient delivery, with enhanced stability and controlled release, allowing for higher maximum tolerated doses and improved therapeutic outcomes, particularly in cancer treatment.
Implementation Method 1
block copolymers with a hydrophilic first block and a more hydrophobic second block, featuring recurring units that facilitate high drug loading and efficient delivery through self-assembly into particles
Implementation Method 2
leveraging π-π interactions and hydrogen bonding for improved drug-polymer interactions
Implementation Method 3
leveraging π-π interactions and hydrogen bonding for improved drug-polymer interactions
Data Source
AI summary
Disclosed herein arm block copolymers that have beneficial drug loading properties. An example block copolymer includes a first block that is hydrophilic and a second block having pendant groups that can non-covalently interact with a drug. Also disclosed are particles including self-assembled block copolymers and a drug; and methods of treating diseases.