Biodegradable Linkers for Tunable Drug Release Kinetics
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Solution Overview
Problem
Current drug delivery systems face challenges such as poor solubility, rapid clearance, and toxicity issues, which can be alleviated by using biodegradable linkers for controlled release of bioactive compounds, particularly in polymeric micelles and hydrogels, to achieve targeted and sustained therapeutic effects.
Innovation Solution
Development of biodegradable linkers with specific hydrolytic properties that allow for covalent conjugation of bioactive compounds to polymer matrices, enabling controlled release through hydrolysis under physiological conditions, thereby extending circulation time and enhancing tumor accumulation and therapeutic efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If biodegradable linkers are used for covalent conjugation of bioactive compounds to polymer matrices, then controlled release and prolonged circulation are achieved, but the conjugation stability may be compromised due to hydrolytic degradation
Solution Approach 1:
The patent applies parameter changes by systematically varying the chemical structure of the linker (different backbone compositions, chain lengths, and functional groups) to tune the hydrolysis rate. This allows optimization of the balance between circulation time extension and conjugation stability, achieving controlled release while maintaining sufficient stability during transport.
2Reliability
If covalent coupling of active ingredients to the delivery system is performed, then long circulation times and accumulation in targeted tissue are achieved, but the complexity of the system increases
Solution Approach 1:
The patent applies segmentation by dividing the linker into distinct functional modules: a polymer conjugation module, a bioactive compound coupling module, and a hydrolytically labile intermediate section. This modular design enables systematic optimization of each component's function while simplifying the overall synthesis and characterization process.
3Ease of operation
If hydrolytically sensitive linkers are used for controlled release, then bioactive compounds can be released under physiological conditions, but the premature release may occur before reaching the target site
Solution Approach 1:
The patent applies parameter changes by modifying the hydrolytic sensitivity of the linker through variations in chemical structure, including the type of hydrolytically labile bonds, steric hindrance, and electronic effects. This enables precise tuning of the release kinetics to match the circulation time required for reaching the target tissue while ensuring controlled release upon arrival.
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 use of these linkers results in prolonged blood circulation, increased tumor accumulation, and sustained therapeutic levels, reducing toxicity and improving treatment outcomes for various diseases, including cancer and inflammatory conditions.
Implementation Method 1
biodegradable linkers with specific hydrolytic properties that allow for covalent conjugation of bioactive compounds to polymer matrices, enabling controlled release through hydrolysis under physiological conditions
Data Source
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AI summary
The present invention relates to a particular class of biodegradable linkers, ensuring transiently stable conjugation of building blocks and/or bioactive compounds into drug delivery systems (DDS), such as DDS based on polymeric micelles or hydrogels. In addition, the present invention relates to compounds, comprising said linkers, such compounds preferably being prodrugs. Further, the invention is directed to the use of said linkers, and especially said biodegradable linkers, in a drug delivery system. Moreover, the invention relates to controlled release system comprising a polymer matrix, capable of releasing an active ingredient, wherein the active ingredient is covalently linked to the polymer molecules of the polymer matrix through said linkers, as well as to a method of synthesising these linkers and preparing such controlled release systems.