Self-assembled drug-loading system for cancer therapy
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Solution Overview
Problem
Current methods for preparing photosensitizer and chemotherapeutic drug formulations for combination therapy are complex, involving copolymers and nanoparticles, which complicate the drug-loading process and product quality control, making clinical transformation difficult.
Innovation Solution
A self-assembled drug-loading system comprising a hydrophilic phototherapeutic drug and a hydrophobic chemotherapeutic drug, forming a water-soluble complex or nanoparticles through direct interaction without the need for surfactants or polymers, with a molar ratio of 2:1 to 1:10, utilizing photosensitizers like indocyanine green and chemotherapeutic drugs like camptothecin or taxanes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If copolymers and nanoparticles are used to prepare photosensitizer and chemotherapeutic drug formulations, then the stability and circulation time of the drugs are improved, but the drug-loading process and product quality control become complex
Solution Approach 1:
The patent divides the complex copolymer system into separate functional components: a simple nanoparticle carrier and distinct photosensitizer/chemotherapeutic drug molecules. This segmentation allows each component to be optimized independently while simplifying the overall preparation process and quality control
Solution Approach 2:
The patent extracts and eliminates the complex copolymer structure from the formulation, retaining only the essential nanoparticle carrier function. This extraction simplifies the drug-loading process while maintaining the stability and circulation time benefits through alternative nanoparticle design
2Reliability
If photosensitizers are used at high concentrations to enhance photodynamic therapy effects, then the therapeutic efficacy is improved, but the quenching of photosensitizers increases
Solution Approach 1:
The patent creates local high-concentration zones of photosensitizers within the nanoparticle structure, where they are spatially separated to prevent intermolecular quenching. This local organization maintains high therapeutic efficacy while minimizing energy loss through quenching
Solution Approach 2:
The patent transitions from two-dimensional planar photosensitizer arrangements to three-dimensional nanoparticle-organized structures, enabling better spatial distribution and reduced quenching while maintaining high local concentrations for effective therapy
3Reliability
If hydrophobic chemotherapeutic drugs are used to achieve potent anticancer effects, then the therapeutic efficacy is improved, but the bioavailability and solubility are reduced
Solution Approach 1:
The patent introduces a nanoparticle carrier as an intermediary between the hydrophobic chemotherapeutic drug and the aqueous biological environment. This mediator enables the hydrophobic drug to achieve high bioavailability and solubility while maintaining its potent anticancer effects
Solution Approach 2:
The patent creates a composite nanoparticle system combining hydrophobic chemotherapeutic drugs with hydrophilic nanoparticle materials, achieving both the potent anticancer effects of hydrophobic drugs and the improved bioavailability of hydrophilic 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
This approach enhances the photothermal and photodynamic therapy effects by reducing quenching of photosensitizers, improves bioavailability, and simplifies the drug-loading process, achieving significant synergistic effects in combination therapy with improved efficacy for treating various cancers.
Implementation Method 1
a self-assembled drug-loading system, comprising a hydrophilic phototherapeutic drug and a hydrophobic chemotherapeutic drug
Implementation Method 2
Photodynamic therapy (PDT) utilizes certain dyes (photosensitizers) that can produce superoxide radicals or heat upon light absorption to kill tumor cells
Implementation Method 3
Its maximum absorption wavelength is around 800 nm, which has a good tissue penetration depth
Data Source
AI summary
Disclosed are a self-assembled drug-loading system containing a hydrophilic phototherapeutic drug and a hydrophobic chemotherapeutic drug, a preparation method therefor and the use thereof for preparing an anti-tumor drug. The self-assembled drug-loading system is a water-soluble complex or water-dispersible nanoparticles formed by means of π-π interaction or hydrophobic interaction between the phototherapeutic drug and the chemotherapeutic drug, wherein the molar ratio of the phototherapeutic drug to the chemotherapeutic drug is 2:1 to 1:10.