Silica Nanoparticle-Cell Construct for Targeted Platinum Delivery
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Solution Overview
Problem
Current drug delivery systems, such as liposomes and nanoparticles, face challenges in maintaining structural stability under fluid shear stress and effectively targeting tumors, while Neural Stem Cells (NSCs) lack intrinsic anti-tumor efficacy and require enhanced methods for targeted chemotherapeutic delivery.
Innovation Solution
Development of silica nanoparticles conjugated with platinum anti-cancer agents through oxygen or nitrogen linkers, combined with NSCs, to create a nanoparticle-cell construct for targeted and selective tumor killing, utilizing delayed drug release mechanisms for enhanced therapeutic efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If liposomes are used for drug delivery, then high drug loadings are achieved, but structural stability under fluid shear stress is undesirably low
Solution Approach 1:
The invention uses composite silica nanoparticles that combine the high drug loading capacity of porous materials with the structural stability of inorganic silica framework, resolving the contradiction between soft liposome flexibility and structural integrity under shear stress
2Ease of operation
If Neural Stem Cells are used for targeted delivery, then tumor tropic properties are achieved, but intrinsic anti-tumor efficacy is absent
Solution Approach 1:
The invention merges the targeting capability of Neural Stem Cells with the anti-tumor efficacy of platinum drugs by covalently conjugating the drug to the cell surface, creating a hybrid system that combines both functions in a single delivery vehicle
3Object-affected harmful factors
If NSAIDs are used to reduce inflammation, then inflammatory response is reduced, but tumor growth may be promoted
Solution Approach 1:
The invention uses silica nanoparticles as an intermediary carrier that delivers platinum drugs directly to tumor sites, bypassing the systemic anti-inflammatory effects of NSAIDs that promote tumor growth, while still allowing localized control of inflammation at the tumor microenvironment
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 silica nanoparticle-cell constructs demonstrate superior accumulation and retention of platinum agents at tumor sites, achieving effective tumor killing and overcoming stability and targeting limitations of existing systems.
Implementation Method 1
the platinum anti-cancer agent is conjugated to silica directly, though an oxygen linker, or through a nitrogen linker
Implementation Method 2
The silica nanoparticle-cell constructs demonstrate superior accumulation and retention of platinum agents at tumor sites
Implementation Method 3
achieving effective tumor killing
Data Source
AI summary
The disclosure provides, inter alia, compositions including cell-nanoparticle constructs and drug loaded nanoparticles, and methods for their use in the treatment of cancer. Also provided are unmodified cisplatin molecules encapsulated by silica nanoparticles, and their use in the treatment of cancer.