Platinum Cluster Nanoparticles for Targeted ROS Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current cancer treatment methods using reactive oxygen species (ROS) often cause collateral damage to healthy tissues due to the non-specific generation of ROS, and the use of ultraviolet light for activating nanoparticles can exacerbate conditions like melanomas and ocular disorders.
Innovation Solution
Development of nanoparticles comprising a metal oxide and a platinum cluster with a height-to-base ratio greater than 1, which can generate ROS when irradiated with visible light, allowing for targeted ROS delivery to cancer cells while minimizing damage to healthy tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional cancer therapy methods (chemotherapy, radiotherapy, cytokine therapy) are used to generate ROS, then tumor cells are effectively killed, but healthy tissues suffer substantial collateral damage
Solution Approach 1:
The patent applies local quality by functionalizing nanoparticles with tumor-specific targeting ligands (antibodies, peptides, or small molecules) that enable selective accumulation of ROS-generating nanoparticles at the tumor site. This spatial differentiation ensures high ROS concentration is delivered locally to cancer cells while healthy tissues remain unaffected, resolving the contradiction between effective tumor cell killing and minimizing collateral damage
Solution Approach 2:
The patent uses nanoparticles as intermediary carriers that deliver ROS-generating agents (photosensitizers, enzymes, or pro-oxidants) specifically to tumor cells. These nanoparticle intermediaries protect healthy tissues from direct exposure to harmful ROS while facilitating concentrated ROS delivery to the target, thereby achieving effective tumor cell death with minimal healthy tissue damage
2Power
If ultraviolet light is used to activate nanoparticle photosensitizing agents, then ROS production is induced, but UV light promotes cancers and causes eye damage
Solution Approach 1:
The patent applies parameter changes by shifting the activation wavelength from ultraviolet to visible light range. This is achieved by selecting photosensitizing agents with appropriate absorption spectra and engineering nanoparticle compositions that enable visible light activation. The wavelength parameter change eliminates UV-induced harmful effects while maintaining or enhancing ROS generation efficiency through optimized photosensitizer-nanoparticle interactions
Solution Approach 2:
The patent converts the potentially harmful UV activation mechanism into a beneficial visible light activation system. By using photosensitizers that absorb visible light and transfer energy to generate ROS, the system eliminates the carcinogenic and ocular-damaging effects of UV exposure while maintaining effective tumor cell killing. The harmful UV mechanism is replaced with a safer visible light mechanism that achieves the same therapeutic goal without the harmful side effects
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 nanoparticles effectively generate ROS in cancer cells with minimal damage to healthy tissues, avoiding the risks associated with UV light and providing a more targeted and effective cancer treatment option.
Implementation Method 1
irradiating the nanoparticle with radiation having a wavelength greater than about 400 nm
Implementation Method 2
the platinum cluster serves as a co-catalyst in the formation of ROS
Implementation Method 3
the platinum cluster serves as a co-catalyst in the formation of ROS
Implementation Method 4
irradiating the nanoparticle with radiation having a wavelength greater than about 400 nm to generate hydroxyl radicals
Data Source
AI summary
Nanoparticles comprising a metal oxide and a platinum cluster having a height to base ratio greater than 1 and compositions containing the same are disclosed. Methods of using the nanoparticles in producing hydroxyl radicals and in photodynamic therapy, for example, in the treatment of hyperproliferative disease such cancer, are also disclosed.