Polymer-Coated Gold Nanoparticle-Aptamer Nanoconstruct for ROS Scavenging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional gold nanoparticle-aptamer hybrid materials do not fully utilize the targeting capability of aptamers and lack stability in the body, and existing treatments for inflammatory diseases like cancer and macular degeneration are inadequate in addressing reactive oxygen species and cytokine overexpression.
Innovation Solution
A polymer-coated gold nanoparticle-aptamer nanoconstruct is developed, where a polymerized phenylboronic acid coating on gold nanoparticles is sensitive to reactive oxygen species, allowing the aptamer to capture disease-related factors like TNF-α and VEGF after the coating is removed, thereby scavenging reactive oxygen species and inhibiting these factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a polymer coating is applied to gold nanoparticles to enhance stability, then stability is improved, but the aptamer's targeting capability is blocked
Solution Approach 1:
The polymer coating is applied in advance to protect the aptamer during circulation, and the coating is designed to be removed only when the nanoconstruct reaches the target site with high ROS concentration, thus preliminarily protecting then activating the targeting capability
Solution Approach 2:
The polymer coating transitions from a stable protective layer to a removed state in response to ROS, making the system dynamic rather than static. The coating's stability changes based on the environmental ROS concentration, allowing the aptamer to switch between protected and active states
2Adaptability or versatility
If the aptamer is used to capture target materials, then targeting capability is improved, but stability in the body deteriorates
Solution Approach 1:
The polymer coating acts as an intermediary protective layer between the aptamer and the body environment, shielding the aptamer from degradation while allowing it to maintain its targeting capability when the coating is removed
3Ease of manufacture
If conventional gold nanoparticle-aptamer hybrid materials are used, then ease of synthesis is improved, but functionality utilization deteriorates
Solution Approach 1:
The invention creates a composite material system combining gold nanoparticles, aptamers, and polymer coatings with ROS sensitivity. This composite structure maintains ease of synthesis while adding multiple functions: ROS scavenging, stable delivery, and targeted capture, thus utilizing functionality without sacrificing manufacturability
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 nanoconstruct effectively scavenges reactive oxygen species and captures TNF-α and VEGF, demonstrating therapeutic potential for inflammatory diseases and cancer by enhancing aptamer stability and targeting capability, with no cytotoxicity and hematological toxicity, and showing significant anti-inflammatory effects in cellular and mouse models.
Implementation Method 1
the polymer coating is removed by scavenging reactive oxygen species only in the presence of reactive oxygen species
Implementation Method 2
the aptamer captures disease-related factors after the polymer coating is removed
Data Source
AI summary
The present disclosure relates to a polymer-coated gold nanoparticle-aptamer nanoconstruct having reactive oxygen species sensitivity and capable of treating inflammatory diseases through reactive oxygen species scavenge and TNF-α capture.