RNA-Gold Nanoparticle Compositions for Gene Knockdown
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Solution Overview
Problem
Current methods lack effective means to utilize polyvalent particles for loading and transporting RNA across cell membranes, and RNA is chemically unstable, making specific gene inhibition challenging.
Innovation Solution
Gold nanoparticles functionalized with RNA oligonucleotides that take advantage of ensemble properties from surface functionalization, enhancing stability and efficacy, and are designed to enter cells without transfection agents, resisting degradation and improving knockdown activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RNA is used for gene inhibition, then gene knockdown activity is achieved, but RNA is chemically unstable and degrades quickly
Solution Approach 1:
The patent applies composite materials by combining RNA oligonucleotides with gold nanoparticles to create a hybrid structure. The RNA provides gene-targeting functionality while the gold nanoparticle core provides chemical stability and resistance to degradation. This composite approach allows the RNA to maintain its gene knockdown activity while the nanoparticle protects it from chemical instability and rapid degradation in biological environments.
2Ease of operation
If transfection agents are used to deliver RNA into cells, then cellular uptake is improved, but RNA degradation increases and efficacy decreases
Solution Approach 1:
The gold nanoparticle serves as an intermediary carrier that enables cellular uptake without requiring traditional transfection agents. The nanoparticle's unique properties allow it to penetrate cell membranes directly, while its protective surface prevents RNA degradation. This intermediary approach eliminates the need for transfection agents that would otherwise compromise RNA integrity and reduce knockdown efficacy.
3Quantity of substance
If polyvalent particles are used for RNA transport, then loading capacity is increased, but effective methods for transporting across cell membranes are lacking
Solution Approach 1:
The patent utilizes parameter changes by exploiting the unique physical and chemical properties of gold nanoparticles, particularly their size, surface area, and surface chemistry. These parameter changes enable the polyvalent particles to both load high quantities of RNA through surface functionalization and transport across cell membranes through their nanoscale dimensions and tunable surface properties.
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 RNA-nanoparticle compositions demonstrate enhanced stability and efficacy in gene regulation, with increased half-life and cellular uptake, allowing for efficient target gene knockdown and potential therapeutic applications.
Implementation Method 1
the RNA polynucleotide has a sequence that forms a duplex under conditions appropriate to form the duplex
Implementation Method 2
hybridization of the domain of the duplex to the sequence in the target polynucleotide
Implementation Method 3
Gold nanoparticles functionalized with RNA oligonucleotides that take advantage of ensemble properties from surface functionalization
Implementation Method 4
designed to enter cells without transfection agents, resisting degradation and improving knockdown activity
Implementation Method 5
Biochemical analyses suggest that dsRNA introduced into the cytoplasm of a cell is first processed into RNA fragments 21-25 nucleotides long. It has been shown in in vitro studies that these dsRNAs, termed small interfering RNAs (siRNA) are generated at least in one mechanism by the RNAse III-like enzyme Dicer
Implementation Method 6
RNA interference (RNAi) is a phenomenon wherein double-stranded RNA (dsRNA), when present in a cell, inhibits expression of a gene that has a sufficiently complementary sequence to a single strand in the double-stranded RNA. Inhibition of gene expression is caused by degradation of messenger RNA (mRNA) transcribed from the target gene
Implementation Method 7
Argonaute contributes 'Slicer' activity to RISC, providing the catalytic engine for RNAi
Data Source
AI summary
The present invention concerns nanoparticles functionalized with duplex RNA for a variety of uses, including but not limited to gene regulation. More specifically, the disclosure provides a new strategy for conjugating RNA to a nanoparticle to achieve increased stability and activity.