Nucleic Acid Transfer Using RNAi-Mediated Uptake Enhancement

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Solution Overview

Problem

Existing nucleic acid delivery systems, such as cationic lipids and viral vectors, are limited by high preparation costs and suboptimal efficacy, necessitating improvements in nucleic acid transfer for research and therapeutic applications.

Innovation Solution

Combination treatment with RNAi molecules and compounds, such as spermine, roscovitine, and hydrocortisone, prior to or concurrent with nucleic acid delivery, to enhance nucleic acid uptake into eukaryotic cells.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cationic lipids or viral vectors are used for nucleic acid delivery, then nucleic acid transfer can be achieved, but preparation costs are high and efficacy is suboptimal

Engineering Contradiction:

Improvenucleic acid delivery efficacyVSAvoidpreparation cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the chemical parameters of the delivery system by using cationic polymers with specific molecular weights and charge densities, combined with RNAi molecules to modulate cellular uptake parameters. This approach achieves high delivery efficacy while using cost-effective materials compared to viral vectors.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates composite nucleic acid delivery vehicles by combining cationic polymers with RNAi molecules and target cell-binding ligands. This composite structure integrates multiple functions (condensation, cellular uptake enhancement, and cell-specific targeting) into a single delivery system that is both effective and cost-efficient.

Inventive Principle:

Principle #40Composite materials

2Productivity

If conventional nucleic acid delivery vehicles are used, then gene transfer can be performed, but uptake efficiency into eukaryotic cells is insufficient

Engineering Contradiction:

Improvenucleic acid uptake efficiencyVSAvoiddelivery performance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-treating cells with RNAi molecules to knock down endogenous proteins that inhibit nucleic acid uptake. This preparatory step removes cellular barriers before delivering the nucleic acid, significantly enhancing uptake efficiency and overall delivery performance.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention uses RNAi molecules as intermediaries to mediate between the delivery vehicle and cellular uptake mechanisms. By selectively silencing inhibitory proteins, the RNAi molecules facilitate more efficient nucleic acid internalization without directly interacting with the delivery vehicle structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250340879A1Compositions and methods for nucleic acid transfer

Publication Date: 2025.11.06 CHILDRENS HOSPITAL MEDICAL CENT CINCINNATI

AI summary

Disclosed are methods for the enhancement of nucleic acid delivery systems. The methods may employ treatment with a compound and/or an RNAi molecule in combination with a nucleic acid to improve nucleic acid uptake into a cell. In particular, the disclosed methods may be useful for improved gene therapy techniques.