Oxocarbonamide Peptide Nucleic Acids for miRNA Detection

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Solution Overview

Problem

Current methods for detecting and analyzing microRNAs (miRNAs) and other small non-coding RNAs are limited by low sensitivity and specificity, requiring large amounts of RNA and being cumbersome, especially when dealing with limited cell or tissue samples, and existing DNA probes face challenges in efficiently hybridizing with rare miRNAs.

Innovation Solution

Development of oxocarbonamide peptide nucleic acids (OxoPNAs) that comprise nucleobases linked to an oxocarbon acid amide modified peptide backbone, offering increased stability, sensitivity, and specificity for hybridization with DNA and RNA strands, allowing for more efficient detection and analysis of miRNAs and other non-coding RNAs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional DNA probes are used for detecting miRNAs, then the detection method is simple and well-established, but the sensitivity and specificity are insufficient for detecting low-abundance miRNA targets

Engineering Contradiction:

Improvedetection sensitivity and specificityVSAvoidprobe structure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies composite materials by combining the peptide backbone of PNA with nucleobase ligands to create oxocarbonamide peptide nucleic acids. This composite structure integrates the stability of peptide bonds with the specific binding capability of nucleobases, achieving both high detection sensitivity and structural innovation to resolve the contradiction between measurement precision and device complexity

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the chemical parameters of the probe by replacing the traditional DNA phosphate backbone with oxocarbonamide-modified peptide bonds. This parameter change in the probe's chemical structure enhances binding affinity and stability, thereby improving detection sensitivity and specificity for low-abundance miRNA targets

Inventive Principle:

Principle #35Parameter changes

2Productivity

If traditional gel-based assays are used for miRNA detection, then the methodology is established, but the throughput is low and large amounts of RNA are required

Engineering Contradiction:

Improvedetection throughputVSAvoidamount of RNA required

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent replaces mechanical gel-based separation systems with a chemical hybridization-based detection system using oxocarbonamide PNAs. This substitution eliminates the need for gel electrophoresis and extensive RNA processing, thereby increasing throughput and reducing the quantity of RNA required for detection

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If DNA probes are used for hybridization with miRNAs, then the probes are easy to synthesize, but the hybridization efficiency with rare miRNAs is insufficient

Engineering Contradiction:

Improvehybridization efficiencyVSAvoidprobe synthesis difficulty

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent modifies the chemical parameters of the probe backbone by introducing oxocarbonamide groups, which enhance hybridization efficiency through improved binding affinity and stability. Despite this chemical modification, the probes remain synthesizable through standard peptide synthesis methods, maintaining ease of manufacture while achieving reliable hybridization with rare miRNAs

Inventive Principle:

Principle #35Parameter changes

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

Oxocarbonamide peptide nucleic acids provide enhanced sensitivity and specificity for detecting miRNAs and other small RNAs, overcoming the limitations of traditional DNA probes by enabling more accurate and efficient hybridization, even with low-abundance targets, and are suitable for diagnostic and therapeutic applications.

Implementation Method 1

nucleic acid probes wherein naturally occurring nucleobases or other nucleobase-binding moieties are covalently bound to an oxocarbonamide containing peptide backbone... hybridizing compositions and methods

Methodology Applied

Scientific EffectHybridization:

Data Source

PatentUS8324359B1Oxocarbonamide peptide nucleic acids and methods of using same

Publication Date: 2012.12.04 LUMINEX CORP

AI summary

The present invention concerns oxocarbonamide peptide nucleic acids (OxoPNAs). OxoPNAs provide increased stability, sensitivity, and specificity as compared to their natural DNA and RNA counterparts. The OxoPNA molecules of the present invention may be employed in a wide range of applications, particularly in applications involving hybridization. For example, OxoPNA probes may be employed for the detection and functional analysis of nucleic acid molecules, including miRNAs and other non-coding RNAs.