Cellulosic Paper Stabilization of Nucleic Acids
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Solution Overview
Problem
Nucleic acids, such as HIV RNA, degrade rapidly under high temperatures and humidity, posing challenges for diagnostic and therapeutic applications, especially in rural areas with limited access to sophisticated equipment.
Innovation Solution
A solid matrix comprising a non-dissolvable dry material like cellulosic paper impregnated with a buffer and optional reducing agents or antioxidants, which stabilizes biological samples in a dry state, preventing nucleic acid degradation and allowing for accurate storage and recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If nucleic acids are stored in a dry state on cellulosic paper without buffer, then the storage is simple and easy to transport, but the nucleic acids degrade rapidly under high temperatures and humidity
Solution Approach 1:
A buffer solution is introduced as an intermediary substance between the nucleic acid and the environmental conditions (temperature, humidity). The buffer acts as a chemical mediator that stabilizes the pH and chemical environment, preventing nucleic acid degradation while allowing storage on simple cellulosic paper matrices.
Solution Approach 2:
The chemical parameters of the storage environment are changed by introducing specific buffer components that maintain stable pH and chemical conditions. This transforms the storage system from one that is sensitive to environmental variations to one that maintains consistent chemical parameters despite external conditions.
2Reliability
If buffer is impregnated in the matrix material, then the nucleic acid stability is improved, but the device complexity increases
Solution Approach 1:
The buffer solution is merged with the cellulosic paper matrix through impregnation, combining the stabilizing chemical properties of the buffer with the physical structure and portability of the paper. This integration creates a unified storage medium that maintains nucleic acids without requiring separate buffering systems.
Solution Approach 2:
The cellulosic paper acts as a thin, flexible matrix that can be easily impregnated with buffer solution. This thin-film approach allows buffer incorporation while maintaining the simplicity, portability, and ease of handling characteristics of paper-based storage devices.
3Ease of operation
If denaturants are included in the matrix, then the nucleic acid extraction is facilitated, but the nucleic acid integrity is compromised
Solution Approach 1:
The buffer is pre-impregnated in the matrix in a stable, non-denaturing form that protects nucleic acid integrity during storage. The extraction-facilitating properties are activated only when needed, separating the storage phase (integrity protection) from the extraction phase (ease of recovery).
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 solution effectively stabilizes nucleic acids, maintaining their integrity for extended periods, even under challenging conditions, enabling reliable diagnostic and therapeutic assessments in resource-limited settings.
Implementation Method 1
the solid matrix comprises a matrix material and at least one buffer, wherein: the matrix material is a non-dissolvable dry solid material; the buffer is impregnated in the matrix material in a substantially dry state or a dry state
Implementation Method 2
the solid matrix further comprises at least one reducing agent, wherein the reducing agent is impregnated in the matrix material in a substantially dry state
Implementation Method 3
the solid matrix further comprises at least one antioxidant, wherein the antioxidant is impregnated in the matrix material in a substantially dry state
Data Source
AI summary
The present invention and embodiments thereof relates to compositions and methods for storage, stabilization and preservation of biological samples and/or nucleic acids on a solid matrix. Methods for extracting, collecting, and recovering the biological samples and/or nucleic acids from the solid matrix are also described.