Homogenization Buffer for Oligonucleotide Quantitation
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Solution Overview
Problem
Current methods lack adequate buffer chemistries for processing multiple tissue types to effectively evaluate oligonucleotide pharmacokinetics, toxicokinetics, and tissue distribution, which is essential for drug development.
Innovation Solution
A buffer composition with optimized pH and organic/aqueous ratio, containing ammonium acetate and proteinase K, is used for tissue homogenization, allowing for the analysis of oligonucleotides across various tissue matrices by eliminating matrix effects and enabling efficient quantitation of oligonucleotides like TLR9 agonists.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a plasma assay is used to analyze tissue homogenates, then the same assay can be used for multiple biological matrices, but adequate buffer chemistries for processing multiple tissue types have not been established
Solution Approach 1:
The patent optimizes buffer chemistry parameters (pH 3.0-6.0, ammonium acetate concentration 5-20 mM, proteinase K quantity 50-200 μg/mL) to create a homogenization buffer that eliminates matrix effects and enables consistent oligonucleotide quantitation across multiple tissue types using a single plasma assay
Solution Approach 2:
The homogenization buffer acts as an intermediary medium between the tissue matrix and the plasma assay, normalizing the chemical environment to eliminate matrix effects and allowing plasma calibration standards to accurately represent tissue concentrations
2Measurement precision
If traditional tissue assays are used, then tissue-specific processing can be performed, but the complexity increases and efficiency decreases
Solution Approach 1:
The patent develops a universal homogenization buffer system that works across multiple tissue types (brain, liver, lung, spleen, thymus, lymphoid tissue) and animal models, eliminating the need for tissue-specific assay protocols and enabling single-assay evaluation of multiple biological matrices
3Measurement precision
If matrix-matched QC samples are used for tissue, then accuracy improves, but the complexity of sample preparation increases
Solution Approach 1:
The patent optimizes buffer parameters (pH 3.0-6.0, ammonium acetate 5-20 mM) to create a homogenization buffer that naturally eliminates matrix effects, allowing plasma calibration standards to accurately represent tissue concentrations without requiring complex tissue-matched QC samples
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
This approach provides accurate and precise quantitation of oligonucleotides in multiple tissue samples, improving the efficiency of drug tissue distribution studies by matrix-matching tissue and plasma samples, thus facilitating drug discovery programs.
Implementation Method 1
adding a quantity of a reference standard oligonucleotide to the tissue homogenate solution to create a homogenate/plasma/standard solution
Implementation Method 2
adding a quantity of a phenol/chloroform/isoamyl alcohol to the homogenate/plasma/standard solution; employing centrifugal force to separate a supernatant from the homogenate/plasma/standard solution
Implementation Method 3
employing centrifugal force to separate a supernatant from the homogenate/plasma/standard solution
Data Source
AI summary
Embodiments of the present invention provide for an optimized tissue homogenization buffer composition and a method of using an optimized tissue homogenization buffer for efficient quantitation of a therapeutic oligonucleotide in multiple tissues. The exemplary method comprising: mixing the tissue with a homogenization buffer composition to create a tissue homogenate; adding the tissue homogenate to a quantity of oligonucleotide-free plasma to create a tissue homogenate solution; adding a quantity of a reference standard oligonucleotide to the tissue homogenate solution to create a homogenate/plasma/standard solution; adding a quantity of a phenol/chloroform/isoamyl alcohol to the homogenate/plasma/standard solution; employing centrifugal force to separate a supernatant from the homogenate/plasma/standard solution; and analyzing the supernatant for a concentration of the oligonucleotide.