Lipid Particle Abundance Analysis for Delivery Quality Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for evaluating the quality of lipid particles used for delivering substances to cells rely on fill ratios, which have a low correlation with delivery efficiency, leading to inconsistent and inaccurate quality control.
Innovation Solution
An analysis method that determines the abundance ratio of lipid particles containing an objective substance by measuring scattered light and fluorescence, providing a direct and accurate assessment of particle quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fill ratio is used to evaluate lipid particle quality, then quality control can be performed, but the evaluation has low correlation with delivery efficiency leading to inaccurate quality control
Solution Approach 1:
The patent uses fluorescence labeling to create optical signals that change based on the presence of objective substances. Fluorescently labeled antibodies or molecules bind to target antigens on lipid particles, producing detectable fluorescence signals that directly indicate the presence and quantity of encapsulated substances, providing accurate quality evaluation correlated with delivery efficiency.
Solution Approach 2:
The patent replaces mechanical/chemical measurement methods (fill ratio calculation based on substance concentration) with optical detection methods (flow cytometry, fluorescence-activated cell sorting). This substitution enables direct visualization and quantification of individual lipid particles containing objective substances, significantly improving measurement precision and reliability of quality control.
2Ease of manufacture
If fill ratio measurement is performed by measuring remaining objective substances in solution, then quality control is possible, but the method is indirect and inconsistent
Solution Approach 1:
The patent introduces fluorescent labels as intermediary substances that bind to objective substances or target antigens on lipid particles. These fluorescent intermediaries serve as detectable proxies that directly indicate the presence of encapsulated substances, enabling precise and consistent measurement without relying on indirect calculations from remaining solution concentrations.
Solution Approach 2:
The patent employs fluorescence emission as an optical indicator to directly detect and quantify lipid particles containing objective substances. The fluorescence signal provides real-time, particle-by-particle information about encapsulation status, enabling accurate and consistent quality control measurements that correlate with actual delivery capability.
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 abundance ratio method offers a more reliable index for evaluating lipid particle quality, ensuring consistent and stable delivery efficiency of substances to cells.
Implementation Method 1
a first substance which has lipid membrane permeability, binds to the objective substance
Implementation Method 2
includes a dye that generates fluorescence, irradiating step of irradiating mixture obtained from the mixing with light that excites to generate fluorescence
Implementation Method 3
a first measuring step of the number of the plurality of lipid particles in the lipid particle group by detecting scattered light obtained from the mixture by the irradiating with the light
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
According to one embodiment, an analysis method is for determining an abundance ratio of first lipid particles containing an objective substance in a lipid particle group. The analysis method comprising irradiating a solution including the lipid particle group with light, measuring at least two of the total number of the plurality of lipid particles, the number of the first lipid particles, and the number of second lipid particles not containing the objective substance in the solution by detecting scattered light, and calculating an abundance ratio of the first lipid particles.