Mass Spectrometry Cytotoxicity Screening via Cell Coverage Mapping
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Solution Overview
Problem
Current methods for determining cytotoxic effects on animal cells are time-consuming, complex, and require specialized equipment, making them unsuitable for routine laboratories, especially when detecting cytotoxic factors such as bacteria, fungi, or viruses, which are difficult to detect using existing biomarkers and require expensive high-spatial-resolution MALDI MSI systems.
Innovation Solution
A method using spatial resolution mass spectrometry to analyze cytotoxic effects by providing a mass spectrometric sample with animal cells and a potential cytotoxic factor on a sample spot, incubating, removing residual liquid, and recording spatially resolved mass spectra to determine cell-specific signatures, coverage, and proliferation capability, allowing for indirect derivation of cytotoxic effects without needing specific pharmacological biomarkers or expensive equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If phenotypic detection methods are used to determine cytotoxic effects, then detection capability is improved, but time consumption and complexity increase
Solution Approach 1:
The patent replaces traditional optical phenotypic detection methods with mass spectrometry-based detection. Instead of using microscopes or colorimetric assays to monitor cell growth and morphology, the system uses MS to detect cell-specific mass spectral signatures, thereby reducing detection time while maintaining accuracy.
Solution Approach 2:
The patent changes the detection parameter from optical properties (color, morphology) to mass spectral properties. By monitoring changes in mass spectral signatures of cells under cytotoxic treatment, the system achieves rapid quantification of cytotoxic effects without the time-consuming steps of traditional phenotypic methods.
2Measurement precision
If specialized equipment is used for cytotoxicity detection, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes existing MALDI-TOF MS systems, originally designed for microbial identification, capable of cytotoxicity detection by implementing specific software algorithms and data evaluation methods. This multi-functional use of existing equipment eliminates the need for specialized cytotoxicity testing devices while maintaining measurement precision.
Solution Approach 2:
The patent uses mass spectral signatures as a copy or representation of cell state and viability. Instead of directly measuring complex cellular properties, the system analyzes mass spectral patterns that represent cell metabolism and structural integrity, thereby achieving precise measurement through a simplified proxy.
3Reliability
If conventional cytotoxicity assays are used, then detection reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The patent enables mass spectrometers to automatically perform cytotoxicity detection by implementing software that autonomously acquires mass spectral data, processes signals, and calculates cytotoxic effects. The system self-evaluates cell viability based on mass spectral signatures without requiring manual intervention or specialized operational skills.
4Measurement precision
If high-spatial-resolution MALDI MSI systems are used for cytotoxic factor detection, then detection precision is improved, but cost and accessibility worsen
Solution Approach 1:
The patent uses standard MALDI-TOF MS samples and matrices that are inexpensive and readily available, replacing the need for expensive high-spatial-resolution MALDI MSI systems. The method achieves sufficient detection precision using conventional, widely accessible equipment in routine laboratories.
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 method allows for rapid, reliable, and inexpensive detection of cytotoxic effects on animal cells, suitable for routine laboratories, as it uses existing mass spectrometers with software modifications, eliminating the need for specialized equipment and complex procedures, and is applicable to various cytotoxic factors without prior knowledge of their presence or action mechanisms.
Implementation Method 1
a preparation of the sample spot is carried out by a true-to-position application of a matrix to at least the one partial area of the sample spot; spatially resolved mass spectra are recorded at a plurality of measuring positions
Data Source
AI summary
The invention relates to a method for determining the cytotoxic effect of an analytical sample on animal cells, including human cells. The method comprises (a) a sample provision step in which a mass spectrometric sample comprising animal cells, nutrient medium, and the analytical sample potentially having a cytotoxic factor is prepared on at least one sample spot of a mass spectrometric sample support; (b) a cultivation step in which the mass spectrometric sample is incubated on the sample spot of the mass spectrometric sample support in a cultivation device; (c) a liquid removal step in which residual liquid of the mass spectrometric sample is removed from the sample spot; (d) a measuring step in which spatially resolved mass spectra are recorded at a plurality of measuring positions in at least a partial area of the sample spot by means of a spatial resolution mass spectrometer, wherein, when a matrix-based spatial resolution mass spectrometer is used, prior to the recording of the spatially resolved mass spectra in the measuring step, a preparation of the sample spot is carried out in a preceding sample preparation step by the spatially dispersed application of a matrix to at least the one partial area of the sample spot; (e) a first evaluation step in which each spatially resolved mass spectrum is analyzed for the presence of a cell-specific mass spectrometric signature for the animal cells and a cell presence value is assigned to each measuring position; (f) a second evaluation step in which a degree of coverage by animal cells is determined for at least the partial area of the sample spot from the cell presence values of the measuring positions; (g) and/or a third evaluation step in which a proliferation capability is derived from the determined degree of coverage; (h) a fourth evaluation step in which the cytotoxic effect of the analytical sample on the animal cells is derived indirectly or directly from the determined degree of coverage of the second evaluation step, wherein for this purpose the cytotoxic effect of the analytical sample on the animal cells is derived from the result of at least one of the two steps: second evaluation step and/or third evaluation step.