Porous Block High Throughput Screening Platform
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Solution Overview
Problem
Existing multi-well plate formats for high-throughput screening face limitations in efficiently and precisely testing large numbers of compounds due to fluid handling issues, such as low working volumes, chemical volatility, solvent evaporation, and high statistical variations, which undermine precision and reliability.
Innovation Solution
A porous block apparatus with planar top and bottom surfaces, featuring cell adhesive and dis-adhesive regions, and sites for loading sample compounds, allows for localized interaction and diffusion of compounds through the matrix, optimizing assay conditions and reducing inter-sample variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-well plate formats are used for high-throughput screening, then large numbers of compounds can be tested in parallel, but fluid handling issues arise including low working volumes, chemical volatility, solvent evaporation, and high statistical variations
Solution Approach 1:
The invention divides the assay system into separate functional zones: a bottom surface for compound loading and a top surface for cell interaction, separated by a porous matrix. This segmentation allows independent optimization of compound deposition (bottom) and cell-based assays (top), eliminating fluid handling issues in multi-well formats while maintaining high-throughput capability through parallel processing of multiple compounds
Solution Approach 2:
The invention transitions from traditional two-dimensional multi-well plate formats to a three-dimensional porous matrix structure. Compounds are loaded onto the bottom surface, diffuse through the porous matrix in the vertical dimension, and interact with cells on the top surface. This dimensional change increases working volume and reduces evaporation while maintaining high compound throughput
2Productivity
If low working volumes are used in multi-well plates to increase throughput, then more compounds can be screened, but chemical volatility and solvent evaporation increase
Solution Approach 1:
The porous matrix structure counteracts the harmful effects of low working volume by providing a physical barrier that reduces evaporation surface area and retains compounds through capillary action. The matrix absorbs and holds compounds during diffusion, preventing volatility losses while maintaining the small volume format needed for high throughput
3Extent of automation
If standardized multi-well plate formats are used, then automated fluid dispensing can be implemented, but inter-sample statistical variations increase
Solution Approach 1:
The porous matrix acts as an intermediary between compound loading and cell interaction, standardizing the diffusion process across all samples. This mediator ensures uniform compound delivery to cells, reducing inter-sample variations while allowing automated dispensing systems to load compounds onto the bottom surface in a high-throughput manner
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 enhances the precision and reliability of biological assays by minimizing fluid handling issues and ensuring consistent interaction between compounds and cells, leading to more predictable and reproducible results in high-throughput screening.
Implementation Method 1
localized interaction and diffusion of compounds through the matrix
Implementation Method 2
cell adhesive regions and cell dis-adhesive regions
Data Source
AI summary
The present invention relates to an apparatus for testing multiple sample compounds for their biological effect comprising a porous block having substantially planar top and bottom surfaces. The top surface comprises a plurality of cell adhesive regions and cell dis-adhesive regions and the bottom surface provides multiple sites to load the sample compounds. These sites are located opposite from the cell adhesive regions on the top surface of the porous block. In certain embodiments, the invention further comprises at least one dissolvable layer which provides multiple sites to load the sample compounds.