Fibrin Composition for In Vitro Assay Replication
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Solution Overview
Problem
Current in vitro assays lack the ability to efficiently reproduce the in vivo configurations of fibrin and predict the functional activity of agents that bind to fibrin, as they fail to replicate the biochemical properties and interactions of fibrin with other molecules.
Innovation Solution
Development of a fibrin composition that displays high affinity binding to fibrin receptors and activates cell-signaling systems comparable to those observed in vivo, allowing for the creation of in vitro assays that mimic in vivo conditions, enabling the screening of test agents that modulate cell activation and signaling pathways mediated by fibrin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional in vitro assays are used, then the assay simplicity is maintained, but the ability to reproduce in vivo fibrin configurations and predict functional activity is lost
Solution Approach 1:
The patent changes the physical and chemical parameters of the fibrin composition by immobilizing fibrin on solid supports and controlling its concentration (e.g., 1-100 μg/mL), thereby recreating in vivo-like conditions in vitro. This allows the assay to predict functional activity while maintaining a manageable assay format.
Solution Approach 2:
The patent creates a simplified copy of the in vivo fibrin environment by using immobilized fibrin compositions that replicate the key biochemical properties and interactions without requiring the full complexity of in vivo systems. This copying approach enables reliable prediction of functional activity in a controlled in vitro setting.
2Stability of the object's composition
If fibrin is immobilized on substrates to reproduce in vivo configurations, then the biochemical properties are improved, but the difficulty of detecting and measuring functional activity increases
Solution Approach 1:
The patent uses cell-based assays as intermediaries to detect and measure the functional activity of immobilized fibrin. The cells serve as a bridge between the immobilized fibrin and the measurement system, translating the stable fibrin configuration into measurable cellular responses such as adhesion, activation, or signaling events.
Solution Approach 2:
The patent employs colorimetric or fluorescent indicators that change color or fluorescence intensity in response to cellular activation by immobilized fibrin. This allows the stable fibrin configuration to be measured through optical changes that are easy to detect and quantify.
3Force
If high affinity binding to fibrin receptors is achieved, then the cell activation capability is improved, but the specificity requirements for test agents increase
Solution Approach 1:
The patent uses a universal immobilized fibrin composition that can bind to multiple fibrin receptors (e.g., αvβ3, αvβ5, CD11b/CD18) simultaneously. This multi-functional approach allows the assay to screen for agents with broad specificity while maintaining high binding affinity, reducing the need for highly specific single-receptor targets.
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 fibrin composition induces a significant increase in cell activation, with a two-fold to 100-fold increase in biological outputs such as gene expression and reactive oxidative species, effectively predicting in vivo activity and identifying potential therapeutic agents for conditions like autoimmunity and neurodegenerative diseases.
Implementation Method 1
The fibrin composition displays the biochemical properties of 1) high affinity binding to fibrin receptors
Data Source
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AI summary
The present invention provides compositions exhibiting in vivo activity of fibrin in an in vitro setting, in vitro assays comprising such compositions, methods of producing such compositions, and methods of using such compositions and assays. The compositions of the invention include molecules with the biochemical properties of 1 ) high affinity binding to fibrin receptors and 2) activation of cell-signaling systems comparable to that observed in vivo by fibrin. The fibrin compositions of the invention are compatible both in biochemical assays and cell-based assays, and thus useful for in vitro assays for screening of test agents that modulate cell activation and/or signaling pathways mediated by fibrin or associated with fibrin activity.