Multifunctional Bioluminescent Probes for Specific Long-Term Cell Labeling
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Solution Overview
Problem
Current cell-based assays face challenges in specifically labeling one cell population within a heterogenous mixture, particularly in co-culture environments, leading to inaccurate and short-term measurements due to non-specific release of labeling probes.
Innovation Solution
A multifunctional probe comprising a capture element, linker, and biomolecule-reactive group is used to form covalent bonds with cell-associated biomolecules, followed by contacting the cell with capture/detection reagents to form a bioluminescent complex, allowing for specific labeling and monitoring of cellular responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional labeling probes are used to label cells in co-culture environments, then cell labeling can be achieved, but the labeling is non-specific and the measurement duration is limited to short-term only
Solution Approach 1:
The probe is divided into two distinct functional modules: a cell-permeable portion that enters the cell and binds to intracellular targets, and a cell-impermeable portion that remains outside and provides the detection signal. This segmentation allows the probe to achieve both specific intracellular labeling and stable extracellular signal detection, resolving the contradiction between labeling specificity and measurement duration.
Solution Approach 2:
The cell membrane acts as an intermediary that separates the probe into two functional zones. The cell-permeable portion crosses the membrane to achieve specific intracellular binding, while the cell-impermeable portion remains extracellular to provide stable signaling. This intermediary approach enables the probe to overcome the limitation of non-specific release while maintaining long-term measurement capability.
2Measurement precision
If cell-permeable probes are used to label intracellular targets, then specific labeling can be achieved, but the probe releases from cells over time limiting measurement to short-term
Solution Approach 1:
The probe is segmented into a cell-permeable portion for specific intracellular binding and a cell-impermeable portion for stable extracellular signaling. This segmentation resolves the contradiction by allowing the signaling portion to remain outside the cell where it is not subject to intracellular degradation or release, thereby maintaining signal stability over long periods while the permeable portion provides specific labeling.
Solution Approach 2:
The probe exhibits multi-functionality by simultaneously providing specific intracellular binding through its permeable portion and stable long-term signaling through its impermeable portion. This dual functionality allows the single probe molecule to overcome both the specificity and stability limitations that plague traditional single-function probes.
3Adaptability or versatility
If traditional probes are used in heterogeneous cell mixtures, then general cell labeling is possible, but specific labeling of one cell population cannot be achieved
Solution Approach 1:
The probe exhibits local quality by having different permeability properties in different regions: the cell-permeable portion can selectively enter specific cell populations through the plasma membrane, while the cell-impermeable portion remains outside to provide the detection signal. This local differentiation in permeability allows specific labeling of target cell populations within heterogeneous mixtures while maintaining detection accuracy.
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
Enables accurate and prolonged measurement of cellular responses by forming a stable bioluminescent complex, enhancing signal detection and facilitating long-term assays in mixed cell populations.
Implementation Method 1
capable of binding the biomolecule and generating a bioluminescent and/or fluorescent signal
Implementation Method 2
capable of binding the biomolecule and generating a bioluminescent and/or fluorescent signal
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
Provided herein are materials and methods for performing bioluminescent assays using a bifunctional probe. In particular, the present disclosure provides compositions and methods for detecting and/or quantifying a biomolecule and/or assaying a cellular process associated with the biomolecule using a bifunctional probe capable of binding the biomolecule and generating a bioluminescent and/or fluorescent signal.