Far-Red Dye Probe Formulation to Prevent Fluorophore Aggregation
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Solution Overview
Problem
Formulation of far-red dye probes in aqueous form leads to significant loss of fluorescent signal due to aggregation and self-quenching of fluorophores, posing challenges in bioscience applications.
Innovation Solution
Incorporation of non-linear surfactants such as polysorbate 20, polysorbate 40, polysorbate 60, or digitonin at concentrations greater than 0.05% (v/v) in far-red dye probe formulations, along with a buffering agent, stabilizes the probes by preventing aggregation and maintaining fluorescence intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If far-red dye probes are formulated in aqueous form, then the probes can be used in bioscience applications, but significant loss of fluorescent signal occurs due to aggregation and self-quenching
Solution Approach 1:
The patent introduces non-linear surfactants (polysorbate 20, polysorbate 40, polysorbate 60, or digitonin) as intermediary substances that mediate between the hydrophobic far-red dye molecules and the aqueous environment. These surfactants form micelles that solubilize the dye molecules, preventing their aggregation and self-quenching while maintaining fluorescent signal stability in aqueous formulations for bioscience applications.
2Reliability
If non-linear surfactants are added to prevent aggregation, then fluorescence intensity is maintained, but formulation complexity increases
Solution Approach 1:
The patent specifies precise concentration ranges for non-linear surfactants (greater than 0.05% v/v, preferably 0.1-10% v/v) and buffering agents (5-50 mM Tris) to optimize fluorescent signal stability. By carefully controlling these formulation parameters, the patent achieves reliable fluorescence intensity maintenance while managing formulation complexity through defined compositional specifications.
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 stabilized formulations exhibit less than a 20% drop in relative fluorescence units (RFU) after 30 days of storage, ensuring consistent performance in bioscience applications.
Implementation Method 1
Incorporation of non-linear surfactants such as polysorbate 20, polysorbate 40, polysorbate 60, or digitonin at concentrations greater than 0.05% (v/v) in far-red dye probe formulations, along with a buffering agent, stabilizes the probes by preventing aggregation and maintaining fluorescence intensity.
Implementation Method 2
Probes comprising far-red fluorescent dyes are widely used in many bioscience applications, including, for example, in vitro detection assays, traditional and super-resolution localization microscopy, and live cell imaging.
Data Source
AI summary
Disclosed are formulations, including both liquid and lyophilized formulations, comprising a far-red dye probe and a non-linear surfactant or foamban. Also disclosed are related methods for preparing a lyophilized far-red dye probe formulation as well as related kits and diagnostic products.