Zinc-Responsive Fluorescent Probe for Non-Invasive Cellular Detection
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Solution Overview
Problem
Current methods lack effective means to detect physiological changes in zinc concentration and correlate them to cellular phenomena, particularly in oocyte maturation and fertilization processes, which are crucial for successful fertilization and cell cycle regulation.
Innovation Solution
Development of Zn-responsive probes that coordinate with zinc ions to emit detectable signals, allowing for non-invasive detection of zinc release and uptake by cells, and correlation with cellular events such as fertilization, using a probe comprising a Zn-binding group, a signaling moiety, and an attachment group that can be attached to a surface to prevent probe uptake into cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If fluorescent probes are used to detect zinc ions, then detection capability is improved, but probe uptake into cells causes harmful effects
Solution Approach 1:
A zinc ion is introduced as an intermediary mediator between the fluorescent probe and the cell. The probe binds to zinc ions in the extracellular medium, and this zinc-probe complex then interacts with the cell surface. This intermediary approach allows detection without the probe penetrating into the cell, thereby maintaining detection capability while avoiding harmful intracellular uptake
Solution Approach 2:
The detection system is segmented into separate functional components: the fluorescent probe remains in the extracellular environment while zinc ions act as mobile carriers that transfer information about cellular zinc status to the probe. This segmentation allows the probe to stay outside the cell (avoiding harm) while still detecting intracellular zinc changes through the zinc ion mediator
2Loss of information
If zinc concentration changes are monitored, then cellular event correlation is improved, but current methods lack effectiveness
Solution Approach 1:
The system establishes a feedback loop where fluorescent signal intensity continuously reflects zinc concentration changes, which in turn reflect cellular event progression (such as fertilization or cell cycle transitions). The real-time optical feedback provides reliable correlation between zinc dynamics and cellular phenomena, making the detection method both effective and informative
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 detection and correlation of zinc concentration changes with cellular events, providing markers for oocyte quality and fertilization success, and facilitating non-invasive selection of high-quality eggs for IVF and other applications.
Implementation Method 1
a Zn-binding group configured to coordinate one or more Zn ions
Implementation Method 2
the signaling moiety comprises a fluorophore... the fluorescence intensity, emission spectra, and/or excitation spectra of the signaling moiety is altered by coordination of one or more Zn ions
Data Source
AI summary
The invention relates generally to compositions and methods for the detection of zinc. In particular, compositions and methods are provided to detect changes in cellular zinc concentration and to correlate them to cellular phenomena.