Phospholipid NIR Molecular Beacon for In Vivo Phospholipase Detection
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Solution Overview
Problem
There is a need for a reliable method to monitor the activation of phospholipase in vivo, as existing methods are inadequate in accurately detecting and measuring phospholipase activity in cancer cells and tumors, which is crucial for understanding cancer progression and treatment efficacy.
Innovation Solution
A phospholipid-based near-infrared (NIR) molecular beacon is developed, comprising a phospholipid moiety with a covalently linked NIR fluorophore and quencher, where enzymatic cleavage of the phospholipid results in detectable fluorescence changes, allowing for the monitoring of phospholipase activity in vivo.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic resonance spectroscopy (MRS) is used to detect phosphocholine levels, then phospholipase activity can be indirectly monitored, but the measurement precision and reliability of phospholipase detection is insufficient
Solution Approach 1:
The patent uses a molecular beacon as an intermediary substance that specifically binds to phospholipase. The beacon consists of a phospholipid head group that attracts phospholipase and a fluorophore-quencher pair that generates a detectable signal upon enzyme binding, thereby mediating between the enzyme and the detection system to improve both precision and reliability
Solution Approach 2:
The patent employs fluorophore-quencher pairs that exhibit fluorescence changes upon phospholipase binding. The fluorophore emits light in a specific wavelength range, and when the enzyme binds to the molecular beacon, the fluorescence signal changes (either increases or decreases depending on the configuration), providing a reliable and precise optical readout of phospholipase activity
2Ease of operation
If existing detection methods are used, then phospholipase activity can be monitored, but the ease of operation and real-time monitoring capability is limited
Solution Approach 1:
The patent replaces complex mechanical or chemical assay systems with an optical detection system based on fluorescence. The molecular beacon converts phospholipase binding events directly into fluorescence signals that can be monitored in real-time using standard fluorometers or imaging systems, greatly simplifying operation and enabling continuous monitoring without time loss
Solution Approach 2:
The molecular beacon is designed to autonomously detect phospholipase activity through its inherent fluorescence properties. The phospholipid head group self-assembles to attract phospholipase, and the fluorophore-quencher pair automatically generates the signal upon enzyme binding, eliminating the need for complex external detection procedures and enabling real-time monitoring
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 NIR molecular beacon effectively detects phospholipase activity in real-time, providing insights into cancer cell metabolism and treatment responses, and can identify modulators or inhibitors of tumor growth and inflammation.
Implementation Method 1
a first fluorophore moiety covalently linked to the glycerol backbone of said phospholipid either directly or via a linker, wherein said first fluorophore moiety is an NIR fluorophore moiety; and a quencher moiety covalently linked to said phospholipid glycerol backbone either directly or via a linker, wherein a change in fluorescence of said NIR fluorophore is detectable upon an enzymatic cleavage of said phospholipid
Data Source
AI summary
The present invention is directed to a phospholipid-based NIR molecular beacon, having a phospholipid moiety; with an NIR fluorophore moiety covalently linked to a phospholipid glycerol backbone and a quencher moiety covalently linked to the phospholipid glycerol backbone. Additionally, provided herein is methods of analyzing a sample for the presence of a phospholipase and methods of identifying the activity of a phospholipase in vivo utilizing phospholipid-based NIR molecular beacon.