FAP-Targeted Conjugates for CAF Imaging and Tumor Resection
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Solution Overview
Problem
Current methods lack an efficient way to image and surgically remove cancer-associated fibroblasts (CAFs) in the tumor microenvironment, as existing NIR dye conjugates target only cancer cells and not stromal cells.
Innovation Solution
Development of conjugates comprising a fibroblast activation protein (FAP) inhibitor, a bivalent linker, and a near-infrared (NIR) dye or therapeutic agent, which selectively target CAFs for imaging and treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing NIR dye conjugates target only cancer cells, then cancer cell imaging is achieved, but stromal cells (CAFs) cannot be imaged
Solution Approach 1:
The patent applies universality by designing a conjugate system that can target multiple cell types (cancer cells and CAFs) through selective binding to FAP overexpressed on CAFs, while maintaining the imaging function. The FAP inhibitor-conjugate system provides multi-functionality by enabling both specific CAF targeting and imaging capabilities in a single platform.
Solution Approach 2:
The patent applies local quality by utilizing the specific biochemical property of FAP overexpression on CAFs in the tumor stroma. The conjugate is designed to selectively bind to FAP at the local tumor microenvironment level, enabling differential imaging of stromal cells versus normal cells based on local FAP expression levels.
2Measurement precision
If FAP-targeted conjugates are developed to image CAFs, then stromal cell visualization is enabled, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the conjugate into distinct functional modules: a FAP inhibitor component for specific binding and a NIR dye component for imaging. This modular segmentation allows each component to perform its specialized function while simplifying the overall design and synthesis of the conjugate system.
Solution Approach 2:
The patent uses a linker molecule as an intermediary to connect the FAP inhibitor and NIR dye components. This intermediary element facilitates the coupling of functional modules while maintaining the biochemical activity of the FAP inhibitor and the imaging properties of the NIR dye, thereby managing complexity through functional decoupling.
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 effective visualization and surgical removal of CAFs, enhancing tumor resection by targeting FAP-expressing cells, thereby improving surgical outcomes.
Implementation Method 1
NIR dye to fluoresce through an application of an optical stimulus thereto
Data Source
AI summary
The present teachings relate generally to conjugates and methods for imaging a tumor microenvironment in a patient, and to conjugates and methods for imaging cancer-associated fibroblasts (CAFs) in the tumor microenvironment of a patient. The present teachings relate generally to method of making conjugates comprising a fibroblast activation protein (FAP) inhibitor.