Collagen IV Binding Assay for Collagen VII Detection
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Solution Overview
Problem
Current methods lack effective means to accurately detect and quantify collagen VII levels in biological samples, which is crucial for diagnosing and monitoring dystrophic epidermolysis bullosa, a genetic condition causing skin fragility and blistering, as mutations in the COL7A1 gene impair collagen VII expression and anchoring fibril formation.
Innovation Solution
A method involving contacting a sample with collagen IV or its fragments to bind with collagen VII, followed by using anti-collagen VII antibodies to detect and quantify the bound collagen VII, either in its full length or fragment form, utilizing techniques such as ELISA to measure the levels in biological samples like tissue biopsies or biological fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current detection methods are used, then detection capability is limited, but measurement precision of collagen VII levels is insufficient
Solution Approach 1:
The patent uses collagen IV as an intermediary substance to indirectly detect collagen VII levels. Collagen IV binds specifically to collagen VII in the sample, forming a complex that can then be detected by anti-collagen VII antibodies. This intermediary approach overcomes the difficulty of direct detection and achieves precise measurement of collagen VII expression levels in biological samples.
2Reliability
If accurate detection of collagen VII is achieved, then diagnostic capability for DEB improves, but detection method complexity increases
Solution Approach 1:
The detection method is segmented into distinct sequential steps: first contacting the sample with collagen IV to bind collagen VII, then adding anti-collagen VII antibodies for detection, and finally measuring the signal. This segmentation of the detection process into modular steps improves reliability by ensuring each step can be optimized and controlled independently, while making the overall complex method more manageable and systematic.
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
This method enables precise detection and quantification of collagen VII, aiding in the diagnosis, prognosis, and monitoring of DEB, ensuring batch-to-batch consistency and quality of collagen VII drug products, and determining their stability and shelf life.
Implementation Method 1
contacting the sample with collagen IV or a fragment thereof which binds to collagen VII; and detecting binding of collagen VII or a fragment thereof to collagen IV
Implementation Method 2
contacting the sample with an anti-collagen VII antibody, which binds to an epitope of collagen VII or a fragment thereof which is accessible after the binding of collagen VII or a fragment thereof to collagen IV
Data Source
AI summary
The present disclosure features a method of detecting and/or quantifying collagen VII or a fragment thereof in a sample, the method including contacting the sample with collagen IV or a fragment thereof which binds to collagen VII; and contacting the sample with an anti-collagen VII antibody, wherein the anti-collagen VII antibody binds to the NC2 domain of collagen VII; detecting binding of the anti-collagen VII antibody to thereby detect and/or quantify an amount of collagen VII or the fragment thereof in the sample. A method of evaluating or processing a collagen VII preparation is also provided.