Chimeric TSH Receptor Transgenic Cells for Autoantibody Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current diagnostic techniques for thyroid diseases involving thyroid hormone blocking immunoglobulin (TBI) and thyroid stimulating immunoglobulin (TSI) are cumbersome, laborious, and lack sufficient sensitivity and specificity, necessitating the development of more effective detection methods.
Innovation Solution
A method using transgenic cells stably transfected with a reporter gene and a chimeric TSH receptor, which express a chimeric TSH receptor on the cell membrane, to detect TBI and TSI by measuring the level of reporter gene expression in response to TSH binding, allowing for sensitive and specific detection of both immunoglobulins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional diagnostic techniques are used for detecting TBI and TSI, then the detection process is available, but the techniques are cumbersome, laborious, and lack sufficient sensitivity and specificity
Solution Approach 1:
The patent replaces traditional mechanical/lab-based diagnostic techniques with a cell-based biological assay system. Transgenic cells expressing chimeric TSH receptors are used to detect TBI and TSI through functional interaction, eliminating the need for complex mechanical separation and purification procedures while improving sensitivity and specificity through direct biological recognition.
Solution Approach 2:
The transgenic cells serve as self-contained detection units that inherently possess the receptor structures needed to recognize TBI and TSI. The cells perform the detection function through their own expressed chimeric TSH receptors, eliminating the need for external detection mechanisms and simplifying the overall system while maintaining high measurement precision.
2Measurement precision
If transgenic cells with chimeric TSHR are used to detect TBI, then detection sensitivity is improved, but the method complexity increases
Solution Approach 1:
The transgenic cell line serves multiple functions: it expresses the chimeric TSHR for detection, provides the cellular framework for the assay, and enables both TBI and TSI detection through the same system. This multi-functionality reduces the need for separate detection components and simplifies the overall assay architecture while maintaining high sensitivity.
Solution Approach 2:
The patent modifies the TSHR structure to create a chimeric receptor with enhanced properties for detecting blocking antibodies. By changing the receptor parameters (combining human TSHR with mouse LH/CGR receptor elements), the system achieves improved sensitivity without requiring complex additional detection mechanisms, as the chimeric receptor itself provides the enhanced detection capability.
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 method provides a sensitive and specific detection of TBI and TSI, with improved IC50 values compared to traditional methods, enabling effective diagnosis and monitoring of thyroid diseases.
Implementation Method 1
contacting the transgenic cells and the TSH... under conditions for binding of the TSH to the chimeric TSHR
Implementation Method 2
a reporter gene operably linked to a cAMP-inducible promoter
Implementation Method 3
expression of a bioluminescence protein... the bioluminescence protein comprises Renilla luciferase amino acid sequence SEQ ID NO:03
Data Source
AI summary
The invention provides compositions and methods for detecting thyroid hormone blocking immunoglobulin (TBI). The invention's methods are sensitive and specific for TBI, and may be used for the dual detection of both TBI and TSI. The invention's compositions and methods are useful for the diagnosis of diseases that are associated with the presence of TBI and/or TSI, for monitoring the progress of disease and/or treatment regimens, therapeutics, vaccines, etc., and for assisting clinicians in making treatment decisions.