Mosquito Odorant Receptor Expression for High-Throughput Screening
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Solution Overview
Problem
Existing technologies face challenges in efficiently expressing and screening arthropod chemosensory receptors, particularly mosquito odorant receptors, for the development of repellents and attractants, due to limited functional expression in common heterologous systems and low throughput in electrophysiological assays.
Innovation Solution
The use of a mammalian cell line, preferably the human U2OS, immortalized cell line, for transient expression of arthropod chemosensory receptors, specifically mosquito odorant receptors, using a baculovirus expression vector system, such as BacMam, to facilitate high-throughput screening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If common heterologous expression systems are used for arthropod chemosensory receptors, then the expression system is simple and widely available, but the functional expression is limited and unreliable
Solution Approach 1:
The patent uses a baculovirus expression vector system as an intermediary to deliver arthropod chemosensory receptor genes into mammalian cells (HEK293 or U2OS). The baculovirus acts as a mediator that enables efficient transduction and expression of the receptor genes, overcoming the limitations of direct transfection methods while maintaining the advantages of using well-established mammalian cell lines.
2Productivity
If electrophysiological assays are used for screening arthropod control agents, then the assay provides detailed functional information, but the throughput is low
Solution Approach 1:
The patent replaces traditional electrophysiological measurement methods with a fluorescent calcium indicator-based assay system. Instead of using complex electrophysiological equipment to measure ion channel activity, the invention uses fluorescence microscopy or plate readers to detect calcium flux through the chemosensory receptors, enabling high-throughput screening while maintaining functional relevance.
3Productivity
If a reliable expression system is developed for high-throughput screening, then the throughput increases for compound screening, but the cell line and expression method become more specific and complex
Solution Approach 1:
The patent establishes a universal expression platform using baculovirus-transduced HEK293 or U2OS cells that can express multiple different arthropod chemosensory receptor types. This system serves multiple functions: it enables high-throughput screening of compound libraries, allows structure-activity relationship studies, and can be applied to various arthropod species receptors, making it a versatile tool for arthropod control research.
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 functional expression and high-throughput screening of arthropod chemosensory receptors, particularly mosquito odorant receptors, in mammalian cells, allowing for the identification of effective arthropod control agents.
Implementation Method 1
transiently expressed using a baculovirus expression vector system
Data Source
AI summary
The present disclosure is directed to a mammalian cell comprising an arthropod chemosensory receptor and its uses in methods of identifying repellents and attractants or traps for use in an arthropod control article comprising an arthropod control composition. The cell may be contained in a cell-based assay or disposed on a solid support.