Transgenic Fish Biosensor for Estrogenic Compound Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current transgenic fish assays are limited in monitoring endocrine disruptors in freshwater species and cannot be used in marine environments, lacking the ability to detect estrogenic and anti-estrogenic compounds effectively.
Innovation Solution
Development of transgenic fish with an expression cassette containing an estrogen-responsive 5′-regulatory nucleotide sequence from medaka fish, linked to a reporter protein, which expresses observable marks when exposed to estrogenic or anti-estrogenic compounds, enabling detection and monitoring in various aquatic environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current transgenic fish assays are used, then detection of estrogenic compounds is possible, but monitoring in freshwater and marine environments is not feasible
Solution Approach 1:
The patent creates transgenic fish that can function as biosensors across multiple environmental contexts (freshwater and marine). The expression cassette with estrogen-responsive regulatory sequences from medaka fish enables universal detection capability across different aquatic environments, making the assay system adaptable to various ecological niches while maintaining reliable detection of estrogenic compounds
2Productivity
If cell line assays are used, then rapid and sensitive detection is achieved, but toxicodynamic and toxicokinetic information is lost
Solution Approach 1:
The patent uses transgenic fish as an intermediary system between cell line assays and whole organism studies. The fish express reporter genes under estrogen-responsive promoters, providing rapid detection like cell lines while maintaining the physiological context of a complete organism, thereby preserving toxicodynamic and toxicokinetic information that would be lost in simplified cell culture systems
3Adaptability or versatility
If transgenic fish with medaka estrogen-responsive sequences are developed, then detection in marine environments becomes possible, but assay complexity increases
Solution Approach 1:
The patent extracts the estrogen-responsive regulatory sequences from medaka fish and incorporates them into an expression cassette that can be introduced into various fish species. This extraction of the key functional element (the regulatory sequence) allows marine environment compatibility without requiring complete species replacement, thereby managing complexity while achieving environmental adaptability
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 transgenic fish effectively detect estrogenic and anti-estrogenic compounds, facilitating their monitoring in both freshwater and marine environments, and provide insights into liver regeneration, offering a sensitive and quantifiable method for assessing environmental estrogen-like activity.
Implementation Method 1
an estrogen-responsive 5′-regulatory nucleotide sequence isolated from a medaka fish, where the regulatory nucleotide sequence is operably linked 5′ to the reporter nucleotide sequence to induce expression of the reporter protein in the presence of estrogen or an estrogen-like compound
Data Source
AI summary
The present invention relates to a transgenic fish having at least one genomically integrated expression cassette containing a 5′-regulatory nucleotide sequence responsive to hormones, particularly estrogenic hormones, connected in a functional manner upstream of a nucleotide sequence encoding a reporter protein. The present invention further relates to methods of using the transgenic fish for various purposes, including, for example: (1) identifying estrogenic endocrine disruptors; (2) monitoring estrogen-like activity of test samples; (3) identifying anti-estrogenic endocrine disruptors; and (4) investigating the effects of endocrine disruptors on liver regeneration. Expression cassettes, host cells, and transgenic cells of aquatic animals are also disclosed.