Taste-Specific Gene Identification via Segmented Screening
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Solution Overview
Problem
Current methods are inadequate for identifying and functionalizing taste-specific genes in primates and humans, particularly for salty taste receptors, and do not fully understand the expression and functions of taste-specific genes in taste cells, limiting the development of therapeutics for taste-related disorders.
Innovation Solution
The development of novel protocols using gene chips, PCR screens, and histological methods to identify and characterize taste-specific genes, particularly those involved in salty taste, by analyzing expression in specific taste cells and tissues, and functionalizing these genes for use in high-throughput screening assays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gene chips and PCR screens are used to identify taste-specific genes, then the ability to identify and characterize taste-specific genes is improved, but the complexity of the methodology increases
Solution Approach 1:
The identification process is divided into multiple stages: initial gene chip screening to identify candidate genes, followed by PCR validation to confirm taste-specific expression, and finally functional assays to verify receptor activity. This segmentation allows each method to focus on specific tasks, improving overall accuracy while making the complex process more manageable and systematic.
Solution Approach 2:
The patent uses laser capture microdissection as an intermediary technique to isolate pure taste bud cells before gene analysis. This intermediary step ensures that the genes being identified are truly taste-specific by eliminating contamination from surrounding tissues, thereby improving measurement precision without requiring the gene chip and PCR methods to work perfectly on their own.
2Reliability
If laser capture microdissection is used to isolate taste cells, then the purity of taste cell samples is improved, but the time and complexity of sample preparation increases
Solution Approach 1:
Tissues are fixed and processed in advance to optimize laser capture microdissection efficiency. The laser capture microdissection protocol itself is optimized to rapidly isolate cells, and multiple cells are isolated simultaneously rather than one at a time. This preliminary preparation and optimization reduces the actual time required for the critical isolation step while maintaining high purity.
Solution Approach 2:
The patent isolates multiple taste bud cells in parallel from different tissue sections, creating multiple identical samples that can be processed simultaneously. This copying approach multiplies the output without proportionally increasing the time required, as the same isolation protocol is applied to multiple samples at once.
3Measurement precision
If multiple histological methods are used to confirm gene expression, then the accuracy of expression confirmation is improved, but the number of steps and resources required increases
Solution Approach 1:
The patent combines in situ hybridization and immunohistochemistry in a double-labeling approach, where both methods are applied to the same tissue sections simultaneously. This merging allows confirmation of gene expression and protein localization in the same cells without requiring separate experiments, thereby maintaining high accuracy while improving productivity by reducing the total number of steps.
Data Source
AI summary
This invention relates to novel rationale and methods for identifying human and primate taste-specific genes, including genes involved in salty taste perception, especially human salty taste perception, but also genes involved in sweet, bitter, umami, and sour taste perception, and genes involved in other taste cell or taste receptor related activities such as digestive function and digestive related diseases, taste cell turnover, immunoregulation of the oral and digestive tract, and metabolic regulation such as in diabetes and obesity, the genes identified using these methods, and assays for identifying taste modulators (enhancers or blockers) and potential therapeutics using these genes. These compounds have potential application in modulating (enhancing or blocking) taste perception, especially salty taste perception and as potential therapeutics. In addition, this invention relates to novel methods for identifying taste-specific genes that can be used as markers for different taste cell types, including sweet, bitter, umami, sour, salty, and other taste cells in mammals as well as assays that measure the activity of the sweet, bitter, umami, or sour receptor in the presence of these genes to identify modulators of sweet, bitter, umami, and sour taste and to identify therapeutics especially for treating digestive or metabolic disorders, taste loss, and oral infections. Particularly, the genes identified herein and antibodies or oligos thereto can be used as markers to identify and/or purify specific taste cells e.g., from taste cell suspensions by use of FACS or magnetic bead cell selection or other known cell purification and isolation procedures.