v-erbB Gene Detection Using Segmented Probes for Mammary Carcinoma
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Solution Overview
Problem
A new member of the tyrosine kinase family amplified in human mammary carcinoma, closely related to but distinct from the EGF receptor gene, has not been identified, limiting understanding of its role in tumor formation and development.
Innovation Solution
A cloned human gene with a specific nucleotide sequence is isolated and characterized, allowing for the production of RNAs, polypeptides, antibodies, and diagnostic kits for detecting carcinomas, as well as the creation of transformed cells expressing this gene, enabling the study of its role in mammary carcinoma.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the EGF receptor gene is used as a probe, then genes closely related to EGF receptor can be detected, but distinct new members of the tyrosine kinase family cannot be identified
Solution Approach 1:
The patent segments the detection approach by creating a hierarchical probe system: EGF receptor gene probes detect known members, while the newly isolated v-erbB-related gene probe detects distinct new members. This segmentation allows simultaneous maintenance of high specificity for known genes and expansion of detection capability to novel genes within the tyrosine kinase family.
Solution Approach 2:
The patent introduces an intermediary probe based on the v-erbB-related gene that mediates between the EGF receptor probe and the target genes. This intermediary probe has sequence homology to both EGF receptor and the new v-erbB-related gene, enabling it to detect distinct new members that the EGF receptor probe alone cannot identify, thus bridging the gap between known and novel gene detection.
2Reliability
If only known EGF receptor gene is studied, then understanding of established pathways is maintained, but role of new tyrosine kinase family members in tumor formation remains unknown
Solution Approach 1:
The patent applies preliminary action by first isolating and characterizing the v-erbB-related gene sequence before using it for functional studies. This preliminary characterization establishes a reliable knowledge base about the new gene's structure and relationship to EGF receptor, enabling subsequent investigation of its role in tumor formation without compromising the reliability of established pathways.
Solution Approach 2:
The patent creates a copy of the v-erbB-related gene sequence that can be used for repeated experimentation and analysis. This copied sequence allows researchers to study the new gene's function in tumor formation multiple times without depleting the original source, while maintaining accurate representation of the gene for comparative analysis with EGF receptor pathways.
3Measurement precision
If gene amplification in mammary carcinoma is investigated using existing probes, then EGF receptor amplification can be detected, but amplification of distinct v-erbB-related gene cannot be identified
Solution Approach 1:
The patent applies local quality by creating probes with specific sequence characteristics tailored to detect particular gene amplifications. The v-erbB-related gene probe has local sequence homology that allows it to specifically detect amplification of this distinct gene in mammary carcinoma, while the EGF receptor probe detects amplification in other tumor types, providing localized detection capability for different genetic events.
Solution Approach 2:
The patent achieves universality by developing a dual-probe system where each probe serves multiple functions: the EGF receptor probe detects EGF receptor gene amplification across various tumor types, while the v-erbB-related gene probe detects distinct gene amplification specifically in mammary carcinoma. Together, they provide universal coverage for detecting different amplification events in different tumor contexts.
Data Source
AI summary
The isolation, cloning and characterization of a human gene related to but distinct from EGF receptor gene has been described. Nucleotide sequence of the gene and amino acid sequence of the polypeptide encoded by the gene have been determined. The use of the nucleic acid probes and antibodies having specific binding affinity with said polypeptide for diagnostic and therapeutic purposes have also been described.