CRISPR-Cas9 Fel d 1 Gene Editing for Hypoallergenic Cats
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Solution Overview
Problem
Current methods for reducing cat allergens, particularly Fel d 1, in households are inadequate, as they either partially reduce allergen levels through selective breeding or require costly and time-consuming processes, and do not completely eliminate allergens, leading to persistent symptoms in severely allergic individuals.
Innovation Solution
The use of CRISPR-Cas9 gene editing technology to selectively delete Fel d 1 genes in cat cells, employing chimeric guide RNAs and the Cas9 protein to introduce targeted double-stranded breaks in the Fel d 1 genomic sequence, resulting in reduced or eliminated production of the allergen protein.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If selective breeding is used to reduce cat allergens, then allergen levels are partially reduced, but the process is time-consuming and does not completely eliminate allergens
Solution Approach 1:
The patent replaces the mechanical breeding process with CRISPR-Cas9 gene editing technology. Instead of relying on multiple generations of selective breeding to reduce Fel d 1 allergen levels, the invention uses molecular biology tools (guide RNAs and Cas9 protein) to directly edit the genome and eliminate the allergen-producing genes, achieving complete elimination in a single generation rather than requiring extensive time-consuming breeding programs
Solution Approach 2:
The patent changes the fundamental approach from gradual reduction through breeding to complete elimination through genomic editing. By modifying the genetic parameter at the DNA level using CRISPR-Cas9, the invention transforms the allergen production capability from present to absent, achieving a qualitative change rather than gradual quantitative reduction
2Object-affected harmful factors
If selective breeding is used to reduce cat allergens, then allergen levels are partially reduced, but complete elimination is not achieved
Solution Approach 1:
The patent replaces the imprecise mechanical breeding process with precise CRISPR-Cas9 gene editing. The guide RNAs are designed to specifically target and bind to the Fel d 1 gene sequences, ensuring that only the intended allergen-producing genes are edited. This molecular precision eliminates the uncertainty and incomplete elimination that characterize traditional breeding approaches
Solution Approach 2:
The patent introduces guide RNAs as intermediary molecules that mediate between the CRISPR-Cas9 system and the target Fel d 1 genes. These guide RNAs provide sequence-specific recognition and binding, ensuring that the Cas9 protein cuts only at the intended locations in the allergen genes, thereby achieving reliable and complete elimination without affecting other genomic regions
3Object-affected harmful factors
If CRISPR-Cas9 gene editing is used to eliminate Fel d 1 genes, then complete allergen elimination is achieved, but the process complexity increases
Solution Approach 1:
The patent segments the complex gene editing process into distinct functional components: guide RNA molecules that provide targeting specificity, Cas9 protein that provides cutting activity, and the target Fel d 1 genes that provide the editing substrate. This segmentation allows each component to be optimized independently and simplifies the overall process by breaking down the complex task of allergen elimination into manageable molecular steps
4Ease of manufacture
If traditional breeding methods are used, then the process is simple, but productivity in terms of allergen reduction is low
Solution Approach 1:
The patent replaces the slow mechanical breeding process with accelerated molecular gene editing. Instead of waiting multiple generations for selective breeding to gradually reduce allergen levels, the CRISPR-Cas9 system directly modifies the genome in a single generation, achieving complete elimination of Fel d 1 genes and instantaneously producing hypoallergenic cats, thereby dramatically increasing productivity
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
This approach effectively reduces or eliminates the production of Fel d 1 protein in cats, providing a more comprehensive solution to cat allergy symptoms by creating hypoallergenic felines with long-term genetic modification, potentially offering a sustainable alternative to selective breeding.
Implementation Method 1
The use of CRISPR-Cas9 gene editing technology to selectively delete Fel d 1 genes in cat cells, employing chimeric guide RNAs and the Cas9 protein to introduce targeted double-stranded breaks in the Fel d 1 genomic sequence
Data Source
AI summary
Compositions and methods for genetically modifying felines or feline cells are described. The compositions and methods are useful for knocking out all or a portion of a Fel d 1 gene from a feline genome. Feline cells and organisms in which all or a portion of the Fel d 1 gene is knocked out are also described. The compositions and methods may include reagents and procedures for CRISPR-Cas9-mediated genomic editing of Fel d 1.