STAT1 Allele-Specific CRISPR Knockout via SNP Targeting
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Solution Overview
Problem
Current methods are inadequate for distinguishing and targeting dominant-mutated alleles causing genetic disorders like chronic mucocutaneous candidiasis (CMC), particularly in the STAT1 gene, to knock out the mutated allele and allow expression of the functional protein.
Innovation Solution
A method involving CRISPR nuclease and a guide RNA molecule targeting specific SNPs in the STAT1 gene to induce double-strand breaks, facilitating the knockout of the mutated allele and allowing expression of the functional allele, using a composition comprising a CRISPR nuclease and an RNA molecule with a guide sequence portion of 17-25 nucleotides to affect editing in cells, including hematopoietic stem cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current methods are used to target genetic mutations, then general gene editing may occur, but inability to distinguish and selectively knock out dominant-mutated alleles persists
Solution Approach 1:
The guide RNA is designed to recognize specific local nucleotide differences (SNPs) that are present only in the mutated allele, allowing the CRISPR system to selectively target and knock out the dominant-mutated allele while preserving the functional allele through allele-specific binding properties
Solution Approach 2:
The genetic target is segmented into distinguishable alleles based on nucleotide differences, with the guide RNA specifically recognizing and binding to the mutated allele segment, enabling selective editing of only the problematic allele rather than the entire gene
2Manufacturing precision
If CRISPR nuclease and guide RNA are introduced to cells, then mutated allele knockout is achieved, but off-target effects and functional allele damage may occur
Solution Approach 1:
The guide RNA sequence is designed to match the mutated allele with high specificity, recognizing unique local nucleotide patterns that differentiate it from the functional allele, thereby concentrating the CRISPR nuclease activity exclusively on the mutated allele and minimizing off-target effects
Solution Approach 2:
The guide RNA acts as an intermediary that mediates between the CRISPR nuclease and the target DNA, providing allele-specific recognition through its sequence complementarity to the mutated allele while preventing nonspecific binding to the functional allele or other genomic regions
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 inactivates the mutant STAT1 allele, restoring normal gene expression and reducing disease-associated phenotypes, thereby treating or preventing CMC by ensuring the expression of functional STAT1 protein.
Implementation Method 1
A method involving CRISPR nuclease and a guide RNA molecule targeting specific SNPs in the STAT1 gene to induce double-strand breaks, facilitating the knockout of the mutated allele
Data Source
AI summary
RNA molecules comprising a guide sequence portion having 17-25 contiguous nucleotides containing nucleotides in the sequence set forth in any one of SEQ NOs 1-37365 and compositions, methods, and uses thereof.