Custom Mito-Plus Whole Exome Capture Kit for Dual-Genome Diagnostics
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Solution Overview
Problem
Current whole-exome capture kits lack reliable and simultaneous interrogation of mitochondrial and nuclear genes relevant to mitochondrial diseases, with inadequate coverage of MitoCarta nuclear genes and mtDNA genome, leading to insufficient detection of heteroplasmic mtDNA mutations.
Innovation Solution
A custom whole-exome library is formulated by blending RNA baits from Agilent SureSelectXT 50 Mb All Exon PLUS Targeted Enrichment Kit, a 16-gene nuclear panel, and sequences targeting the entire mtDNA genome, optimized to achieve a 1:100 ratio of mtDNA to nuclear baits for enhanced dual-genome coverage and heteroplasmy detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard whole-exome capture kits are used, then nuclear exome coverage is achieved, but mitochondrial DNA and MitoCarta gene coverage is insufficient
Solution Approach 1:
The patent combines standard whole-exome capture oligonucleotides with custom-designed mitochondrial capture oligonucleotides into a single unified capture kit. This merging allows simultaneous enrichment of both nuclear exome and mitochondrial DNA sequences, resolving the contradiction by achieving comprehensive coverage without requiring separate capture procedures.
Solution Approach 2:
The custom capture kit serves multiple functions: it captures nuclear exome sequences, mitochondrial DNA sequences, and specifically targets MitoCarta genes. This multi-functionality eliminates the need for separate capture kits for nuclear and mitochondrial genomes, improving measurement precision while managing device complexity through a single universal platform.
2Reliability
If off-target capture of mtDNA is allowed in whole-exome kits, then some mitochondrial coverage is obtained, but the coverage is highly non-reproducible and insufficient for reliable heteroplasmy detection
Solution Approach 1:
The patent introduces custom-designed oligonucleotides with specific affinity and sequence complementarity for mitochondrial DNA and MitoCarta genes. This local optimization of capture quality ensures high and reproducible coverage depth across all mitochondrial regions, enabling reliable heteroplasmy detection while maintaining overall kit reliability.
3Measurement precision
If separate methodologies are used for nuclear exome and mitochondrial genome analysis, then comprehensive coverage is achieved, but the diagnostic process becomes more complex and time-consuming
Solution Approach 1:
The patent merges nuclear exome capture and mitochondrial genome capture into a single simultaneous enrichment process using a unified oligonucleotide mixture. This allows both genomes to be sequenced and analyzed in parallel, dramatically improving diagnostic productivity while maintaining comprehensive measurement precision for both nuclear and mitochondrial variants.
Solution Approach 2:
The capture kit functions as a universal platform that handles both nuclear and mitochondrial DNA analysis in one protocol. This multi-functionality eliminates the need for separate methodologies, reducing diagnostic complexity and time while achieving dual-genome coverage through a single streamlined process.
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 custom 'Mito-Plus Whole Exome' capture kit provides optimal coverage for both nuclear and mtDNA genes, enabling reliable detection of mtDNA mutations at low heteroplasmy levels without separate methodologies, improving diagnostic evaluation of mitochondrial diseases.
Implementation Method 1
compositions comprising oligonucleotides that specifically hybridize (e.g., are complementary) with mitochondrial DNA
Data Source
AI summary
Mitochondrial disease genetic diagnostics and methods of use thereof are provided.