Single-Step Cell Lysis for High Molecular Weight DNA
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Solution Overview
Problem
Conventional cell lysis methods often result in DNA shearing, making it unsuitable for PCR amplicons longer than a few hundred bases, and are cumbersome and time-consuming, especially for CRISPR applications and microbiome research, where proportional representation of diverse microbial DNA is needed.
Innovation Solution
A method combining heat, detergent, and base in a single step, using an ionic detergent and a base that precipitates the detergent, allowing for rapid and simultaneous lysis of cells, minimizing DNA damage and enabling the extraction of high molecular weight genomic DNA suitable for medium to high molecular weight PCR products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional cell lysis methods are used, then cells are lysed and DNA is released, but DNA shearing occurs making it unsuitable for PCR amplicons longer than a few hundred bases
Solution Approach 1:
The patent combines heat lysis, detergent lysis, and base treatment into a single integrated step, where all three components are applied simultaneously to achieve effective cell lysis while preserving high molecular weight DNA. This merging of previously sequential or separate lysis methods into one coordinated process prevents DNA shearing while maintaining lysis efficiency.
2Manufacturing precision
If gentle methods are used to produce high molecular weight DNA, then DNA integrity is preserved, but the process is more cumbersome and time consuming
Solution Approach 1:
The patent optimizes specific parameters including heating temperature (65-95°C for 5-30 minutes), detergent concentration (0.1-10% SDS), and base concentration (0.05-1M NaOH or KOH) to achieve rapid lysis while preserving high molecular weight DNA. By carefully controlling these parameters, the method accomplishes in minutes what previously required lengthy gentle procedures.
3Productivity
If multiple lysis methods are used in sequential steps, then complete lysis is achieved, but the number of steps and hands-on time increase
Solution Approach 1:
The patent merges heat treatment, detergent addition, and base treatment into a single simultaneous lysis step. The lysis buffer contains both detergent (e.g., SDS) and base (e.g., NaOH or KOH), and heating is applied to the entire mixture, combining three separate lysis mechanisms into one coordinated process that achieves complete lysis without requiring sequential操作步骤.
4Productivity
If detergent and base are used separately in sequential steps, then cell lysis is achieved, but the protocol requires multiple steps and extra processing
Solution Approach 1:
The patent formulates a single lysis buffer containing both detergent (0.1-10% SDS) and base (0.05-1M NaOH or KOH) that works synergistically. This combined buffer is applied in one step along with heating, eliminating the need for separate detergent treatment followed by separate base treatment steps, thereby simplifying the protocol while maintaining lysis effectiveness.
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 significantly reduces the number of steps and hands-on time, yields improved representation of genomic DNA, and allows for the preparation of high-quality DNA for CRISPR applications and microbiome research, enabling the screening of large regions of cellular modifications.
Implementation Method 1
heating the aqueous solution to at least 50° C. for a time effective to dissolve the ionic detergent
Implementation Method 2
mixing an aqueous solution containing modified biologic cells with (i) an ionic detergent and (ii) a base capable of precipitating the ionic detergent
Implementation Method 3
cooling the aqueous solution to 40° C. or less for a time effective to precipitate the ionic detergent
Data Source
AI summary
Disclosed are methods for lysis of cells that combine three lysis steps—(1) heat, (2) detergent and (3) base—into a single step and that can be completed in a short period of time, e.g., a few minutes. The methods combine a normally incompatible detergent and base lysis, allow for simplified removal of detergent after lysis, and importantly, limits damage to DNA, such as shearing, that typically results from separate application of conventional lysis methods, yielding improved quality and quantities of genomic DNA (gDNA).