Related Experiment Video
Updated: May 17, 2026
10:51
Microscale Vortex-assisted Electroporator for Sequential Molecular Delivery
Published on: August 7, 2014
Genomic DNA extraction from cells by electroporation on an integrated microfluidic platform
Tao Geng1, Ning Bao, Nammalwar Sriranganathanw
1Department of Agricultural and Biological Engineering, Purdue University, West Lafayette, Indiana 47907, United States.
Analytical Chemistry
|October 16, 2012
Summary
Electrical lysis offers a fast, purely physical method for DNA extraction, comparable to chemical methods. This technique shows promise for genetic analysis, especially in ultrasensitive assays requiring minimal sample preparation.
Area of Science:
- Biotechnology
- Molecular Biology
- Genomics
Background:
- Chemical lysis is standard for DNA extraction but reagents interfere with downstream processes.
- Electrical lysis via irreversible electroporation is a fast, physical alternative.
- Lack of experimental data on electrical lysis efficiency for genomic DNA extraction, particularly from eukaryotic cells.
Purpose of the Study:
- To experimentally validate electrical lysis for reproducible and efficient genomic DNA extraction.
- To compare electrical lysis efficiency against chemical lysis for eukaryotic and bacterial cells.
- To develop an integrated microfluidic chip for cell trapping, electrical lysis, and DNA purification.
Main Methods:
- Construction of an integrated microfluidic chip for cell manipulation.
- Application of electrical pulses for irreversible electroporation and cell lysis.
- Purification and concentration of genomic DNA using beads.
- Quantification of DNA extraction efficiency for eukaryotic and bacterial cells.
Main Results:
- Electrical lysis achieved high DNA extraction efficiency comparable to chemical lysis: up to ~36% for Chinese hamster ovary cells and ~45% for Salmonella typhimurium.
- DNA extraction efficiency was dependent on electrical parameters and the amount of DNA-binding beads.
- The integrated chip successfully lysed cells and purified DNA rapidly.
Conclusions:
- Electrical lysis is a viable and efficient method for genomic DNA extraction from both eukaryotic and bacterial cells.
- Electroporation-based DNA extraction offers advantages for ultrasensitive assays due to minimal dilution and simple procedures.
- This physical lysis technique eliminates the need for chemical reagents, simplifying downstream genetic analysis.
Related Concept Videos
01:24DNA Isolation
DNA isolation protocols can be fast and straightforward or complex and time-consuming depending on the type and quality of DNA required for further processing. For example, plasmid DNA extraction is a bit more complicated than genomic DNA extraction because of the need for an appropriate lysis method to separate plasmid DNA from gDNA during isolation. However, for specific applications, such as long-range DNA sequencing that require a good yield of high- quality DNA samples, we need to follow...
01:34DNA Isolation
DNA from cells is required for many biotechnology and research applications, such as molecular cloning. To remove and purify DNA from cells, researchers use various methods of DNA extraction. While the specifics of different protocols may vary, some general concepts underlie the process of DNA extraction.
00:58Genomic DNA in Eukaryotes
Eukaryotes have large genomes compared to prokaryotes. To fit their genomes into a cell, eukaryotic DNA is packaged extraordinarily tightly inside the nucleus. To achieve this, DNA is tightly wound around proteins called histones, which are packaged into nucleosomes that are joined by linker DNA and coil into chromatin fibers. Additional fibrous proteins further compact the chromatin, which is recognizable as chromosomes during certain phases of cell division.
02:35DNA Agarose Gel Electrophoresis
Agarose gel electrophoresis is a laboratory technique commonly used to separate DNA fragments by size. However, it can also be used to isolate and purify DNA fragments using a gel extraction protocol.
Gel extraction follows five major steps: running gel electrophoresis to separate fragments, isolating the individual bands, extracting DNA from those bands, and removing the dye and salts from the extracted mixture to obtain pure DNA.
In cloning experiments, both the insert and vector DNA...
Gel extraction follows five major steps: running gel electrophoresis to separate fragments, isolating the individual bands, extracting DNA from those bands, and removing the dye and salts from the extracted mixture to obtain pure DNA.
In cloning experiments, both the insert and vector DNA...