Related Experiment Video
Updated: Jul 15, 2026
10:35
DNA-magnetic Particle Binding Analysis by Dynamic and Electrophoretic Light Scattering
Published on: November 9, 2017
DNA gel particles: particle preparation and release characteristics
M Carmen Moran1, M Graça Miguel, Björn Lindman
1Chemistry Department, Coimbra University, Coimbra, Portugal. mcarmen@qui.uc.pt
Langmuir : the ACS Journal of Surfaces and Colloids
|May 10, 2007
Summary
Researchers created DNA gel particles using DNA, a cationic surfactant (CTAB), and lysozyme. Different DNA types showed varied interactions, forming a novel DNA reservoir hydrogel without cross-linkers.
Area of Science:
- Materials Science
- Biotechnology
- Polymer Chemistry
Background:
- Oppositely charged polyelectrolytes in aqueous solutions exhibit associative phase separation, leading to coacervation, gelation, or precipitation.
- This phase separation phenomenon offers potential for novel material fabrication, including hydrogels.
Purpose of the Study:
- To explore the formation of DNA gel particles via interfacial diffusion.
- To investigate the interactions between different forms of DNA (single-stranded and double-stranded) with cationic surfactants and proteins.
- To demonstrate the creation of a DNA reservoir hydrogel using readily available components.
Main Methods:
- Mixing aqueous solutions of DNA (ssDNA or dsDNA) with cationic surfactant (CTAB) and protein (lysozyme).
- Characterization of the resulting DNA gel particles through swelling, surface morphology analysis, and DNA release studies.
- Utilizing interfacial diffusion as the primary mechanism for particle formation.
Main Results:
- Successful formation of DNA gel particles by combining DNA, CTAB, and lysozyme.
- Differential interactions observed between single-stranded DNA (ssDNA) and double-stranded DNA (dsDNA) with CTAB and lysozyme.
- Demonstration of a DNA reservoir hydrogel formed without cross-linkers or organic solvents.
Conclusions:
- The study successfully fabricated DNA gel particles and a DNA reservoir hydrogel using a simple mixing process.
- The distinct interactions of ssDNA and dsDNA with CTAB and lysozyme influence particle properties.
- This method provides a versatile approach for creating DNA-loaded hydrogels for potential applications.
Related Concept Videos
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...
01:22Two-dimensional Gel Electrophoresis
Two-dimensional gel electrophoresis is a high-resolution protein separation method first introduced by O' Farrell and Klose in 1975. This method involves protein separation by two dimensions, mass and charge, making it more accurate than one-dimensional gel electrophoresis.
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
Biological samples, such as cells...
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
Biological samples, such as cells...
01:27SDS-PAGE
Gel electrophoresis is a method that separates biological macromolecules like nucleic acids or proteins by forcing them to pass through a gel matrix under an electric field.
A variation of gel electrophoresis, termed polyacrylamide gel electrophoresis (PAGE), is commonly used for separating proteins according to their molecular size by passing them through a polyacrylamide gel. Because of the varying charges associated with amino acid side chains, PAGE can be used to separate intact proteins...
A variation of gel electrophoresis, termed polyacrylamide gel electrophoresis (PAGE), is commonly used for separating proteins according to their molecular size by passing them through a polyacrylamide gel. Because of the varying charges associated with amino acid side chains, PAGE can be used to separate intact proteins...
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.