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Visual Detection of Multiple Nucleic Acids in a Capillary Array
Published on: November 15, 2017
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Parallel detection of harmful algae using reverse transcription polymerase chain reaction labeling coupled with
Chunyun Zhang1, Guofu Chen, Chaoshuai Ma
1School of Marine Science and Technology, Harbin Institute of Technology, Weihai, 264209, People's Republic of China.
Environmental Science and Pollution Research International
|December 17, 2013
Summary
A new membrane-based DNA array offers a sensitive and specific method for detecting multiple harmful algal species simultaneously. This approach, using reverse transcription-PCR labeling, shows promise for effective monitoring of aquatic environments.
Area of Science:
- Marine Biology
- Molecular Biology
- Environmental Science
Background:
- Harmful algal blooms (HABs) pose significant economic and health risks globally.
- Traditional microscopic identification of microalgae is inefficient, inaccurate, and unsuitable for parallel species analysis.
- Developing rapid and reliable detection methods for causative microalgae is crucial for HAB management.
Purpose of the Study:
- To investigate the feasibility of a membrane-based DNA array for parallel detection of multiple microalgae species.
- To design and validate species-specific probes for key HAB-forming microalgae.
- To compare the sensitivity of different labeling methods for DNA array detection.
Main Methods:
- Design of five species-specific probes targeting variable regions of the large subunit ribosomal DNA (LSU rDNA).
- Preparation of a membrane-based DNA array by spotting tailed taxonomic probes onto nylon membranes.
- Detection using digoxigenin (Dig)-labeled amplification products from multiple PCR/RT-PCR assays hybridized to the array.
- Comparison of detection sensitivity between DNA-PCR labeling and RT-PCR labeling (RPL).
Main Results:
- Species-specific probes were designed and validated for Heterosigma akashiwo, Chaetoceros debilis, Skeletonema costatum, Prorocentrum donghaiense, and Nitzschia closterium.
- Reverse transcription-PCR labeling (RPL) coupled with hybridization was tenfold more sensitive than DNA-PCR labeling.
- The RPL coupled with the membrane-based DNA array demonstrated specificity, simplicity, and high sensitivity in simulated and natural water samples.
Conclusions:
- RPL coupled with a membrane-based DNA array is a highly effective method for the parallel detection of microalgae.
- This technique offers a promising solution for future monitoring of natural water samples for HABs.
- The developed method overcomes limitations of traditional microscopic analysis for HAB detection.
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