Journal
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
Volume 93, Issue 4, Pages 788-793Publisher
WILEY
DOI: 10.1002/jsfa.5798
Keywords
magnetic nanoparticle (MNP); genomic DNA; food and environmental samples
Funding
- Department of Science and Technology, Government of India [SR/NM/NS-48/2009]
- University of Kalyani, Nadia, West Bengal
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BACKGROUND: Isolation of high-molecular-weight DNA is essential for many molecular biology applications. Owing to the presence of polymerase chain reaction (PCR) inhibitors, there is a scarcity of suitable protocols for PCR-ready DNA extraction from food and natural environments. The conventional chemical methods of DNA extraction are time consuming and laborious and the yield is very low. Thus the aim of this research was to develop a simple, rapid, cost-effective method of genomic DNA extraction from food (milk and fruit juice) and environmental (pond water) samples and to detect bacterial contaminants present in those samples. RESULTS: This approach is efficient for both Gram-positive and Gram-negative bacteria from all the studied samples. Herein super paramagnetic bare iron oxide nanoparticles were implemented for bacterial genomic DNA isolation. The method was also compared to the conventional phenolchloroform method in the context of quality, quantity and timing process. This method took only half an hour or less to obtain high-molecular-weight purified DNA from minimum bacterial contamination. Additionally, the method was directly compatible to PCR amplification. CONCLUSION: The problem of availability of suitable generalized methods for DNA isolation from various samples including food and environmental has been solved by a nanobiotechnological approach that may prove to be extremely useful in biotechnological applications. (c) 2012 Society of Chemical Industry
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