Krõlov K, Uusna J, Grellier T, Andresen L, Jevtuševskaja J, Tulp I, Langel Ü. Implementation of antimicrobial peptides for sample preparation prior to nucleic acid amplification in point-of-care settings.
Expert Rev Mol Diagn 2017;
17:1117-1125. [PMID:
28965426 DOI:
10.1080/14737159.2017.1386557]
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Abstract
BACKGROUND
A variety of sample preparation techniques are used prior to nucleic acid amplification. However, their efficiency is not always sufficient and nucleic acid purification remains the preferred method for template preparation. Purification is difficult and costly to apply in point-of-care (POC) settings and there is a strong need for more robust, rapid, and efficient biological sample preparation techniques in molecular diagnostics.
METHODS
Here, the authors applied antimicrobial peptides (AMPs) for urine sample preparation prior to isothermal loop-mediated amplification (LAMP). AMPs bind to many microorganisms such as bacteria, fungi, protozoa and viruses causing disruption of their membrane integrity and facilitate nucleic acid release.
RESULTS
The authors show that incubation of E. coli with antimicrobial peptide cecropin P1 for 5 min had a significant effect on the availability of template DNA compared with untreated or even heat treated samples resulting in up to six times increase of the amplification efficiency.
CONCLUSION
These results show that AMPs treatment is a very efficient sample preparation technique that is suitable for application prior to nucleic acid amplification directly within biological samples. Furthermore, the entire process of AMPs treatment was performed at room temperature for 5 min thereby making it a good candidate for use in POC applications.
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