Comparisons of three automated systems for genomic DNA extraction in a clinical diagnostic laboratory.
OBJECTIVE
The extraction of nucleic acid is initially a limiting step for successful molecular-based diagnostic workup. This study aims to compare the effectiveness of three automated DNA extraction systems for clinical laboratory use.


METHODS
Venous blood samples from 22 healthy volunteers were analyzed using QIAamp Blood Mini Kit (Qiagen), MagNA Pure LC Nucleic Acid Isolation Kit I (Roche), and Magtration-Magnazorb DNA common kit-200N (PSS). The concentration of extracted DNAs was measured by NanoDrop ND-1000 (PeqLab). Also, extracted DNAs were confirmed by applying in direct agarose gel electrophoresis and were amplified by polymerase chain reaction (PCR) for human beta-globin gene.


RESULTS
The corrected concentrations of extracted DNAs were 25.42 +/- 8.82 ng/microL (13.49-52.85 ng/microL) by QIAamp Blood Mini Kit (Qiagen), and 22.65 +/- 14.49 ng/microL (19.18-93.39 ng/microL) by MagNA Pure LC Nucleic Acid Isolation Kit I, and 22.35 +/- 6.47 ng/microL (12.57-35.08 ng/microL) by Magtration-Magnazorb DNA common kit-200N (PSS). No statistically significant difference was noticed among the three commercial kits (p > 0.05). Only the mean value of DNA purity through PSS was slightly lower than others. All the extracted DNAs were successfully identified in direct agarose gel electrophoresis. And all the product of beta-globin gene PCR showed a reproducible pattern of bands.


CONCLUSIONS
The effectiveness of the three automated extraction systems is of an equivalent level and good enough to produce reasonable results. Each laboratory could select the automated system according to its clinical and laboratory conditions.
Lee
Jong-Han
JH
Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea.
Park
Yongjung
Y
Choi
Jong Rak
JR
Lee
Eun Kyung
EK
Kim
Hyon-Suk
HS
D001331:Automation / Q000379:methods; D004247:DNA / Q000097:blood / Q000302:isolation & purification*; D006801:Humans; D016133:Polymerase Chain Reaction; D011933:Reagent Kits, Diagnostic; D015203:Reproducibility of Results
D011933:Reagent Kits, Diagnostic; D004247:DNA