title: Comparisons of three automated systems for genomic DNA extraction in a clinical diagnostic laboratory.
abstract: 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.
authors.affiliation: Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Jong-Han
authors.initials: JH
authors.lastname: Lee
authors.forename: Yongjung
authors.initials: Y
authors.lastname: Park
authors.forename: Jong Rak
authors.initials: JR
authors.lastname: Choi
authors.forename: Eun Kyung
authors.initials: EK
authors.lastname: Lee
authors.forename: Hyon-Suk
authors.initials: HS
authors.lastname: Kim
mesh_terms: 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
chemical_list: D011933:Reagent Kits, Diagnostic; D004247:DNA