Comparison of whole genome amplification methods for further quantitative analysis with microarray-based comparative...

Area of Science:

• Genomics
• Molecular Biology
• Biotechnology

Background:

• Whole genome amplification (WGA) is essential for analyzing limited DNA samples in forensics and diagnostics.
• Various WGA methods exist, but direct comparisons are scarce.

Purpose of the Study:

• To evaluate and compare the performance of different WGA methods.
• To assess ease of use, accuracy, and fidelity of WGA techniques.

Main Methods:

• Compared degenerate oligonucleotide-primed PCR (DOP-PCR), ligation-mediated PCR (LM-PCR), and strand displacement amplification (SDA).
• Assessed WGA methods using microsatellite markers, SNP markers, and array-CGH.
• Utilized karyotype-confirmed amniocytes and SAOS2 cancer cell line DNA.

Main Results:

• DOP-PCR resulted in inaccurate array-CGH results (false positives/negatives).
• SDA demonstrated the simplest performance among the tested methods.
• LM-PCR-amplified DNA most accurately represented the original genomic DNA.

Conclusions:

• LM-PCR is the preferred WGA method for preserving genomic DNA integrity.
• Method selection impacts WGA accuracy and reliability in downstream applications.