Abstract
The current method for cell line authentication is genotyping based on short tandem repeat (STR)-PCR involving coamplification of a panel of STR loci by multiplex PCR and downstream fragment length analysis (FLA), usually performed by capillary electrophoresis. FLA by capillary electrophoresis is time-consuming and can be expensive, as the facilities are generally not accessible for many research laboratories. In the present study, a microfluidic electrophoresis system, the Agilent 2100 Bioanalyzer, was used to analyze the STR-PCR fragments from 10 human genomic loci of a number of human cell lines, including 6 gliomas, 1 astrocyte, 1 primary lung cancer, 1 lung brain metastatic cancer, and 1 rhabdomyosarcoma; and this was compared with the standard method, that is, capillary electrophoresis, using the Applied Biosystems 3130xl Genetic Analyzer. The microfluidic electrophoresis method produced highly reproducible results with good sensitivity in sizing of multiple PCR fragments, and each cell line demonstrated a unique DNA profile. Furthermore, DNA fingerprinting of samples from 5 different passage numbers of the same cell line showed excellent reproducibility when FLA was performed with the Bioanalyzer, indicating that no cros...Continue Reading
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