Evaluation genotypes of cancer cell lines HCC1954 and SiHa by short tandem repeat (STR) analysis and DNA sequencing
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Cancer cell lines are used worldwide in biomedical researches, and data interpretation solely depends on unambiguous attribution of those respective cell lines to its original sources. Approximately one-third of all cell lines have an origin other than that assumed, leading to invalid results. It is necessary to characterize the origin of cell lines. Short-tandem-repeat (STR) fingerprinting (DNA fingerprinting) is the method for characterization of genetic identity in cultured cell lines under certain experimental conditions. We showed the fingerprinting profiles in a summed and unidentified human cancer cell line comparison to HCC1954 cell line, revealing marked alterations in DNA fingerprinting profiles up to fourteen STR loci from 16 loci. Furthermore, Sanger DNA sequencing showed no c.3140A > G heterozygous mutation in the PIK3CA gene of this suspected HCC1954 cell line. In addition, we showed the fingerprinting profiles in an unidentified cancer cell line comparison to SiHa cervical cell line, revealing same DNA fingerprinting profiles. In conclusion, we have successfully authenticated and identified both suspected HCC1954 and SiHa cell lines by STR analysis and DNA sequencing. STR analysis combined DNA sequencing may be very useful to evaluate genotypes of cancer cell lines in our cancer studies, as well as in judicial authentication and forensic sciences.
KeywordsQuality control Short-tandem-repeat (STR) Genotype Cancer Cell line Contamination Authentication
The authors thank Prof. Hanchun Chen from Department of Biochemistry, Central South University in China for providing SiHa cell line and Chengdu Lilai Biotechnology Co., Ltd (Chengdu, China) for providing unauthenticated HCC1954 cell line.
This work was supported in part by the National Natural Science Foundation of China (30371493, 31701087, and 81672887), the Southwest Medical University foundation (2016-217-23), and the Joint Research Foundation of Luzhou City and Southwest Medical University (2018).
Compliance with ethical standards
Conflict of interest
The authors declare no conflict of interest.
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