Acta Anatomica Sinica ›› 2019, Vol. 50 ›› Issue (2): 201-210.doi: 10.16098/j.issn.0529-1356.2019.02.010

• Cancer Biology • Previous Articles     Next Articles

Troubles and answers of identity authentication of human tumor cell lines established in China

BIAN Xiao-cui LIU Yu-qin* YANG Zhen-li FENG Hai-liang   

  1. Department of Pathology, Cell Resource Center,Institute of Basic Medical Sciences,Chinese Academy of Medical Sciences and School of Basic Medicine, Peking Union Medical College, Beijing 100005, China
  • Received:2018-01-23 Revised:2018-03-08 Online:2019-04-06 Published:2019-04-06
  • Contact: LIU Yu-qin E-mail:liuyuqin@pumc.edu.cn

Abstract:

Objective To authenticate the identity of human tumor cell lines established in China and make sure the authenticated cell lines will be used in science and technology research in China. Methods We collected and extracted genomic DNA of those tumor cells, amplify short tandem repeat (STR) loci by PCR and performed electrophoretic analysis to get STR profiles (as the DNA finger print of the cell line). Comparing their STR profiles against international STR database and those of their donor tissues, crosscontaminated cell lines will be excluded from the service list. PCR detection of human papilloma virus type 18(HPV-18)fragment were performed to double check HeLa crosscontaminated cell lines. Suspected cells contaminated by T leukemia cells were checked by detection characteristics of T cells, such as expression of some surface markers. Results Altogether 46 samples of 37 human tumor cell lines were collected from different labs. All 6 cell lines established in our center showed identical STR profile with their original tissue or primary culture. Among the tumor cell lines established by others 8 cell lines showed unique STR profile, indicating authentic. The other 23 (62.2%) of them showed identical STR with HeLa or with high evaluation value (EV) value, HPV fragment were found in their genomic DNA indicating replacement by or hybrid with HeLa. Some tumor cell lines established in China were cross-contaminated by human colorectal cancer cell line HCT-8, cervical squamous cancer line SiHa, T leukemia cell line CCRF-CEM and a rat cell line. Conclusion A large proportion of human tumor cell lines established by Chinese scholars were cross-contaminated. So scientists must first do authenticate these cell lines before experiments or obtain cell lines from China Infra-structure of Cell Line Resource. Furthermore, when trying to establish cell lines, preserve original tissue/DNA for future authentication.

Key words: Short tandem repeat DNA typing, Cross-contamination, Characterization, PCR, Tumor cell, Cell culture, Human