title: Malignancy-related characteristics of wild type and drug-resistant Chinese hamster ovary cells.
abstract: Chinese hamster ovary (CHO) cell lines are a very popular cell model for a wide range of studies but are often misused experimentally as a substitute for normal cells. Although CHO was originally derived from normal tissue, the cell lines studied here, including the parental wild type, have many characteristics which indicate that they have undergone malignant transformation. Biological properties associated with malignancy were investigated in this study on wild type CHO cells and 4 drug resistant sublines, EOT, Col R-22, Pod R11-6, and Vin R-1. We report evidence of tumorigenicity in experimental animals, invasive capacity, in vivo and in vitro, protease release by 2 of the cell lines, features related to drug resistance in the mutant sublines, and numerical and structural chromosomal abnormalities.
authors.affiliation: University of Sydney.
authors.forename: W B
authors.initials: WB
authors.lastname: Mackinnon
authors.forename: M
authors.initials: M
authors.lastname: Dyne
authors.forename: R
authors.initials: R
authors.lastname: Hancock
authors.forename: A J
authors.initials: AJ
authors.lastname: Grant
authors.forename: P
authors.initials: P
authors.lastname: Russell
authors.forename: C E
authors.initials: CE
authors.lastname: Mountford
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000818:Animals; D016466:CHO Cells / Q000737:chemistry / Q000187:drug effects / Q000201:enzymology / Q000473:pathology*; D002352:Carrier Proteins / Q000032:analysis; D002471:Cell Transformation, Neoplastic / Q000473:pathology*; D002869:Chromosome Aberrations / Q000235:genetics; D006224:Cricetinae; D004351:Drug Resistance / Q000235:genetics; D010450:Endopeptidases / Q000378:metabolism*; D008562:Membrane Glycoproteins / Q000032:analysis; D051379:Mice; D008819:Mice, Nude; D009361:Neoplasm Invasiveness; D012513:Sarcoma, Experimental / Q000473:pathology*; D012983:Soft Tissue Neoplasms / Q000473:pathology*
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D002352:Carrier Proteins; D008562:Membrane Glycoproteins; D010450:Endopeptidases