Biomaterial Database

METT-1: a karyotypically normal in vitro line of developmentally totipotent mouse teratocarcinoma cells. 1981

B Mintz, and C Cronmiller

A karyotypically normal, chromosomally female (X/X) in vitro line of mouse teratocarcinoma stem cells was established from a malignant mouse teratocarcinoma of the 129/Sv Sl C P inbred strain. The tumor of origin was experimentally induced by ectopic transplantation of a 6-day embryo. The normal number of chromosomes was observed in 92% of metaphases of the cultured cells. This high frequency of euploidy, as well as karyotypic normalcy, were maintained during numerous passages in culture without a feeder-cell layer and after freezing and thawing of the cells. The line has been designated METT-1 (Mouse Euploid Totipotent Teratocarcinoma), signifying that it is the first such in vitro line that has proved (in tests by T. Stewart and B. Mintz, manuscript in preparation) to be developmentally totipotent, i.e., capable of both somatic and germinal differentiation when injected into blastocysts, even after freezing and thawing and prolonged culture. This unique ensemble of properties renders the cell line suitable for selection of specific mutant genes and for gene-transfer experiments in culture, for the purpose of producing from the mutant cells new strains of mice with predetermined genetic changes.

UI	MeSH Term	Description	Entries
D007621	Karyotyping	Mapping of the KARYOTYPE of a cell.	Karyotype Analysis Methods,Analysis Method, Karyotype,Analysis Methods, Karyotype,Karyotype Analysis Method,Karyotypings,Method, Karyotype Analysis,Methods, Karyotype Analysis
D010641	Phenotype	The outward appearance of the individual. It is the product of interactions between genes, and between the GENOTYPE and the environment.	Phenotypes
D002460	Cell Line	Established cell cultures that have the potential to propagate indefinitely.	Cell Lines,Line, Cell,Lines, Cell
D002871	Chromosome Banding	Staining of bands, or chromosome segments, allowing the precise identification of individual chromosomes or parts of chromosomes. Applications include the determination of chromosome rearrangements in malformation syndromes and cancer, the chemistry of chromosome segments, chromosome changes during evolution, and, in conjunction with cell hybridization studies, chromosome mapping.	Banding, Chromosome,Bandings, Chromosome,Chromosome Bandings
D002875	Chromosomes	In a prokaryotic cell or in the nucleus of a eukaryotic cell, a structure consisting of or containing DNA which carries the genetic information essential to the cell. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)	Chromosome
D005260	Female		Females
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013724	Teratoma	A true neoplasm composed of a number of different types of tissue, none of which is native to the area in which it occurs. It is composed of tissues that are derived from three germinal layers, the endoderm, mesoderm, and ectoderm. They are classified histologically as mature (benign) or immature (malignant). (From DeVita Jr et al., Cancer: Principles & Practice of Oncology, 3d ed, p1642)	Dysembryoma,Teratoid Tumor,Teratoma, Cystic,Teratoma, Mature,Teratoma, Benign,Teratoma, Immature,Teratoma, Malignant,Benign Teratoma,Benign Teratomas,Dysembryomas,Immature Teratoma,Immature Teratomas,Malignant Teratoma,Malignant Teratomas,Teratoid Tumors,Teratomas,Teratomas, Benign,Teratomas, Immature,Teratomas, Malignant,Tumor, Teratoid,Tumors, Teratoid
D046508	Culture Techniques	Methods of maintaining or growing biological materials in controlled laboratory conditions. These include the cultures of CELLS; TISSUES; organs; or embryo in vitro. Both animal and plant tissues may be cultured by a variety of methods. Cultures may derive from normal or abnormal tissues, and consist of a single cell type or mixed cell types.	Culture Technique,Technique, Culture,Techniques, Culture
D051379	Mice	The common name for the genus Mus.	Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus