title: Establishment of a novel embryonic stem cell line by a modified procedure.
abstract: To generate mutant mice, embryonic stem (ES) cells are used as a vehicle for introducing mutations. The establishment of ES cells is difficult because it requires specific skills and it is time-consuming. We established a novel ES cell line derived from hybrid mice between C57BL/6 and DBA/2 using a modified method. To collect a large number of preimplantational embryos, we collected embryos at the 8-cell stage and cultured them to blastocysts, whereas the usual procedure of preparing the delayed blastocysts demands technical skills. To eliminate unnecessary female cells at an initial stage of inner cell mass culture, male clones were selected by polymerase chain reaction to detect the mouse Sry gene. The established ES cell line efficiently contributed to the germ-line when injected into 8-cell embryos of ICR mice. This potency was maintained after manipulation throughout gene targeting.
authors.affiliation: Discovery Research Laboratories II, Takeda Chemical Industries Ltd., Ibaraki, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Tojo
authors.forename: M
authors.initials: M
authors.lastname: Nishida
authors.forename: K
authors.initials: K
authors.lastname: Matsuoka
authors.forename: K
authors.initials: K
authors.lastname: Igarashi
authors.forename: O
authors.initials: O
authors.lastname: Shiho
mesh_terms: D000818:Animals; D001755:Blastocyst / Q000166:cytology; D018929:Cell Culture Techniques / Q000379:methods; D002460:Cell Line; D003433:Crosses, Genetic; D004268:DNA-Binding Proteins / Q000235:genetics; D005260:Female; D018390:Gene Targeting; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D008813:Mice, Inbred ICR; D018345:Mice, Knockout; D009687:Nuclear Proteins; D016133:Polymerase Chain Reaction; D051876:Sex-Determining Region Y Protein; D013234:Stem Cells / Q000166:cytology*; D014157:Transcription Factors
chemical_list: D004268:DNA-Binding Proteins; D009687:Nuclear Proteins; D051876:Sex-Determining Region Y Protein; C497746:Sry protein, mouse; D014157:Transcription Factors