title: Generation of mice with a 200-kb amyloid precursor protein gene deletion by Cre recombinase-mediated site-specific recombination in embryonic stem cells.
abstract: Gene disruptions and deletions of up to 20kb have been generated by homologous recombination with appropriate targeting vectors in murine embryonic stem (ES) cells. Because we could not obtain a deletion of about 200 kb in the mouse amyloid precursor protein gene by the classical technique, we employed strategies involving the insertion of loxP sites upstream and downstream of the region to be deleted by homologous recombination and elicited excision of the loxP-flanked region by introduction of a Cre expression vector into the ES cells. In the first approach, the loxP sequences were inserted in two successive steps and after each step, ES cell clones were isolated and characterized. Deletion of the loxP-flanked sequence was accomplished by introducing the cre gene in a third step. In the second approach, ES cells containing the upstream loxP cassette were electroporated simultaneously with the downstream loxP targeting vector and the Cre expression plasmid. ES cells were obtained that gave rise to chimeric mice capable of germ-line transmission of the deleted amyloid precursor protein allele.
authors.affiliation: Institut für Molekularbiologie der Universität Zürich, Switzerland.
authors.forename: Z W
authors.initials: ZW
authors.lastname: Li
authors.forename: G
authors.initials: G
authors.lastname: Stark
authors.forename: J
authors.initials: J
authors.lastname: Götz
authors.forename: T
authors.initials: T
authors.lastname: Rülicke
authors.forename: M
authors.initials: M
authors.lastname: Gschwind
authors.forename: G
authors.initials: G
authors.lastname: Huber
authors.forename: U
authors.initials: U
authors.lastname: Müller
authors.forename: C
authors.initials: C
authors.lastname: Weissmann
mesh_terms: D000595:Amino Acid Sequence; D016564:Amyloid beta-Protein Precursor / Q000235:genetics*; D000818:Animals; D001483:Base Sequence; D004254:DNA Nucleotidyltransferases / Q000378:metabolism*; D017931:DNA Primers; D004622:Embryo, Mammalian / Q000166:cytology / Q000378:metabolism*; D017353:Gene Deletion; D019426:Integrases; D051379:Mice; D008817:Mice, Mutant Strains; D008969:Molecular Sequence Data; D011995:Recombination, Genetic; D013234:Stem Cells / Q000378:metabolism*; D014764:Viral Proteins
chemical_list: D016564:Amyloid beta-Protein Precursor; D017931:DNA Primers; D014764:Viral Proteins; C045073:Cre recombinase; D004254:DNA Nucleotidyltransferases; D019426:Integrases