title: Establishment of a set of combined immunodeficient DA/Slc-Foxn1(rnu) Lyst(bg) congenic rat strains.
abstract: The congenitally athymic nude rat is used for studying cancer and transplantation owing to its hairlessness and T-cell defective function caused by the Foxn1(rnu) gene. However, NK cell activity of the nude rat is markedly increased. It is known that NK cells play a major role in rejection of xenografts and in cytotoxicity against tumor cells. Thus, the athymic nude rat with impaired NK cell activity should be a useful model for extensive studies. The DA-Lyst(bg)/Lyst(bg) rat, a model for human Chediak-Higashi syndrome (CHS) is characterized by diluted-coat color and impairment of NK cell activity. We planned to establish a combined immunodeficient double mutant rat introgressed with the Foxn1(rnu) and Lyst(bg) genes and a set of congenic strains having an identical genetic backgrounds simultaneously. Based on the phenotypic and genetic characteristics of the parental rat strains, the new strains were produced using continuous backcross and diagnosis with molecular genetic techniques. Each disease gene was diagnosed with PCR-RFLP or the long-nested PCR method. Furthermore, we used a marker-assisted congenic strategy based on scanning the genetic backgrounds of the parental rats with 461 rat microsatellite markers. We think that the newly established DA/Slc-Foxn1(rnu)/Foxn1(rnu) Lyst(bg)/Lyst(bg) double mutant will be useful as a severe disease model for human CHS, and the set of DA/Slc-Foxn1(rnu) Lyst(bg) congenic strains which have impaired NK cell activity and/or defective T cell function should be useful for studying in cancer research, xenotransplantation, immune function and other wide-ranging studies.
authors.affiliation: Japan SLC, Inc., Hamamatsu, Shizuoka, Japan.
authors.forename: Norio
authors.initials: N
authors.lastname: Masui
authors.forename: Tetsu
authors.initials: T
authors.lastname: Nishikawa
authors.forename: Yumie
authors.initials: Y
authors.lastname: Takagi
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Kimura
authors.forename: Masayuki
authors.initials: M
authors.lastname: Mori
authors.forename: Shigeo
authors.initials: S
authors.lastname: Yokose
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Asai
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Gonda
authors.forename: Makoto
authors.initials: M
authors.lastname: Yanabe
authors.forename: Katsunori
authors.initials: K
authors.lastname: Sato
mesh_terms: D000818:Animals; D020296:Animals, Congenic; D002609:Chediak-Higashi Syndrome / Q000235:genetics / Q000276:immunology; D004268:DNA-Binding Proteins / Q000235:genetics*; D004195:Disease Models, Animal; D051858:Forkhead Transcription Factors; D007694:Killer Cells, Natural / Q000276:immunology; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D011506:Proteins / Q000235:genetics*; D051381:Rats; D011922:Rats, Mutant Strains; D016511:Severe Combined Immunodeficiency / Q000235:genetics* / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology; D014157:Transcription Factors / Q000235:genetics*
chemical_list: D004268:DNA-Binding Proteins; D051858:Forkhead Transcription Factors; C491134:Lyst protein, rat; D011506:Proteins; D014157:Transcription Factors; C090140:Whn protein