title: Generation of reversible Rb-knockdown mice.
abstract: This study describes the generation of reversible Rb-knockdown mice using Tet-off system coupled with Rb-deficient mice currently available. Mice expressing pRB conditionally in Rb-/- background were generated by crossings P(hCMV)-tTA/TRE-Rb transgenic mice with conventional Rb+/- mice. Transgenic Rb was tightly controlled with reversibility and biologically effective as exemplified by cyclin E expression in a doxycycline-dependent manner in mouse embryonic fibroblasts. However, its ectopic expression was not sufficient to rescue the phenotypes of Rb-/- embryos at organismal level, suggesting the requirement of more sophisticated regulation of pRB. With all, these results demonstrate that our experimental strategy can be an alternative way to convert classical gene-disrupted mice into reversible conditional ones.
authors.affiliation: Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Samsung Biomedical Research Institute, 300 Chonchon-Dong, Changan-Gu, Suwon 440-746, Republic of Korea.
authors.forename: Yoon Sik
authors.initials: YS
authors.lastname: Choi
authors.forename: Jae Eun
authors.initials: JE
authors.lastname: Lee
authors.forename: Cheolho
authors.initials: C
authors.lastname: Cheong
authors.forename: Young Hoon
authors.initials: YH
authors.lastname: Sung
authors.forename: Eun Young
authors.initials: EY
authors.lastname: Yang
authors.forename: Chan Bae
authors.initials: CB
authors.lastname: Park
authors.forename: Jaewhan
authors.initials: J
authors.lastname: Song
authors.forename: Sang Chul
authors.initials: SC
authors.lastname: Park
authors.forename: Han-Woong
authors.initials: HW
authors.lastname: Lee
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D004622:Embryo, Mammalian / Q000033:anatomy & histology / Q000502:physiology; D018507:Gene Expression Regulation, Developmental; D051379:Mice; D018345:Mice, Knockout; D008822:Mice, Transgenic; D010641:Phenotype; D016160:Retinoblastoma Protein / Q000235:genetics / Q000378:metabolism*; D019076:Transgenes
chemical_list: D016160:Retinoblastoma Protein