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Inducible gene expression in fetal thymic epithelium: a new BAC transgenic model.
We were interested in developing an in vivo model in which exogenous gene expression could be transiently induced in embryonic TEC (Tet-On system). To this end, we have generated a bacterial artificial chromosome (BAC) transgenic mouse line in which the reverse tetracycline-dependent transactivator...
Generation of a novel germline stem cell line expressing a germline-specific reporter in the mouse.
We established GS cell lines from neonatal testes of transgenic mice that express the fluorescent protein, Venus, whose gene expression is driven by the promoter of Mvh (mouse Vasa homolog), a gene highly specific to mammalian germ cells. This novel cell line has genuine GS cell properties equivalen...
The molecular genetics of avian sex determination and its manipulation.
We discuss the current knowledge of sex determination and sexual differentiation in avians, using chicken as model. We review how sex chromosomes contribute to this process and provide current information on our understanding of gonadal sexual differentiation at both the cellular and molecular level...
Long-term, inducible gene loss-of-function in the chicken embryo.
The use of shRNAmir to down-regulate the expression of genes of interest is a powerful tool for studying gene function during early chick development. However, because of the limitations of electroporation-mediated transgenesis, the down-regulation of genes expressed at late stages of development in...
The KRAB domain zinc finger protein, Zfp157, is expressed in multiple tissues during mouse embryogenesis and in specific cells in adult mamm...
We have identified a new member of this family, Zfp157, as a downstream target of the transcription factor Stat6 in mammary gland. Using a gene-trap approach, we have generated mice harboring a Zfp157-LacZ reporter gene. We have characterized the expression of this reporter during mouse embryogenesi...
Transcriptional networks that mediate signals from reproductive tissues to influence lifespan.
Aging and reproduction are two defining features of our life. Historically, research has focused on the well-documented decline in reproductive capacity that accompanies old age, especially with increasing maternal age in humans. However, recent experiments in model organisms such as worms, flies, a...
Temporally controlled targeted somatic mutagenesis in mouse eye pigment epithelium.
We generated a TRP1-Cre-ER(T2) transgenic mouse line that expresses the tamoxifen-dependent Cre-ER(T2) recombinase under the control of the tyrosinase-related protein 1 (TRP1) promoter. Cre-ER(T2) transcripts were readily detected in the retinal pigment epithelium (RPE), and tamoxifen treatment of a...
Understanding ciliated epithelia: the power of Xenopus.
We address the fundamental advances in understanding ciliated epithelia that have been achieved using Xenopus as a model system. Xenopus embryos are covered with a ciliated epithelium that propels fluid unidirectionally across their surface. The external nature of this tissue, coupled with the molec...
The epigenome in early vertebrate development.
Epigenetic regulation defines the commitment and potential of cells, including the limitations in their competence to respond to inducing signals. This review discusses the developmental origins of chromatin state in Xenopus and other vertebrate species and provides an overview of its use in genome...