Transgene introgression into crop weedy/wild relatives can provide natural selective advantages, probably causing undesirable environmental impact. The advantages are likely associated with factors such as transgenes, selective pressure, and genetic background of transgene recipients. To explore the role of the environment and background of transgene recipients in affecting the advantages, we e...

Cre/LoxP technology is widely used in the field of mouse genetics for spatial and/or temporal regulation of gene function. For Cre lines generated via pronuclear microinjection of a Cre transgene construct, the integration site is random and in most cases not known. Integration of a transgene can disrupt an endogenous gene, potentially interfering with interpretation of the phenotype. In additi...

BACKGROUND Conditionally immortalized podocytes are valuable research tools but are difficult to efficiently transfect and do not provide graded transgene expression. METHODS Conditionally immortalized mouse podocyte cell lines were established employing a tetracycline-inducible system. Glomerular cells, isolated from transgenic mice bear- ing two transgenes, NPHS2-reverse tetracycline-contro...

There are now many mammalian examples in which single cell assays of transgene activity have revealed variegated patterns of expression. We have previously reported that transgenes in which globin regulatory elements drive the lacZ reporter gene exhibit variegated expression patterns in mouse erythrocytes, with transgene activity detectable in only a sub-population of circulating erythroid cell...

40 Fast onset and high level neuro-specific transgene expression in vivo is of importance for many 41 areas in neuroscience, from basic to translational, and can significantly reduce the amount of 42 vector load required to maintain transgene expression in vivo. In this study, we tested various cis 43 elements to optimize transgene expression at transcriptional, post-transcriptional and post44 ...

In some lines of transgenic mice, the methylation of MspI sites within or adjacent to the transgene locus is affected by the sex of the parent from which the transgene is inherited. These differences are consistent with a role for DNA methylation in genome imprinting. In a previous report, we noted that in one such line, all offspring of females exhibited hypermethylation of the transgene while...

A lacZ transgene, expressed by the myogenin promoter, was introduced into the mouse hypoxanthine phosphoribosyltransferase (Hprt) locus by gene targeting in embryonic stem cells. Embryos between E10.5-E18.5 days were analyzed for expression of the transgene after staining for beta-galactosidase activity. Transgene expression was restricted to the skeletal muscle lineages reflecting a similar te...

Intranasal vaccination using influenza vectors is a promising approach to developing vaccines against respiratory pathogens due the activation of mucosa-associated immune response. However, there no clear evidence vector design that could be considered preferable. To find optimal structure an with modified NS genomic segment, we constructed four expressing identical transgene sequences inherite...

The patterns of transgene inheritance in plants and the possible explanations for non-Mendelian transmission are reviewed. The non-Mendelian inheritance of a transgene has been recorded with a frequency between 10% and 50% in transgenic plants produced either by Agrobacterium-mediated transformation or through particle bombardment. Different effects such as deletion, duplication, rearrangement,...

Transgenic animals can be broadly defined as animals that contain recombinant DNA molecules in their genome that have been introduced by human intervention (Wall, 1996). Developmental studies and clinically relevant disease models are based on transgenic laboratory animals, most commonly the mouse. In farm animals, transgenic technology is used to produce large quantities of pharmaceutically re...