Fast onset and high-level neurospecific transgene expression in vivo is of importance for many areas in neuroscience, from basic to translational, and can significantly reduce the amount of vector load required to maintain transgene expression in vivo. In this study, we tested various cis elements to optimize transgene expression at transcriptional, posttranscriptional, and posttranslational le...

Site-specific recombination technologies are powerful new tools for the manipulation of genomic DNA in insects that can improve transgenesis strategies such as targeting transgene insertions, allowing transgene cassette exchange and DNA mobilization for transgene stabilization. However, understanding the fitness cost implications of these manipulations for transgenic strain applications is crit...

Plump et al 1 reported in 1994 that the expression of a human transgene for apoA-I, the major apolipoprotein of HDL, in apoE knockout mice dramatically reduced lesion formation. In the present issue of Circulation, Rong et al2 demonstrate that the composition and structure of advanced atherosclerotic plaques can be significantly altered by the expression of this same transgene. Rong and colleag...

Integration of transgenic DNA into the plant genome was investigated in 13 transgenic oat (Avena sativa L.) lines produced using microprojectile bombardment with one or two cotransformed plasmids. In all transformation events, the transgenic DNA integrated into the plant genome consisted of intact transgene copies that were accompanied by multiple, rearranged, and/or truncated transgene fragmen...

conclusions congenital hyperinsulinism can have different inheritance pattern. autosomal recessive inheritance is more common but less frequently autosomal dominant inheritance can be seen. it appears that mutations in abcc8 gene can show both autosomal recessive and autosomal dominant inheritance of the disease. pcr followed by sanger sequencing proved to be an efficient method for mutation de...

DNA methylation provided one of the first clues to the mechanisms of epigenetic regulation, explaining mysterious phenomena like transgene silencing in plants and oddities of inheritance in maize (Zea mays) and other species. Further research revealed that genomic DNA, and the histones that bundle it into chromatin, can be modified in different ways; these modifications affect gene expression a...

Introduction of DNA sequences into the genome often results in homology-dependent gene silencing in organisms as diverse as plants, fungi, flies, nematodes, and mammals. We previously showed in Cryptococcus neoformans that a repeat transgene array can induce gene silencing at a high frequency during mating (∼50%), but at a much lower frequency during vegetative growth (∼0.2%). Here we report a ...

The bacterial backbone (BB) sequences contained within a canonical plasmid DNA dampen exogenous transgene expression by tenfold to 1,000-fold over a period of a few weeks following transfection into quiescent tissues such as the liver. Minicircle DNA vectors devoid of bacterial plasmid backbone sequences overcome transgene silencing providing persistent transgene expression. Because, we recentl...

High stability of transgene expression is essential for functional genomics studies using transformation approaches and for application of genetic engineering to commercial forestry. We quantified expression of two reporter genes, green fluorescent protein (GFP) and the herbicide bialaphos resistance gene (BAR), in 2256 transgenic poplar trees derived from 404 primary events, and in 106 in vitr...

A high-level expression of a transgene, Ead, encoding the I-Ed alpha-chain is very effective in protection against murine lupus. To investigate the specific contribution of select H-2 haplotypes on the Ead transgene-mediated disease-suppressing effect, we generated H-2 congenic (NZB x BXSB)F1 hybrid mice bearing either H-2b/b, H-2d/b, or H-2d/d haplotype, and compared the transgene-mediated pro...