Abstract：
:Short directly-repeated (DR) DNA enhancer elements of plant viral origin were analyzed for their ability, both individually and in combination, to influence in vivo transcription when inserted upstream from a minimal CaMV35S promoter. Synthetic promoters containing multiple copies and/or combinations of DR cassettes were tested for their effect upon reporter gene (luciferase) expression using an Agrobacteria-based leaf-infiltration transient assay and within stably transformed plants (Nicotiana tabacum). Transgenic plants harboring constructs containing different numbers or combinations of DR cassettes were further tested to look for tissue-specific expression patterns and potential promoter response to the infiltration process employed during transient expression. Multimerization of DR elements produced enhancer activity that was in general additive, increasing reporter activity in direct proportion to the number of DR cassettes within the test promoter. In contrast, combinations of different DR cassettes often functioned synergistically, producing reporter enhancement markedly greater then the sum of the combined DR activities. Several of the DR constructs responded to Agrobacteria (lacking T-DNA) infiltration of transgenic leaves by an induction (2 elements) or reduction (1 element) in reporter activity. Combinations of DR cassettes producing the strongest enhancement of reporter activity were used to create two synthetic promoters (SynPro3 and SynPro5) that drive leaf reporter activities at levels comparable to the CaMV35S promoter. Characterization of these synthetic promoters in transformed tobacco showed strong reporter expression at all stages of development and in most tissues. The arrangement of DR elements within SynPro3 and SynPro5 appears to play a role in defining tissue-specificity of expression and/or Agrobacteria-infusion responsiveness.
journal_name
Transgenic Resjournal_title
Transgenic researchauthors
Cazzonelli CI,Velten Jdoi
10.1007/s11248-007-9117-8subject
Has Abstractpub_date
2008-06-01 00:00:00pages
437-57issue
3eissn
0962-8819issn
1573-9368journal_volume
17pub_type
杂志文章abstract：:Plants of strawberry (cultivar Pájaro) were transformed with three defense related genes: ch5B, gln2 and ap24 using Agrobacterium tumefaciens. The ch5B gene encodes for a chitinase from Phaseolus vulgaris, while gln2 and ap24 encode for a glucanase and a thaumatin-like protein, respectively, both from Nicotiana tabacu...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-005-2543-6
更新日期：2006-02-01 00:00:00
abstract：:There has been considerable interest in pursuing phospholamban as a putative therapeutic target for overcoming depressed calcium handling in human heart failure. Studies predominantly done in mice have shown that phospholamban is a key regulator of sarcoplasmic reticulum calcium cycling and cardiac function. However, ...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-007-9139-2
更新日期：2008-04-01 00:00:00
abstract：:Carbonic anhydrase VI (CAVI) is the only secreted isozyme of the α-carbonic anhydrase family, which catalyzes the reversible reaction [Formula in text]. It appears that CAVI protects teeth and gastrointestinal mucosa by neutralizing excess acidity. However, the evidence for this physiological function is limited, and ...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-010-9441-2
更新日期：2011-06-01 00:00:00
abstract：:Vitis vinifera L. cv. 'Thompson Seedless' presents a type of stenospermocarpy in grape where fertilization occurs but seeds abort and fail to develop. To unravel the molecular basis for stenospermocarpy in grapes, subtractive hybridization was carried out in order to isolate differentially regulated genes that partici...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-006-9044-0
更新日期：2007-08-01 00:00:00
abstract：:Chemical inducible gene regulation systems provide essential tools for the precise regulation of transgene expression in plants and animals. Recent development of a two-hybrid ecdysone receptor (EcR) gene regulation system has solved some of the drawbacks that were associated with the monopartate gene switch. To furth...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-006-9054-y
更新日期：2007-10-01 00:00:00
abstract：:Vesicular stomatitis virus glycoprotein (VSVG) pseudotyped murine leukemia virus (MLV) virions can transduce schistosomes, leading to chromosomal integration of reporter transgenes. To develop VSVG-MLV for functional genomics in schistosomes, the influence of the chicken β-globin cHS4 element, a prototypic chromatin i...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-011-9556-0
更新日期：2012-06-01 00:00:00
abstract：:To examine the consequences of increased apolipoprotein A-I production on cholesterol and lipoprotein metabolism, we have produced two lines of transgenic rats; one expressing moderate and one very high levels of human apolipoprotein A-I. The rats were produced by microinjection of a 13 kbp DNA fragment containing the...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/BF02528779
更新日期：1992-05-01 00:00:00
abstract：:The genes that regulate the formation of blood vessels in adult tissues represent promising therapeutic targets because angiogenesis plays a role in many diseases, including cancer. We wished to develop a mouse model allowing characterization of gene function in adult angiogenic vasculature while minimizing effects on...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-007-9156-1
更新日期：2008-06-01 00:00:00
abstract：:Soybean was used as a model for studies of chemical induction of gene expression in seeds. A chimeric transcriptional activator, VGE, driven by the soybean seed glycinin G1 promoter, was used to induce the expression of an ER-targeted GFP(KDEL) reporter protein upon addition of the chemical ligand, methoxyfenozide. Th...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-010-9377-6
更新日期：2010-12-01 00:00:00
abstract：:Use of huge amounts of antibiotics in farm animal production has promoted the prevalence of antibiotic-resistant bacteria, which poses a serious threat to public health. Therefore, alternative approaches are needed to reduce or replace antibiotic usage in the food animal industry. PR-39 is a pig-derived proline-rich a...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-018-0084-z
更新日期：2018-10-01 00:00:00
abstract：:Lettuce big-vein disease is caused by Mirafiori lettuce virus (MiLV), which is vectored by the soil-borne fungus Olpidium brassicae. A MiLV-resistant transgenic lettuce line was developed through introducing inverted repeats of the MiLV coat protein (CP) gene. Here, a detailed characterization study of this lettuce li...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-009-9300-1
更新日期：2010-04-01 00:00:00
abstract：:Seedling stand establishment is a critical factor affecting crop yield in low-precipitation agricultural regions. This is especially true for small seeded crops, such as Camelina (Camelina sativa) and canola (Brassica napus), that need to be planted shallow. Deeper planting would be desirable so that seeds can access ...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-020-00208-9
更新日期：2020-08-01 00:00:00
abstract：:A retrospective analysis of transgenesis rates obtained in seven pronuclear microinjection programs was undertaken to determine if a relationship existed between the amount of DNA injected and transgenesis rates in the pig. Logistic regression analysis showed that as the concentration of DNA injected increased from 1 ...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1023/a:1013007329936
更新日期：2001-12-01 00:00:00
abstract：:The silk gland of silkworm Bombyx mori, is one of the most important organs that has been fully studied and utilized so far. It contributes finest silk fibers to humankind. The silk gland has excellent ability of synthesizing silk proteins and is a kind tool to produce some useful recombinant proteins, which can be wi...
journal_title：Transgenic research
pub_type： 杂志文章,评审
doi：10.1007/s11248-014-9826-8
更新日期：2014-10-01 00:00:00
abstract：:The isopentenyl transferase gene (ipt) from Agrobacterium tumefaciens was isolated and introduced, via a disarmed binary vector, into tobacco using the Agrobacterium tumefaciens-mediated gene transfer system. The expression of the ipt gene was monitored by RNA hybridization, western blotting and cytokinin analysis. Th...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/BF01979922
更新日期：1996-01-01 00:00:00
abstract：:Green fluorescent protein (GFP) transgenic animals are widely used in biomedical research. We observed that the commonly used beta-actin-GFP transgenic mouse has renal defects with proteinuria starting as early as 5 weeks of age. Histological analysis reveals a widespread increase in glomerular extracellular matrix, o...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-007-9107-x
更新日期：2007-12-01 00:00:00
abstract：:We report here knock-in of diphteria toxin A chain (dta) gene at the Ins2 locus, using the strategy previously employed to insert lacZ under control of the Ins2 promoter. Mutant Ins2(dta/+), Ins2(dta/lacZ) or Ins2(lacZ/+) mouse pups were generated by breeding and analyzed to study the effects of toxigenetic beta-cell ...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-004-9587-x
更新日期：2004-10-01 00:00:00
abstract：:Standard methods to mark Xenopus laevis individuals like tattooing or clipping toenails are inappropriate for the fast growing and regenerating small froglets and the previously used transponders are too large. In this study we successfully adapted micro transponders to tag these animals. Using these new transponders ...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-006-9061-z
更新日期：2007-08-01 00:00:00
abstract：:Camelina (Camelina sativa (L.) Crantz) is a re-emergent oilseed crop that is also becoming important as a model for applied projects based on studies in Arabidopsis thaliana, since the two species are closely related members of the tribe Camelineae of the Brassicaeae. Since camelina can be transformed genetically by f...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-013-9722-7
更新日期：2014-02-01 00:00:00
abstract：:Watermelon, an important fruit crop worldwide, is prone to attack by several viruses that often results in destructive yield loss. To develop a transgenic watermelon resistant to multiple virus infection, a single chimeric transgene comprising a silencer DNA from the partial N gene of Watermelon silver mottle virus (W...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-011-9585-8
更新日期：2012-10-01 00:00:00
abstract：:While genetically modified upland cotton (Gossypium hirsutum L.) varieties are ranked among the most successful genetically modified organisms (GMO), there is little knowledge on transgene integration in the cotton genome, partly because of the difficulty in obtaining large numbers of transgenic plants. In this study,...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-007-9101-3
更新日期：2008-04-01 00:00:00
abstract：:The silkworm Bombyx mori is a valuable insect that synthesizes bulk amounts of fibroin protein in its posterior silk gland (PSG) and weaves these proteins into silk cocoons. The mechanism by which the fibroin protein is efficiently synthesized and precisely regulated is an important aspect that has yet to be fully elu...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-019-00175-w
更新日期：2019-12-01 00:00:00
abstract：:Plant secondary metabolism is very important for traits such as flower color, flavor of food, and resistance against pests and diseases. Moreover, it is the source of many fine chemicals such as drugs, dyes, flavors, and fragrances. It is thus of interest to be able to engineer the secondary metabolite production of t...
journal_title：Transgenic research
pub_type： 杂志文章,评审
doi：10.1023/a:1008966404981
更新日期：2000-01-01 00:00:00
abstract：:The development of drought tolerant plants is a high priority because the area suffering from drought is expected to increase in the future due to global warming. One strategy for the development of drought tolerance is to genetically engineer plants with transcription factors (TFs) that regulate the expression of sev...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-013-9723-6
更新日期：2014-02-01 00:00:00
abstract：:A set of plasmids has been constructed utilizing the promoter, 5' untranslated exon, and first intron of the maize ubiquitin (Ubi-1) gene to drive expression of protein coding sequences of choice. Plasmids containing chimaeric genes for ubiquitin-luciferase (Ubi-Luc), ubiquitin-beta-glucuronidase (Ubi-GUS), and ubiqui...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/BF01969712
更新日期：1996-05-01 00:00:00
abstract：:Baculovirus p 35 protein protects cells from apoptotic cell death by inhibiting caspase activation. We have established transgenic mouse lines specifically expressing p 35 in cardiomyocytes, and primary cardiomyocytes isolated from these mice exhibit resistance to staurosporine-induced apoptosis. In a previous study, ...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-005-4350-5
更新日期：2005-10-01 00:00:00
abstract：:The Saccharomyces cerevisiae chitinase, encoded by the CTS1-2 gene has recently been confirmed by in vitro tests to possess antifungal abilities. In this study, the CTS1-2 gene has been evaluated for its in planta antifungal activity by constitutive overexpression in tobacco plants to assess its potential to increase ...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1023/a:1024220023057
更新日期：2003-08-01 00:00:00
abstract：:Cre/LoxP mediated chromosomal engineering in embryonic stem (ES) cells has a variety of applications, including the creation of model systems for studying aneuploidy. Targeted meiotic recombination (TAMERE) was proposed as a high efficiency in vivo alternative to effect Cre-mediated recombination, in which Cre recombi...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-005-0389-6
更新日期：2005-06-01 00:00:00
abstract：:Wheat provides 20 % of the calories consumed worldwide. Powdery mildew infections of wheat can result in more than 30 % yield loss but it has been demonstrated that wheat overexpressing Pm3b, an allele of the R gene Pm3, has enhanced resistance against powdery mildew under field conditions. A gene expression profile s...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-014-9821-0
更新日期：2015-02-01 00:00:00
abstract：:The random germline integration of genetically engineered transgenes has been a powerful technique to study the role of particular genes in variety of biological processes. Although the identification of the transgene insertion site is often not essential for functional analysis of the transgene, identifying the site ...
journal_title：Transgenic research
pub_type： 杂志文章
doi：10.1007/s11248-008-9190-7
更新日期：2008-10-01 00:00:00
