Abstract:
:We introduce an easy, fast and effective method to analyze the influence of genetically modified (GM) plants on soil and model organisms in the laboratory to substitute laborious and time consuming field trials. For the studies described here we focused on two GM plants of the so-called 3rd generation: GM plants producing pharmaceuticals (PMP) and plant made industrials (PMI). Cyanophycin synthetase (cphA) was chosen as model for PMI and Choleratoxin B (CTB) as model for PMP. The model genes are expressed in transgenic roots of composite Vicia hirsuta plants grown in petri dishes for semi-sterile growth or small containers filled with non-sterile soil. No significant influence of the model gene expression on root induction, growth, biomass, interaction with symbionts such as rhizobia (number, size and functionality of nodules, selection of nodulating strains) or arbuscular mycorrhizal fungi could be detected. In vitro, but not in situ under field conditions, structural diversity of the bulk soil microbial community between transgenic and non-transgenic cultivars was determined by PLFA pattern-derived ratios of bacteria: fungi and of gram+: gram- bacteria. Significant differences in PLFA ratios were associated with dissimilarities in the quantity and molecular composition of rhizodeposits as revealed by Py-FIMS analyses. Contrary to field trials, where small effects based on the transgene expression might be hidden by the immense influence of various environmental factors, our in vitro system can detect even minor effects and correlates them to transgene expression with less space, time and labour.
journal_name
J Biotechnoljournal_title
Journal of biotechnologyauthors
Horn P,Schlichting A,Baum C,Hammesfahr U,Thiele-Bruhn S,Leinweber P,Broer Idoi
10.1016/j.jbiotec.2017.07.012subject
Has Abstractpub_date
2017-09-10 00:00:00pages
22-34eissn
0168-1656issn
1873-4863pii
S0168-1656(17)31524-9journal_volume
257pub_type
杂志文章abstract::In monitoring and controlling wastewater treatment processes, on-line information of nutrient dynamics is very important. However, these variables are determined with a significant time delay. Although the final effluent quality can be analyzed after this delay, it is often too late to make proper adjustments. In this...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/s0168-1656(99)00171-6
更新日期:1999-10-08 00:00:00
abstract::Protein modifications by intricate cellular machineries often redesign the structure and function of existing proteins to impact biological networks. Disulfide bond formation between cysteine (Cys) pairs is one of the most common modifications found in extracellularly-destined proteins, key to maintaining protein stru...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2017.03.006
更新日期:2017-04-20 00:00:00
abstract::Multiple phage-peptide constructs, where the peptides mimic sperm epitopes that bind to zona pellucida (ZP) proteins, were generated via selection from a phage display library using a novel approach. Selections were designed to allow for identification of ZP-binding phage clones with potential species-specific propert...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2012.10.006
更新日期:2012-12-31 00:00:00
abstract::This study aimed to produce a cellulase blend and to evaluate its application in a simultaneous saccharification and fermentation (SSF) process for second generation ethanol production from sugar cane bagasse. The sugar cane bagasse was subjected to pretreatments (diluted acid and alkaline), as for disorganizing the l...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2012.10.014
更新日期:2013-01-10 00:00:00
abstract::The hematopoietic system represents an interesting model for gene transfer protocols. Here, we have evaluated the efficiency of a gene transfer system using the polycationic compound SuperFect (Qiagen) and the K562 hematopoietic cell line. Transient and stable vectors carrying the enhanced green fluorescent protein (E...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/s0168-1656(01)00276-0
更新日期:2001-06-15 00:00:00
abstract::A microorganism with the ability to form L-tryptophan from D,L-5-(3-indolyl-methyl)hydantoin (D,L-5-IMH) was isolated and identified as Arthrobacter sp. (DSM 3747). After isolation of a mutant with high tryptophan production activity but low tryptophan degradation, cultural conditions were optimized to achieve high am...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/0168-1656(90)90118-u
更新日期:1990-06-01 00:00:00
abstract::European eel (Anguilla anguilla) elvers were intraperitoneally injected with different doses of 3,3',4,4'-tetrachlorobiyphenyl (PCB77) to examine and characterize the inductive effect of coplanar PCBs on CYP1A1 gene expression in liver and gills by using a semi-quantitative RT-PCR analysis. The influence of PCB77 inje...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2008.06.008
更新日期:2008-09-10 00:00:00
abstract::An assay was developed to measure the hydrophobic interactions of commonly used mammalian cell lines grown in culture. The assay depends on the loss of cells from an aqueous suspension following vortexing with a hydrophobic oil phase. This allowed the determination of a hydrophobicity index, which was significantly hi...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/s0168-1656(01)00440-0
更新日期:2002-04-25 00:00:00
abstract::Hepatocyte growth factor (HGF) is biosynthesized as a biologically inactive, single-chain form (pro-HGF). Its activation is associated with cleavage at Arg494-Val495 into a two-chain mature form composed of disulfide-linked alpha- and beta-chains. Because serum is a major source of HGF activator (the predominant serin...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2007.11.006
更新日期:2008-02-29 00:00:00
abstract::The addition of 5-40 mM L-glutamine to batch cultures of a murine hybridoma following the cessation of rapid growth significantly stimulated monoclonal antibody (mAb) synthesis and secretion per cell. Stimulation of mAb secretion following the cessation of rapid growth was also observed in response to addition of mito...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/0168-1656(92)90142-v
更新日期:1992-02-01 00:00:00
abstract::Threonine aldolase (TA) catalyzes a reversible reaction, in which threonine is decomposed into glycine and acetaldehyde. The same enzyme can be used to catalyze aldol reaction between glycine and a variety of aromatic and aliphatic aldehydes, thus creating various alpha-amino-alcohols. Therefore, TA is a very promisin...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2015.02.013
更新日期:2015-04-10 00:00:00
abstract::The growth of bacteria as structured aggregates termed biofilms leads to their protection from harsh environmental conditions such as physical and chemical stresses, shearing forces, and limited nutrient availability. Because of this highly adapted ability to survive adverse environmental conditions, bacterial biofilm...
journal_title:Journal of biotechnology
pub_type: 杂志文章,评审
doi:10.1016/j.jbiotec.2014.09.003
更新日期:2014-12-10 00:00:00
abstract::This paper discusses the concept of generic model-based software sensors with particular reference to bioprocess application. The industrial need for software sensing is considered and two industrial bioprocess systems are used in order to highlight the operability problems which warrant their development. Alternative...
journal_title:Journal of biotechnology
pub_type: 杂志文章,评审
doi:10.1016/0168-1656(92)90114-o
更新日期:1992-08-01 00:00:00
abstract::In this article, we review how molecular modeling techniques can be used to shed light on how water and organic solvents influence the reactivity of enzymes. The application of thermodynamics-based models allowed the first qualitative predictions on the selectivity of many reaction types. However, it was with the appl...
journal_title:Journal of biotechnology
pub_type: 杂志文章,评审
doi:10.1016/s0168-1656(02)00034-2
更新日期:2002-06-13 00:00:00
abstract::Whole metagenome shotgun sequencing provides information about the gene content and the composition of microbial communities provided that the processing of the samples does not introduce a methodology-driven bias. We tested the impact of DNA isolation and storage period on the metagenome profile. Deep throat swabs we...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2017.01.001
更新日期:2017-05-20 00:00:00
abstract::Verapamil has been shown to inhibit glucose transport in several cell types. However, the consequences of this inhibition on central metabolism are not well known. In this study we focused on verapamil induced changes in metabolic fluxes in a murine atrial cell line (HL-1 cells). These cells were adapted to serum free...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2011.07.028
更新日期:2011-09-20 00:00:00
abstract::Physiologically relevant in vitro models can serve as biological analytical platforms for testing novel treatments and drug delivery systems. We describe the first steps in the development of a 3D human brain tumour co-culture model that includes the interplay between normal and tumour tissue along with nutrient gradi...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2015.01.002
更新日期:2015-07-10 00:00:00
abstract::A novel method for immobilizing large DNA fragments on a solid surface was developed. A mixed self-assembled monolayer of thiolated single-stranded DNA with inert alkanethiol was generated on a gold (Au) surface through the Au-S reaction. Surface-tethered DNA generated by this method was compatible with various geneti...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/s0168-1656(02)00051-2
更新日期:2002-07-03 00:00:00
abstract::Water shortage necessitated South Indian sago factory owners, extracting starch out of cassava tubers, to install biogas plants where a starch utilizing microbial community multiplies and reduces the biological oxygen demand (BOD) of the waste waters by presently about 30%. The purification efficiency of sago factory ...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2012.11.013
更新日期:2012-12-15 00:00:00
abstract::The circadian clock schedules processes in microalgae cells at suitable times in the day/night cycle. To gain knowledge about these biological time schedules, Neochloris oleoabundans was grown under constant light conditions and nitrogen limitation. Under these constant conditions, the only variable was the circadian ...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2014.07.016
更新日期:2014-10-10 00:00:00
abstract::Streptomyces sp. strain CFMR 7, which naturally degrades rubber, was isolated from a rubber plantation. Whole genome sequencing and assembly resulted in 2 contigs with total genome size of 8.248 Mb. Two latex clearing protein (lcp) genes which are responsible for rubber degrading activities were identified. ...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2015.09.007
更新日期:2015-11-20 00:00:00
abstract::Ubiquitination is one of the most significant posttranslational modifications (PTMs). To evaluate the ability of an insect cell-free protein synthesis system to carry out ubiquitin (Ub) conjugation to in vitro translated proteins, poly-Ub chain formation was studied in an insect cell-free protein synthesis system. Pol...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2009.10.009
更新日期:2010-01-01 00:00:00
abstract::2'-Fucosyllactose (2-FL) is one of most abundant functional oligosaccharides in human milk, which is involved in many biological functions for human health. To date, most microbial systems for 2-FL production have been limited to use Escherichia coli JM strains since they cannot metabolize lactose. In this study, E. c...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2015.06.431
更新日期:2015-09-20 00:00:00
abstract::The rare earth elements Nd, La, Ce at proper concentrations had positive effects on the cell growth of Cistanche deserticola and production of phenylethanoid glycosides (PeG). A mixture of rare earth elements (MRE, La(2)O(3):CeO(2):Pr(6)O(11):Sm(2)O(3)=255:175:3:1, mol/mol) showed the most remarkable effects. After 30...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/s0168-1656(03)00019-1
更新日期:2003-04-24 00:00:00
abstract::The invariant surface glycoprotein ISG75 is a transmembrane glycoprotein occurring on the surface of the bloodstream-form Trypanozoon. This study describes the expression and purification of the N-terminal extracellular domain of ISG75, a novel target for development of diagnostic tests for trypanosomosis. To facilita...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2008.04.012
更新日期:2008-06-30 00:00:00
abstract::Starvation is one of the most common forms of stress experienced in the wild life. Such conditions associate the other forms of stress such as acid, heat, oxidation, and so on. Organisms acclimate to such stresses and acquire the stress tolerances, which often trade-off their growth rates. To investigate whether starv...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2018.04.007
更新日期:2018-06-10 00:00:00
abstract::Monitoring cell growth is crucial to the success of an animal cell culture process that can be accomplished by a variety of direct or indirect methodologies. Glucose is a major carbon and energy source for cultured mammalian cells in most cases, but glycolytic metabolism often results in the accumulation of lactate. G...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2005.05.016
更新日期:2005-08-22 00:00:00
abstract::The effect of an additional carbon source, lactate, on Penicillium camembertii growth on glutamate as both carbon and nitrogen sources was examined. Glutamate (and lactate) was present in excess in both media. Throughout the whole culture, similar growth time-courses were recorded on both media, indicating the absence...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2004.07.007
更新日期:2004-11-09 00:00:00
abstract::We previously developed a novel one-step biotransformation process for the production of α-ketoglutarate (α-KG) from L-glutamic acid by a Bacillus subtilis whole-cell biocatalyst expressing an L-amino acid deaminase (pm1) of Proteus mirabilis. However, the biotransformation efficiency of this process was low owing to ...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2014.07.431
更新日期:2014-10-10 00:00:00
abstract::There has been little research reported on the synergism of plant expansins in cellulose hydrolysis because of the difficulty of heterologous expression. In this study, the expansin gene LeExp2 of Lycopersicum esculentum was expressed for the first time in Pichia pastoris to identify its function in vitro. The optimal...
journal_title:Journal of biotechnology
pub_type: 杂志文章
doi:10.1016/j.jbiotec.2014.07.013
更新日期:2014-09-30 00:00:00