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Tuesday, September 30, 2014
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In silico Screening for Signalosome Inhibitors
Melanie Füllbeck, Wolfgang Dubiel, Cornelius Frömmel, Andrean Goede and Robert Preissner

The COP9 signalosome (CSN) is involved in cell cycle regulation, possesses kinase activity and is therefore an interesting therapeutic target for anti-tumor drugs. Known inhibitors of the kinase activity exhibit low binding constants. Using them a 3D similarity screening for our in-house database is performed. The superposition algorithm enables the explicit consideration of conformers reflecting the structural flexibility.

Design and Synthesis of Novel Thiazolidine and Pyrrolidine Derivatives as DPP-IV Inhibitors
Ramesh C. Gupta, Laxmikant Chhipa, A. B. Mandhare, Sunil S. Nadkarni, Deepa Joshi, Shital Zambad, Padmaja Pathak, Vijay C. Chauthaiwale and C. Dutt

DPP-IV inhibitors have many advantages like increasing insulin release and suppressing glucagon release in a glucose-dependent manner hence they pose less of a hypoglycemia risk and no weight gain than that observed with other antihyperglycemic agents. To develop a novel potent DPP-IV inhibitors we have synthesized and evaluated DPP-IV inhibiting activity and selectivity of various compounds. All these results would facilitate further development of Novel drugs for treatment of type 2 diabetes.

Pharmacophore Mapping of Flavone Derivatives for Aromatase Inhibiton
Shuchi Nagar, Md Ataul Islam, Arup Mukherjee and Achintya Saha

The study explores the structural requirements of flavones for inhibition of aromatase activity. The QSAR analysis generates the model that shows the importance of flavone ring and with molecular lipophilicity. Presence of additional aromatic ring and m-hydroxy substitution on that ring increases inhibitory activity. Space modeling study further adjudged the presence of hydrogen bond acceptor, hydrophobic and aromatic ring and critical distance among features for the inhibitory activity.

Solid Phase Synthesis of a Fluorescent Peptide: Comparison of Fmoc-Lys(5-FAM)-Resin and Fmoc-Lys[5-FAM(Trt)-Resin
Wenyu Fu, Ling Sheng, Anita Hong and Xiaohe Tong

We have prepared and performed comparison studies using two kinds of resins, Fmoc-Lys(5-FAM)-Rink Amide resin (I) and Fmoc-Lys[5-FAM(trt)]-Rink Amide resin (II), the latter contains a phenolic hydroxyl group protected with a trityl group. Syntheses were carried out under the same standard conditions and the peptides obtained showed no significant difference in purity. The results of these studies showed that resin (I) is adequate for synthesis of C-terminal fluorescent labeled peptide.

EasyBeacons™ - new Probes Ideal for Realtime PCR Detection of Methylation Status of Single CpG Duplets and SNPs
K. Skadhauge, C. Nielsen & U.B. Christensen

The EasyBeacons™ presented here are based on the novel technology Intercalating Nucleic Acid, INA®, linked to a fluorophore and a quencher. INA® is composed of normal DNA nucleotides and Intercalating Pseudo Nucleotides (IPNs). The fact that the EasyBeacons™ are mostly composed of normal DNA nucleotides means that in many respects EasyBeacons™ behave like DNA based probes, allowing use of standard buffers, primers and enzymes and hence reduces the optimisation efforts.

Novel Fluidics Microbead Trap/Flow Cell Enhances Speed/Sensitivity of Bead-Based Bioassays Up to 5-Fold
RM Ozanich, CJ Bruckner-Lea, JW Grate, MG Warner, BP Dockendorff, KC Antolick, HC Edberg, LH Johnson, AN Easterday

Pacific Northwest National Laboratory (PNNL) has developed a micro/nano particle trap that allows surface-functionalized magnetic or non-magnetic particles to be trapped with subsequent perfusion of sample, reagents and wash solutions, yielding significant (up to 5-fold) improvements in assay speed and sensitivity, while significantly reducing sample matrix effects.

Indirubin inhibitors of Leishmania mexicana CRK3 Cyclin Dependent Kinase
Dawn Taylor, Karen M. Grant and Nicholas J. Westwooda

The indirubins are known inhibitors of cyclin dependent kinases (CDKs), including CRK3 from the protozoan parasite Leishmania mexicana, which is essential for proliferation of the disease Leishmaniasis. Subsequent investigations into the pharmacological properties of the indirubins show them to be competitive ATPbinding site inhibitors of the CDKs.

Analytical Sample Transport – A Pneumatic Solution
Matthew Cook, Bob Lawson and Paul Martin

Pneumatic air transport systems can provide a safe, efficient and rapid means of sending samples within different departments of a research laboratory. These systems are often used within a hospital, supermarket or bank and represent an effective method for sending samples or packages to different departments. TTP LabTech has used this technology for over 6 years, predominately in our comPILER and comPOUND systems.

Intelligent K-Means Clustering in a Multiple Endpoint Environment
E. Kolossov

The main success of QSAR predictive technology is mainly related to the modelling of the single activity/property endpoint in chemical space. Unfortunately an optimisation of the targeted endpoint may result in losing other desired properties, for example, toxicity is increased or solubility reduced. Because of this, attempts have been made in the last few years to model chemical space against multiple endpoints.

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Showing Results 91 - 100 of 148
Scientific News
Chemists Recruit Anthrax to Deliver Cancer Drugs
With some tinkering, a deadly protein becomes an efficient carrier for antibody drugs.
Protein ‘Map’ Could Lead to Potent New Cancer Drugs
Findings will help scientists to design drugs that could target NMT enzyme.
Animal Testing can Mislead Drug Discovery and Development
Several blockbuster drugs would not be on the market, if scientists had relied solely on drug-uptake in animal trials, according to new research.
Synthesis and Bioactivity of Analogues of Tropodithietic Acid
The study suggests that the sulfur atoms in the marine antibiotic TDA are not essential for bioactivity, but different modes of action for TDA and its sulfur-free analogue cannot be excluded.
Cancer-Fighting Drugs Might Also Stop Malaria Early
A number of compounds have been identified which could be used to fight malaria.
Collaboration Leads to Possible Shortcut to New Drugs
The reaction, reported in Science, demonstrates how a carboxylic acid can be transformed into a very reactive site through use of a novel photoredox catalyst.
Catalysts That Mimic Enzymes Could Revolutionize Pharmaceutical Manufacturing
Structures made of polymer chains allow the catalysts to work in water.
Discovery of How Taxol Works Could Lead to Better Anticancer Drugs
The drug’s interference with the normal function of microtubules could help in designing better anticancer drugs.
Chemists Discover Cancer Drug Candidate Structure
Chemists at The Scripps Research Institute have determined the correct structure of a highly promising anticancer compound approved by the U.S. FDA for clinical trials in cancer patients.
Novel Drug Targets for Allergy Identified
Researchers have identified several target molecules which are suitable for the development of new allergy drugs.
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