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Tuesday, September 23, 2014
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Resorufin - a lead for a new protein kinase CK2 inhibitor
Iben Skjøth Sandholt1, Birgitte Brinkmann Olsen1, Barbara Guerra1, Olaf-Georg Issinger1, Brigitte Boldyreff2

Screening of a natural compound library led to the identification of resorufin, as a highly selective and potent inhibitor for protein kinase CK2. Out of 52 kinases tested only CK2 was inhibited. The IC50 values determined for the CK2 holoenzymes were 1.5 µM and for the free catalytic subunits ca. 4 µM. In different cancer cell lines treatment with resorufin led to cell death and endogenous CK2 was inhibited.

MED-SuMo and MED-Hybridise: exploit all PDB macromolecule structures to design/optimize innovative leads
Moriaud F., Oguievetskaia K., Adcock S.A., Vorotynsev A.M., Martin L., Doppelt-Azeroual O. and Delfaud F.

Obtaining structural information on fragment-protein target is a key factor and also a major limitation. We’ve used MED-SuMo and MED-Hybridise to query and mine the PDB seeking for similar interaction surfaces. MED-portions were used to design novel scaffolds (GPCR) and decorate a given scaffold (kinase). We have analysed the scaffolds in regard to their diversity, their presence in PubChem, PDB and other libraries.

Production of prostanoids in the plant Arabidopsis thaliana
Maged E. Mohamed and Colin M. Lazarus.

Prostanoids originate from PGHS action on the 20-carbon polyunsaturated fatty acid: DGLA, AA and EPA. We used cDNA expression in Saccharomyces cerevisiae and enzyme immunoassays to compare the activities of two mouse PGHS isoforms and cDNAs encoding mouse prostaglandin I synthase and thromboxane A synthase and genomic DNA encoding Trypanosoma brucei prostaglandin F synthase. All genes were active and were put in Transgenic Arabidopsis thaliana plants producing DGLA.

Biosynthesis of Very Long Chain Polyunsaturated Fatty Acids in Chicory
Hattem Mekky1, Michael R. Davey1, J. Brian Power1 , Maged E. Mohamed2 and Colin M. Lazarus2

Very long chain polyunsaturated fatty acids (VLCPUFAs) are declining in reserves, since they are produced by oily fish. VLCPUFAs are important in human nutrition because they are responsible for the production of inflammatory mediators such as prostaglandins, the regulation of cholesterol synthesis and its transport, and the maintenance of cellular membranes. This research aims to produce VLCPUFAs in edible plants.

qPCRas a primary screen in drug discovery
GauravJaggi, Frank Boeckler, Andreas Joerger and Alan Fersht

We report the use of qPCR technique to follow the thermal unfolding of proteins by the binding of the dye SYPRO Orange, and exploit its potential as a robust and high-throughput primary screen for small molecule drug discovery.

Heterochromatin structure is induced by siRNA targeting HIV-1 promoter region
K Suzuki1, H Lim1,3, T Ishida2, T Watanabe2, D Cooper1,3, A Kelleher1,3

We transfected siRNA targeting HIV-1 promoter region into a cell line productively infected with HIV-1. ChIP analysis revealed that the RNA duplex induced transcriptional gene silencing and enrichment of Ago1, H3K9me2, and HDAC1 in HIV promoter region to form heterochromatin structure. The data indicates RNA duplex induces the latent phase of HIV infection, since the chromosome formation is very similar to the state of HIV latently infected cell lines

Evolution of the Contact Phase of Vertebrate Blood Coagulation
M. B. Ponczek, D. Gailani and R. F. Doolittle

Three proteases involved in the contact phase of vertebrate blood coagulation were searched in genomes of amphibians, birds and mammals. Several data sources were used during this bioinformatics analysis. Our survey confirmed that the vertebrate contact phase has occurred by way of a series of gene duplications during the course of several hundred million years of evolution, beginning with the appearance of fXII and a PK-fXI predecessor in amphibians.

Drop distribution determination in a liquid-liquid dispersion by image processing
Brás, L.M.R., Gomes E.F., Ribeiro M. M. M., Guimarães M. M. L.

Image processing is a very relevant area of computer science with applications in many domains. Quantitative analysis and interpretation of digitized images is currently an important tool in several scientific domains. The aim of the present work is the development of shape discrimination and size classification algorithms for liquid drops in monochromatic digitized frames.

Analysis of in silico stereoelectronic properties of PMD (p-menthane-3-8-diols) and its derivatives to develop a pharmacophore for insect repellent activity
Bhattacharjee AK, Chauhan K, Bathini N, Greico J, Achee N, Lawrence K, Benante JP and Gupta RK

PMD, an insect repellent that can be derived from steam distillate residue of leaves of lemon eucalyptus. No QSAR studies are known in literature. We performed ab initio (RHF/6-31G**) study of PMD derivatives. A 3D pharmacophore for repellent activity was also developed. Results indicate lipophilicity, MEP separation and localized negative MEP by oxygen atom have roles for repellency. The pharmacophore is consistent and allowed design of more effective insect repellents.

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Showing Results 61 - 70 of 148
Scientific News
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.
Drug Does Not Improve Set of Cardiovascular Outcomes for Diastolic Heart Failure
NIH-supported study finds drug does appear to reduce hospitalizations for diastolic heart failure.
Entirely Novel Strategy to Molecular Anticancer Therapy Tricks Malignant Cells
New drug prevents tumour growth by inhibiting the nucleotide sanitizing enzyme MTH1.
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