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A new High Content Screening Paradigm: Combination of Image Analysis Software and Microplate Cytometry
Sarah Payne, Paul Wylie, Simon Carter and Wayne Bowen

Researchers are under increasing pressure to perform high content cell-based assays at throughputs compatible with primary screening. Where throughput is not an issue, microscope-based CCD imagers have predominated within the high content field, due to the breadth of biological assays that can be addressed by image analysis techniques. However, they have limited utility for screening due to their low throughput, limited field of view and generation of terabytes of image data.

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Cloe Screen MDR1-MDCK: A Predictive Model of Drug Permeability
David Turner, Boris Pufong, Susan Hinchliffe, Gayle Corkill, Deborah Slamon, Peter Dykstra, Helen Gill, Clive Dilworth and Darwin Cheney

A MDR1-MDCK permeability screen for assessing the membrane permeability properties of early drug discovery compounds has been developed. This study measured the bi-directional transport of compounds with a range of permeabilities across MDR1-MDCK monolayers. Drug concentrations were analysed by LC-MS/MS, from which apparent permeability values in apical-basolateral and basolateral-apical directions and asymmetry index were calculated.

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Study Management in Late Stage Discovery and Preclinical Research
Glyn Williams and Paul Denny-Gouldson

Organizations need to streamline their operations by managing the entire lifecycle of an experiment - from design to final publication of data. Organizations require the full benefits of IP protection, with the ability to access a solution for data capture, reduction, statistical analysis, charting and data curation. Researchers want a familiar notebook interface that they can use to create and manage study reports and publish data to corporate warehouses and document systems.

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A Software-Aided Approach to Reducing the Synthetic Burdens of Lead Structure Optimization
Sanjivanjit K. Bhal, Karim Kassam and Ed Kolovanov

Following the identification of a lead compound, the usual next step is optimization of that lead via slight structural modifications to improve or retain potency while simultaneously minimizing liabilities. Achieving this balance of required properties is a significant challenge. ACD/Structure Design Suite is a software tool that significantly helps the medicinal compounds that are expected to produce analogs with improved selected physicochemical properties.

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Gene Experssion-based Prediction and Mechanistic Assessment of Non-Genotoxic Chemical-Induced Hepatocarcinogenicity
Mark R. Fielden and Richard J. Brennan

To facilitate both prediction and mechanism-based assessment of human cancer risk, a liver gene expression signature was derived from short term experiments in the rat to predict non-genotoxic hepatocarcinogenicity. The signature was shown to classify 47 independent chemicals with 85% accuracy, much greater than other putative early biomarkers.

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Simplifying the Flow of Drug Discovery Data
Dr. Jonathan M.R. Davies

Regardless of research disciplines, scientists need to easily reach the information pertinent to their research. Ideally this data access is easy. Researchers also need the ability to ‘move the data around’ to gain a better view or different perspective. This data manipulation needs to be straightforward. Incorporating the varying views and information required by different scientific disciplines is a considerable challenge.

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Development of High-Throughput PAMPA as an In Vitro Model of Passive Transcellular Permeation
Helen Gill, Boris Pufong, Peter Dykstra, Lynn Lemmers and Darwin Cheney

The absorption of orally administered compounds is largely determined by their ability to cross the gastrointestinal tract. Cell culture models can be intensive and limited to a narrow pH range. Assays using artificial membranes, such as PAMPA (parallel artificial membrane permeation assay) can be used as an alternative approach to assess in vitro transcellular passive permeation.

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A Strategy to Investigate Potential Pro-Arrhythmic Effects of Compounds During the Drug Discovery and Development Process
Clemens Möller, Anja Nordheim, Heike Deisemann, Irene Schlobohm, Rainer Netzer, and Andreas Scheel

For pharmaceutical companies it is not only essential to identify HERG interacting compounds early during the drug discovery and development process, but also to understand potential effects of compounds on the cardiac action potential. This helps to increase the safety for patients, and to avoid the costs of unsuccessful projects in later phases.

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Development of High Throughput Assays for the Screening of Reversible and Mechanism-Based Cytochrome P450 Inhibition by Test Compounds
H. Gill, C. Dilworth, R. Southall, L. Shaw, L. Lemmers and D. Stangl

The prevalence and clinical implications, of mechanism-based CYP450 inhibition has placed greater emphasis on the early detection of compounds with this potential. We have developed and validated a high throughput reversible CYP450 inhibition assay using human liver microsomes and industry recommended probe substrates.

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Scientific News
Anti-Diabetic Drug Springs New Hope for Tuberculosis Patients
Drug for treating diabetes can double up as adjunct treatment for tuberculosis.
A Poisonous Cure
Toxic fungi may hold the secrets to tackling deadly diseases.
Antibiotic Resistance Threatens Future of Modern Medicine
Overuse and misuse of antibiotics, one of the key contributors to antimicrobial resistance (AMR).
Bacterial Toxin Targets Discovered
Understanding how bacterial toxins target human cells is set to have major implications for the development of novel drugs.
Proteomics for Systems Toxicology
MS-based proteomics is maturing into a robust technology for the measurement of proteome-wide exposure effects.
Molecular Event Mapping Opens Door to more in silico Tests
It is hoped that this new approach to mapping and predicting the impact of chemical compounds in the body could reduce the need for toxicity tests in animals.
Protein-engineered Cages Aid Studies of Cell Functions
The Cages, from researchers at Tokyo Institute of Technology, to deliver an important signalling molecule, carbon monoxide, into cells.
Wallet-Sized Labs The Next Big Thing
RMIT researchers are developing inexpensive, portable toxicology laboratories so small you could fit them in your wallet.
Altered Milk Protein Can Deliver AIDS Drug to Infants
Binding with an antiretroviral drug promises to greatly improve treatment for infants and young children suffering from HIV/AIDS.
New Drug for Common Liver Disease Improves Liver Health
An experimental drug aimed at treating a common liver disease showed promising results and potential problems in a multicenter clinical trial funded by the NIH.
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