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Issue 4 2009

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RNAi applications in biology and medicine

30 July 2009 | By

The field of oligonucleotide-based therapy experienced a revival with the discovery of RNA interference (RNAi) in 19981. RNAi is a conserved endogenous mechanism, which is triggered by double-stranded (ds) RNAs leading to target-specific inhibition of gene expression by promoting mRNA degradation or translational repression. There are two RNAi pathways that…

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Article 4: Optimisation of the PCR step of a qPCR assay

30 July 2009 | By

The deceptive simplicity of a typical qPCR assay is an important reason for the exponential growth in the adoption of qPCR-related technologies for both research and diagnostic applications. The only requirements for obtaining ostensibly quantitative data are a mixing of primers, DNA and a mastermix, their distribution into individual tubes…

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Cellular Imaging & Analysis Business Unit

30 July 2009 | By

Mark Collins from Thermo Fisher Scientific, who provide analytical instruments, laboratory equipment, software, services, consumables and reagents, talks to us about current developments and future changes.

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Drug-drug interactions: tools for drug transporter protein studies

30 July 2009 | By

Drug transporters are membrane proteins involved in the uptake or efflux of drugs by several tissues such as the intestine, liver, kidney and brain. They can have a significant impact on the pharmacokinetics of endogenous and exogenous compounds. Also, co-administered drugs or nutrients can influence the transporter activity which may…

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QbD and PAT: From Science to Compliance

30 July 2009 | By Pedro E. Hernandez-Abad, Associate Director; Jun Huang, Principal PAT Scientist II and Saly Romero-Torres, Principal PAT Scientist, both Wyeth Pharmaceuticals

Boards of health like the Food and Drug Administration and European Medicines Agency and ICH guidelines Q8, Q9 and Q10, provide a framework for Quality by Design (QbD) that fully integrates drug substance and drug product development with the principles of Quality Risk Management (QRM), Process Analytical Technology (PAT) and…