November 21st 2024
The companies will collaborate to create and test circVec DNA–LNP formulations for use in potential therapeutic applications.
Accurately targeted immunotherapies through reliable neoantigen recognition enable personalized medicine development.
The Application of Quality by Design to Analytical Methods
October 2nd 2007To monitor and control processes or products, analytical methodology must be fit for purpose. An approach to apply quality by design principles to the design and evaluation of analytical methods has therefore been developed to meet these needs. This article features a downloadable template on which to conduct a failure mode effect analysis (FMEA).
Strategy for the Prediction and Selection of Drug Substance Salt Forms
October 2nd 2007Through consideration of the ionic equilibria of acids and bases, one may readily calculate the formation constant of a salt species solely on the basis of knowledge of the pKA value of the acid and the pKB value of the base.
Making light work of digital imaging
October 1st 2007In the biological arena, new and highly useful fluorescent markers are used to stain or 'label' specific structures of interest. They have transformed the range and applicability for optical observation. These labels are excited and correspondingly emit at specific wavelengths; thus, different facets of a specimen can be 'selected' by controlling the wavelength of the delivered and captured light. For example, labels such as 4',6-diamidino-2-phenylindole (DAPI) are used to highlight the nucleus of a cell and MitoTracker Orange is used for mitochondria. Figure 1 shows an example of a multiple stained section, viewed in fluorescence. There has been an explosion in fluorescent labels for examining biological structures, in fixed and live cell preparations.
Multimodal HPLC screening of polysaccharide-based chiral stationary phases
October 1st 2007High-performance liquid chromatography (HPLC) is a powerful tool for the enantioselective separation of chiral drugs. However, the selection of an appropriate chiral stationary phase (CSP) and suitable operating conditions is a bottleneck in method development and a time- and resource-consuming task. Multimodal screening of a small number of CSPs with broad enantiorecognition abilities has been recognized as the best strategy to achieve rapid and reliable separations of chiral compounds. This paper describes the generic screening strategy developed at Johnson & Johnson Pharmaceutical Research and Development to successfully develop enantioselective HPLC methods for chiral molecules of pharmaceutical interest.
Polysaccharide-Based Chiral Chromatography Media in HPLC and SFC
October 1st 2007Polysaccharide-based chiral stationary phases have been developed that comprise chiral selectors immobilized on their support rather than being physically coated. These materials are completely solvent stable, thereby increasing selectivity and and enabling the development of new chiral selectors that have been too unstable in a coated form for general use.
FDA Denies Entry of APIs from Chinese Supplier
September 26th 2007The US Food and Drug Administration has denied shipments of active pharmaceutical ingredients manufactured at a production facility of Kunshan Chemical and Pharmaceutical Co. for violation of good manufacturing practices, according to an FDA warning letter issued Sept. 6, 2007.
Joint Position Paper on Pharmaceutical Excipient Testing and Control Strategies
September 2nd 2007This article presents collaborative positions among excipient manufacturers, drug product manufacturers, and members of the US Pharmacopeia on key issues pertaining to the control of pharmaceutical excipients stemming from a recent Pharmaceutical Quality Research Institute workshop.