Whitepapers

To support the growing need for nitrosamine testing, SGS has expanded its volume for nitrosamine testing beyond its current service offering in Mississauga, Canada. SGS has added capacity and instrumentation to offer nitrosamine testing, including drug substance-related impurities (NDSRIs) at its West Chester, PA and Markham, Canada laboratories to allow for expanded capacity for nitrosamine testing, while staying ahead of the curve as regulations continue to evolve.

SGS has developed a network of centers of excellence for Nitrosamine testing across all regions to better serve our clients. Our experts specialize in method development solutions to identify and quantify all nitrosamine contaminants, including the challenging nitrosamine drug substance related impurities (NDSRIs).

There has been a Growing concern among regulators driving a need for awareness for manufacturers to understand the risk associated with nitrosamines in pharmaceutical and biopharmaceutical products. In this session of Changing the Conversation with SGS Live, we tackled a variety of aspects of this important issue from the risk associated with nitrosamine contamination to discovery and mitigation of nitrosamine impurities. Our experts shared the current testing requirements, along with how SGS is helping drug manufacturers along the path of development to ensure their products are free from nitrosamine contamination.

In this application note, LC separation and MS1 mass identification of a variety of oligos without the use of ion‑pairing reagents is demonstrated. The LC separation allows subsequent positive mode use with little to no flushing or hardware changes. This HILIC-based method uses an Agilent InfintyLab Poroshell 120 HILIC-Z column and MS-friendly ammonium acetate-based mobile phases. The samples were analyzed on an Agilent 1290 Infinity II LC system and a 6545XT AdvanceBio quadrupole time-of-flight mass spectrometer (LC/Q-TOF).

Characterization of oligonucleotides requires robust analytical instrumentation and methods as well as ease-of-use data analysis tools. Biocompatibility mitigates non-specific sample binding to flow path and it ensures the integrity of biomolecules and robustness of the system. In this study, two workflows, the Target Plus Impurities (TPI) and Sequence Confirmation workflows in Agilent MassHunter BioConfirm software, were carried out to characterize two oligonucleotide samples.

UV-Vis spectrophotometers have been used widely for nucleic acid quantification and quality control (QC) utilizing the fact that nucleic acids have a maximum absorbance at 260 nm (1). The concentration of nucleic acids can be easily estimated using the absorbance at 260 nm and the established absorption coefficient. Often a background correction is also performed, for example collecting a baseline using a solution containing everything but the nucleic acid or by measuring the absorbance at a wavelength that nucleic acids do not absorb. Double stranded nucleic acids are bound by hydrogen bonds between the base pairs. The temperature at which double stranded nucleic acids denature to become single stranded depends on the: – sequence and length of the nucleic acid – the pH and buffer conditions – and any mismatches in base pairs between the two strands As such, the melting temperature is very useful analytical tool and can be studied by monitoring the absorbance at 260 nm as temperature is increased or decreased. As the temperature is increased, the hydrogen bonds between the strands are broken and the double stranded nucleic acid separates into two

Creating a new therapeutic drug can take a decade or more to get to patients. Antibody production and discovery play an integral role in setting the stage for success at later stages of development. If a high affinity, functional antibody candidate is discovered early, the timeline to a finished targeted and effective therapeutic drug may be significantly reduced. In this podcast we will go through the untold tales of antibody production and discovery, as well as how Twist has optimized a process for antibody production and screening for potential therapeutics.