Biopharmaceuticals and Protein Analysis

Small metabolic molecules often are chiral and can play important roles in regulating a variety of biological functions, occasionally providing information about the presence and progression of disease.

Headspace GC reveals that sonication can degrade common organic solvents.

The effect of the mobile phase composition, organic alcohols, ion-pair reagents, and different bonding chemistries on mAb separations is discussed.

An analytical method for the separation of oligonucleotides of different chain length by IEC using a bio-inert UHPLC system is presented.

An overview of mRNA-based vaccine production and a discussion on the methods that are currently in use to check the quality of these vaccines.

Recent assessments of four biosimilars illustrate how a combination of orthogonal, high-resolution tools is used to demonstrate analytical and functional biosimilarity.

Advances in sample preparation have enabled analysis of RNA modifications in single cells, paving the way to discovering new insights into the functions of these molecules.

The benefits of tandem LC–MS are revealed.

The Column interviewed Valentina D’Atri about her work to couple CEC to MS, and the challenges of analyzing complex biopharmaceuticals.

The articles presented here highlight important recent developments in biopharmaceutical analysis.

Multi-isocratic elution mode is a powerful chromatographic approach for characterizing minor isoforms of monoclonal antibodies.

Flow-through immobilized-enzyme reactors (IMERs) can streamline protein digestion for bottom- and middle-up LC–MS characterization while providing high accuracy and reproducibility.

Commercially available trypsin IMERs can digest proteins with high sequence coverage and robustness, facilitating online multidimensional LC–MS.

Leading biopharmaceutical companies are integrating HPLC into production processes for monitoring critical quality attributes (CQAs) with high-resolution mass spectrometry (HRMS) detection.

This work compares at-line Protein A-MS with a standard multi-attribute method (MAM) workflow for analyzing product quality attributes (PQAs) during upstream processing.

High-resolution mass spectrometry (HRMS) is an increasingly critical tool for identifying, characterizing, and monitoring attributes of protein-based therapeutics.

If we are going to achieve widespread adoption of multidimensional separations, we need more systematic approaches to method development that rely less on user experience.

Charge detection mass spectrometry (CDMS) is a useful tool to characterize larger, more complex biopharmaceuticals like bispecific antibodies and ADCs.

Barry L. Karger and James P. Grinias are the winners of the 15th annual LCGC Lifetime Achievement and Emerging Leader in Chromatography Awards, respectively, for 2022. Here, we review their achievements.

We review different approaches and coupling strategies for analyzing monoclonal antibody aggregates with 2D-LC.

Intact mass analysis is becoming increasingly useful for characterizing biologics. We describe the current application of intact mass analysis, including quantitation, sequencing, and structural characterization.

Recent developments in high-resolution mass spectrometry (HRMS) are aiding biopharmaceutical development and simplifying routine monitoring, with applications in areas like multi-attribute methods, coupling established purity methods with MS, and subunit analysis.

A validated FFF-MALS method aligned with technical specification ISO/TS 21362 for the analysis of lipid-based nanoparticles (LNPs) encapsulating siRNA and mRNA is presented.

There is a need to use more descriptive and precise terms to describe some of the properties of the products used for biopharmaceutical analysis. It is probably more correct to say “low adsorption” and “corrosion-resistant” systems.

We present the main analytical techniques for performing functional characterization of biotherapeutic products. Such assessments are particularly critical for biosimilars, where analytical testing must ensure functional comparability with the innovator product.

We explore the impact of two different stationary phases and ion-pair reagents on the retention behavior of a therapeutic peptide using reversed-phase liquid chromatography. This information is of fundamental importance for the development of reliable, selective, and fast analytical methods able to separate and identify the target peptide.

The benefits of a robustness assessment for the analysis of a NIST mAb using a wide pore C4 LC column are described.

In the second part of this review of the current state of HIC, some practical considerations are explained, including method development, selection of the phase system, combined salt systems, and possibilities to combine HIC with other chromatographic modes.

A review of the current state of HIC, focusing on retention and separation mechanisms with the aim of developing more robust methods. Can HIC be considered as a non-denaturing and non-destructive technique with advantages for protein analysis?