Cell Line Development

Twenty Years of Innovation: Reflections on the Industry’s Past and Future

In honor of BPI’s 20th anniversary as a publication, the editors invited authors to reflect on the industry’s past, present, and future. Below, the chief operating officer of Selexis offers her perspectives along with responses to questions from the editorial team. Significant Scientific and Technological Innovations One of the most important innovations in bioprocessing has been the combination of next-generation sequencing with bioinformatics. The ability to sequence a host cell-line genome and transcriptome rapidly and cost-effectively and the development of…

How a Robust, Fully Integrated, and Highly Vetted Cell-Line Development Platform Accelerates IND Timelines

Sherry Gu, senior vice president of CMC management, WuXi Biologics. Since 2020, WuXi Biologics has supported process development and manufacturing for more than 30 biopharmaceuticals associated with COVID-19. Those include three authorized/marketed products and multiple advanced clinical candidates representing modalities such as monoclonal antibodies (MAbs) and vaccines. Gu explained how her company’s integrated platform for cell-line development (CLD) has enabled customers to advance their programs rapidly. The company’s custom protein-generation services support research and development (R&D) activities, culminating in developability…

Shortening Clinical Development Timelines Using Novel Technology for Generating Stable, High-Producing Cell Pools and Cell Lines

Greg Bleck, vice president of research and development, Catalent. Bleck described Catalent’s work in creating the GPEx Lightning cell-line development platform, which combines three key technologies to accelerate work to produce high-expressing cell lines. The platform combines a GPEx retrovector for gene insertion with a glutamine synthetase (GS) knockout cell line and a recombinase- or transposase-like system that “flips” genes into place. Catalent scientists insert the genes for dedicator-of-cytokinesis (DOCK) proteins — which are involved in intracellular signaling — at…

Advances in Cell-Line Development, Banking, and Authentication

Living cells are foundational technologies in the biopharmaceutical industry. They serve as hosts for production of therapeutic proteins, models by which to test clinical candidate efficacy and potency, tools for developing and validating bioanalytical methods, and even as medicines. To enrich our understanding of the past 20 years of bioprocessing, BPI distributed questions to supplier companies, including those that have spurred on innovation in the manufacture of critical starting materials. Below, representatives from ATCC reflect on advances in developing, banking,…

Introduction: Cell-Line Engineering and Development at BPI West

Critical to the manufacturing of biotherapeutics is development of robust and stable cell lines that express high-quality products in large quantities. Chinese hamster ovary (CHO) cells are the “workhorse” expression host for manufacturing glycoprotein-based therapeutics — from antibodies to enzymes and hormones and beyond — making them the subject of most industry discussion regarding both cell-line development (CLD) and engineering. Most methods, technologies, and strategies apply regardless of the type of protein to be expressed or the type of cells…

Genome Editing for Cell-Line Development

At BPI Europe in April 2019, Dirk Gewert (business unit leader of bioproduction at Horizon Discovery) told BioProcess Insider that Chinese hamster ovary (CHO) cell lines haven’t changed much in the 30 years since they were first used in biomanufacturing (1). Only a few companies offered commercially available, production-ready CHO cell lines for large-scale manufacturing of biotherapeutics. “In all cases,” he said, “cell lines were selected by identifying high-expressing clones and focusing on process optimization to improve expression and other…

Cell-Line Development for Expressing IgM Antibodies

Immunoglobulin G (IgG) antibodies have been studied and applied as biopharmaceuticals for decades, and they remain dominant in the monoclonal antibody (MAb) pipeline. By contrast, immunoglobulin M (IgM) molecules are much larger and consequently more challenging for biomanufacturing and therapeutic application. Essentially, they appear as clusters of the familiar Y-shaped IgG molecules, joined at their bases in pentameric (Figure 1) or hexameric forms. That structure gives them 10 and 12 binding moieties, respectively, which translate to superior binding power (avidity)…

Pseudomonas fluorescens: Cell-Line Development of a Commercially Proven Platform for Biopharmaceutical Manufacturing

A number of factors contribute to delivering a robust, highly productive, and reliable process for manufacturing a therapeutic protein. They begin with a cell-host system and a gene-expression strategy that determine a developer’s ability to optimize growth and expression titers. But for many therapeutic proteins, initial attempts to develop a production process are based on evaluation of limited factors and tend to yield only small quantities or poor product quality. Automation can enable parallel building and expression screening of diverse…

Finding the Right Partner for Outsourced Cell-Line Development

The successful commercialization of a biopharmaceutical product begins with a robust and productive cell line. Inefficient cell-line development (CLD) can lead to costly delays and roadblocks. For that reason, small, new, and virtual companies — and even established and mid-size companies — often seek the support of outsourcing partners to develop their cell lines. Outsourcing CLD activities can ease many pressures associated with manufacturing new biotherapeutics. The benefits of outsourcing CLD and associated processes include access to specialized expertise and…

Contractor Perspectives: Best Practices for Transfer, Handling, Testing, and Storage of Cell Banks

For comments about how contract development and manufacturing organizations (CDMOs) manage their cell-banking quality assurance (QA) practices. I contacted long-time member of BPI’s Editorial Advisory Board Scott M. Wheelwright, PhD, for his perspectives. Wheelwright brings many years of experience to this discussion, with insights into the evolution of technologies and practices extending back to the early launch of the biopharmaceutical industry. Currently, he provides consulting support for companies with manufacturing and sourcing in China and other Asian countries. He also…