Title: Real‐time quantification and supplementation of bioreactor amino acids to prolong culture time and maintain antibody product quality

Abstract

Abstract Real‐time monitoring of cell cultures in bioreactors can enable expedited responses necessary to correct potential batch failure perturbations which may normally go undiscovered until the completion of the batch and result in failure. Currently, analytical technologies are dedicated to real‐time monitoring of bioreactor parameters such as pH, dissolved oxygen, and temperature, nutrients such as glucose and glutamine, or metabolites such as lactate. Despite the importance of amino acids as the building blocks of therapeutic protein products, other than glutamine their concentrations are not commonly measured. Here, we present a study into amino acid monitoring, supplementation strategies, and how these techniques may impact the cell growth profiles and product quality. We used preliminary bioreactor runs to establish baselines by determining initial amino acid consumption patterns, the results of which were used to select a pool of amino acids which gets depleted in the bioreactor. These amino acids were combined into blends which were supplemented into bioreactors during a subsequent run, the concentrations of which were monitored using a mass spectrometry based at‐line method we developed to quickly assess amino acid concentrations from crude bioreactor media. We found that these blends could prolong culture life, reversing a viable cell density decreasemore » that was leading to batch death. Additionally, we assessed how these strategies might impact protein product quality, such as the glycan profile. The amino acid consumption data were aligned with the final glycan profiles in principal component analysis to identify which amino acids are most closely associated with glycan outcomes.« less

Authors:

Powers, David N. ^[1]; Wang, Yifan ^[2]; Fratz‐Berilla, Erica J. ^[1]; Velugula‐Yellela, Sai Rashmika ^[1]; Chavez, Brittany  ^[1];

• Search DOE PAGES for author "Chavez, Brittany"
• Search DOE PAGES for ORCID "0000-0002-4233-1946"

Angart, Phillip ^[1]; Trunfio, Nicholas ^[3]; Yoon, Seongkyu  ^[4];

• Search DOE PAGES for author "Yoon, Seongkyu"
• Search DOE PAGES for ORCID "0000-0002-5330-8784"

Agarabi, Cyrus  ^[1]

• Search DOE PAGES for author "Agarabi, Cyrus"
• Search DOE PAGES for ORCID "0000-0002-3803-2943"

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+ Show Author Affiliations

1. U.S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Product Quality, Office of Biotechnology Products, Division of Biotechnology Review and Research II Silver Spring Maryland
2. U.S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Testing and Research, Division of Product Quality Research Silver Spring Maryland
3. U.S. Food and Drug Administration, Center for Drug Evaluation and Research, Office of Product Quality, Office of Biotechnology Products, Division of Biotechnology Review and Research II Silver Spring Maryland, Sartorius Stedim North America Inc Corporate Research Bohemia NY
4. Department of Chemical Engineering University of Massachusetts Lowell Massachusetts

Publication Date:

Wed Aug 28 00:00:00 EDT 2019

Sponsoring Org.:

USDOE

OSTI Identifier:

1564340

Alternate Identifier(s):

OSTI ID: 1564341

Resource Type:

Published Article

Journal Name:

Biotechnology Progress

Additional Journal Information:

Journal Name: Biotechnology Progress Journal Volume: 35 Journal Issue: 6; Journal ID: ISSN 8756-7938

Publisher:

Wiley Blackwell (John Wiley & Sons)

Country of Publication:

United States

Language:

English