QbD Based Media Development for the Production of Fab Fragments in E. coli
Open accessAbstract
Ranibizumab is a biotherapeutic Fab fragment used for the treatment of age-related macular degeneration and macular oedema. It is currently expressed in the gram-negative bacterium, Escherichia coli. However, low expression levels result in a high manufacturing cost. The protein expression can be increased by manipulating nutritional requirements (carbon source, nitrogen source, buffering agent), process parameters (pH, inducer concentration, agitation, temperature), and the genetic make-up of the producing strain. Further, understanding the impact of these factors on product quality is a requirement as per the principles of Quality by Design (QbD). In this paper, we examine the effect of various media components and process parameters on the expression level and quality of the biotherapeutic. First, risk analysis was performed to shortlist different media components based on the literature. Next, experiments were performed to screen these components. Eight components were identified for further investigation and were examined for their effect and interactions using a Fractional Factorial experimental design. Sucrose, biotin, and pantothenate were found to have the maximum effect during Fab production. Furthermore, cyanocobalamin glutathione and biotin-glutathione were the most significant interactions observed. Product identification was performed with Liquid Chromatography–Mass Spectrometry (LC-MS), the expression level was quantified using Bio-layer Interferometry, Reverse Phase-HPLC, and SDS-PAGE, and product quality were measured by RP-HPLC. Overall, a five-fold enhancement of the target protein titer was obtained (from 5 mg/L to 25 mg/L) using the screened medium components vis-a-vis the basal medium, thereby demonstrating the efficacy of the systematic approach purported by QbD.
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The 22 amino acids long PelB signal sequence from Erwinia carotovora is the most frequently used for transportation of Fabs and scFvs.
“The 22 amino acids long PelB (pectate lyase B) signal sequence from Erwinia carotovora [157] is the most frequently used for transportation of the Fabs [88,96] and scFvs [30,101,158,159].”
From Evolution of Escherichia coli Expression System in Producing Antibody Recombinant Fragments (2020) · cites this paper as [96]
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- Authors
- Kumar, D., Batra, J., Komives, C., & Rathore, A. S.
- Affiliations
- Department of Chemical Engineering, Indian Institute of Technology, Hauz Khas 110016, India
- San Jose State University (US)
- Corresponding author
- Rathore, Anurag S.
- Venue
- Bioengineering
- Publisher
- MDPI AG
- Published
- 2019-03-28
- Volume
- 6
- Issue
- 2
- Pages
- 29
- ISSN
- 2306-5354 (ISSN-L)
- PMC
- PMC6631317
- OpenAlex
- W2924184670
- Cited by
- 24
- References
- 45
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 2 · 2023: 5 · 2022: 4 · 2021: 3 · 2020: 3 · 2019: 2
- FWCI
- 0.99
- Type
- journal article
- Language
- en
- Open access
- gold
- dx.doi.org
- Licence
- Locations
- Bioengineering (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Informationszentrum Lebenswissenschaften (ZB MED) (submittedVersion, cc-by)
- Funders
- Department of Biotechnology , Ministry of Science and Technology (BT/COE/34/SP15097/2015)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein purification and stability
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Viral Infectious Diseases and Gene Expression in Insects
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
- Keywords
- quality by design, fermentation medium optimization, Fab fragment, recombinant protein expression, Escherichia coli, biologic therapy, sucrose, biotin, pantothenic acid, vitamin B12, glutathione, fractional factorial design, risk analysis, protein abundance, product quality
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