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Adame M, Vázquez H, Juárez-López D, Corzo G, Amezcua M, López D, González Z, Schcolnik-Cabrera A, Morales-Martínez A, Villegas E. Expression and characterization of scFv-6009FV in Pichia pastoris with improved ability to neutralize the neurotoxin Cn2 from Centruroides noxius. Int J Biol Macromol 2024; 275:133461. [PMID: 38945343 DOI: 10.1016/j.ijbiomac.2024.133461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/11/2024] [Accepted: 06/25/2024] [Indexed: 07/02/2024]
Abstract
Small single-chain variable fragments (scFv) are promising biomolecules to inhibit and neutralize toxins and to act as antivenoms. In this work, we aimed to produce a functional scFv-6009FV in the yeast Pichia pastoris, which inhibits the pure Cn2 neurotoxin and the whole venom of Centruroides noxius. We were able to achieve yields of up to 31.6 ± 2 mg/L in flasks. Furthermore, the protein showed a structure of 6.1 % α-helix, 49.1 % β-sheet, and 44.8 % of random coil by CD. Mass spectrometry confirmed the amino acid sequence and showed no glycosylation profile for this molecule. Purified scFv-6009FV allowed us to develop anti-scFvs in rabbits, which were then used in affinity columns to purify other scFvs. Determination of its half-maximal inhibitory concentration value (IC50) was 40 % better than the scFvs produced by E. coli as a control. Finally, we found that scFv-6009FV was able to inhibit ex vivo the pure Cn2 toxin and the whole venom from C. noxius in murine rescue experiments. These results demonstrated that under the conditions assayed here, P. pastoris is suited to produce scFv-6009FV that, compared to scFvs produced by E. coli, maintains the characteristics of an antibody and neutralizes the Cn2 toxin more effectively.
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Affiliation(s)
- Mariel Adame
- Departamento de Productos Naturales, Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | - Hilda Vázquez
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México
| | - Daniel Juárez-López
- Instituto de Investigaciones Biomédicas, Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Coyoacán, Ciudad de México, México
| | - Gerardo Corzo
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México
| | - Mónica Amezcua
- Departamento de Productos Naturales, Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | - Daniela López
- Departamento de Productos Naturales, Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | - Zuriel González
- Departamento de Productos Naturales, Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | | | - Adriana Morales-Martínez
- Departamento de Productos Naturales, Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México
| | - Elba Villegas
- Departamento de Productos Naturales, Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, México.
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Li Y, Song J, Jiang S, Yang Y, Han Y, Zhong L, Zhou J, Wang M, Song H, Xu Y. Canine distemper virus (CDV)-neutralizing activities of an anti-CDV canine-derived single-chain variable antibody fragment 4-15 (scFv 4-15) screened by phage display technology. Int J Biol Macromol 2024; 257:128645. [PMID: 38061526 DOI: 10.1016/j.ijbiomac.2023.128645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 11/26/2023] [Accepted: 12/04/2023] [Indexed: 12/18/2023]
Abstract
Canine distemper virus (CDV) is a highly contagious pathogen that causes severe diarrhea, fever and vomiting in domestic dogs, posing a serious threat to the dog breeding industry. Currently, there are no effective therapeutic agents for emergency treatment despite the availability of vaccines against CDV infection. Single-chain fragment variable (scFv) antibody has been demonstrated to effectively inhibit virus infections, suggesting a potential candidate as a therapeutic agent for canine distemper. In this study, a phage-displayed scFv library was constructed from the peripheral blood lymphocytes of dog immunized intramuscularly with live-attenuated CDV vaccine, and was subjected to four rounds of pannings against CDV. Subsequent indirect enzyme-linked immunosorbent assay screening revealed high-affinity scFv antibodies specific to CDV, and indirect immunofluorescence assay screening revealed CDV-neutralizing activity of scFv antibodies. Our results showed that a scFv antibody 4-15 (scFv 4-15) with high-affinity binding to CDV and neutralizing activity against CDV was obtained, which displayed effective therapeutic potential in vivo for dogs challenged with a lethal dose of CDV. Conclusively, the scFv 4-15 with high-affinity binding and neutralizing activity to CDV that was obtained by phage display technology provides a promising candidate for the therapeutic agents against CDV infection.
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Affiliation(s)
- Yuan Li
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, People's Republic of China; Zhejiang Huijia Biotechnology Co., Ltd., Huzhou, People's Republic of China
| | - Jingge Song
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, People's Republic of China
| | - Sheng Jiang
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, People's Republic of China
| | - Yaqi Yang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China; Republic of China Longkou Animal Disease Prevention and Control Center, Longkou, People's Republic of China
| | - Yanyan Han
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, People's Republic of China
| | - Linhan Zhong
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, People's Republic of China
| | - Jiaying Zhou
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, People's Republic of China
| | - Mei Wang
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, People's Republic of China
| | - Houhui Song
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, People's Republic of China; Zhejiang Provincial Engineering Research Center for Animal Health Diagnostics & Advanced Technology, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, People's Republic of China.
| | - Yigang Xu
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, People's Republic of China; Zhejiang Provincial Engineering Research Center for Animal Health Diagnostics & Advanced Technology, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, People's Republic of China.
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Gómez-Ramírez IV, Corrales-García LL, Possani LD, Riaño-Umbarila L, Becerril B. Expression in Pichia pastoris of human antibody fragments that neutralize venoms of Mexican scorpions. Toxicon 2023; 223:107012. [PMID: 36592762 DOI: 10.1016/j.toxicon.2022.107012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/16/2022] [Accepted: 12/27/2022] [Indexed: 12/31/2022]
Abstract
The methylotrophic yeast Pichia pastoris has been one of the most widely used organisms in recent years as an expression system for a wide variety of recombinant proteins with therapeutic potential. Its popularity as an alternative system to Escherichia coli is mainly due to the easy genetic manipulation and the ability to produce high levels of heterologous proteins, either intracellularly or extracellularly. Being a eukaryotic organism, P. pastoris carries out post-translational modifications that allow it to produce soluble and correctly folded recombinant proteins. This work, evaluated the expression capacity in P. pastoris of two single-chain variable fragments (scFvs) of human origin, 10FG2 and LR. These scFvs were previously obtained by directed evolution against scorpion venom toxins and are able to neutralize different toxins and venoms of Mexican species. The yield obtained in P. pastoris was higher than that obtained in bacterial periplasm (E. coli), and most importantly, biochemical and functional properties were not modified. These results confirm that P. pastoris yeast can be a good expression system for the production of antibody fragments of a new recombinant antivenom.
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Affiliation(s)
- Ilse V Gómez-Ramírez
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, UNAM, Apartado Postal 510-3, Cuernavaca, Morelos, 62250, Mexico
| | - Ligia Luz Corrales-García
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, UNAM, Apartado Postal 510-3, Cuernavaca, Morelos, 62250, Mexico; Departamento de Alimentos, Facultad de Ciencias Farmacéuticas y Alimentarias, Universidad de Antioquia, AA 1226, Medellín, 050010, Colombia
| | - Lourival D Possani
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, UNAM, Apartado Postal 510-3, Cuernavaca, Morelos, 62250, Mexico
| | - Lidia Riaño-Umbarila
- Investigadora por México, CONACyT, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apartado Postal 510-3, Cuernavaca, Morelos, 62250, Mexico.
| | - Baltazar Becerril
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, UNAM, Apartado Postal 510-3, Cuernavaca, Morelos, 62250, Mexico.
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Catalytic Antibodies: Design, Expression, and Their Applications in Medicine. Appl Biochem Biotechnol 2023; 195:1514-1540. [PMID: 36222989 PMCID: PMC9554387 DOI: 10.1007/s12010-022-04183-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2022] [Indexed: 01/24/2023]
Abstract
Catalytic antibodies made it feasible to develop new catalysts, which had previously been the subject of research. Scientists have discovered natural antibodies that can hydrolyze substrates such as nucleic acids, proteins, and polysaccharides during decades of research, as well as several ways of producing antibodies with specialized characteristics and catalytic functions. These antibodies are widely used in chemistry, biology, and medicine. Catalytic antibodies can continue to play a role and even fully prevent the emergence of autoimmune disorders, especially in the field of infection and immunity, where the process of its occurrence and development often takes a long time. In this work, the development, design and evolution methodologies, and the expression systems and applications of catalytic antibodies, are discussed. Trial registration: not applicable.
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Pandey R, Veeranki VD. Optimizing secretory expression of recombinant human interferon gamma from Kluyveromyces lactis. Prep Biochem Biotechnol 2018; 48:202-212. [DOI: 10.1080/10826068.2018.1425706] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Rajat Pandey
- Biochemical Engineering Laboratory, Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam, India
| | - Venkata Dasu Veeranki
- Biochemical Engineering Laboratory, Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam, India
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Akal HC, Öztürkoğlu Budak Ş, Yetisemiyen A. Potential Probiotic Microorganisms in Kefir. MICROBIAL CULTURES AND ENZYMES IN DAIRY TECHNOLOGY 2018. [DOI: 10.4018/978-1-5225-5363-2.ch015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Probiotic microorganisms are defined as living microorganisms that provide health benefits on the host when administered in adequate amounts. The benefits include improvement of microbial balance immune system and oral health, provision of cholesterol-lowering effect, and antimicrobial activity against a wide variety of bacteria and some fungi. Kefir microbiota contains active living microorganisms. Many researches were carried out that potential probiotic bacteria such as Lactobacillus acidophilus, Lactobacillus plantarum, Lactobacillus kefir, Lactobacillus kefiranofaciens, Leuconostoc mesenteroides, or yeasts like microorganisms such as Saccharomyces cerevisiae, Kluyveromyces lactis, and Kluyveromyces marxianus were isolated from kefir grains. This chapter presents the data both on the probiotic bacteria isolated from kefir grains or kefir and the probiotic properties of kefir produced with these microorganisms.
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Legastelois I, Buffin S, Peubez I, Mignon C, Sodoyer R, Werle B. Non-conventional expression systems for the production of vaccine proteins and immunotherapeutic molecules. Hum Vaccin Immunother 2016; 13:947-961. [PMID: 27905833 DOI: 10.1080/21645515.2016.1260795] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The increasing demand for recombinant vaccine antigens or immunotherapeutic molecules calls into question the universality of current protein expression systems. Vaccine production can require relatively low amounts of expressed materials, but represents an extremely diverse category consisting of different target antigens with marked structural differences. In contrast, monoclonal antibodies, by definition share key molecular characteristics and require a production system capable of very large outputs, which drives the quest for highly efficient and cost-effective systems. In discussing expression systems, the primary assumption is that a universal production platform for vaccines and immunotherapeutics will unlikely exist. This review provides an overview of the evolution of traditional expression systems, including mammalian cells, yeast and E.coli, but also alternative systems such as other bacteria than E. coli, transgenic animals, insect cells, plants and microalgae, Tetrahymena thermophila, Leishmania tarentolae, filamentous fungi, cell free systems, and the incorporation of non-natural amino acids.
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Affiliation(s)
| | - Sophie Buffin
- a Research and Development, Sanofi Pasteur , Marcy L'Etoile , France
| | - Isabelle Peubez
- a Research and Development, Sanofi Pasteur , Marcy L'Etoile , France
| | | | - Régis Sodoyer
- b Technology Research Institute Bioaster , Lyon , France
| | - Bettina Werle
- b Technology Research Institute Bioaster , Lyon , France
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Spohner SC, Schaum V, Quitmann H, Czermak P. Kluyveromyces lactis: An emerging tool in biotechnology. J Biotechnol 2016; 222:104-16. [DOI: 10.1016/j.jbiotec.2016.02.023] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 02/05/2016] [Accepted: 02/15/2016] [Indexed: 02/04/2023]
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Grigorenko VG, Andreeva IP, Rubtsova MY, Egorov AM. Recombinant horseradish peroxidase: Production and analytical applications. BIOCHEMISTRY (MOSCOW) 2015; 80:408-16. [DOI: 10.1134/s0006297915040033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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10
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Catalytic antibodies and their applications in biotechnology: state of the art. Biotechnol Lett 2014; 36:1369-79. [PMID: 24652545 DOI: 10.1007/s10529-014-1503-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 02/20/2014] [Indexed: 01/06/2023]
Abstract
Catalytic antibodies are immunoglobulins endowed with enzymatic properties. Discovered in the second part of the 1980s, the enthusiasm they initially aroused was counterbalanced by the difficulty of their production and their low catalytic rates. Nevertheless, improvements in expression systems and engineering technologies, combined with various studies suggesting that catalytic antibodies play a role in the immune system, have opened the way to new applications for these proteins. Herein we review catalytic antibodies from a biotechnological point of view, focusing our study on the different production methods, expression systems and their potential clinical applications dedicated to these proteins.
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Ayat H, Burrone OR, Sadghizadeh M, Jahanzad E, Rastgou N, Moghadasi S, Arbabi M. Isolation of scFv antibody fragments against HER2 and CEA tumor antigens from combinatorial antibody libraries derived from cancer patients. Biologicals 2013; 41:345-54. [DOI: 10.1016/j.biologicals.2013.05.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 04/29/2013] [Accepted: 05/28/2013] [Indexed: 12/23/2022] Open
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Zakharov AV, Smirnov IV, Serebryakova MV, Dronina MA, Kaznacheeva AV, Kurkova IN, Belogurov AA, Friboulet A, Ponomarenko NA, Gabibov AG, Bobik TV. Expression of catalytic antibodies in eukaryotic systems. Mol Biol 2011. [DOI: 10.1134/s0026893311010171] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Jafari R, Holm P, Piercecchi M, Sundström BE. Construction of divalent anti-keratin 8 single-chain antibodies (sc(Fv)(2)), expression in Pichia pastoris and their reactivity with multicellular tumor spheroids. J Immunol Methods 2010; 364:65-76. [PMID: 21093447 DOI: 10.1016/j.jim.2010.11.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2010] [Revised: 10/15/2010] [Accepted: 11/10/2010] [Indexed: 11/28/2022]
Abstract
Single-chain variable fragments (scFvs) are small monovalent recombinant antibody fragments that retain the specificity of their parent immunoglobulins. ScFvs are excellent building blocks for new and improved immunodiagnostic and therapeutic proteins. However, the monovalency and the rapid renal elimination of scFvs result in poor tumor accumulation and retention. Engineering divalent antibody fragments is an excellent way to address these shortcomings. In this study, covalent divalent single-chain variable fragments (sc(Fv)(2)s), were constructed from the monovalent anti-keratin 8 scFvs, TS1-218 and its mutant, HE1-Q. The scFvs and sc(Fv)(2)s were expressed in the methylotrophic yeast Pichia pastoris, utilizing the alpha-factor secretion signal (α-factor) for extracellular secretion. The immunoreactivity and specificity of the antibody fragments were analyzed with enzyme-linked immunosorbent assay (ELISA) and the uptake and retention of the (125)I labeled antibody fragments were evaluated using HeLa HEp-2 multicellular tumor spheroids (MCTSs). Analysis of the antibody fragments demonstrated that parts of the α-factor remained at the N-terminal of the antibody fragments. Despite incomplete processing of the α-factor, the antibody fragments were functional where the sc(Fv)(2)s gave a three-fold stronger signal in ELISA compared to their scFv counterparts and the mutant antibodies demonstrated a stronger signal than their initial wild types. In addition, the sc(Fv)(2)s DiTS1-218 and DiHE1-Q displayed an approximately two-fold higher uptake and were retained to a larger extent in the MCTS, demonstrating a 3.9 and 9.4-fold increase in half-life respectively compared to their corresponding scFvs. In conclusion, expression in P. pastoris improved the yield 20-fold and facilitated the purification of the antibody fragments. Furthermore, the sc(Fv)(2)s presented a higher functional affinity to K 8 both in ELISA and MCTS compared to the scFvs with DiHE1-Q being the best candidate for further studies.
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Affiliation(s)
- Rozbeh Jafari
- Department of Chemistry and Biomedical Sciences, Karlstad University, S-651 88 Karlstad, Sweden
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15
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Gasser B, Mattanovich D. Antibody production with yeasts and filamentous fungi: on the road to large scale? Biotechnol Lett 2006; 29:201-12. [PMID: 17120087 DOI: 10.1007/s10529-006-9237-x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2006] [Revised: 10/11/2006] [Accepted: 10/11/2006] [Indexed: 10/23/2022]
Abstract
Yeasts and filamentous fungi have gained significant interest for the production of recombinant antibodies and antibody fragments. The opportunities and constraints of antibody (fragment) production in these hosts are highlighted as well as cell engineering strategies to overcome the constraints. Following aspects are addressed: folding, assembly and secretion of antibody related proteins, process optimization to improve productivity and quality, proteolysis, and, as a major point of interest, glycosylation.
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Affiliation(s)
- Brigitte Gasser
- Institute of Applied Microbiology, Department of Biotechnology, University of Natural Resources and Applied Life Sciences, Vienna, Austria
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van Ooyen AJJ, Dekker P, Huang M, Olsthoorn MMA, Jacobs DI, Colussi PA, Taron CH. Heterologous protein production in the yeastKluyveromyces lactis. FEMS Yeast Res 2006; 6:381-92. [PMID: 16630278 DOI: 10.1111/j.1567-1364.2006.00049.x] [Citation(s) in RCA: 147] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Kluyveromyces lactis is both scientifically and biotechnologically one of the most important non-Saccharomyces yeasts. Its biotechnological significance builds on its history of safe use in the food industry and its well-known ability to produce enzymes like lactase and bovine chymosin on an industrial scale. In this article, we review the various strains, genetic techniques and molecular tools currently available for the use of K. lactis as a host for protein expression. Additionally, we present data illustrating the recent use of proteomics studies to identify cellular bottlenecks that impede heterologous protein expression.
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Monedero V, Rodríguez-Díaz J, Viana R, Buesa J, Pérez-Martínez G. Selection of single-chain antibodies against the VP8* subunit of rotavirus VP4 outer capsid protein and their expression in Lactobacillus casei. Appl Environ Microbiol 2005; 70:6936-9. [PMID: 15528568 PMCID: PMC525132 DOI: 10.1128/aem.70.11.6936-6939.2004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Single-chain antibodies (scFv) recognizing the VP8* fraction of rotavirus outer capsid and blocking rotavirus infection in vitro were isolated by phage display. Vectors for the extracellular expression in Lactobacillus casei of one of the scFv were constructed. L. casei was able to secrete active scFv to the growth medium, showing the potential of probiotic bacteria to be engineered to express molecules suitable for in vivo antirotavirus therapies.
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Affiliation(s)
- Vicente Monedero
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de Alimentos (CSIC), Burjassot, Spain
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Rodríguez-Díaz J, Monedero V, Pérez-Martínez G, Buesa J. Single-chain variable fragment (scFv) antibodies against rotavirus NSP4 enterotoxin generated by phage display. J Virol Methods 2004; 121:231-8. [PMID: 15381361 DOI: 10.1016/j.jviromet.2004.07.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2004] [Revised: 07/06/2004] [Accepted: 07/07/2004] [Indexed: 11/24/2022]
Abstract
The rotavirus non-structural NSP4 protein causes membrane destabilization as well as an increase in intracellular calcium levels in eukaryotic cells and induces diarrhea in young mice, acting as a viral enterotoxin. In this study the phage display technique was used to generate a panel of single-chain variable fragment (scFv) antibodies specific for the NSP4 protein of the human rotavirus strain Wa from a human semi-synthetic scFv library. After several rounds of panning and selection on NSP4 adsorbed to polystyrene tubes, individual scFv were isolated and characterised by fingerprinting and by sequencing the VH and VL genes. The isolated scFv antibodies specifically recognize NSP4 in enzyme immunoassay and in Western blot. Four truncated forms of the NSP4 protein were constructed which allowed us to map the binding region of the selected scFv antibodies to the C-terminal portion of NSP4. The isolated scFv antibodies constitute valuable tools to analyse the mechanisms of NSP4 functions.
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Affiliation(s)
- Jesús Rodríguez-Díaz
- Department of Microbiology, School of Medicine, University of Valencia, Hospital Clinico Universitario, Avda. Blasco Ibañez 17, 46010 Valencia, Spain
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Petrov K, Dion M, Hoffmann L, Dintinger T, Defontaine A, Tellier C. Bivalent Fv antibody fragments obtained by substituting the constant domains of a fab fragment with heterotetrameric molybdopterin synthase. J Mol Biol 2004; 341:1039-48. [PMID: 15328616 DOI: 10.1016/j.jmb.2004.06.075] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2004] [Revised: 06/16/2004] [Accepted: 06/18/2004] [Indexed: 11/30/2022]
Abstract
The antibody Fv fragment is the smallest functional unit of an antibody but for practical use, the VH/VL interface requires stabilization, which is usually accomplished by a peptide linker that joins the two variable domains to form a single chain Fv fragment (scFv). An alternative format to scFv is proposed that (i) allows stabilization of the Fv fragment, and (ii) restores the bivalency of the antibody as a pseudo-F(ab')2 format. This new antibody fragment was constructed by replacing the CHI and CL domains of the Fab fragment with heterotetrameric molybdopterin synthase (MPTS). We found that this format, named MoaFv, improved significantly the cytoplasmic expression of the Fv as a soluble protein in BL21 or Origami Escherichia coli strains. This MoaFv format is expressed as a homogeneous heterotetrameric protein with a Mr value of 110 kDa containing two functional binding sites as revealed by active site titration. In its native condition at 37 degrees C or in the presence of urea, this format was nearly as stable as the corresponding scFv, indicating that non-covalent interactions between the MPTS subunits can replace the covalent peptide linker in scFv. Finally, this MoaFv construct could be a useful format when bivalency is desirable to improve the functional avidity.
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Affiliation(s)
- Kliment Petrov
- UMR-CNRS n degrees 6204, Biotechnoligie, Biocatalyse et Bioréegulation, Nates cedex, France
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