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Senra RL, Pereira HS, Schittino LMP, Fontes PP, de Oliveira TA, Ribon ADOB, Fietto JLR, Vilela LFF, Fiúza JA, Mendes TADO. Co-expression of human sialyltransferase improves N-glycosylation in Leishmania tarentolae and optimizes the production of humanized therapeutic glycoprotein IFN-beta. J Biotechnol 2024; 394:24-33. [PMID: 39103019 DOI: 10.1016/j.jbiotec.2024.08.002] [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: 04/08/2024] [Revised: 06/26/2024] [Accepted: 08/02/2024] [Indexed: 08/07/2024]
Abstract
The production of therapeutic glycoproteins is primarily expensive due to the necessity of culturing mammalian cells. These systems often require complex and costly culture media and typically yield low amounts of protein. Leishmania tarentolae, a non-pathogenic protozoan to mammals, has emerged as a cost-effective alternative system for heterologous glycoprotein expression due to its suitability for large-scale production using low-cost culture media, and its ability to perform mammalian-like post-translational modifications, including glycosylation. Nevertheless, differences in the carbohydrate residues at the end of N-glycan chains are observed in Leishmania compared to mammalian cells due to the absence of biosynthetic enzymes in Leishmania that are required for the incorporation of terminal sialic acid. In this study, a genetically optimized L. tarentolae cell line was engineered for the production of recombinant interferon-β (IFN-β) featuring a complete mammalian N-glycosylation profile. Genomic and metabolomic analyses revealed that heterologous expression of the sialyltransferase enzyme and cultivation in a medium containing sialic acid were sufficient to generate mammalian-like protein N-glycosylation. N-glycan mass spectrometry analysis demonstrated a glycosylation pattern compatible with the incorporation of sialic acid into the glycan structure. In vitro IFN-β activity indicated that the expressed protein exhibited reduced inflammatory effects compared to IFN-beta produced by other platforms, such as bacteria, non-optimized L. tarentolae, and mammalian cells.
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Affiliation(s)
- Renato Lima Senra
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Av. P. H, Rolfs s/n, Viçosa 36570-900, Brazil.
| | - Higor Sette Pereira
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Av. P. H, Rolfs s/n, Viçosa 36570-900, Brazil
| | - Luana Maria Pacheco Schittino
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Av. P. H, Rolfs s/n, Viçosa 36570-900, Brazil
| | - Patrícia Pereira Fontes
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Av. P. H, Rolfs s/n, Viçosa 36570-900, Brazil
| | - Tatiana Aparecida de Oliveira
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Av. P. H, Rolfs s/n, Viçosa 36570-900, Brazil
| | - Andrea de Oliveira Barros Ribon
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Av. P. H, Rolfs s/n, Viçosa 36570-900, Brazil
| | - Juliana Lopes Rangel Fietto
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Av. P. H, Rolfs s/n, Viçosa 36570-900, Brazil
| | | | - Jacqueline Araújo Fiúza
- Instituto de Ciências Biológicas - Universidade Federal de Minas Gerais, Belo Horizonte, Brazil; Instituto Renne Rocheau - Fiocruz Minas, Belo Horizonte, Brazil
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Kalef DA. Leishmania mexicana recombinant filamentous acid phosphatase as carrier for Toxoplasma gondii surface antigen 1 expression in Leishmania tarentolae. J Parasit Dis 2021; 45:1135-1144. [PMID: 34177154 PMCID: PMC8211313 DOI: 10.1007/s12639-021-01413-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 06/07/2021] [Indexed: 12/02/2022] Open
Abstract
Leishmania tarentolae has been used to produce recombinant intracellular and secreted proteins for their easy handling and posttranslational modifications. Filamentous acid phosphatase is a multimeric protein complex composed of many subunits assembled in a linear highly glycosylated filament, which is secreted in vast amounts into the culture supernatant via the flagellar pocket of Leishmania mexicana promastigotes. This suggested that the protein could be used as a carrier for the Surface Antigen1 protein of a Toxoplasma gondii (SAG1) for easy purification to generate a protein with multiple SAG1 subunits suitable for immunisation. SAG1 has an immunodominant structure that is involved in binding to host cells. Previous studies used this surface protein for vaccination for its immunological importance for triggering a type 1 immune response in the host. This study aims to determine the production of recombinant filamentous protein carried subunits of the surface protein of Toxoplasma gondii for vaccination purposes. Leishmania codon-optimised SAG1 was cloned as a fusion construct into pLEXSY-ble2.1 plasmid and introduced into Leishmania tarentolae to generate recombinant cell lines expressing a filamentous fusion protein called SAP2SAG1. PCR confirmed the correct integration into the small ribosomal subunit RNA gene locus of Leishmania tarentolae. Immunofluorescences and Immunoblot analyses were used to detect the fusion protein in the sediment of culture supernatants of recombinant L. tarentolae promastigotes after purification by ultracentrifugation. The yield of purified protein was low that suggested further investigations of other methods for scaling large production of secreted protein.
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Affiliation(s)
- Dalia Ahmed Kalef
- Department of Parasitology, University of Baghdad, Baghdad city, Iraq
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