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Müller C, Budnik N, Mirkin FG, Vater CF, Bravo-Almonacid FF, Perez-Castro C, Wirth SA, Segretin ME. Production of biologically active human basic fibroblast growth factor (hFGFb) using Nicotiana tabacum transplastomic plants. PLANTA 2024; 260:28. [PMID: 38878167 DOI: 10.1007/s00425-024-04456-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 06/02/2024] [Indexed: 06/29/2024]
Abstract
MAIN CONCLUSION We generated transplastomic tobacco lines that stably express a human Basic Fibroblast Growth Factor (hFGFb) in their chloroplasts stroma and purified a biologically active recombinant hFGFb. MAIN: The use of plants as biofactories presents as an attractive technology with the potential to efficiently produce high-value human recombinant proteins in a cost-effective manner. Plastid genome transformation stands out for its possibility to accumulate recombinant proteins at elevated levels. Of particular interest are recombinant growth factors, given their applications in animal cell culture and regenerative medicine. In this study, we produced recombinant human Fibroblast Growth Factor (rhFGFb), a crucial protein required for animal cell culture, in tobacco chloroplasts. We successfully generated two independent transplastomic lines that are homoplasmic and accumulate rhFGFb in their leaves. Furthermore, the produced rhFGFb demonstrated its biological activity by inducing proliferation in HEK293T cell lines. These results collectively underscore plastid genome transformation as a promising plant-based bioreactor for rhFGFb production.
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Affiliation(s)
- Carolina Müller
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres" (INGEBI-CONICET), Vuelta de Obligado 2490, Ciudad Autónoma Buenos Aires, C1428ADN, Argentina
| | - Nicolás Budnik
- Instituto de Investigación en Biomedicina de Buenos Aires (IBioBA-CONICET)- Partner Institute of the Max Planck Society, Godoy Cruz 2390, Ciudad Autónoma Buenos Aires, C1425FQ, Argentina
| | - Federico Gabriel Mirkin
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres" (INGEBI-CONICET), Vuelta de Obligado 2490, Ciudad Autónoma Buenos Aires, C1428ADN, Argentina
| | - Catalina Francisca Vater
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres" (INGEBI-CONICET), Vuelta de Obligado 2490, Ciudad Autónoma Buenos Aires, C1428ADN, Argentina
| | - Fernando Félix Bravo-Almonacid
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres" (INGEBI-CONICET), Vuelta de Obligado 2490, Ciudad Autónoma Buenos Aires, C1428ADN, Argentina
- Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Roque Sáenz Peña 352, Bernal, Buenos Aires, B1876BXD, Argentina
| | - Carolina Perez-Castro
- Instituto de Investigación en Biomedicina de Buenos Aires (IBioBA-CONICET)- Partner Institute of the Max Planck Society, Godoy Cruz 2390, Ciudad Autónoma Buenos Aires, C1425FQ, Argentina
| | - Sonia Alejandra Wirth
- Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA-CONICET-UBA), Intendente Güiraldes 2160, Ciudad Autónoma Buenos Aires, C1428EGA, Argentina
- Laboratorio de Agrobiotecnología, Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Ciudad Autónoma Buenos Aires, C1428EGA, Argentina
| | - María Eugenia Segretin
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres" (INGEBI-CONICET), Vuelta de Obligado 2490, Ciudad Autónoma Buenos Aires, C1428ADN, Argentina.
- Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Ciudad Autónoma Buenos Aires, C1428EGA, Argentina.
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2
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Homecoming: rewinding the reductive evolution of the chloroplast genome for increasing crop yields. Nat Commun 2021; 12:6734. [PMID: 34795241 PMCID: PMC8602674 DOI: 10.1038/s41467-021-26975-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 10/28/2021] [Indexed: 11/29/2022] Open
Abstract
Developing more productive and sustainable crops will be essential to achieving food security in coming decades. A core process in plant evolution has been the transfer of chloroplast-encoded genes to the nuclear genome. We propose reverting this process as a new approach to improve plant disease resistance and photosynthesis in future crops.
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Morgenfeld MM, Vater CF, Alfano EF, Boccardo NA, Bravo-Almonacid FF. Translocation from the chloroplast stroma into the thylakoid lumen allows expression of recombinant epidermal growth factor in transplastomic tobacco plants. Transgenic Res 2020; 29:295-305. [PMID: 32318934 DOI: 10.1007/s11248-020-00199-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 04/13/2020] [Indexed: 12/20/2022]
Abstract
Chloroplast transformation has many potential advantages for the production of recombinant proteins in plants. However, it has been reported that chloroplast expression of many proteins, such as human epidermal growth factor (hEGF), results hindered by post-transcriptional mechanisms. hEGF degradation has been related to the redox potential of the stroma and protein misfolding. To solve this problem, we proposed the redirection of hEGF into the thylakoid lumen where the environment could improve disulfide bonds formation stabilizing the functional conformation of the protein. We generated transplastomic tobacco plants targeting hEGF protein to the thylakoid lumen by adding a transit peptide (Str). Following this approach, we could detect thylakoid lumen-targeted hEGF by western blotting while stromal accumulation of hEGF remained undetectable. Southern blot analysis confirmed the integration of the transgene through homologous recombination into the plastome. Northern blot analysis showed similar levels of egf transcripts in the EGF and StrEGF lines. These results suggest that higher stability of the hEGF peptide in the thylakoid lumen is the primary cause of the increased accumulation of the recombinant protein observed in StrEGF lines. They also highlight the necessity of exploring different sub-organellar destinations to improve the accumulation levels of a specific recombinant protein in plastids.
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Affiliation(s)
- Mauro M Morgenfeld
- Instituto de Ingeniería Genética y Biología Molecular "Dr, Héctor Torres" (INGEBI-CONICET), Vuelta de Obligado 2490, Ciudad Autónoma de Buenos Aires, Argentina
- Departamento de Fisiología, Biología Molecular y Celular (FCEN-UBA), Buenos Aires, Argentina
| | - Catalina F Vater
- Instituto de Ingeniería Genética y Biología Molecular "Dr, Héctor Torres" (INGEBI-CONICET), Vuelta de Obligado 2490, Ciudad Autónoma de Buenos Aires, Argentina
| | - E Federico Alfano
- Instituto de Ingeniería Genética y Biología Molecular "Dr, Héctor Torres" (INGEBI-CONICET), Vuelta de Obligado 2490, Ciudad Autónoma de Buenos Aires, Argentina
| | - Noelia A Boccardo
- Instituto de Ingeniería Genética y Biología Molecular "Dr, Héctor Torres" (INGEBI-CONICET), Vuelta de Obligado 2490, Ciudad Autónoma de Buenos Aires, Argentina
| | - Fernando F Bravo-Almonacid
- Instituto de Ingeniería Genética y Biología Molecular "Dr, Héctor Torres" (INGEBI-CONICET), Vuelta de Obligado 2490, Ciudad Autónoma de Buenos Aires, Argentina.
- Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina.
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4
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Liu X, Qi L, Lv J, Zhang Z, Zhou P, Ma Z, Wang Y, Zhang Y, Pan L. The immune response to a recombinant Lactococcus lactis oral vaccine against foot-and-mouth disease virus in mice. Biotechnol Lett 2020; 42:1907-1917. [PMID: 32385744 PMCID: PMC7210100 DOI: 10.1007/s10529-020-02900-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 04/24/2020] [Indexed: 11/11/2022]
Abstract
Objective Development of an effective mucosal vaccine to induce specific immune responses against Foot-and-mouth disease virus (FMDV). Results For this purpose, the FMDV VP1 gene (SPVP1) was optimized and synthesized based on the codon bias of Lactococcus lactis (L. lactis), and then incorporated in the plasmid pNZ8148. L. lactis NZ9000 containing the pNZ8148-SPVP1 recombinant plasmid was used as an oral delivery vehicle to induce anti-FMDV mucosal and systemic immune responses in mice. After confirmation that the SPVP1 protein was expressed successfully in the recombinant L. latic, the mice were orally challenged with NZ9000-pNZ8148, NZ9000-pNZ8148-SPVP1, phosphate-buffered saline as a mock infection group, or with inactivated vaccine as a positive group. Mice immunized with NZ9000-pNZ8148-SPVP1 produced high levels of mucosal secretory IgA (sIgA), antigen-specific serum IgG, IgA, and neutralizing antibodies, and developed stronger cell-mediated immune reactions and significant T spleen lymphocyte proliferation. Furthermore, the recombinant group generated much higher levels of IFN-γ, IL-2, IL-4, IL-5, and IL-10 than the other groups. Conclusions Potent immune responses were successfully elicited in mice with FMDV VP1 delivered through L. lactis.
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Affiliation(s)
- Xinsheng Liu
- State Key Laboratory of Veterinary Etiological Biology, National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, China
| | - Linlin Qi
- State Key Laboratory of Veterinary Etiological Biology, National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, China
| | - Jianliang Lv
- State Key Laboratory of Veterinary Etiological Biology, National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, China
| | - Zhongwang Zhang
- State Key Laboratory of Veterinary Etiological Biology, National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, China.
| | - Peng Zhou
- State Key Laboratory of Veterinary Etiological Biology, National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, China
| | - Zhongyuan Ma
- State Key Laboratory of Veterinary Etiological Biology, National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, China
| | - Yonglu Wang
- State Key Laboratory of Veterinary Etiological Biology, National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, China
| | - Yongguang Zhang
- State Key Laboratory of Veterinary Etiological Biology, National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China
| | - Li Pan
- State Key Laboratory of Veterinary Etiological Biology, National Foot-and-Mouth Disease Reference Laboratory, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China.
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Ancín M, Sanz-Barrio R, Santamaría E, Fernández-San Millán A, Larraya L, Veramendi J, Farran I. Functional Improvement of Human Cardiotrophin 1 Produced in Tobacco Chloroplasts by Co-expression with Plastid Thioredoxin m. PLANTS 2020; 9:plants9020183. [PMID: 32024318 PMCID: PMC7076529 DOI: 10.3390/plants9020183] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/24/2020] [Accepted: 01/30/2020] [Indexed: 12/24/2022]
Abstract
Human cardiotrophin 1 (CT1), a cytokine with excellent therapeutic potential, was previously expressed in tobacco chloroplasts. However, the growth conditions required to reach the highest expression levels resulted in an impairment of its bioactivity. In the present study, we have examined new strategies to modulate the expression of this recombinant protein in chloroplasts so as to enhance its production and bioactivity. In particular, we assessed the effect of both the fusion and co-expression of Trx m with CT1 on the production of a functional CT1 by using plastid transformation. Our data revealed that the Trx m fusion strategy was useful to increase the expression levels of CT1 inside the chloroplasts, although CT1 bioactivity was significantly impaired, and this was likely due to steric hindrance between both proteins. By contrast, the expression of functional CT1 was increased when co-expressed with Trx m, because we demonstrated that recombinant CT1 was functionally active during an in vitro signaling assay. While Trx m/CT1 co-expression did not increase the amount of CT1 in young leaves, our results revealed an increase in CT1 protein stability as the leaves aged in this genotype, which also improved the recombinant protein's overall production. This strategy might be useful to produce other functional biopharmaceuticals in chloroplasts.
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Affiliation(s)
- María Ancín
- Institute for Multidisciplinary Research in Applied Biology, UPNA, 31006 Pamplona, Spain; (M.A.); (A.F.-S.M.); (L.L.); (J.V.)
| | - Ruth Sanz-Barrio
- National Centre for Biotechnology, Plant Molecular Genetics Department, CSIC, 28049 Madrid, Spain
| | - Eva Santamaría
- Hepatology Program, University of Navarra, CIMA, E-31008 Pamplona, Spain;
- CIBERehd, Instituto de Salud Carlos III, 28220 Majadahonda, Madrid, Spain
| | - Alicia Fernández-San Millán
- Institute for Multidisciplinary Research in Applied Biology, UPNA, 31006 Pamplona, Spain; (M.A.); (A.F.-S.M.); (L.L.); (J.V.)
| | - Luis Larraya
- Institute for Multidisciplinary Research in Applied Biology, UPNA, 31006 Pamplona, Spain; (M.A.); (A.F.-S.M.); (L.L.); (J.V.)
| | - Jon Veramendi
- Institute for Multidisciplinary Research in Applied Biology, UPNA, 31006 Pamplona, Spain; (M.A.); (A.F.-S.M.); (L.L.); (J.V.)
| | - Inmaculada Farran
- Institute for Multidisciplinary Research in Applied Biology, UPNA, 31006 Pamplona, Spain; (M.A.); (A.F.-S.M.); (L.L.); (J.V.)
- Correspondence: ; Tel.: +34-948-168034
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6
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Fumagalli M, Gerace D, Faè M, Iadarola P, Leelavathi S, Reddy VS, Cella R. Molecular, biochemical, and proteomic analyses of transplastomic tobacco plants expressing an endoglucanase support chloroplast-based molecular farming for industrial scale production of enzymes. Appl Microbiol Biotechnol 2019; 103:9479-9491. [PMID: 31701198 DOI: 10.1007/s00253-019-10186-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 10/01/2019] [Accepted: 10/07/2019] [Indexed: 01/02/2023]
Abstract
The successful production of recombinant enzymes by tobacco transplastomic plants must maintain compatibility of the heterologous enzyme with chloroplast metabolism and its long-time enzyme stability. Based on previous reports, it has been taken for granted that following biolistic-transformation, homoplasticity could be obtained from the initially heteroplastic state following successive rounds of selection in the presence of the selection agent. However, several studies indicated that this procedure does not always ensure the complete elimination of unmodified wild-type plastomes. The present study demonstrates that CelK1 transplastomic plants, which were photosyntetically as active as untransformed ones, remain heteroplastomic even after repeated selection steps and that this state does not impair the relatively high-level production of the recombinant enzyme. In fact, even in the heteroplastomic state, the recombinant protein represented about 6% of the total soluble proteins (TSP). Moreover, our data also show that, while the recombinant endoglucanase undergoes phosphorylation, this post-translation modification does not have any significant impact on the enzymatic activity. Biomass storage might be required whenever the enzyme extraction process could not be performed immediately following the harvest of tobacco mature plants. In this respect, we have observed that enzyme activity in the detached leaves stored at 4 °C is maintained up to 20 weeks without significant loss of activity. These findings may have major implications in the future of chloroplast genetic engineering-based molecular farming to produce industrial enzymes in transplastomic plants.
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Affiliation(s)
- M Fumagalli
- Department of Biology and Biotechnology, University of Pavia, Via Ferrata 9, 27100, Pavia, Italy
| | - D Gerace
- Department of Biology and Biotechnology, University of Pavia, Via Ferrata 9, 27100, Pavia, Italy
| | - M Faè
- Department of Biology and Biotechnology, University of Pavia, Via Ferrata 9, 27100, Pavia, Italy
| | - P Iadarola
- Department of Biology and Biotechnology, University of Pavia, Via Ferrata 9, 27100, Pavia, Italy
| | - S Leelavathi
- Plant Transformation Group, International Center for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - V S Reddy
- Plant Transformation Group, International Center for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Rino Cella
- Department of Biology and Biotechnology, University of Pavia, Via Ferrata 9, 27100, Pavia, Italy.
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7
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Boccardo NA, Segretin ME, Hernandez I, Mirkin FG, Chacón O, Lopez Y, Borrás-Hidalgo O, Bravo-Almonacid FF. Expression of pathogenesis-related proteins in transplastomic tobacco plants confers resistance to filamentous pathogens under field trials. Sci Rep 2019; 9:2791. [PMID: 30808937 PMCID: PMC6391382 DOI: 10.1038/s41598-019-39568-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 01/25/2019] [Indexed: 01/18/2023] Open
Abstract
Plants are continuously challenged by pathogens, affecting most staple crops compromising food security. They have evolved different mechanisms to counterattack pathogen infection, including the accumulation of pathogenesis-related (PR) proteins. These proteins have been implicated in active defense, and their overexpression has led to enhanced resistance in nuclear transgenic plants, although in many cases constitutive expression resulted in lesion-mimic phenotypes. We decided to evaluate plastid transformation as an alternative to overcome limitations observed for nuclear transgenic technologies. The advantages include the possibilities to express polycistronic RNAs, to obtain higher protein expression levels, and the impeded gene flow due to the maternal inheritance of the plastome. We transformed Nicotiana tabacum plastids to co-express the tobacco PR proteins AP24 and β-1,3-glucanase. Transplastomic tobacco lines were characterized and subsequently challenged with Rhizoctonia solani, Peronospora hyoscyami f.sp. tabacina and Phytophthora nicotianae. Results showed that transplastomic plants expressing AP24 and β-1,3-glucanase are resistant to R. solani in greenhouse conditions and, furthermore, they are protected against P.hyoscyami f.sp. tabacina and P. nicotianae in field conditions under high inoculum pressure. Our results suggest that plastid co- expression of PR proteins AP24 and β-1,3-glucanase resulted in enhanced resistance against filamentous pathogens.
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Affiliation(s)
- Noelia Ayelen Boccardo
- Laboratorio de Biotecnología Vegetal, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres" (INGEBI-CONICET), (C1428ADN), Ciudad Autónoma de Buenos Aires, Argentina
| | - María Eugenia Segretin
- Laboratorio de Biotecnología Vegetal, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres" (INGEBI-CONICET), (C1428ADN), Ciudad Autónoma de Buenos Aires, Argentina.
- Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, (C1428EGA), Ciudad Autónoma de Buenos Aires, Argentina.
| | - Ingrid Hernandez
- Centro de Ingeniería Genética y Biotecnología (CIGB), (10600), La Habana, Cuba
| | - Federico Gabriel Mirkin
- Laboratorio de Biotecnología Vegetal, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres" (INGEBI-CONICET), (C1428ADN), Ciudad Autónoma de Buenos Aires, Argentina
| | - Osmani Chacón
- Centro de Ingeniería Genética y Biotecnología (CIGB), (10600), La Habana, Cuba
| | - Yunior Lopez
- Centro de Ingeniería Genética y Biotecnología (CIGB), (10600), La Habana, Cuba
| | - Orlando Borrás-Hidalgo
- Centro de Ingeniería Genética y Biotecnología (CIGB), (10600), La Habana, Cuba
- Shandong Provincial Key Laboratory of Microbial Engineering, School of Biotechnology, Qi Lu University of Technology, Jinan, (250353), P.R. China
| | - Fernando Félix Bravo-Almonacid
- Laboratorio de Biotecnología Vegetal, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres" (INGEBI-CONICET), (C1428ADN), Ciudad Autónoma de Buenos Aires, Argentina.
- Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, (B1876BXD), Argentina.
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Castiglia D, Leone S, Tamburino R, Sannino L, Fonderico J, Melchiorre C, Carpentieri A, Grillo S, Picone D, Scotti N. High-level production of single chain monellin mutants with enhanced sweetness and stability in tobacco chloroplasts. PLANTA 2018; 248:465-476. [PMID: 29777363 DOI: 10.1007/s00425-018-2920-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 05/14/2018] [Indexed: 06/08/2023]
Abstract
MAIN CONCLUSION Plastid-based MNEI protein mutants retain the structure, stability and sweetness of their bacterial counterparts, confirming the attractiveness of the plastid transformation technology for high-yield production of recombinant proteins. The prevalence of obesity and diabetes has dramatically increased the industrial demand for the development and use of alternatives to sugar and traditional sweeteners. Sweet proteins, such as MNEI, a single chain derivative of monellin, are the most promising candidates for industrial applications. In this work, we describe the use of tobacco chloroplasts as a stable plant expression platform to produce three MNEI protein mutants with improved taste profile and stability. All plant-based proteins were correctly expressed in tobacco chloroplasts, purified and subjected to in-depth chemical and sensory analyses. Recombinant MNEI mutants showed a protein yield ranging from 5% to more than 50% of total soluble proteins, which, to date, represents the highest accumulation level of MNEI mutants in plants. Comparative analyses demonstrated the high similarity, in terms of structure, stability and function, of the proteins produced in plant chloroplasts and bacteria. The high yield and the extreme sweetness perceived for the plant-derived proteins prove that plastid transformation technology is a safe, stable and cost-effective production platform for low-calorie sweeteners, with an estimated production of up to 25-30 mg of pure protein/plant.
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Affiliation(s)
- Daniela Castiglia
- CNR-IBBR, National Research Council of Italy, Institute of Biosciences and BioResources, Portici, NA, Italy
| | - Serena Leone
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Rachele Tamburino
- CNR-IBBR, National Research Council of Italy, Institute of Biosciences and BioResources, Portici, NA, Italy
| | - Lorenza Sannino
- CNR-IBBR, National Research Council of Italy, Institute of Biosciences and BioResources, Portici, NA, Italy
| | - Jole Fonderico
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Chiara Melchiorre
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Andrea Carpentieri
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Stefania Grillo
- CNR-IBBR, National Research Council of Italy, Institute of Biosciences and BioResources, Portici, NA, Italy
| | - Delia Picone
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Nunzia Scotti
- CNR-IBBR, National Research Council of Italy, Institute of Biosciences and BioResources, Portici, NA, Italy.
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9
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Shahid N, Daniell H. Plant-based oral vaccines against zoonotic and non-zoonotic diseases. PLANT BIOTECHNOLOGY JOURNAL 2016; 14:2079-2099. [PMID: 27442628 PMCID: PMC5095797 DOI: 10.1111/pbi.12604] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Revised: 07/18/2016] [Accepted: 07/19/2016] [Indexed: 05/10/2023]
Abstract
The shared diseases between animals and humans are known as zoonotic diseases and spread infectious diseases among humans. Zoonotic diseases are not only a major burden to livestock industry but also threaten humans accounting for >60% cases of human illness. About 75% of emerging infectious diseases in humans have been reported to originate from zoonotic pathogens. Because antibiotics are frequently used to protect livestock from bacterial diseases, the development of antibiotic-resistant strains of epidemic and zoonotic pathogens is now a major concern. Live attenuated and killed vaccines are the only option to control these infectious diseases and this approach has been used since 1890. However, major problems with this approach include high cost and injectable vaccines is impractical for >20 billion poultry animals or fish in aquaculture. Plants offer an attractive and affordable platform for vaccines against animal diseases because of their low cost, and they are free of attenuated pathogens and cold chain requirement. Therefore, several plant-based vaccines against human and animals diseases have been developed recently that undergo clinical and regulatory approval. Plant-based vaccines serve as ideal booster vaccines that could eliminate multiple boosters of attenuated bacteria or viruses, but requirement of injectable priming with adjuvant is a current limitation. So, new approaches like oral vaccines are needed to overcome this challenge. In this review, we discuss the progress made in plant-based vaccines against zoonotic or other animal diseases and future challenges in advancing this field.
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Affiliation(s)
- Naila Shahid
- Department of Biochemistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Henry Daniell
- Department of Biochemistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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10
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Castiglia D, Sannino L, Marcolongo L, Ionata E, Tamburino R, De Stradis A, Cobucci-Ponzano B, Moracci M, La Cara F, Scotti N. High-level expression of thermostable cellulolytic enzymes in tobacco transplastomic plants and their use in hydrolysis of an industrially pretreated Arundo donax L. biomass. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:154. [PMID: 27453729 PMCID: PMC4957871 DOI: 10.1186/s13068-016-0569-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 07/12/2016] [Indexed: 05/06/2023]
Abstract
BACKGROUND Biofuels production from plant biomasses is a complex multi-step process with important economic burdens. Several biotechnological approaches have been pursued to reduce biofuels production costs. The aim of the present study was to explore the production in tobacco plastome of three genes encoding (hemi)cellulolytic enzymes from thermophilic and hyperthermophilic bacterium and Archaea, respectively, and test their application in the bioconversion of an important industrially pretreated biomass feedstock (A. donax) for production of second-generation biofuels. RESULTS The selected enzymes, endoglucanase, endo-β-1,4-xylanase and β-glucosidase, were expressed in tobacco plastome with a protein yield range from 2 % to more than 75 % of total soluble proteins (TSP). The accumulation of endoglucanase (up to 2 % TSP) gave altered plant phenotypes whose severity was directly linked to the enzyme yield. The most severe seedling-lethal phenotype was due to the impairment of plastid development associated to the binding of endoglucanase protein to thylakoids. Endo-β-1,4-xylanase and β-glucosidase, produced at very high level without detrimental effects on plant development, were enriched (fourfold) by heat treatment (105.4 and 255.4 U/mg, respectively). Both plastid-derived biocatalysts retained the main features of the native or recombinantly expressed enzymes with interesting differences. Plastid-derived xylanase and β-glucosidase resulted more thermophilic than the E. coli recombinant and native counterpart, respectively. Bioconversion experiments, carried out at 50 and 60 °C, demonstrated that plastid-derived enzymes were able to hydrolyse an industrially pretreated giant reed biomass. In particular, the replacement of commercial enzyme with plastid-derived xylanase, at 60 °C, produced an increase of both xylose recovery and hydrolysis rate; whereas the replacement of both xylanase and β-glucosidase produced glucose levels similar to those observed with the commercial cocktails, and xylose yields always higher in the whole 24-72 h range. CONCLUSIONS The very high production level of thermophilic and hyperthermophilic enzymes, their stability and bioconversion efficiencies described in this study demonstrate that plastid transformation represents a real cost-effective production platform for cellulolytic enzymes.
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Affiliation(s)
- Daniela Castiglia
- />CNR-IBBR UOS Portici, National Research Council of Italy, Institute of Biosciences and BioResources, Research Division Portici, Via Università 133, 80055 Portici, NA Italy
| | - Lorenza Sannino
- />CNR-IBBR UOS Portici, National Research Council of Italy, Institute of Biosciences and BioResources, Research Division Portici, Via Università 133, 80055 Portici, NA Italy
| | - Loredana Marcolongo
- />CNR-IBBR UOS Naples, National Research Council of Italy, Institute of Biosciences and BioResources, Research Division Naples, Via P. Castellino 111, Naples, Italy
- />CNR-IBAF UOS Napoli, National Research Council of Italy, Institute of Agro-environmental and Forest Biology, Research Division Naples, Via P. Castellino 111, Naples, Italy
| | - Elena Ionata
- />CNR-IBBR UOS Naples, National Research Council of Italy, Institute of Biosciences and BioResources, Research Division Naples, Via P. Castellino 111, Naples, Italy
- />CNR-IBAF UOS Napoli, National Research Council of Italy, Institute of Agro-environmental and Forest Biology, Research Division Naples, Via P. Castellino 111, Naples, Italy
| | - Rachele Tamburino
- />CNR-IBBR UOS Portici, National Research Council of Italy, Institute of Biosciences and BioResources, Research Division Portici, Via Università 133, 80055 Portici, NA Italy
| | - Angelo De Stradis
- />CNR-IPSP UOS Bari, National Research Council of Italy, Institute for Sustainable Plant Protection, Research Division Bari, Via Amendola 165/A, 70126 Bari, Italy
| | - Beatrice Cobucci-Ponzano
- />CNR-IBBR UOS Naples, National Research Council of Italy, Institute of Biosciences and BioResources, Research Division Naples, Via P. Castellino 111, Naples, Italy
| | - Marco Moracci
- />CNR-IBBR UOS Naples, National Research Council of Italy, Institute of Biosciences and BioResources, Research Division Naples, Via P. Castellino 111, Naples, Italy
| | - Francesco La Cara
- />CNR-IBBR UOS Naples, National Research Council of Italy, Institute of Biosciences and BioResources, Research Division Naples, Via P. Castellino 111, Naples, Italy
- />CNR-IBAF UOS Napoli, National Research Council of Italy, Institute of Agro-environmental and Forest Biology, Research Division Naples, Via P. Castellino 111, Naples, Italy
| | - Nunzia Scotti
- />CNR-IBBR UOS Portici, National Research Council of Italy, Institute of Biosciences and BioResources, Research Division Portici, Via Università 133, 80055 Portici, NA Italy
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Alfano EF, Lentz EM, Bellido D, Dus Santos MJ, Goldbaum FA, Wigdorovitz A, Bravo-Almonacid FF. Expression of the Multimeric and Highly Immunogenic Brucella spp. Lumazine Synthase Fused to Bovine Rotavirus VP8d as a Scaffold for Antigen Production in Tobacco Chloroplasts. FRONTIERS IN PLANT SCIENCE 2015; 6:1170. [PMID: 26779198 PMCID: PMC4688359 DOI: 10.3389/fpls.2015.01170] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 12/07/2015] [Indexed: 06/05/2023]
Abstract
Lumazine synthase from Brucella spp. (BLS) is a highly immunogenic decameric protein which can accommodate foreign polypeptides or protein domains fused to its N-termini, markedly increasing their immunogenicity. The inner core domain (VP8d) of VP8 spike protein from bovine rotavirus is responsible for viral adhesion to sialic acid residues and infection. It also displays neutralizing epitopes, making it a good candidate for vaccination. In this work, the BLS scaffold was assessed for the first time in plants for recombinant vaccine development by N-terminally fusing BLS to VP8d and expressing the resulting fusion (BLSVP8d) in tobacco chloroplasts. Transplastomic plants were obtained and characterized by Southern, northern and western blot. BLSVP8d was highly expressed, representing 40% of total soluble protein (4.85 mg/g fresh tissue). BLSVP8d remained soluble and stable during all stages of plant development and even in lyophilized leaves stored at room temperature. Soluble protein extracts from fresh and lyophilized leaves were able to induce specific neutralizing IgY antibodies in a laying hen model. This work presents BLS as an interesting platform for highly immunogenic injectable, or even oral, subunit vaccines. Lyophilization of transplastomic leaves expressing stable antigenic fusions to BLS would further reduce costs and simplify downstream processing, purification and storage, allowing for more practical vaccines.
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Affiliation(s)
- E. Federico Alfano
- Laboratorio de Virología y Biotecnología Vegetal, INGEBI-CONICET Ciudad Autónoma deBuenos Aires, Argentina
| | - Ezequiel M. Lentz
- Laboratorio de Virología y Biotecnología Vegetal, INGEBI-CONICET Ciudad Autónoma deBuenos Aires, Argentina
| | - Demian Bellido
- Instituto de Virología, CICV y A, INTA CastelarBuenos Aires, Argentina
| | | | - Fernando A. Goldbaum
- Fundación Instituto Leloir e Instituto de Investigaciones Bioquímicas de Buenos Aires (IIBBA-CONICET) Ciudad Autónoma deBuenos Aires, Argentina
| | | | - Fernando F. Bravo-Almonacid
- Laboratorio de Virología y Biotecnología Vegetal, INGEBI-CONICET Ciudad Autónoma deBuenos Aires, Argentina
- Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, BernalBuenos Aires, Argentina
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12
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Protection against Foot-and-Mouth Disease Virus in Guinea Pigs via Oral Administration of Recombinant Lactobacillus plantarum Expressing VP1. PLoS One 2015; 10:e0143750. [PMID: 26629822 PMCID: PMC4667879 DOI: 10.1371/journal.pone.0143750] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 11/09/2015] [Indexed: 11/19/2022] Open
Abstract
Mucosal vaccination is an effective strategy for generating antigen-specific immune responses against mucosal infections of foot-and-mouth disease virus (FMDV). In this study, Lactobacillus plantarum strains NC8 and WCFS1 were used as oral delivery vehicles containing a pSIP411-VP1 recombinant plasmid to initiate mucosal and systemic immune responses in guinea pigs. Guinea pigs were orally vaccinated (three doses) with NC8-pSIP411, NC8-pSIP411-VP1, WCFS1-pSIP411, WCFS1-pSIP411-VP1 or milk. Animals immunized with NC8-pSIP411-VP1 and WCFS1-pSIP411-VP1 developed high levels of antigen-specific serum IgG, IgA, IgM, mucosal secretory IgA (sIgA) and neutralizing antibodies, and revealed stronger cell-mediated immune responses and enhanced protection against FMDV challenge compared with control groups. The recombinant pSIP411-VP1 effectively improved immunoprotection against FMDV in guinea pigs.
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Ruiz V, Mozgovoj MV, Dus Santos MJ, Wigdorovitz A. Plant-produced viral bovine vaccines: what happened during the last 10 years? PLANT BIOTECHNOLOGY JOURNAL 2015; 13:1071-1077. [PMID: 26250843 DOI: 10.1111/pbi.12440] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 06/05/2015] [Accepted: 06/27/2015] [Indexed: 06/04/2023]
Abstract
Vaccination has proved to be an efficient strategy to deal with viral infections in both human and animal species. However, protection of cattle against viral infections is still a major concern in veterinary science. During the last two decades, the development of efficient plant-based expression strategies for recombinant proteins prompted the application of this methodology for veterinary vaccine purposes. The main goals of viral bovine vaccines are to improve the health and welfare of cattle and increase the production of livestock, in a cost-effective manner. This review explores some of the more prominent recent advances in plant-made viral bovine vaccines against foot-and-mouth disease virus (FMDV), bovine rotavirus (BRV), bovine viral diarrhoea virus (BVDV), bluetongue virus (BTV) and bovine papillomavirus (BPV), some of which are considered to be the most important viral causative agents of economic loss in cattle production.
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Affiliation(s)
- Vanesa Ruiz
- Instituto de Virología, CICVyA, INTA, Hurlingham, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Marina V Mozgovoj
- Instituto de Virología, CICVyA, INTA, Hurlingham, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - María José Dus Santos
- Instituto de Virología, CICVyA, INTA, Hurlingham, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Andrés Wigdorovitz
- Instituto de Virología, CICVyA, INTA, Hurlingham, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
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Mucosal Vaccines from Plant Biotechnology. Mucosal Immunol 2015. [PMCID: PMC7158328 DOI: 10.1016/b978-0-12-415847-4.00065-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of plants for production of recombinant proteins has evolved over the past 25 years. The first plant-based vaccines were expressed in stably transgenic plants, with the idea to conveniently deliver “edible vaccines” by ingestion of the antigen-containing plant material. These systems provided a proof of concept that oral delivery of vaccines in crude plant material could stimulate antigen-specific serum and mucosal antibodies. Transgenic grains like rice in particular provide a stable and robust vehicle for antigen delivery. However, some issues exist with stably transgenic plants, including relatively low expression levels and regulatory issues. Thus, many recent studies use transient expression with plant viral vectors to achieve rapid high expression in Nicotiana benthamiana, followed by purification of antigen and intranasal delivery for effective stimulation of mucosal immune responses.
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15
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Morgenfeld M, Lentz E, Segretin ME, Alfano EF, Bravo-Almonacid F. Translational fusion and redirection to thylakoid lumen as strategies to enhance accumulation of human papillomavirus E7 antigen in tobacco chloroplasts. Mol Biotechnol 2014; 56:1021-31. [PMID: 24981330 DOI: 10.1007/s12033-014-9781-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Human papillomavirus (HPV) is the causal agent of cervical cancer, one of the most common causes of death in women worldwide, and its E7 antigen is the major candidate for a therapeutic vaccine. The large scale production of E7 by molecular farming that would lead to the development of a safe and inexpensive vaccine is impaired by its low accumulation level in the plant cell. To enhance antigen production in the plastids, two alternative strategies were carried out: the expression of E7 as a translational fusion to β-glucuronidase enzyme and redirection of E7 into the thylakoid lumen. The use of the β-glucuronidase as a partner protein turned out to be a successful strategy, antigen expression levels were enhanced between 30 and 40 times relative to unfused E7. Moreover, best accumulation, albeit at a high metabolic cost that compromised biomass production, was obtained redirecting E7 into the thylakoid lumen by the incorporation of the N-terminal transit peptide, Str. Following this approach lumenal E7 production exceeded the stromal by two orders of magnitude. Our results highlight the relevance of exploring different strategies to improve recombinant protein stability for certain transgenes in order to exploit potential advantages of recombinant protein accumulation in chloroplasts.
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Affiliation(s)
- Mauro Morgenfeld
- Instituto de Ingeniería Genética y Biología Molecular "Dr, Hector Torres" (INGEBI-CONICET), Vuelta de Obligado 2490, C.C 1428ADN, Ciudad Autónoma de Buenos Aires, Argentina
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16
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Zhang XH, Keating P, Wang XW, Huang YH, Martin J, Hartmann JX, Liu A. Production of functional native human interleukin-2 in tobacco chloroplasts. Mol Biotechnol 2014; 56:369-76. [PMID: 24146433 DOI: 10.1007/s12033-013-9717-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Interleukin-2 (IL-2) is an important T lymphocyte-derived cytokine in the mammalian immune system. Non-native, recombinant IL-2 derived from Escherichia coli is used widely in both medical research and treatment of diseases. Recombinant human IL-2 gene has been expressed in plant nuclear genomes, therefore it can be spread to the environment through pollen. Furthermore, all the plant-produced IL-2 reported thus far had been attached with artificial tags or fusion proteins, which may trigger unintended immunological responses and therefore compromise its full utility as a medicine. To expand the potential of using plant chloroplasts to produce functional native human therapeutic proteins, we inserted an engineered human interleukin-2 (hIL-2)-coding gene, without any tags, into the chloroplast genome of tobacco (Nicotiana tabacum L.). Partially purified hIL-2 protein from the leaves of the transplastomic plants induced in vitro proliferation of IL-2-dependent murine T lymphocytes. Our study demonstrates that plant chloroplasts can serve as a bio-factory for production of an active native human interleukin in a self-contained and therefore environmentally safe manner.
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Affiliation(s)
- Xing-Hai Zhang
- Department of Biological Sciences, Florida Atlantic University, 777 Glades Road, Boca Raton, FL, 33431, USA,
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17
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Ling HY, Pelosi A, Walmsley AM. Current status of plant-made vaccines for veterinary purposes. Expert Rev Vaccines 2014; 9:971-82. [DOI: 10.1586/erv.10.87] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Pillay P, Schlüter U, van Wyk S, Kunert KJ, Vorster BJ. Proteolysis of recombinant proteins in bioengineered plant cells. Bioengineered 2014; 5:15-20. [PMID: 23778319 PMCID: PMC4008460 DOI: 10.4161/bioe.25158] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 05/22/2013] [Accepted: 05/23/2013] [Indexed: 12/24/2022] Open
Abstract
Plants are increasingly used as alternative expression hosts for the production of recombinant proteins offering many advantages including higher biomass and the ability to perform post-translational modifications on complex proteins. Key challenges for optimized accumulation of recombinant proteins in a plant system still remain, including endogenous plant proteolytic activity, which may severely compromise recombinant protein stability. Several strategies have recently been applied to improve protein stability by limiting protease action such as recombinant protein production in various sub-cellular compartments or application of protease inhibitors to limit protease action. A short update on the current strategies applied is provided here, with particular focus on sub-cellular sites previously selected for recombinant protein production and the co-expression of protease inhibitors to limit protease activity.
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Affiliation(s)
- Priyen Pillay
- Department of Plant Science; Forestry and Agricultural Biotechnology Institute; University of Pretoria; Pretoria, South Africa
| | - Urte Schlüter
- Department of Plant Science; Forestry and Agricultural Biotechnology Institute; University of Pretoria; Pretoria, South Africa
| | - Stefan van Wyk
- Department of Plant Production and Soil Science; Forestry and Agricultural Biotechnology Institute; University of Pretoria; Pretoria, South Africa
| | - Karl Josef Kunert
- Department of Plant Science; Forestry and Agricultural Biotechnology Institute; University of Pretoria; Pretoria, South Africa
| | - Barend Juan Vorster
- Department of Plant Production and Soil Science; Forestry and Agricultural Biotechnology Institute; University of Pretoria; Pretoria, South Africa
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Wong CL, Sieo CC, Tan WS. Display of the VP1 epitope of foot-and-mouth disease virus on bacteriophage T7 and its application in diagnosis. J Virol Methods 2013; 193:611-9. [PMID: 23933075 DOI: 10.1016/j.jviromet.2013.07.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 07/17/2013] [Accepted: 07/20/2013] [Indexed: 11/29/2022]
Abstract
Foot-and-mouth disease (FMD) is a highly contagious epidemic disease threatening the cattle industry since the sixteenth century. In recent years, the development of diagnostic assays for FMD has benefited considerably from the advances of recombinant DNA technology. In this study, the immunodominant region of the capsid protein VP1 of the foot-and-mouth disease virus (FMDV) was fused to the T7 bacteriophage and expressed on the surface of the bacteriophage capsid protein. The recombinant protein of about 42 kDa was detected by the anti-T7 tag monoclonal antibody in Western blot analysis. Phage ELISA showed that both the vaccinated and positive infected bovine sera reacted significantly with the recombinant T7 particle. This study demonstrated the potential of the T7 phage displaying the VP1 epitope as a diagnostic reagent.
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Affiliation(s)
- Chuan Loo Wong
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
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20
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Hanson MR, Gray BN, Ahner BA. Chloroplast transformation for engineering of photosynthesis. JOURNAL OF EXPERIMENTAL BOTANY 2013; 64:731-42. [PMID: 23162121 DOI: 10.1093/jxb/ers325] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Many efforts are underway to engineer improvements in photosynthesis to meet the challenges of increasing demands for food and fuel in rapidly changing environmental conditions. Various transgenes have been introduced into either the nuclear or plastid genomes in attempts to increase photosynthetic efficiency. We examine the current knowledge of the critical features that affect levels of expression of plastid transgenes and protein accumulation in transplastomic plants, such as promoters, 5' and 3' untranslated regions, RNA-processing sites, translation signals and amino acid sequences that affect protein turnover. We review the prior attempts to manipulate the properties of ribulose-1,5-bisphosphate carboxylase oxygenase (Rubisco) through plastid transformation. We illustrate how plastid operons could be created for expression of the multiple genes needed to introduce new pathways or enzymes to enhance photosynthetic rates or reduce photorespiration. We describe here the past accomplishments and future prospects for manipulating plant enzymes and pathways to enhance carbon assimilation through plastid transformation.
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Affiliation(s)
- Maureen R Hanson
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA.
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21
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Ceccoli RD, Blanco NE, Segretin ME, Melzer M, Hanke GT, Scheibe R, Hajirezaei MR, Bravo-Almonacid FF, Carrillo N. Flavodoxin displays dose-dependent effects on photosynthesis and stress tolerance when expressed in transgenic tobacco plants. PLANTA 2012; 236:1447-58. [PMID: 22763502 DOI: 10.1007/s00425-012-1695-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Accepted: 06/16/2012] [Indexed: 05/18/2023]
Abstract
Ferredoxins are iron-sulfur proteins involved in various one-electron transfer pathways. Ferredoxin levels decrease under adverse environmental conditions in photosynthetic organisms. In cyanobacteria, this decline is compensated by induction of flavodoxin, an isofunctional flavoprotein. Flavodoxin is not present in higher plants, but transgenic Nicotiana tabacum lines accumulating Anabaena flavodoxin in plastids display increased tolerance to different sources of environmental stress. As the degree of tolerance correlated with flavodoxin dosage in plastids of nuclear-transformed transgenic tobacco, we prepared plants expressing even higher levels of flavodoxin by direct plastid transformation. A suite of nuclear- and chloroplast-transformed lines expressing a wide range of flavodoxin levels, from 0.3 to 10.8 μmol m(-2), did not exhibit any detectable growth phenotype relative to the wild type. In the absence of stress, the contents of both chlorophyll a and carotenoids, as well as the photosynthetic performance (photosystem II maximum efficiency, photosystem II operating efficiency, electron transport rates and carbon assimilation rates), displayed a moderate increase with flavodoxin concentrations up to 1.3-2.6 μmol flavodoxin m(-2), and then declined to wild-type levels. Stress tolerance, as estimated by the damage inflicted on exposure to the pro-oxidant methyl viologen, also exhibited a bell-shaped response, with a significant, dose-dependent increase in tolerance followed by a drop in the high-expressing lines. The results indicate that optimal photosynthetic performance and stress tolerance were observed at flavodoxin levels comparable to those of endogenous ferredoxin. Further increases in flavodoxin content become detrimental to plant fitness.
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Affiliation(s)
- Romina D Ceccoli
- División Biología Molecular, Facultad de Ciencias Bioquímicas y Farmacéuticas, Instituto de Biología Molecular y Celular de Rosario, Universidad Nacional de Rosario, Suipacha 531, S2002LRK, Rosario, Argentina
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22
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Lentz EM, Garaicoechea L, Alfano EF, Parreño V, Wigdorovitz A, Bravo-Almonacid FF. Translational fusion and redirection to thylakoid lumen as strategies to improve the accumulation of a camelid antibody fragment in transplastomic tobacco. PLANTA 2012; 236:703-14. [PMID: 22526499 DOI: 10.1007/s00425-012-1642-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Accepted: 03/28/2012] [Indexed: 05/03/2023]
Abstract
Fragments from camelid single-chain antibodies known as VHHs or nanobodies represent a valuable tool in diagnostics, investigation and passive immunity therapy. Here, we explored different strategies to improve the accumulation of a neutralizing VHH antibody against rotavirus in tobacco transplastomic plants. First, we attempted to express the VHH in the chloroplast stroma and then two alternative strategies were carried out to improve the expression levels: expression as a translational fusion to the β-glucuronidase enzyme (GUS-E-VHH), and redirection of the VHH into the thylakoid lumen (pep-VHH). Every attempt to produce transplastomic plants expressing the VHH in the stroma was futile. The transgene turned out to be unstable and the presence of the VHH protein was almost undetectable. Although pep-VHH plants also presented some of the aforementioned problems, higher accumulation of the nanobody was observed (2-3% of the total soluble proteins). The use of β-glucuronidase as a partner protein turned out to be a successful strategy and expression levels reached 3% of the total soluble proteins. The functionality of the VHHs produced by pep-VHH and GUS-E-VHH plants was studied and compared with that of the antibody produced in Escherichia coli. This work contributes to optimizing the expression of VHH in transplastomic plants. Recombinant proteins could be obtained either by accumulation in the thylakoid lumen or as a fusion protein with β-glucuronidase, and both strategies allow for further optimization.
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Affiliation(s)
- Ezequiel M Lentz
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular (INGEBI), CONICET, Vuelta de Obligado 2490, C1428ADN, Buenos Aires, Argentina
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Wang Y, Shen Q, Jiang Y, Song Y, Fang L, Xiao S, Chen H. Immunogenicity of foot-and-mouth disease virus structural polyprotein P1 expressed in transgenic rice. J Virol Methods 2012; 181:12-7. [DOI: 10.1016/j.jviromet.2012.01.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 12/23/2011] [Accepted: 01/09/2012] [Indexed: 11/25/2022]
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Segretin ME, Lentz EM, Wirth SA, Morgenfeld MM, Bravo-Almonacid FF. Transformation of Solanum tuberosum plastids allows high expression levels of β-glucuronidase both in leaves and microtubers developed in vitro. PLANTA 2012; 235:807-18. [PMID: 22071556 DOI: 10.1007/s00425-011-1541-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Accepted: 10/21/2011] [Indexed: 05/03/2023]
Abstract
Plastid genome transformation offers an attractive methodology for transgene expression in plants, but for potato, only expression of gfp transgene (besides the selective gene aadA) has been published. We report here successful expression of β-glucuronidase in transplastomic Solanum tuberosum (var. Desiree) plants, with accumulation levels for the recombinant protein of up to 41% of total soluble protein in mature leaves. To our knowledge, this is the highest expression level reported for a heterologous protein in S. tuberosum. Accumulation of the recombinant protein in soil-grown minitubers was very low, as described in previous reports. Interestingly, microtubers developed in vitro showed higher accumulation of β-glucuronidase. As light exposure during their development could be the trigger for this high accumulation, we analyzed the effect of light on β-glucuronidase accumulation in transplastomic tubers. Exposure to light for 8 days increased β-glucuronidase accumulation in soil-grown tubers, acting as a light-inducible expression system for recombinant protein accumulation in tuber plastids. In this paper we show that plastid transformation in potato allows the highest recombinant protein accumulation in foliar tissue described so far for this food crop. We also demonstrate that in tubers high accumulation is possible and depends on light exposure. Because tubers have many advantages as protein storage organs, these results could lead to new recombinant protein production schemes based on potato.
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Affiliation(s)
- María Eugenia Segretin
- Laboratorio de Biotecnología Vegetal, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular-INGEBI-CONICET, Vuelta de Obligado 2490, 2do. Piso, C1428ADN, Ciudad Autónoma de Buenos Aires, Argentina.
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Lico C, Santi L, Twyman RM, Pezzotti M, Avesani L. The use of plants for the production of therapeutic human peptides. PLANT CELL REPORTS 2012; 31:439-51. [PMID: 22218674 DOI: 10.1007/s00299-011-1215-7] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Revised: 12/13/2011] [Accepted: 12/13/2011] [Indexed: 05/17/2023]
Abstract
Peptides have unique properties that make them useful drug candidates for diverse indications, including allergy, infectious disease and cancer. Some peptides are intrinsically bioactive, while others can be used to induce precise immune responses by defining a minimal immunogenic region. The limitations of peptides, such as metabolic instability, short half-life and low immunogenicity, can be addressed by strategies such as multimerization or fusion to carriers, to improve their pharmacological properties. The remaining major drawback is the cost of production using conventional chemical synthesis, which is also difficult to scale-up. Over the last 15 years, plants have been shown to produce bioactive and immunogenic peptides economically and with the potential for large-scale synthesis. The production of peptides in plants is usually achieved by the genetic fusion of the corresponding nucleotide sequence to that of a carrier protein, followed by stable nuclear or plastid transformation or transient expression using bacterial or viral vectors. Chimeric plant viruses or virus-like particles can also be used to display peptide antigens, allowing the production of polyvalent vaccine candidates. Here we review progress in the field of plant-derived peptides over the last 5 years, addressing new challenges for diverse pathologies.
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Affiliation(s)
- Chiara Lico
- Laboratorio di Biotecnologie, Unità Tecnica BIORAD, ENEA CR Casaccia, 00123 Rome, Italy
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26
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Production of foreign proteins using plastid transformation. Biotechnol Adv 2012; 30:387-97. [DOI: 10.1016/j.biotechadv.2011.07.019] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 05/10/2011] [Accepted: 07/25/2011] [Indexed: 12/19/2022]
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27
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Pelosi A, Shepherd R, Walmsley AM. Delivery of plant-made vaccines and therapeutics. Biotechnol Adv 2012; 30:440-8. [DOI: 10.1016/j.biotechadv.2011.07.018] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 07/14/2011] [Accepted: 07/25/2011] [Indexed: 11/17/2022]
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28
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Lentz EM, Mozgovoj MV, Bellido D, Dus Santos MJ, Wigdorovitz A, Bravo-Almonacid FF. VP8* antigen produced in tobacco transplastomic plants confers protection against bovine rotavirus infection in a suckling mouse model. J Biotechnol 2011; 156:100-7. [PMID: 21893114 DOI: 10.1016/j.jbiotec.2011.08.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 07/26/2011] [Accepted: 08/14/2011] [Indexed: 10/17/2022]
Abstract
Group A rotavirus is a major leading cause of diarrhea in mammalian species worldwide. In Argentina, bovine rotavirus (BRV) is the main cause of neonatal diarrhea in calves. VP4, one of the outermost capsid proteins, is involved in various virus functions. Rotavirus infectivity requires proteolytic cleavage of VP4, giving an N-terminal non-glycosilated sialic acid-recognizing domain (VP8*), and a C-terminal fragment (VP5*) that remains associated with the virion. VP8* subunit is the major determinant of the viral infectivity and one of the neutralizing antigens. In this work, the C486 BRV VP8* protein was produced in tobacco chloroplasts. Transplastomic plants were obtained and characterized by Southern blot, northern blot and western blot. VP8* was highly stable in the transplastomic leaves, and formed insoluble aggregates that were partially solubilized by sonication. The recombinant protein yield was 600 μg/g of fresh tissue (FT). Both the soluble and insoluble fractions of the VP8* plant extracts were able to induce a strong immune response in female mice as measured by ELISA and virus neutralization test. Most important, suckling mice born to immunized dams were protected against oral challenge with virulent rotavirus. Results presented here contribute to demonstrate the feasibility of using antigens expressed in transplastomic plants for the development of subunit vaccines.
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Affiliation(s)
- E M Lentz
- Laboratorio de Virología y Biotecnología Vegetal, INGEBI-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
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29
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Sanz-Barrio R, Millán AFS, Corral-Martínez P, Seguí-Simarro JM, Farran I. Tobacco plastidial thioredoxins as modulators of recombinant protein production in transgenic chloroplasts. PLANT BIOTECHNOLOGY JOURNAL 2011; 9:639-50. [PMID: 21426478 DOI: 10.1111/j.1467-7652.2011.00608.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Thioredoxins (Trxs) are small ubiquitous disulphide proteins widely known to enhance expression and solubility of recombinant proteins in microbial expression systems. Given the common evolutionary heritage of chloroplasts and bacteria, we attempted to analyse whether plastid Trxs could also act as modulators of recombinant protein expression in transgenic chloroplasts. For that purpose, two tobacco Trxs (m and f) with different phylogenetic origins were assessed. Using plastid transformation, we assayed two strategies: the fusion and the co-expression of Trxs with human serum albumin (HSA), which was previously observed to form large protein bodies in tobacco chloroplasts. Our results indicate that both Trxs behave similarly as regards HSA accumulation, although they act differently when fused or co-expressed with HSA. Trxs-HSA fusions markedly increased the final yield of HSA (up to 26% of total protein) when compared with control lines that only expressed HSA; this increase was mainly caused by higher HSA stability of the fused proteins. However, the fusion strategy failed to prevent the formation of protein bodies within chloroplasts. On the other hand, the co-expression constructs gave rise to an absence of large protein bodies although no more soluble HSA was accumulated. In these plants, electron micrographs showed HSA and Trxs co-localization in small protein bodies with fibrillar texture, suggesting a possible influence of Trxs on HSA solubilization. Moreover, the in vitro chaperone activity of Trx m and f was demonstrated, which supports the hypothesis of a direct relationship between Trx presence and HSA aggregates solubilization in plants co-expressing both proteins.
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Affiliation(s)
- Ruth Sanz-Barrio
- Instituto de Agrobiotecnología (UPNA-CSIC-Gobierno de Navarra), Pamplona, Spain
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Obembe OO, Popoola JO, Leelavathi S, Reddy SV. Advances in plant molecular farming. Biotechnol Adv 2010; 29:210-22. [PMID: 21115109 DOI: 10.1016/j.biotechadv.2010.11.004] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 11/12/2010] [Accepted: 11/12/2010] [Indexed: 01/01/2023]
Abstract
Plant molecular farming (PMF) is a new branch of plant biotechnology, where plants are engineered to produce recombinant pharmaceutical and industrial proteins in large quantities. As an emerging subdivision of the biopharmaceutical industry, PMF is still trying to gain comparable social acceptance as the already established production systems that produce these high valued proteins in microbial, yeast, or mammalian expression systems. This article reviews the various cost-effective technologies and strategies, which are being developed to improve yield and quality of the plant-derived pharmaceuticals, thereby making plant-based production system suitable alternatives to the existing systems. It also attempts to overview the different novel plant-derived pharmaceuticals and non-pharmaceutical protein products that are at various stages of clinical development or commercialization. It then discusses the biosafety and regulatory issues, which are crucial (if strictly adhered to) to eliminating potential health and environmental risks, which in turn is necessary to earning favorable public perception, thus ensuring the success of the industry.
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Affiliation(s)
- Olawole O Obembe
- Department of Biological Sciences, Covenant University, PMB 1023 Ota, Ogun State, Nigeria.
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31
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Wani SH, Haider N, Kumar H, Singh N. Plant plastid engineering. Curr Genomics 2010; 11:500-12. [PMID: 21532834 PMCID: PMC3048312 DOI: 10.2174/138920210793175912] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2010] [Revised: 07/06/2010] [Accepted: 07/26/2010] [Indexed: 01/28/2023] Open
Abstract
Genetic material in plants is distributed into nucleus, plastids and mitochondria. Plastid has a central role of carrying out photosynthesis in plant cells. Plastid transformation is becoming more popular and an alternative to nuclear gene transformation because of various advantages like high protein levels, the feasibility of expressing multiple proteins from polycistronic mRNAs, and gene containment through the lack of pollen transmission. Recently, much progress in plastid engineering has been made. In addition to model plant tobacco, many transplastomic crop plants have been generated which possess higher resistance to biotic and abiotic stresses and molecular pharming. In this mini review, we will discuss the features of the plastid DNA and advantages of plastid transformation. We will also present some examples of transplastomic plants developed so far through plastid engineering, and the various applications of plastid transformation.
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Affiliation(s)
- Shabir H. Wani
- Biotechnology Laboratory, Central Institute of Temperate Horticulture, Rangreth, Srinagar, (J&K), 190 007, India
| | - Nadia Haider
- Department of Molecular Biology and Biotechnology, AECS, Damascus P. O. Box 6091, Syria
| | - Hitesh Kumar
- Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana 141 004, India
| | - N.B. Singh
- Department of Plant Breeding and Genetics, COA, Central Agricultural University, Imphal, Manipur, 795 004, India
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Cardi T, Lenzi P, Maliga P. Chloroplasts as expression platforms for plant-produced vaccines. Expert Rev Vaccines 2010; 9:893-911. [PMID: 20673012 DOI: 10.1586/erv.10.78] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
Production of recombinant subunit vaccines from genes incorporated in the plastid genome is advantageous because of the attainable expression level due to high transgene copy number and the absence of gene silencing; biocontainment as a consequence of maternal inheritance of plastids and no transgene presence in the pollen; and expression of multiple transgenes in prokaryotic-like operons. We discuss the core technology of plastid transformation in Chlamydomonas reinhardtii, a unicellular alga, and Nicotiana tabacum (tobacco), a flowering plant species, and demonstrate the utility of the technology for the production of recombinant vaccine antigens.
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Affiliation(s)
- Teodoro Cardi
- CNR-IGV, Institute of Plant Genetics, Portici, Italy.
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