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Kazaks A, Lu IN, Farinelle S, Ramirez A, Crescente V, Blaha B, Ogonah O, Mukhopadhyay T, de Obanos MP, Krimer A, Akopjana I, Bogans J, Ose V, Kirsteina A, Kazaka T, Stonehouse NJ, Rowlands DJ, Muller CP, Tars K, Rosenberg WM. Production and purification of chimeric HBc virus-like particles carrying influenza virus LAH domain as vaccine candidates. BMC Biotechnol 2017; 17:79. [PMID: 29126399 PMCID: PMC5681787 DOI: 10.1186/s12896-017-0396-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 10/31/2017] [Indexed: 02/06/2023] Open
Abstract
Background The lack of a universal influenza vaccine is a global health problem. Interest is now focused on structurally conserved protein domains capable of eliciting protection against a broad range of influenza virus strains. The long alpha helix (LAH) is an attractive vaccine component since it is one of the most conserved influenza hemagglutinin (HA) stalk regions. For an improved immune response, the LAH domain from H3N2 strain has been incorporated into virus-like particles (VLPs) derived from hepatitis B virus core protein (HBc) using recently developed tandem core technology. Results Fermentation conditions for recombinant HBc-LAH were established in yeast Pichia pastoris and a rapid and efficient purification method for chimeric VLPs was developed to match the requirements for industrial scale-up. Purified VLPs induced strong antibody responses against both group 1 and group 2 HA proteins in mice. Conclusion Our results indicate that the tandem core technology is a useful tool for incorporation of highly hydrophobic LAH domain into HBc VLPs. Chimeric VLPs can be successfully produced in bioreactor using yeast expression system. Immunologic data indicate that HBc VLPs carrying the LAH antigen represent a promising universal influenza vaccine component. Electronic supplementary material The online version of this article (10.1186/s12896-017-0396-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Andris Kazaks
- Latvian Biomedical Research and Study Centre, Ratsupites 1, Riga, LV-1067, Latvia.
| | - I-Na Lu
- Department of Infection and Immunity, Luxembourg Institute of Health, 29, rue Henri Koch, L-4354, Esch-sur-Alzette, Luxembourg
| | - Sophie Farinelle
- Department of Infection and Immunity, Luxembourg Institute of Health, 29, rue Henri Koch, L-4354, Esch-sur-Alzette, Luxembourg
| | - Alex Ramirez
- iQur Limited, 2 Royal College Street, London, NW1 0NH, UK
| | | | - Benjamin Blaha
- Department of Biochemical Engineering, University College London, Gower Street, London, WC1E 6BT, UK
| | - Olotu Ogonah
- Department of Biochemical Engineering, University College London, Gower Street, London, WC1E 6BT, UK
| | - Tarit Mukhopadhyay
- Department of Biochemical Engineering, University College London, Gower Street, London, WC1E 6BT, UK
| | - Mapi Perez de Obanos
- 3P Biopharmaceuticals SL, Calle Mocholi 2 Poligono Mocholi, Noain, 31110, Navarra, Spain
| | - Alejandro Krimer
- 3P Biopharmaceuticals SL, Calle Mocholi 2 Poligono Mocholi, Noain, 31110, Navarra, Spain
| | - Inara Akopjana
- Latvian Biomedical Research and Study Centre, Ratsupites 1, Riga, LV-1067, Latvia
| | - Janis Bogans
- Latvian Biomedical Research and Study Centre, Ratsupites 1, Riga, LV-1067, Latvia
| | - Velta Ose
- Latvian Biomedical Research and Study Centre, Ratsupites 1, Riga, LV-1067, Latvia
| | - Anna Kirsteina
- Latvian Biomedical Research and Study Centre, Ratsupites 1, Riga, LV-1067, Latvia
| | - Tatjana Kazaka
- Latvian Biomedical Research and Study Centre, Ratsupites 1, Riga, LV-1067, Latvia
| | | | - David J Rowlands
- Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - Claude P Muller
- Department of Infection and Immunity, Luxembourg Institute of Health, 29, rue Henri Koch, L-4354, Esch-sur-Alzette, Luxembourg
| | - Kaspars Tars
- Latvian Biomedical Research and Study Centre, Ratsupites 1, Riga, LV-1067, Latvia.,Faculty of Biology, Department of Molecular Biology, Jelgavas 1, Riga, LV-1004, Latvia
| | - William M Rosenberg
- iQur Limited, 2 Royal College Street, London, NW1 0NH, UK.,Institute for Liver and Digestive Health, Division of Medicine, University College London, Royal Free Campus, NW3 2PF, London, UK
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Eiras DF, Basabe J, Scodellaro CF, Banach DB, Matos ML, Krimer A, Baneth G. First molecular characterization of canine hepatozoonosis in Argentina: evaluation of asymptomatic Hepatozoon canis infection in dogs from Buenos Aires. Vet Parasitol 2007; 149:275-9. [PMID: 17720320 DOI: 10.1016/j.vetpar.2007.07.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2007] [Revised: 06/01/2007] [Accepted: 07/05/2007] [Indexed: 11/24/2022]
Abstract
Canine hepatozoonosis is an expanding tick-borne disease in Argentina. Hepatozoonosis was studied during 1 year in six dogs from the same household in Buenos Aires. Blood parasitemia with Hepatozoon gamonts was found in five dogs and all six were positive by PCR for Hepatozoon sp. Although the levels of parasitemia fluctuated during the year, no clinical signs of disease were detected during the follow up period. Amplification and sequencing of a 650 bases fragment of the 18S rRNA gene from all six dogs yielded fragments that were 99% identical to H. canis. The results of the partial 18S rRNA genotyping with the sub-clinical course of infection and lack of severe hematological abnormalities are compatible with clinical and molecular descriptions of Hepatozoon canis infection from other areas of the world. This is the first molecular characterization of Hepatozoon from Argentina.
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Furlong LI, Hellman U, Krimer A, Tezón JG, Charreau EH, Vazquez-Levin MH. Expression of human proacrosin in Escherichia coli and binding to zona pellucida. Biol Reprod 2000; 62:606-15. [PMID: 10684801 DOI: 10.1095/biolreprod62.3.606] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Proacrosin is a multifunctional protein present in the sperm acrosome. This study characterizes the expression of human proacrosin in bacteria and assesses zona pellucida binding activity. The cDNA encoding human proacrosin was subcloned in pGEX-3X and pET-22b vectors. In the pGEX system, expression of the full-length fusion protein was not detected. In the pET system, an expression product with an apparent molecular size similar to that expected for the proenzyme (Rec-40, 42-44 kDa) was recognized by a monoclonal antibody to human acrosin, AcrC5F10. A 32-34-kDa protein (Rec-30), not recognized by AcrC5F10 on Western blots, was the major expression product. Proteins of 21 (Rec-20) and 18 (Rec-10) kDa were recovered as insoluble expression products as were Rec-40 and Rec-30, and truncated products from the C terminus were detected in the soluble fraction. Rec-40 and Rec-30 coexisted at any culture time tested. Immune serum raised against Rec-30 (AntiRec-30) stained the acrosomal region of permeabilized human spermatozoa and recognized the recombinant proteins and proacrosin from human sperm extracts. Amino acid sequence analysis indicated that Rec-30, Rec-20, and Rec-10 are N-terminal fragments of proacrosin. The recombinant proteins Rec-40, -30, -20, and -10 were found to interact with homologous (125)I-zona pellucida glycoproteins.
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Affiliation(s)
- L I Furlong
- Instituto de Biología y Medicina Experimental-Consejo Nacional de Investigaciones Científicas y Técnicas, (1428) Buenos Aires, Argentina
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