1
|
Ramos-Duarte VA, Orlowski A, Jaquenod de Giusti C, Corigliano MG, Legarralde A, Mendoza-Morales LF, Atela A, Sánchez MA, Sander VA, Angel SO, Clemente M. Safe plant Hsp90 adjuvants elicit an effective immune response against SARS-CoV2-derived RBD antigen. Vaccine 2024; 42:3355-3364. [PMID: 38631949 DOI: 10.1016/j.vaccine.2024.04.036] [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: 01/08/2024] [Revised: 04/10/2024] [Accepted: 04/10/2024] [Indexed: 04/19/2024]
Abstract
To better understand the role of pHsp90 adjuvant in immune response modulation, we proposed the use of the Receptor Binding Domain (RBD) of the Spike protein of SARS-CoV2, the principal candidate in the design of subunit vaccines. We evaluated the humoral and cellular immune responses against RBD through the strategy "protein mixture" (Adjuvant + Antigen). The rRBD adjuvanted with rAtHsp81.2 group showed a higher increase of the anti-rRBD IgG1, while the rRBD adjuvanted with rNbHsp90.3 group showed a significant increase in anti-rRBD IgG2b/2a. These results were consistent with the cellular immune response analysis. Spleen cell cultures from rRBD + rNbHsp90.3-immunized mice showed significantly increased IFN-γ production. In contrast, spleen cell cultures from rRBD + rAtHsp81.2-immunized mice showed significantly increased IL-4 levels. Finally, vaccines adjuvanted with rNbHsp90.3 induced higher neutralizing antibody responses compared to those adjuvanted with rAtHsp81.2. To know whether both chaperones must form complexes to generate an effective immune response, we performed co-immunoprecipitation (co-IP) assays. The results indicated that the greater neutralizing capacity observed in the rRBD adjuvanted with rNbHsp90.3 group would be given by the rRBD-rNbHsp90.3 interaction rather than by the quality of the immune response triggered by the adjuvants. These results, together with our previous results, provide a comparative benchmark of these two novel and safe vaccine adjuvants for their capacity to stimulate immunity to a subunit vaccine, demonstrating the capacity of adjuvanted SARS-CoV2 subunit vaccines. Furthermore, these results revealed differences in the ability to modulate the immune response between these two pHsp90s, highlighting the importance of adjuvant selection for future rational vaccine and adjuvant design.
Collapse
MESH Headings
- Animals
- Female
- Humans
- Mice
- Adjuvants, Immunologic/administration & dosage
- Adjuvants, Vaccine
- Antibodies, Neutralizing/immunology
- Antibodies, Neutralizing/blood
- Antibodies, Viral/immunology
- Antibodies, Viral/blood
- COVID-19/prevention & control
- COVID-19/immunology
- COVID-19 Vaccines/immunology
- HSP90 Heat-Shock Proteins/immunology
- Immunity, Cellular
- Immunity, Humoral
- Immunoglobulin G/blood
- Immunoglobulin G/immunology
- Mice, Inbred BALB C
- SARS-CoV-2/immunology
- Spike Glycoprotein, Coronavirus/immunology
- Vaccines, Subunit/immunology
- Vaccines, Subunit/administration & dosage
Collapse
Affiliation(s)
- Victor A Ramos-Duarte
- Laboratorio de Molecular Farming y Vacunas-UB6, Instituto Tecnológico de Chascomús (CONICET-UNSAM), Av. Intendente Marino Km 8.2, Chascomús, Provincia de Buenos Aires 7030, Argentina; Escuela de Bio y Nanotecnologías, Campus Miguelete, 25 de Mayo y Francia, San Martín, Provincia de Buenos Aires 1650, Argentina
| | - Alejandro Orlowski
- Centro de Investigaciones Cardiovasculares "Dr. Horacio E. Cingolani" (CONICET), Universidad Nacional de La Plata, Facultad de Ciencias Médicas, La Plata, Argentina
| | - Carolina Jaquenod de Giusti
- Centro de Investigaciones Cardiovasculares "Dr. Horacio E. Cingolani" (CONICET), Universidad Nacional de La Plata, Facultad de Ciencias Médicas, La Plata, Argentina
| | - Mariana G Corigliano
- Laboratorio de Molecular Farming y Vacunas-UB6, Instituto Tecnológico de Chascomús (CONICET-UNSAM), Av. Intendente Marino Km 8.2, Chascomús, Provincia de Buenos Aires 7030, Argentina; Escuela de Bio y Nanotecnologías, Campus Miguelete, 25 de Mayo y Francia, San Martín, Provincia de Buenos Aires 1650, Argentina
| | - Ariel Legarralde
- Laboratorio de Molecular Farming y Vacunas-UB6, Instituto Tecnológico de Chascomús (CONICET-UNSAM), Av. Intendente Marino Km 8.2, Chascomús, Provincia de Buenos Aires 7030, Argentina; Escuela de Bio y Nanotecnologías, Campus Miguelete, 25 de Mayo y Francia, San Martín, Provincia de Buenos Aires 1650, Argentina
| | - Luisa F Mendoza-Morales
- Escuela de Bio y Nanotecnologías, Campus Miguelete, 25 de Mayo y Francia, San Martín, Provincia de Buenos Aires 1650, Argentina; Laboratorio de Biotecnologías en Bovinos y Ovinos, Instituto Tecnológico de Chascomús (CONICET-UNSAM), Av. Intendente Marino Km 8.2, Provincia de Buenos Aires, Argentina
| | - Agustín Atela
- Laboratorio de Molecular Farming y Vacunas-UB6, Instituto Tecnológico de Chascomús (CONICET-UNSAM), Av. Intendente Marino Km 8.2, Chascomús, Provincia de Buenos Aires 7030, Argentina; Escuela de Bio y Nanotecnologías, Campus Miguelete, 25 de Mayo y Francia, San Martín, Provincia de Buenos Aires 1650, Argentina
| | - Manuel A Sánchez
- Laboratorio de Molecular Farming y Vacunas-UB6, Instituto Tecnológico de Chascomús (CONICET-UNSAM), Av. Intendente Marino Km 8.2, Chascomús, Provincia de Buenos Aires 7030, Argentina; Escuela de Bio y Nanotecnologías, Campus Miguelete, 25 de Mayo y Francia, San Martín, Provincia de Buenos Aires 1650, Argentina
| | - Valeria A Sander
- Escuela de Bio y Nanotecnologías, Campus Miguelete, 25 de Mayo y Francia, San Martín, Provincia de Buenos Aires 1650, Argentina; Laboratorio de Biotecnologías en Bovinos y Ovinos, Instituto Tecnológico de Chascomús (CONICET-UNSAM), Av. Intendente Marino Km 8.2, Provincia de Buenos Aires, Argentina
| | - Sergio O Angel
- Escuela de Bio y Nanotecnologías, Campus Miguelete, 25 de Mayo y Francia, San Martín, Provincia de Buenos Aires 1650, Argentina; Laboratorio de Parasitología Molecular-UB2, Instituto Tecnológico de Chascomús (CONICET-UNSAM), Av. Intendente Marino Km 8.2, Chascomús, Provincia de Buenos Aires, Argentina
| | - Marina Clemente
- Laboratorio de Molecular Farming y Vacunas-UB6, Instituto Tecnológico de Chascomús (CONICET-UNSAM), Av. Intendente Marino Km 8.2, Chascomús, Provincia de Buenos Aires 7030, Argentina; Escuela de Bio y Nanotecnologías, Campus Miguelete, 25 de Mayo y Francia, San Martín, Provincia de Buenos Aires 1650, Argentina.
| |
Collapse
|
2
|
Sánchez-López EF, Corigliano MG, Oliferuk S, Ramos-Duarte VA, Rivera M, Mendoza-Morales LF, Angel SO, Sander VA, Clemente M. Oral Immunization With a Plant HSP90-SAG1 Fusion Protein Produced in Tobacco Elicits Strong Immune Responses and Reduces Cyst Number and Clinical Signs of Toxoplasmosis in Mice. FRONTIERS IN PLANT SCIENCE 2021; 12:726910. [PMID: 34675949 PMCID: PMC8525317 DOI: 10.3389/fpls.2021.726910] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 08/30/2021] [Indexed: 05/17/2023]
Abstract
Plant 90kDa heat shock protein (HSP90) is a potent adjuvant that increases both humoral and cellular immune responses to diverse proteins and peptides. In this study, we explored whether Arabidopsis thaliana HSP90 (AtHsp81.2) can improve the immune effects of a Toxoplasma gondii surface antigen 1 (SAG1). We designed two constructs containing the sequence of mature antigen (SAG1m), from aa77 to aa322, and B- and T-cell antigenic epitope-containing SAG1HC, from aa221 to aa319 fused to AtHsp81.2 sequence. When comparing the transient expression in Nicotiana tabacum X-27-8 leaves, which overexpress the suppressor helper component protease HC-Pro-tobacco etch virus (TEV), to that in N. benthamiana leaves, co-agroinfiltrated with the suppressor p19, optimal conditions included 6-week-old N. benthamiana plants, 7-day time to harvest, Agrobacterium tumefaciens cultures with an OD600nm of 0.6 for binary vectors and LED lights. While AtHsp81.2-SAG1m fusion protein was undetectable by Western blot in any of the evaluated conditions, AtHsp81.2-SAG1HC was expressed as intact fusion protein, yielding up to 90μg/g of fresh weight. Besides, the AtHsp81.2-SAG1HC mRNA was strongly expressed compared to the endogenous Nicotiana tabacum elongation factor-alpha (NtEFα) gene, whereas the AtHsp81.2-SAG1m mRNA was almost undetectable. Finally, mice were orally immunized with AtHsp81.2-SAG1HC-infiltrated fresh leaves (plAtHsp81.2-SAG1HC group), recombinant AtHsp81.2-SAG1HC purified from infiltrated leaves (rAtHsp81.2-SAG1HC group), non-infiltrated fresh leaves (control group), or phosphate-buffered saline (PBS group). Serum samples from plAtHsp81.2-SAG1HC-immunized mice had significantly higher levels of IgGt, IgG2a, and IgG2b anti-SAG1HC antibodies than serum from rAtHsp81.2-SAG1HC, control, and PBS groups. The number of cysts per brain in the plAtHsp81.2-SAG1HC-immunized mice was significantly reduced, and the parasite load in brain tissue was also lower in this group compared with the remaining groups. In an immunoblot assay, plant-expressed AtHsp81.2-SAG1HC was shown to react with antibodies present in sera from T. gondii-infected people. Therefore, the plant expression of a T. gondii antigen fused to the non-pathogenic adjuvant and carrier plant HSP90 as formulations against T. gondii can improve the vaccine efficacy, and plant extract can be directly used for vaccination without the need to purify the protein, making this platform a suitable and powerful biotechnological system for immunogenic antigen expression against toxoplasmosis.
Collapse
Affiliation(s)
- Edwin F. Sánchez-López
- Laboratorio de Molecular Farming y Vacunas, Instituto Tecnológico Chascomús (INTECH), Universidad Nacional de General San Martín (UNSAM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Chascomús, Argentina
| | - Mariana G. Corigliano
- Laboratorio de Molecular Farming y Vacunas, Instituto Tecnológico Chascomús (INTECH), Universidad Nacional de General San Martín (UNSAM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Chascomús, Argentina
| | - Sonia Oliferuk
- Laboratorio de Molecular Farming y Vacunas, Instituto Tecnológico Chascomús (INTECH), Universidad Nacional de General San Martín (UNSAM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Chascomús, Argentina
| | - Victor A. Ramos-Duarte
- Laboratorio de Molecular Farming y Vacunas, Instituto Tecnológico Chascomús (INTECH), Universidad Nacional de General San Martín (UNSAM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Chascomús, Argentina
| | - Maximiliano Rivera
- Laboratorio de Parasitología Molecular, Instituto Tecnológico Chascomús (INTECH), Universidad Nacional de General San Martín (UNSAM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Chascomús, Argentina
| | - Luisa F. Mendoza-Morales
- Laboratorio de Molecular Farming y Vacunas, Instituto Tecnológico Chascomús (INTECH), Universidad Nacional de General San Martín (UNSAM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Chascomús, Argentina
| | - Sergio O. Angel
- Laboratorio de Parasitología Molecular, Instituto Tecnológico Chascomús (INTECH), Universidad Nacional de General San Martín (UNSAM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Chascomús, Argentina
| | - Valeria A. Sander
- Laboratorio de Molecular Farming y Vacunas, Instituto Tecnológico Chascomús (INTECH), Universidad Nacional de General San Martín (UNSAM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Chascomús, Argentina
| | - Marina Clemente
- Laboratorio de Molecular Farming y Vacunas, Instituto Tecnológico Chascomús (INTECH), Universidad Nacional de General San Martín (UNSAM), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Chascomús, Argentina
| |
Collapse
|
3
|
Corigliano MG, Sander VA, Sánchez López EF, Ramos Duarte VA, Mendoza Morales LF, Angel SO, Clemente M. Heat Shock Proteins 90 kDa: Immunomodulators and Adjuvants in Vaccine Design Against Infectious Diseases. Front Bioeng Biotechnol 2021; 8:622186. [PMID: 33553125 PMCID: PMC7855457 DOI: 10.3389/fbioe.2020.622186] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 12/15/2020] [Indexed: 02/03/2023] Open
Abstract
Heat shock proteins 90 kDa (Hsp90s) were originally identified as stress-responsive proteins and described to participate in several homeostatic processes. Additionally, extracellular Hsp90s have the ability to bind to surface receptors and activate cellular functions related to immune response (cytokine secretion, cell maturation, and antigen presentation), making them very attractive to be studied as immunomodulators. In this context, Hsp90s are proposed as new adjuvants in the design of novel vaccine formulations that require the induction of a cell-mediated immune response to prevent infectious diseases. In this review, we summarized the adjuvant properties of Hsp90s when they are either alone, complexed, or fused to a peptide to add light to the knowledge of Hsp90s as carriers and adjuvants in the design of vaccines against infectious diseases. Besides, we also discuss the mechanisms by which Hsp90s activate and modulate professional antigen-presenting cells.
Collapse
Affiliation(s)
- Mariana G Corigliano
- Unidad Biotecnológica 6-UB6, Laboratorio de Molecular Farming y Vacunas, INTECH, UNSAM-CONICET, Chascomús, Argentina
| | - Valeria A Sander
- Unidad Biotecnológica 6-UB6, Laboratorio de Molecular Farming y Vacunas, INTECH, UNSAM-CONICET, Chascomús, Argentina
| | - Edwin F Sánchez López
- Unidad Biotecnológica 6-UB6, Laboratorio de Molecular Farming y Vacunas, INTECH, UNSAM-CONICET, Chascomús, Argentina
| | - Víctor A Ramos Duarte
- Unidad Biotecnológica 6-UB6, Laboratorio de Molecular Farming y Vacunas, INTECH, UNSAM-CONICET, Chascomús, Argentina
| | - Luisa F Mendoza Morales
- Unidad Biotecnológica 6-UB6, Laboratorio de Molecular Farming y Vacunas, INTECH, UNSAM-CONICET, Chascomús, Argentina
| | - Sergio O Angel
- Unidad Biotecnológica 2-UB2, Laboratorio de Parasitología Molecular, INTECH, UNSAM-CONICET, Chascomús, Argentina
| | - Marina Clemente
- Unidad Biotecnológica 6-UB6, Laboratorio de Molecular Farming y Vacunas, INTECH, UNSAM-CONICET, Chascomús, Argentina
| |
Collapse
|
4
|
Guo B, Xu P, Chai D, Cao L, Liu L, Song T, Hu S, Chen Y, Yan X, Xu T. gB co-immunization with GP96 enhances pulmonary-resident CD8 T cells and exerts a long-term defence against MCMV pneumonitis. J Cell Mol Med 2020; 24:14426-14440. [PMID: 33155438 PMCID: PMC7754068 DOI: 10.1111/jcmm.16065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 10/05/2020] [Accepted: 10/15/2020] [Indexed: 12/12/2022] Open
Abstract
Human cytomegalovirus (HCMV) infection in the respiratory tract leads to pneumonitis in immunocompromised hosts without available vaccine. Considering cytomegalovirus (CMV) mainly invades through the respiratory tract, CMV-specific pulmonary mucosal vaccine development that provides a long-lasting protection against CMV challenge gains our attention. In this study, N-terminal domain of GP96 (GP96-NT) was used as a mucosal adjuvant to enhance the induction of pulmonary-resident CD8 T cells elicited by MCMV glycoprotein B (gB) vaccine. Mice were intranasally co-immunized with 50 μg pgB and equal amount of pGP96-NT vaccine 4 times at 2-week intervals, and then i.n. challenged with MCMV at 16 weeks after the last immunization. Compared with pgB immunization alone, co-immunization with pgB/pGP96-NT enhanced a long-lasting protection against MCMV pneumonitis by significantly improved pneumonitis pathology, enhanced bodyweight, reduced viral burdens and increased survival rate. Moreover, the increased CD8 T cells were observed in lung but not spleen from pgB/pGP96-NT co-immunized mice. The increments of pulmonary CD8 T cells might be mainly due to non-circulating pulmonary-resident CD8 T-cell subset expansion but not circulating CD8 T-cell populations that home to inflammation site upon MCMV challenge. Finally, the deterioration of MCMV pneumonitis by depletion of pulmonary site-specific CD8 T cells in mice that were pgB/pGP96-NT co-immunization might be a clue to interpret the non-circulating pulmonary-resident CD8 T subset expansion. These data might uncover a promising long-lasting prophylactic vaccine strategy against MCMV-induced pneumonitis.
Collapse
Affiliation(s)
- Bingnan Guo
- Jiangsu Institute of Health Emergency, Xuzhou Medical University, Xuzhou, China.,Emergency Center, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Peifeng Xu
- Department of Respiratory Medicine, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Dafei Chai
- Cancer Institute, Xuzhou Medical University, Xuzhou, China
| | - Lei Cao
- Jiangsu Institute of Health Emergency, Xuzhou Medical University, Xuzhou, China.,Emergency Center, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Lin Liu
- Jiangsu Institute of Health Emergency, Xuzhou Medical University, Xuzhou, China.,Emergency Center, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Tengfei Song
- The Feinstein Institute for Medical Research, Manhasset, New York, NY, USA
| | - Shuqun Hu
- Jiangsu Institute of Health Emergency, Xuzhou Medical University, Xuzhou, China.,Emergency Center, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Yuling Chen
- Department of Respiratory Medicine, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Xianliang Yan
- Jiangsu Institute of Health Emergency, Xuzhou Medical University, Xuzhou, China.,Emergency Center, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Tie Xu
- Jiangsu Institute of Health Emergency, Xuzhou Medical University, Xuzhou, China.,Emergency Center, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China.,Department of Emergency, Nanjing Jiangning Hospital, Nanjing, China
| |
Collapse
|
5
|
Milani A, Basirnejad M, Bolhassani A. Heat-shock proteins in diagnosis and treatment: an overview of different biochemical and immunological functions. Immunotherapy 2020; 11:215-239. [PMID: 30730280 DOI: 10.2217/imt-2018-0105] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Heat-shock proteins (HSPs) have been involved in different functions including chaperone activity, protein folding, apoptosis, autophagy and immunity. The HSP families have powerful effects on the stimulation of innate immune responses through Toll-like receptors and scavenger receptors. Moreover, HSP-mediated phagocytosis directly enhances the processing and presentation of internalized antigens via the endocytic pathway in adaptive immune system. These properties of HSPs have been used for development of prophylactic and therapeutic vaccines against infectious and noninfectious diseases. Several studies also demonstrated the relationship between HSPs and drug resistance as well as their use as a novel biomarker for detecting tumors in patients. The present review describes different roles of HSPs in biology and medicine especially biochemical and immunological aspects.
Collapse
Affiliation(s)
- Alireza Milani
- Department of Hepatitis & AIDS, Pasteur Institute of Iran, Tehran, Iran.,Iranian Comprehensive Hemophilia Care Center, Tehran, Iran
| | | | - Azam Bolhassani
- Department of Hepatitis & AIDS, Pasteur Institute of Iran, Tehran, Iran
| |
Collapse
|
6
|
Different types of adjuvants in prophylactic and therapeutic human papillomavirus vaccines in laboratory animals: a systematic review. Arch Virol 2019; 165:263-284. [PMID: 31802228 DOI: 10.1007/s00705-019-04479-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 10/23/2019] [Indexed: 01/06/2023]
Abstract
Human papillomavirus (HPV) causes cervical carcinoma, which and is the third most common cancer, accounting for 275,000 deaths annually worldwide. Adjuvants have a key role in promotion of vaccine efficacy; therefore, using prophylactic and therapeutic vaccines combined with adjuvant could be of great benefit in prevention and treatment of cervical cancer. There are different types of adjuvants, including MF59TM adjuvants, RNA-based, JY (interleukin2/chitosan), cholera toxin (CT), heat-labile enterotoxin (LT), Freund's adjuvant, alum, SA-4-1BBL, λ-carrageenan (λ-CGN), heat shock proteins (HSPs), juzen-taiho-to (JTT) and hochu-ekki-to (HET), ISCOM and ISCOMATRIX™, very small size proteoliposomes (VSSPs), granulocyte macrophage colony-stimulating factor (GM-CSF), and Toll-like receptors (TLRs). Adjuvants have various functions, especially in therapeutic vaccines, and they lead to an increase in cytotoxic T lymphocytes (CTLs), so they are important in the design of vaccines. Here, we review the currently used adjuvants and their combinations with HPV protein vaccines in order to introduce an appropriate adjuvant for HPV vaccines.
Collapse
|
7
|
|
8
|
Sánchez-López EF, Corigliano MG, Albarracín RM, Sander VA, Legarralde A, Bengoa-Luoni SA, Clemente M. Plant Hsp90 is a novel adjuvant that elicits a strong humoral and cellular immune response against B- and T-cell epitopes of a Toxoplasma gondii SAG1 peptide. Parasit Vectors 2019; 12:140. [PMID: 30909938 PMCID: PMC6434815 DOI: 10.1186/s13071-019-3362-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Accepted: 02/26/2019] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND The 90-kDa heat-shock protein (Hsp90) from Nicotiana benthamiana (NbHsp90.3) is a promising adjuvant, especially for those vaccines that require a T cell-mediated immune response. Toxoplasma gondii SAG1 is considered one of the most important antigens for the development of effective subunit vaccines. Some epitopes located in the SAG1 C-terminus region have showed a strong humoral and cellular immune response. In the present study, we aimed to assess the efficacy of NbHsp90.3 as carrier/adjuvant of SAG1-derived peptide (SAG1HC) in a T. gondii infection murine model. METHODS In the present study, C57BL/6 mice were intraperitoneal immunized with the NbHsp90.3-SAG1HC fusion protein (NbHsp90.3-SAG1HC group), mature SAG1 (SAG1m group), NbHsp90.3 (NbHsp90.3 group) or PBS buffer 1× (PBS group). The levels of IgG antibodies and the cytokine profile were determined by ELISA. Two weeks after the last immunization, all mice were orally challenged with 20 cysts of T. gondii Me49 strain and the number of brain cysts was determined. In addition, both humoral and cellular immune responses were also evaluated during the acute and chronic phase of T. gondii infection by ELISA. RESULTS The characterization of the immune response generated after vaccination with NbHsp90.3 as an adjuvant showed that NbHsp90.3-SAG1HC-immunized mice produced antibodies that were able to recognize not only rSAG1m but also the native SAG1 present in the total lysate antigen extract (SAG1TLA) from T. gondii tachyzoites, while control groups did not. Furthermore, anti-rSAG1m IgG2a/2b antibodies were significantly induced. In addition, only the spleen cell cultures from NbHsp90.3-SAG1HC-immunized mice showed a significantly increased production of IFN-γ. During the chronic phase of T. gondii infection, the antibodies generated by the infection were unable to detect the recombinant protein, but they did react with TLA extract. In addition, splenocytes from all groups showed a high production of IFN-γ when stimulated with rGRA4, but only those from NbHsp90.3-SAG1HC group stimulated with rSAG1m showed high production of IFN-γ. Finally, NbHsp90.3-SAG1HC-immunized mice exhibited a significant reduction in the cyst load (56%) against T. gondii infection. CONCLUSIONS We demonstrated that NbHsp90.3 enhances the humoral and cell-mediated immune response through a Th1 type cytokine production. Mice vaccinated with NbHsp90.3-SAG1HC exhibited a partial protection against T. gondii infection and it was correlated with the induction of memory immune response. We developed and validated a vaccine formulation which, to our knowledge, for the first time includes the NbHsp90.3 protein covalently fused to a peptide from T. gondii SAG1 protein that contains T- and B-cell epitopes.
Collapse
Affiliation(s)
- Edwin F. Sánchez-López
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| | - Mariana G. Corigliano
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| | - Romina M. Albarracín
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| | - Valeria A. Sander
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| | - Ariel Legarralde
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| | - Sofía A. Bengoa-Luoni
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| | - Marina Clemente
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| |
Collapse
|
9
|
Sander VA, Corigliano MG, Clemente M. Promising Plant-Derived Adjuvants in the Development of Coccidial Vaccines. Front Vet Sci 2019; 6:20. [PMID: 30809529 PMCID: PMC6379251 DOI: 10.3389/fvets.2019.00020] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 01/18/2019] [Indexed: 01/15/2023] Open
Abstract
Coccidial parasites cause medical and veterinary diseases worldwide, frequently leading to severe illness and important economic losses. At present, drugs, chemotherapeutics and prophylactic vaccines are still missing for most of the coccidial infections. Moreover, the development and administration of drugs and chemotherapeutics against these diseases would not be adequate in livestock, since they may generate unacceptable residues in milk and meat that would avoid their commercialization. In this scenario, prophylactic vaccines emerge as the most suitable approach. Subunit vaccines have proven to be biologically safe and economically viable, allowing researchers to choose among the best antigens against each pathogen. However, they are generally poorly immunogenic and require the addition of adjuvant compounds to the vaccine formulation. During the last decades, research involving plant immunomodulatory compounds has become an important field of study based on their potential pharmaceutical applications. Some plant molecules such as saponins, polysaccharides, lectins and heat shock proteins are being explored as candidates for adjuvant/carriers formulations. Moreover, plant-derived immune stimulatory compounds open the possibility to attain the main goal in adjuvant research: a safe and non-toxic adjuvant capable of strongly boosting and directing immune responses that could be incorporated into different vaccine formulations, including mucosal vaccines. Here, we review the immunomodulatory properties of several plant molecules and discuss their application and future perspective as adjuvants in the development of vaccines against coccidial infections.
Collapse
Affiliation(s)
- Valeria A Sander
- Unidad de Biotecnología 6-UB6, Instituto Tecnológico Chascomús (INTECh), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Universidad Nacional de General San Martín (UNSAM), Chascomús, Argentina
| | - Mariana G Corigliano
- Unidad de Biotecnología 6-UB6, Instituto Tecnológico Chascomús (INTECh), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Universidad Nacional de General San Martín (UNSAM), Chascomús, Argentina
| | - Marina Clemente
- Unidad de Biotecnología 6-UB6, Instituto Tecnológico Chascomús (INTECh), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Universidad Nacional de General San Martín (UNSAM), Chascomús, Argentina
| |
Collapse
|
10
|
Kadkhodayan S, Jafarzade BS, Sadat SM, Motevalli F, Agi E, Bolhassani A. Combination of cell penetrating peptides and heterologous DNA prime/protein boost strategy enhances immune responses against HIV-1 Nef antigen in BALB/c mouse model. Immunol Lett 2017; 188:38-45. [DOI: 10.1016/j.imlet.2017.06.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/26/2017] [Accepted: 06/05/2017] [Indexed: 11/30/2022]
|
11
|
Zhu X, Liu J, Bai J, Liu P, Zhang T, Jiang P, Wang X. Baculovirus expression of the N-terminus of porcine heat shock protein Gp96 improves the immunogenicity of recombinant PCV2 capsid protein. J Virol Methods 2016; 230:36-44. [PMID: 26826323 DOI: 10.1016/j.jviromet.2016.01.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Revised: 01/23/2016] [Accepted: 01/24/2016] [Indexed: 01/05/2023]
Abstract
Porcine circovirus type 2 (PCV2) causes significant economic losses to the swine industry worldwide. Heat shock proteins (Hsps) can be used as modulators to enhance both innate and adaptive immune responses. In the present study, recombinant baculoviruses expressing the PCV2Cap protein and the N-terminal 22-370 amino acids of porcine Gp96 (Gp96N), Hsp90, and Hsp70 (rBac-cap/Gp96N, rBac-cap/Hsp90 and rBac-cap/Hsp70, respectively) were constructed and the immune responses were examined in mice and piglets. The mouse experiments showed that rBac-cap/Gp96N increased the titers of specific anti-PCV2 neutralizing antibodies, proliferative responses of peripheral blood mononuclear cells (PBMCs) and IFN-γ levels compared to rBac-cap/Hsp90, rBac-cap/Hsp70, or rBac-cap. The pig experiments showed that the levels of anti-PCV2 antibody, proliferative responses of PBMCs, and IFN-γ in the rBac-cap/Gp96N groups were increased compared to those in rBac-cap group. There were no clear clinical signs of infection following PCV2 challenge in pigs inoculated with recombinant rBac-cap/Gp96N and rBac-cap, and the relative daily weight gains were higher than those in the challenge control (CC) group. The pathological lesions, extent of viremia, and viral loads of the vaccinated groups were milder than those in the CC group. Meanwhile, the extent of viremia and viral load present in the rBac-cap/Gp96N group were significantly lower than those in the rBac-cap group. These results indicated that porcine Gp96N effectively increased the humoral and cell-mediated immune responses of PCV2Cap. Gp96N presents an attractive adjuvant or immunotargeting strategy to enhance the protective efficacy of PCV2 subunit vaccines in swine.
Collapse
Affiliation(s)
- Xuejiao Zhu
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Jie Liu
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Juan Bai
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Panrao Liu
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Tingjie Zhang
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Ping Jiang
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, China.
| | - Xianwei Wang
- Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China.
| |
Collapse
|
12
|
Pishraft-Sabet L, Kosinska AD, Rafati S, Bolhassani A, Taheri T, Memarnejadian A, Alavian SM, Roggendorf M, Samimi-Rad K. Enhancement of HCV polytope DNA vaccine efficacy by fusion to an N-terminal fragment of heat shock protein gp96. Arch Virol 2014; 160:141-52. [PMID: 25348271 DOI: 10.1007/s00705-014-2243-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 09/23/2014] [Indexed: 12/30/2022]
Abstract
Induction of a strong hepatitis C virus (HCV)-specific immune response plays a key role in control and clearance of the virus. A polytope (PT) DNA vaccine containing B- and T-cell epitopes could be a promising vaccination strategy against HCV, but its efficacy needs to be improved. The N-terminal domain of heat shock protein gp96 (NT(gp96)) has been shown to be a potent adjuvant for enhancing immunity. We constructed a PT DNA vaccine encoding four HCV immunodominant cytotoxic T lymphocyte epitopes (two HLA-A2- and two H2-D(d)-specific motifs) from the Core, E2, NS3 and NS5B antigens in addition to a T-helper CD4+ epitope from NS3 and a B-cell epitope from E2. The NT(gp96) was fused to the C- or N-terminal end of the PT DNA (PT-NT(gp96) or NT(gp96)-PT), and their potency was compared. Cellular and humoral immune responses against the expressed peptides were evaluated in CB6F1 mice. Our results showed that immunization of mice with PT DNA vaccine fused to NT(gp96) induced significantly stronger T-cell and antibody responses than PT DNA alone. Furthermore, the adjuvant activity of NT(gp96) was more efficient in the induction of immune responses when fused to the C-terminal end of the HCV DNA polytope. In conclusion, the NT(gp96) improved the efficacy of the DNA vaccine, and this immunomodulatory effect was dependent on the position of the fusion.
Collapse
Affiliation(s)
- Leila Pishraft-Sabet
- Department of Virology, School of Public Health, Tehran University of Medical Sciences, P.O.Box 6446, Tehran, 14155, Islamic Republic of Iran
| | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Strbo N, Garcia-Soto A, Schreiber TH, Podack ER. Secreted heat shock protein gp96-Ig: next-generation vaccines for cancer and infectious diseases. Immunol Res 2014; 57:311-25. [PMID: 24254084 DOI: 10.1007/s12026-013-8468-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Over the past decade, our laboratory has developed a secreted heat shock protein (HSP), chaperone gp96, cell-based vaccine that generates effective anti-tumor and anti-infectious immunity in vivo. Gp96-peptide complexes were identified as an extremely efficient stimulator of MHC I-mediated antigen cross-presentation, generating CD8 cytotoxic T-lymphocyte responses detectable in blood, spleen, gut and reproductive tract to femto-molar concentrations of antigen. These studies provided the first evidence that cell-based gp96-Ig-secreting vaccines may serve as a potent modality to induce both systemic and mucosal immunity. This approach takes advantage of the combined adjuvant and antigen delivery capacity of gp96 for the generation of cytotoxic immunity against a wide range of antigens in both anti-vial and anti-cancer vaccination. Here, we review the vaccine design that utilizes the unique property/ability of endoplasmic HSP gp96 to bind antigenic peptides and deliver them to antigen-presenting cells.
Collapse
Affiliation(s)
- Natasa Strbo
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, RMSB 3008, 1600 NW 10th Ave, Miami, FL, 33136, USA,
| | | | | | | |
Collapse
|
14
|
Corigliano MG, Fenoy I, Sander V, Maglioco A, Goldman A, Clemente M. Plant heat shock protein 90 as carrier-adjuvant for immunization against a reporter antigen. Vaccine 2013; 31:5872-8. [PMID: 24120680 DOI: 10.1016/j.vaccine.2013.09.047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 08/31/2013] [Accepted: 09/23/2013] [Indexed: 02/04/2023]
Abstract
Here, we evaluated the modulation of the immune response induced by Hsp90 of Nicotiana benthamiana (NbHsp90.3) against the Maltose Binding Protein (MBP) as a reporter antigen. Equimolar quantities of recombinant proteins were administered in mice as follows: MBP alone (MBP group), a mixture of MBP and rNbHsp90.3 (MBP+rNbHsp90.3 group) and the fusion of MBP to rNbHsp90.3 (MBP-rNbHsp90.3 group). The covalent linkage between NbHsp90.3 and MBP to bring a fusion protein was essential to induce the strong specific antibody response with predominance of IgG2a. Eighty-four days after the first immunization, splenocyte proliferation from MBP-rNbHsp90.3-immunized mice was consistently higher than that from MBP and MBP+rNbHsp90.3 groups. In addition, splenocytes from MBP-rNbHsp90.3 immunized mice produced higher levels of IFN-γ than controls. Finally, both formulations with rNbHsp90.3 significantly enhanced the MHC class I expression levels, but only rNbHsp90.3 covalent bound to MBP induced a specific cellular immune response against MBP measured as increased percentage of CD8(+) T cells. Taken together, these results suggest that plant HSP90s could be incorporated as adjuvants in vaccines that require the generation of a Th1 response along with a CD8 cytotoxic cell response to confer immunity.
Collapse
Affiliation(s)
- Mariana G Corigliano
- Laboratorio de Biotecnología Vegetal, IIB-INTECH, CONICET-UNSAM, Chascomús, Provincia de Buenos Aires, Argentina
| | | | | | | | | | | |
Collapse
|
15
|
Hajizadeh MR, Mokarram P, Kamali sarvestani E, Bolhassani A, Mostafavi Pour Z. Recombinant Nonstructural 3 Protein, rNS3, of Hepatitis C Virus Along With Recombinant GP96 Induce IL-12, TNFα and α5integrin Expression in Antigen Presenting Cells. HEPATITIS MONTHLY 2013; 13:e8104. [PMID: 24032046 PMCID: PMC3768236 DOI: 10.5812/hepatmon.8104] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Revised: 01/06/2013] [Accepted: 03/10/2013] [Indexed: 12/11/2022]
Abstract
BACKGROUND Hepatitis C virus (HCV) infection is the main cause of chronic liver disease and to date there has been no vaccine development to prevent this infection. Among non-structural HCV proteins, NS3 protein is an excellent goal for a therapeutic vaccine, due to its large size and less variation in conserved regions. The immunogenic properties of heat shock proteins (HSPs) for instance GP96 have prompted investigations into their function as strong adjuvant to improve innate and adaptive immunity. OBJECTIVES The aim of this study was to examine additive effects of recombinant GP96 (rGP96) fragments accompanied by rNS3 on expression levels of α5integrin and pro-inflammatory cytokines, IL-12 and TNFα, in Antigen Presenting Cells (APCs). MATERIALS AND METHODS Recombinant viral proteins (rNS3 and rRGD-NS3), N-terminal and C-terminal fragments of GP96 were produced and purified from E. coli in order to treat the cells; mouse spleen Dendritic Cells (DCs) and THP-1 macrophages. RESULTS Our results showed that rNT-GP96 alone significantly increases the expression level of IL-12, TNFα and α5integrin in THP-1 macrophages and DCs, while IL-12 and TNFα expression levels were unaffected by either rNS3 or rRGD-NS3. Interestingly, the co-addition of these recombinant proteins with rNT-GP96 increased IL-12, TNFα and α5integrin expression. Pearson Correlation showed a direct association between α5integrin with IL-12 and TNF-α expression. CONCLUSIONS we have highlighted the role of rNS3 plus rNT-GP96 mediated by α5integrin in producing IL-12 and TNFα. It can be suggested that rNT-GP96 could enhance immunity characteristic of rNS3 protein via production of pro-inflammatory cytokines.
Collapse
Affiliation(s)
- Mohammad Reza Hajizadeh
- Recombinant Proteins Lab, Biochemistry Department, Medical School, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Pooneh Mokarram
- Recombinant Proteins Lab, Biochemistry Department, Medical School, Shiraz University of Medical Sciences, Shiraz, IR Iran
- Gastroentrohepatology Research Center, Medical School, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | | | - Azam Bolhassani
- Molecular Immunology and Vaccine Research Laboratory, Pasteur Institute of Iran, Tehran, IR Iran
| | - Zohreh Mostafavi Pour
- Recombinant Proteins Lab, Biochemistry Department, Medical School, Shiraz University of Medical Sciences, Shiraz, IR Iran
- Faculty for Advanced Biomedical Sciences, Shiraz University of Medical Sciences, Shiraz, IR Iran
- Corresponding author: Zohreh Mostafavi Pour, Recombinant Proteins Lab, Biochemistry Department, Faculty for Advanced Biomedical Sciences, Shiraz University of Medical Sciences, P.O. Box: 71345-1167. Shiraz, IR Iran. Tel: +98-7112303029, Fax: +98-7112303029, E-mail:
| |
Collapse
|
16
|
Immunomodulatory effects of IP-10 chemokine along with PEI600-Tat delivery system in DNA vaccination against HPV infections. Mol Immunol 2013; 53:149-60. [DOI: 10.1016/j.molimm.2012.07.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2012] [Revised: 07/18/2012] [Accepted: 07/26/2012] [Indexed: 12/23/2022]
|
17
|
Bolhassani A, Rafati S. Mini-chaperones: potential immuno-stimulators in vaccine design. Hum Vaccin Immunother 2013; 9:153-61. [PMID: 23108356 PMCID: PMC3667931 DOI: 10.4161/hv.22248] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 09/08/2012] [Accepted: 09/16/2012] [Indexed: 12/21/2022] Open
Abstract
The immunogenic properties of heat shock proteins (HSPs) have prompted investigations into their application as immuno-modulatory agents. HSPs have been used as potent adjuvants in immunotherapy of cancer and infectious diseases. Some studies showed that immune activities reside within N- or C-terminal fragments of HSPs. These small fragments are sufficient to link peptides, to bind and be taken up by the receptors CD91 and scavenger receptor type A on antigen presenting cells (APCs). Thus, these mini-chaperones can be used in immunotherapy of tumors and vaccine development. The data clearly demonstrated the potential of using HSP fragments as a possible adjuvant to augment CTL response against infectious diseases. Some HSP domains have been shown to inhibit endothelial cell growth, angiogenesis or tumor growth. In this review, we describe the immuno-stimulatory activities of various mini-chaperones in development of different vaccine strategies (DNA-based vaccine and protein/peptide-based vaccines).
Collapse
Affiliation(s)
- Azam Bolhassani
- Molecular Immunology and Vaccine Research Lab., Pasteur Institute of Iran, Tehran, Iran. azam_bolhassani@yahoo
| | | |
Collapse
|
18
|
Salehi M, Taheri T, Mohit E, Zahedifard F, Seyed N, Taslimi Y, Sattari M, Bolhassani A, Rafati S. Recombinant Leishmania tarentolae encoding the HPV type 16 E7 gene in tumor mice model. Immunotherapy 2012. [DOI: 10.2217/imt.12.110] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Background: Cervical cancer, the third most prevalent cause of cancer in women worldwide, is associated with HPVs. The critical role of E7 protein in HPV-related malignancies has designated it as a strong contender for generating vaccines against HPV. Materials & methods: In this study, we developed a novel live vaccine using recombinant Leishmania tarentolae expressing E7-green fluorescent protein (GFP) fusion protein for the protection of mice against HPV-associated tumors. In order to transfect L. tarentolae with E7-GFP fusion construct, pLEXSY-neo2 system was applied. Followed by PCR, fluorescence imaging and fluorescence-activated cell sorting analysis, integration of E7-GFP gene into parasites genome was confirmed. A comparative study of six groups of C57BL/6 mice was performed to analyze antigen-specific humoral and cellular immune responses against E7 encoding live and DNA vaccines. Furthermore, the anti-tumor protective effect of L. tarentolae-E7-GFP was compared to other vaccination strategies, namely pcDNA-E7 as the DNA vaccine and pcDNA-E7/L. tarentolae-E7-GFP as the prime-boost regimen. Results: We found that E7-GFP expressing recombinant L. tarentolae induces significant levels of IgG2a and IFN-γ, while there is no significant IL-5 production compared with that of other strategies and control groups before and after challenge with TC-1 tumor cells. It is noteworthy that the designed live vaccine showed the best protection and minimum tumor size among all groups against TC-1-induced tumors. Conclusion: Overall, the results obtained revealed that the E7-GFP recombinant L. tarentolae could be a potential live vaccine for induction of immune responses in vivo.
Collapse
Affiliation(s)
- Maryam Salehi
- Molecular Immunology & Vaccine Research Laboratory, Pasteur Institute of Iran, Tehran, Iran
- Department of Immunology, Medical School, Shahid Beheshti University of Medical Sciences & Health Services, Tehran, Iran
| | - Tahereh Taheri
- Molecular Immunology & Vaccine Research Laboratory, Pasteur Institute of Iran, Tehran, Iran
| | - Elham Mohit
- Molecular Immunology & Vaccine Research Laboratory, Pasteur Institute of Iran, Tehran, Iran
| | - Farnaz Zahedifard
- Molecular Immunology & Vaccine Research Laboratory, Pasteur Institute of Iran, Tehran, Iran
| | - Negar Seyed
- Molecular Immunology & Vaccine Research Laboratory, Pasteur Institute of Iran, Tehran, Iran
| | - Yasaman Taslimi
- Molecular Immunology & Vaccine Research Laboratory, Pasteur Institute of Iran, Tehran, Iran
| | - Mandana Sattari
- Department of Immunology, Medical School, Shahid Beheshti University of Medical Sciences & Health Services, Tehran, Iran
| | - Azam Bolhassani
- Molecular Immunology & Vaccine Research Laboratory, Pasteur Institute of Iran, Tehran, Iran
| | - Sima Rafati
- Molecular Immunology & Vaccine Research Laboratory, Pasteur Institute of Iran, Tehran, Iran
| |
Collapse
|
19
|
Current World Literature. Curr Opin Allergy Clin Immunol 2012; 12:440-5. [DOI: 10.1097/aci.0b013e328356708d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|