Ghadir A Jamal, Ehsan Jahangirian, Hossein Tarrahimofrad
{"title":"针对 SARS-COV-2 设计的多表位疫苗的表达、纯化和抗体反应评估以及抗体-免疫原复合物模拟。","authors":"Ghadir A Jamal, Ehsan Jahangirian, Hossein Tarrahimofrad","doi":"10.2174/0109298665320319240809095727","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>The spread of the COVID-19 disease is the result of an infection caused by the SARS-CoV2 virus. Four crucial proteins, spike [S], membrane [M], nucleocapsid [N], and envelope [E] in coronaviruses have been considered to a large extent.</p><p><strong>Objective: </strong>This research aimed to express the recombinant protein of a multiepitope immunogen construct and evaluate the immunogenicity of the multiepitope vaccine that was previously designed as a candidate immunogenic against SARS-Cov-2.</p><p><strong>Materials and methods: </strong>Plasmid pET26b was transferred to the expression host E. coli BL21 [DE3] and the recombinant protein was expressed with IPTG induction. The recombinant protein was purified by Ni-NTA column affinity chromatography, and western blotting was used to confirm it. Finally, mice were immunized with recombinant protein in three doses. Then, the interaction of the 3D structure of the vaccine with the human neutralizing antibodies3D structures [7BWJ and 7K8N] antibody was evaluated by docking and molecular dynamics simulation.</p><p><strong>Results: </strong>The optimized gene had a codon compatibility index of 0.96. The expression of the recombinant protein of the SARS-Cov-2 vaccine in an E. coli host led to the production of the recombinant protein with a weight of about 70 kDa with a concentration of 0.7 mg/ml. Immunization of mice with recombinant protein of SARS-Cov-2 vaccine-induced IgG serum antibody response. Statistical analysis showed that the antibody titer in comparison with the control sample has a significant difference, and the antibody titer was acceptable up to 1/256000 dilution. The simulation of vaccine binding with human antibodies by molecular dynamics showed that Root Mean Square Deviation [RMSD], Root Mean Square Fluctuation [RMSF], Radius of Gyration, and H-bond as well as van der Waals energies and electrostatic of Molecular mechanics Poisson- Boltzmann surface area [MM/PBSA] analysis have stable interaction.</p><p><strong>Conclusion: </strong>This recombinant protein can probably be used as an immunogen candidate for the development of vaccines against SARS-CoV2 in future research.</p>","PeriodicalId":20736,"journal":{"name":"Protein and Peptide Letters","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Expression, Purification, and Evaluation of Antibody Responses and Antibody-Immunogen Complex Simulation of a Designed Multi-Epitope Vaccine against SARS-COV-2.\",\"authors\":\"Ghadir A Jamal, Ehsan Jahangirian, Hossein Tarrahimofrad\",\"doi\":\"10.2174/0109298665320319240809095727\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>The spread of the COVID-19 disease is the result of an infection caused by the SARS-CoV2 virus. Four crucial proteins, spike [S], membrane [M], nucleocapsid [N], and envelope [E] in coronaviruses have been considered to a large extent.</p><p><strong>Objective: </strong>This research aimed to express the recombinant protein of a multiepitope immunogen construct and evaluate the immunogenicity of the multiepitope vaccine that was previously designed as a candidate immunogenic against SARS-Cov-2.</p><p><strong>Materials and methods: </strong>Plasmid pET26b was transferred to the expression host E. coli BL21 [DE3] and the recombinant protein was expressed with IPTG induction. The recombinant protein was purified by Ni-NTA column affinity chromatography, and western blotting was used to confirm it. Finally, mice were immunized with recombinant protein in three doses. Then, the interaction of the 3D structure of the vaccine with the human neutralizing antibodies3D structures [7BWJ and 7K8N] antibody was evaluated by docking and molecular dynamics simulation.</p><p><strong>Results: </strong>The optimized gene had a codon compatibility index of 0.96. The expression of the recombinant protein of the SARS-Cov-2 vaccine in an E. coli host led to the production of the recombinant protein with a weight of about 70 kDa with a concentration of 0.7 mg/ml. Immunization of mice with recombinant protein of SARS-Cov-2 vaccine-induced IgG serum antibody response. Statistical analysis showed that the antibody titer in comparison with the control sample has a significant difference, and the antibody titer was acceptable up to 1/256000 dilution. 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Expression, Purification, and Evaluation of Antibody Responses and Antibody-Immunogen Complex Simulation of a Designed Multi-Epitope Vaccine against SARS-COV-2.
Background: The spread of the COVID-19 disease is the result of an infection caused by the SARS-CoV2 virus. Four crucial proteins, spike [S], membrane [M], nucleocapsid [N], and envelope [E] in coronaviruses have been considered to a large extent.
Objective: This research aimed to express the recombinant protein of a multiepitope immunogen construct and evaluate the immunogenicity of the multiepitope vaccine that was previously designed as a candidate immunogenic against SARS-Cov-2.
Materials and methods: Plasmid pET26b was transferred to the expression host E. coli BL21 [DE3] and the recombinant protein was expressed with IPTG induction. The recombinant protein was purified by Ni-NTA column affinity chromatography, and western blotting was used to confirm it. Finally, mice were immunized with recombinant protein in three doses. Then, the interaction of the 3D structure of the vaccine with the human neutralizing antibodies3D structures [7BWJ and 7K8N] antibody was evaluated by docking and molecular dynamics simulation.
Results: The optimized gene had a codon compatibility index of 0.96. The expression of the recombinant protein of the SARS-Cov-2 vaccine in an E. coli host led to the production of the recombinant protein with a weight of about 70 kDa with a concentration of 0.7 mg/ml. Immunization of mice with recombinant protein of SARS-Cov-2 vaccine-induced IgG serum antibody response. Statistical analysis showed that the antibody titer in comparison with the control sample has a significant difference, and the antibody titer was acceptable up to 1/256000 dilution. The simulation of vaccine binding with human antibodies by molecular dynamics showed that Root Mean Square Deviation [RMSD], Root Mean Square Fluctuation [RMSF], Radius of Gyration, and H-bond as well as van der Waals energies and electrostatic of Molecular mechanics Poisson- Boltzmann surface area [MM/PBSA] analysis have stable interaction.
Conclusion: This recombinant protein can probably be used as an immunogen candidate for the development of vaccines against SARS-CoV2 in future research.
期刊介绍：
Protein & Peptide Letters publishes letters, original research papers, mini-reviews and guest edited issues in all important aspects of protein and peptide research, including structural studies, advances in recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, and drug design. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallization and preliminary structure determination of biologically important proteins are considered only if they include significant new approaches or deal with proteins of immediate importance, and preliminary structure determinations of biologically important proteins. Purely theoretical/review papers should provide new insight into the principles of protein/peptide structure and function. Manuscripts describing computational work should include some experimental data to provide confirmation of the results of calculations.
Protein & Peptide Letters focuses on:
Structure Studies
Advances in Recombinant Expression
Drug Design
Chemical Synthesis
Function
Pharmacology
Enzymology
Conformational Analysis
Immunology
Biotechnology
Protein Engineering
Protein Folding
Sequencing
Molecular Recognition
Purification and Analysis
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