ABSTRACT
While mankind is still dealing with the COVID-19 pandemic, a case of monkeypox virus (MPXV) has been reported to the WHO on May 7, 2022. Monkeypox is a viral zoonotic disease that has been a public health threat, particularly in Africa. However, it has recently expanded to other parts of the world, so it may soon become a global issue. Thus, the current work was planned and then designed a multi-epitope vaccine against MPXV utilizing the cell surface-binding protein as a target in order to develop a novel and safe vaccine that can evoke the desirable immunological response. The proposed MHC-I, MHC-II, and B-cell epitopes were selected to design multi-epitope vaccine constructs linked with suitable linkers in combination with different adjuvants to enhance the immune responses for the vaccine constructs. The proposed vaccine was composed of 275 amino acids and was shown to be antigenic in Vaxijen server (0.5311) and non-allergenic in AllerTop server. The 3D structure of the designed vaccine was predicted, refined and validated by various in silico tools to assess the stability of the vaccine. Moreover, the solubility of the vaccine construct was found greater than the average solubility provided by protein-Sol server which indicating the solubility of the vaccine construct. Additionally, the most promising epitopes bound to MHC I and MHC II alleles were found having good binding affinities with low energies ranging between - 7.0 and - 8.6 kcal/mol. According to the immunological simulation research, the vaccine was found to elicit a particular immune reaction against the monkeypox virus. Finally, the molecular dynamic study shows that the designed vaccine is stable with minimum RMSF against MHC I allele. We conclude from our research that the cell surface-binding protein is one of the primary proteins involved in MPXV pathogenesis. As a result, our study will aid in the development of appropriate therapeutics and prompt the development of future vaccines against MPXV.
Subject(s)
COVID-19 , Epitopes, B-Lymphocyte , Amino Acids , Computational Biology , Epitopes, T-Lymphocyte , Humans , Molecular Docking Simulation , Monkeypox virus , Pandemics/prevention & control , Vaccines, SubunitABSTRACT
Abstract: Background: The COVID-19 pandemic is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). At the time of writing, neither a cure nor a vaccine has been approved by the World health organization (WHO) for this disease. Given the fact that the severe acute respiratory syndrome coronavirus (SARS) and Middle East Respiratory Syndrome (MERS) viruses have a genetic sequencing similar to SARS-CoV-2, and since the use of convalescent plasma therapy (CP) has proved its efficacy in SARS and MERS virus infections, researchers are starting to focus more on it as apossible therapy for the COVID-19 disease. The main objective of this rapid review is to report and summarize the published evidence on the role of convalescent plasma therapy in the current COVID-19 pandemic.Method: The PICO method was used to establish the review question. Moreover, papers were gathered from PubMed and Google scholar, critically appraised for the best evidence. Piersons 5-component scheme was used to check the quality of the review papers.Results: After website screening: 10 papers in PubMed and 6 papers from Google scholars were retrieved. There were encouraging reports regarding the uses of CP in the previous viral outbreaks likes SARS and Ebola, yet there is still a doubt on the efficacy of this mode of therapy in the current COVID-19 pandemic.Conclusion: CP is a very promising treatment approach for COVID-19 patients;however, more clinical trials are required to validate the effectiveness of this therapy
ABSTRACT
The novel coronavirus is not only causing respiratory problems, but it may also damage the heart, kidneys, liver, and other organs; in Wuhan, 14 to 30% of COVID-19 patients have lost their kidney function and now require either dialysis or kidney transplants. The novel coronavirus gains entry into humans by targeting the ACE2 receptor that found on lung cells, which destroy human lungs through cytokine storms, and this leads to hyperinflammation, forcing the immune cells to destroy healthy cells. This is why some COVID-19 patients need intensive care. The inflammatory chemicals released during COVID-19 infection cause the liver to produce proteins that defend the body from infections. However, these proteins can cause blood clotting, which can clog blood vessels in the heart and other organs; as a result, the organs are deprived of oxygen and nutrients which could ultimately lead to multiorgan failure and consequent progression to acute lung injury, acute respiratory distress syndrome, and often death. However, there are novel protein modification tools called the QTY code, which are similar in their structure to antibodies, which could provide a solution to excess cytokines. These synthetic proteins can be injected into the body to bind the excess cytokines created by the cytokine storm; this will eventually remove the excessive cytokines and inhibit the severe symptoms caused by the COVID-19 infection. In this review, we will focus on cytokine storm in COVID-19 patients, their impact on the body organs, and the potential treatment by QTY code-designed detergent-free chemokine receptors.
Subject(s)
Coronavirus Infections/complications , Coronavirus Infections/immunology , Cytokine Release Syndrome/etiology , Cytokine Release Syndrome/therapy , Pneumonia, Viral/complications , Pneumonia, Viral/immunology , Receptors, Chemokine/therapeutic use , Betacoronavirus , COVID-19 , Coronavirus Infections/drug therapy , Coronavirus Infections/therapy , Cytokine Release Syndrome/immunology , Cytokines/antagonists & inhibitors , Drug Design , Humans , Inflammation Mediators/blood , Inflammation Mediators/immunology , Models, Molecular , Multiple Organ Failure/etiology , Multiple Organ Failure/immunology , Multiple Organ Failure/therapy , Pandemics , Pneumonia, Viral/therapy , Protein Engineering , Protein Modification, Translational , Receptors, Chemokine/genetics , Receptors, Chemokine/metabolism , SARS-CoV-2 , COVID-19 Drug TreatmentABSTRACT
BACKGROUND: A new endemic disease has spread across Wuhan City, China, in December 2019. Within few weeks, the World Health Organization (WHO) announced a novel coronavirus designated as coronavirus disease 2019 (COVID-19). In late January 2020, WHO declared the outbreak of a "public-health emergency of international concern" due to the rapid and increasing spread of the disease worldwide. Currently, there is no vaccine or approved treatment for this emerging infection; thus, the objective of this study is to design a multiepitope peptide vaccine against COVID-19 using an immunoinformatics approach. METHOD: Several techniques facilitating the combination of the immunoinformatics approach and comparative genomic approach were used in order to determine the potential peptides for designing the T-cell epitope-based peptide vaccine using the envelope protein of 2019-nCoV as a target. RESULTS: Extensive mutations, insertion, and deletion were discovered with comparative sequencing in the COVID-19 strain. Additionally, ten peptides binding to MHC class I and MHC class II were found to be promising candidates for vaccine design with adequate world population coverage of 88.5% and 99.99%, respectively. CONCLUSION: The T-cell epitope-based peptide vaccine was designed for COVID-19 using the envelope protein as an immunogenic target. Nevertheless, the proposed vaccine rapidly needs to be validated clinically in order to ensure its safety and immunogenic profile to help stop this epidemic before it leads to devastating global outbreaks.