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In silico Prediction and Evaluation of Human Parainfluenza Virus-3 CD4+ T Cell Epitopes
Peyman Bemani1, Mozafar Mohammadi1
1Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
Insights
Researchers identified nine Human parainfluenza virus type 3 (HPIV-3) epitopes that bind to HLA class II molecules. These HPIV-3 epitopes show promise for developing new vaccines and treatments for immunocompromised patients.
Area of Science:
- Virology
- Immunology
- Bioinformatics
Background:
- Human parainfluenza virus type 3 (HPIV-3) causes severe respiratory infections, particularly in infants and immunocompromised individuals.
- Current treatments lack specificity, and no approved vaccine exists for HPIV-3.
- Identifying HPIV-3 epitopes that bind to HLA class II molecules is crucial for vaccine design and T-cell therapies.
Purpose of the Study:
- To predict and evaluate CD4+ T-cell epitopes (HLA-II binders) from four key HPIV-3 antigens.
- To identify potential candidates for vaccine development and therapeutic interventions.
Main Methods:
- Bio- and immunoinformatics software were used to predict epitopes from HPIV-3 F, HN, N, and M proteins.
- Predicted epitopes underwent evaluation for toxicity, allergenicity, blast screening, and population coverage.
- Binding affinity was assessed using molecular docking studies.
Main Results:
- Nine candidate epitopes were selected after rigorous filtering, including blast screening, toxicity/allergenicity assays, and population coverage analysis.
- Docking studies confirmed significantly higher binding affinity for the selected epitopes compared to negative controls.
- The identified epitopes demonstrate high population coverage.
Conclusions:
- The selected HPIV-3 epitopes are potential candidates for designing novel vaccine strategies.
- These epitopes may also be valuable for in vitro T-cell stimulation in immunocompromised patients and transplant recipients.
Background:
Human parainfluenza viruses type 3 (HPIV-3) through bronchiolitis and pneumonia is a common cause of lower respiratory tract infections. It is the main cause of hospitalization of infants and young children and also one of the main causes of morbidity and mortality in immuno-compromised and transplant patients. Despite many efforts, there is currently no specific anti-HPIV-3 drug or approved vaccine to prevent and control the virus. Identification of HPIV-3 epitopes with the capability of binding to human leukocyte antigen (HLA) class II molecules can be helpful in designing new vaccine candidates against HPIV-3 infection, and also can be useful for the in vitro stimulation and proliferation of HPIV-3-specific T cells for transplant and immunocompromised patients.
Objective:
To predict and comprehensively evaluate CD4+T cell epitope (HLA-II binders) from four main HPIV-3 antigens.
Methods:
In the present work, we predicted and comprehensively evaluated CD4+T cell epitope (HLA-II binders) from four main HPIV-3 antigens, including fusion protein (F), hemagglutininneuraminidase (HN), nucleocapsid (N) and matrix (M) proteins using bio- and immunoinformatics software. The toxicity, allergenicity, Blast screening and population coverage of the predicted epitopes were evaluated. The binding ability of the final selected epitopes was evaluated via a docking study.
Results:
After several filtering steps, including blast screening, toxicity and allergenicity assay, population coverage and docking study, 9 epitopes were selected as candidate epitopes. The selected epitopes showed high population coverage and docking studies revealed a significantly higher binding affinity for the final epitopes in comparison with the negative control peptides.
Conclusion:
The final selected epitopes could be useful in designing vaccine candidates and for the treatment of immune-compromised individuals and patients with transplantation.
