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Multiepitope mRNA Vaccine mRNA-mEp21-FL-IDT Provides Efficient Protection against M. tuberculosis
Alisa A Kazakova1, Galina S Shepelkova2, Ivan S Kukushkin1
1Sirius University of Science and Technology, Sirius Federal Territory, 354340, Russia.
Biochemistry. Biokhimiia
|July 3, 2025
Summary
New mRNA vaccines show promise for tuberculosis prevention. One candidate vaccine, mRNA-mEp21-FL-IDT, effectively reduced bacterial load and improved survival in mice, offering protection comparable to the BCG vaccine.
Area of Science:
- Vaccinology
- Immunology
- Infectious Diseases
Background:
- Tuberculosis remains a significant global health threat, causing numerous deaths annually.
- Developing effective tuberculosis vaccines is crucial for reducing disease incidence and mortality.
- Messenger RNA (mRNA) vaccine technology has demonstrated success against viral infections and presents a promising avenue for novel vaccine development.
Purpose of the Study:
- To design and evaluate novel multiepitope mRNA vaccines against tuberculosis.
- To assess the immunogenicity and protective efficacy of these candidate vaccines in a murine model.
Main Methods:
- Utilized immunoinformatic approaches to design four distinct antituberculosis multiepitope mRNA vaccines.
- Incorporated varying adjuvants and codon compositions into the vaccine constructs.
- Tested vaccine immunogenicity and protective effects in mice challenged with *Mycobacterium tuberculosis*.
Main Results:
- Most developed mRNA vaccines successfully induced both cellular and humoral immune responses.
- Vaccines encoding the RpfE adjuvant showed a stronger adaptive immune response.
- The mRNA-mEp21-FL-IDT vaccine, featuring the FL adjuvant, demonstrated the best protective efficacy.
- This lead vaccine significantly reduced lung mycobacterial burden and enhanced survival rates in infected mice.
Conclusions:
- The developed mRNA-mEp21-FL-IDT vaccine provides robust protection against tuberculosis in mice.
- Its efficacy is comparable to the established Bacillus Calmette-Guérin (BCG) vaccine.
- mRNA technology holds significant potential for creating next-generation antituberculosis vaccines.
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