PUBLICATION
DNA vaccination with the Mycobacterium marinum MMAR_4110 antigen inhibits reactivation of a latent mycobacterial infection in the adult Zebrafish
- Authors
- Niskanen, M., Myllymäki, H., Rämet, M.
- ID
- ZDB-PUB-200708-2
- Date
- 2020
- Source
- Vaccine 38(35): 5685-5694 (Journal)
- Registered Authors
- Niskanen, Mirja, Rämet, Mika
- Keywords
- DNA vaccine, Immunization, Reactivation, Tuberculosis, Zebrafish, mRNA sequencing
- MeSH Terms
-
- Animals
- DNA
- Disease Models, Animal
- Humans
- Mycobacterium Infections, Nontuberculous*/prevention & control
- Mycobacterium marinum*/genetics
- Vaccination
- Zebrafish
- PubMed
- 32624250 Full text @ Vaccine
Citation
Niskanen, M., Myllymäki, H., Rämet, M. (2020) DNA vaccination with the Mycobacterium marinum MMAR_4110 antigen inhibits reactivation of a latent mycobacterial infection in the adult Zebrafish. Vaccine. 38(35):5685-5694.
Abstract
Background Tuberculosis is a major challenge for health care, as options for its treatment and prevention are limited. Therefore, novel approaches, such as DNA vaccination, to both prevent primary infections and the reactivation of latent infections need to be developed. A Mycobacterium marinum infection in adult zebrafish (Danio rerio) recapitulates features of the human Mycobacterium tuberculosis infection, providing a convenient preclinical animal model for studying tuberculosis.
Methods Hypoxic M. marinum cultures were produced with the Wayne model, and further reaerated to replicate the in vivo reactivation in vitro. Expression levels of M. marinum genes were studied with mRNA sequencing from exponentially growing bacteria, anaerobic cultures and at 2 and 12 h after reaeration. Seven reactivation-associated genes were selected for further studies, where their antigen potentiality as DNA-vaccines to prevent reactivation of a latent mycobacterial infection was investigated in the adult zebrafish model. The Mann-Whitney test was used to evaluate differences in bacterial counts between the groups.
Results The mRNA sequencing data showed that, seven M. marinum genes, MMAR_0444, MMAR_0514, MMAR_0552, MMAR_0641, MMAR_1093, MMAR_4110 and MMAR_4524, were upregulated during reactivation when compared to both dormant and logarithmic growing bacteria. Four different MMAR_4110 antigens prevented the reactivation of a latent mycobacterial infection in the adult zebrafish.
Conclusion This study provides novel information about reactivation-related M. marinum genes. One of the antigens, MMAR_4110, inhibited the reactivation of a latent M. marinum infection in zebrafish, implicating that the characterized genes could be potential targets for further vaccine and drug development against mycobacterial diseases.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping