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Protective Efficacy and Pulmonary Immune Response Following Subcutaneous and Intranasal BCG Administration in Mice
Published on: September 19, 2016
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[Transcriptomic analysis of tuberculosis peptide-based vaccine MP3RT in humanized mice]
1Tuberculosis Prevention and Control Key Laboratory/Beijing Key Laboratory of New Techniques of Tuberculosis Diagnosis and Treatment, Senior Department of Tuberculosis, the Eighth Medical Center of PLA General Hospital, Beijing 100091, China.
Summary
The MP3RT tuberculosis vaccine induced 367 differentially expressed genes (DEGs) in humanized mice, impacting metabolic and immune responses. Key pathways like MAPK were involved in its molecular mechanism.
Area of Science:
- Immunology
- Genomics
- Vaccinology
Background:
- Tuberculosis remains a significant global health challenge, necessitating novel vaccine strategies.
- Peptide-based vaccines offer a promising avenue for targeted immune responses.
- Understanding the molecular mechanisms of vaccine action is crucial for development.
Purpose of the Study:
- To identify differentially expressed genes (DEGs) induced by the MP3RT peptide-based vaccine in a humanized mouse model.
- To elucidate the molecular pathways and biological processes affected by MP3RT vaccination.
- To validate key gene expression changes using RT-qPCR.
Main Methods:
- Transcriptomics technology was employed to analyze gene expression profiles.
- EdgeR software was used for screening DEGs (fold change ≥ 1.5, P < 0.05).
- Gene Ontology (GO), KEGG pathway, and protein-protein interaction network analyses were performed. RT-qPCR validated significant DEGs.
Main Results:
- A total of 367 DEGs (214 upregulated, 153 downregulated) were identified.
- GO analysis revealed enrichment in cell metabolism, growth, apoptosis, and inflammation.
- KEGG analysis highlighted the involvement of inflammatory pathways, notably the MAPK signaling pathway. Abl1 showed highest protein interaction network connectivity.
- RT-qPCR confirmed significant differential expression for several genes, including cpne4, h2-q10, mef2c, ablim1, dll1, ms4a2, cd163l1, il1r1, and cd34.
Conclusions:
- The MP3RT vaccine significantly alters gene expression in humanized mice, affecting metabolic and immune responses.
- The p38 MAPK and JNK/MAPK signaling pathways are implicated in the molecular mechanism of the MP3RT vaccine.
- These findings provide insights into the immunomodulatory effects of peptide-based tuberculosis vaccines.
