Design of Live Attenuated Bacterial Vaccines Based on D-glutamate Auxotrophy
Overview
Authors
Affiliations
Vaccine development is a priority for global health due to the growing multidrug resistance in bacteria. D-glutamate synthesis is essential for bacterial cell wall formation. Here we present a strategy for generating effective bacterial whole-cell vaccines auxotrophic for D-glutamate. We apply this strategy to generate D-glutamate auxotrophic vaccines for three major pathogens, Acinetobacter baumannii, Pseudomonas aeruginosa and Staphylococcus aureus. These bacterial vaccines show virulence attenuation and self-limited growth in mice, and elicit functional and cross-reactive antibodies, and cellular immunity. These responses correlate with protection against acute lethal infection with other strains of the same species, including multidrug resistant, virulent and/or high-risk clones such as A. baumannii AbH12O-A2 and Ab307-0294, P. aeruginosa PA14, and community-acquired methicillin-resistant S. aureus USA300LAC. This approach can potentially be applied for the development of live-attenuated vaccines for virtually any other bacterial pathogens, and does not require the identification of virulence determinants, which are often pathogen-specific.
Vaccine Development: Lessons, Challenges, and Future Innovations.
Santamarina-Fernandez R, Fuentes-Valverde V, Silva-Rodriguez A, Garcia P, Moscoso M, Bou G Int J Mol Sci. 2025; 26(5).
PMID: 40076637 PMC: 11900337. DOI: 10.3390/ijms26052012.
Sim H, Kwon Y, Song H, Hwang G, Yeom J BMC Microbiol. 2025; 25(1):74.
PMID: 39953398 PMC: 11829494. DOI: 10.1186/s12866-024-03654-1.
Microbes Saving Lives and Reducing Suffering.
Timmis K, Karahan Z, Ramos J, Koren O, Perez-Cobas A, Steward K Microb Biotechnol. 2025; 18(1):e70068.
PMID: 39844583 PMC: 11754571. DOI: 10.1111/1751-7915.70068.
Behrouz B, Rasooli I, Badmasti F Sci Rep. 2024; 14(1):27646.
PMID: 39533090 PMC: 11557591. DOI: 10.1038/s41598-024-79013-x.
Transient infection of with an engineered D-alanine auxotroph of .
Coppinger M, Yang L, Popham D, Ruby E, Stabb E Appl Environ Microbiol. 2024; 90(10):e0129824.
PMID: 39235243 PMC: 11497789. DOI: 10.1128/aem.01298-24.