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Development of a luciferase-based reporter system to monitor Bifidobacterium breve UCC2003 persistence in mice
- Source :
- BMC Microbiology, BMC Microbiology, Vol 8, Iss 1, p 161 (2008)
- Publication Year :
- 2008
-
Abstract
- Background Probiotics such as bifidobacteria have been shown to maintain a healthy intestinal microbial balance and help protect against infections. However, despite these benefits, bifidobacteria still remain poorly understood at the biochemical, physiological and especially the genetic level. Herein we describe, for the first time, the development of a non-invasive luciferase-based reporter system for real-time tracking of Bifidobacterium species in vivo. Results The reporter vector pLuxMC1 is based on the recently described theta-type plasmid pBC1 from B. catenatulatum [1] and the luxABCDE operon from pPL2lux [2]. Derivatives of pLuxMC1, harbouring a bifidobacterial promoter (pLuxMC2) as well as a synthetically derived promoter (pLuxMC3) [3] placed upstream of luxABCDE, were constructed and found to stably replicate in B. breve UCC2003. The subsequent analysis of these strains allowed us to assess the functionality of pLuxMC1 both in vitro and in vivo. Conclusion Our results demonstrate the potential of pLuxMC1 as a real-time, non-invasive reporter system for Bifidobacterium. It has also allowed us, for the first time, to track the colonisation potential and persistence of this probiotic species in real time. An interesting and significant outcome of the study is the identification of the caecum as a niche environment for B. breve UCC2003 within the mouse gastrointestinal tract (GI) tract.
- Subjects :
- Microbiology (medical)
Operon
ved/biology.organism_classification_rank.species
lcsh:QR1-502
Colony Count, Microbial
Biology
Microbiology
lcsh:Microbiology
law.invention
Probiotic
Mice
Plasmid
law
In vivo
Genes, Reporter
Animals
Luciferase
Luciferases
Promoter Regions, Genetic
Gene
Bifidobacterium
Mice, Inbred BALB C
Bifidobacterium breve
ved/biology
Probiotics
biology.organism_classification
Gastrointestinal Tract
Luminescent Measurements
Female
Gastrointestinal system -- Bacterial Growth
Plasmids
Research Article
Subjects
Details
- ISSN :
- 14712180
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- BMC microbiology
- Accession number :
- edsair.doi.dedup.....102ba7f4b4a607b38fed77bcc6878b07