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Lactobacillus fermentum UCO-979C strongly inhibited Helicobacter pylori SS1 in Meriones unguiculatus
J S Merino1, A García1, E Pastene2
11 Departamento de Microbiología, Facultad de Ciencias Biológicas, Universidad de Concepción, Víctor Lamas 1290, 4030000 Concepción, Chile.
Abstract:
Searching for bacterial probiotics active upon Helicobacter pylori continue to be an important clinical challenge because of the increased prevalence of this highly priority pathogen in humans. In this work, we assess the in vivo anti-H. pylori SS1 (cagA+/vacAs2m2+) properties of a previously isolated human gastric probiotic strain Lactobacillus fermentum UCO-979C by using a Meriones unguiculatus (Mongolian gerbil) model. Animals were administered with a saline suspension of L. fermentum UCO-979C or H. pylori SS1 as negative and positive control for H. pylori colonisation controls, prior to assayed the challenge group that was administered with these two species per animal for detecting protective activity of the probiotic strain against colonisation. The results showed that L. fermentum UCO-979C strongly inhibited the colonisation of H. pylori decreasing up to 87% of the colonisation in the antrum by the pathogen, suggesting that this probiotic strain has a strong probiotic activity against H. pylori in the most valuable animal model for in vivo assays nowadays.
Insights
Researchers found that Lactobacillus fermentum UCO-979C significantly inhibited Helicobacter pylori colonization in gerbils. This human gastric probiotic shows strong potential for combating this common, high-priority pathogen.
Area of Science:
- Microbiology
- Gastroenterology
- Probiotics
Background:
- Helicobacter pylori is a high-priority pathogen with increasing prevalence.
- Developing effective bacterial probiotics against H. pylori remains a clinical challenge.
Purpose of the Study:
- To evaluate the in vivo anti-H. pylori efficacy of the human gastric probiotic strain Lactobacillus fermentum UCO-979C.
- To assess the protective activity of L. fermentum UCO-979C against H. pylori colonization in a Mongolian gerbil model.
Main Methods:
- A Mongolian gerbil model (Meriones unguiculatus) was employed.
- Animals were administered L. fermentum UCO-979C and/or H. pylori SS1.
- H. pylori colonization levels in the antrum were quantified to assess probiotic activity.
Main Results:
- Lactobacillus fermentum UCO-979C demonstrated significant inhibition of H. pylori SS1 colonization.
- A reduction of up to 87% in gastric antrum colonization by H. pylori was observed.
- The probiotic strain showed strong anti-H. pylori activity in vivo.
Conclusions:
- Lactobacillus fermentum UCO-979C exhibits potent probiotic properties against Helicobacter pylori.
- This strain is a promising candidate for further development as a therapeutic agent against H. pylori infections.
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