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Updated: Apr 16, 2026

Probiotic Studies in Neonatal Mice Using Gavage
Published on: January 27, 2019
Is there a role for probiotics in the prevention of preterm birth?
Siwen Yang1, Gregor Reid2, John R G Challis3
1Department of Physiology, Obstetrics and Gynecology, University of Toronto , Toronto, ON , Canada ; Lunenfeld Tanenbaum Research Institute, Mount Sinai Hospital , Toronto, ON , Canada.
Insights
Preterm birth (PTB) is linked to vaginal microbiome changes and inflammation. Lactobacillus probiotics may help prevent PTB by restoring vaginal health and reducing inflammation.
Area of Science:
- Reproductive health
- Microbiome research
- Immunology
Background:
- Preterm birth (PTB) remains a significant global health concern.
- Inflammation, indicated by elevated cytokines and chemokines, and an altered maternal vaginal microbiome are implicated in PTB pathogenesis.
- Lactobacillus depletion, common in bacterial vaginosis (BV), correlates with increased PTB risk.
Purpose of the Study:
- To investigate the role of the vaginal microbiome in PTB.
- To explore the potential of Lactobacillus probiotics in preventing PTB.
- To understand the anti-inflammatory mechanisms of lactobacilli.
Main Methods:
- Review of existing literature on PTB, vaginal microbiome, and Lactobacillus probiotics.
- Analysis of the association between vaginal dysbiosis and PTB risk.
- Examination of the anti-inflammatory properties of lactobacilli.
Main Results:
- An aberrant vaginal microbiome composition may trigger PTB.
- Lactobacillus probiotics show potential in reducing BV and inflammation.
- Clinical studies, though not yet powered for PTB, suggest merit in this approach.
Conclusions:
- The vaginal microbiome plays a critical role in PTB.
- Lactobacillus probiotics offer a promising strategy for PTB prevention.
- Further research is warranted to confirm the efficacy of probiotics in large-scale clinical trials.
Abstract:
Preterm birth (PTB) continues to be a global health challenge. An over-production of inflammatory cytokines and chemokines, as well as an altered maternal vaginal microbiome has been implicated in the pathogenesis of inflammation/infection-associated PTB. Lactobacillus represents the dominant species in the vagina of most healthy pregnant women. The depletion of Lactobacillus in women with bacterial vaginosis (BV) has been associated with an increased risk of PTB. It remains unknown at what point an aberrant vaginal microbiome composition specifically induces the cascade leading to PTB. The ability of oral or vaginal lactobacilli probiotics to reduce BV occurrence and/or dampen inflammation is being considered as a means to prevent PTB. Certain anti-inflammatory properties of lactobacilli suggest potential mechanisms. To date, clinical studies have not been powered with sufficiently high rates of PTB, but overall, there is merit in examining this promising area of clinical science.
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