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Aging Eye Microbiota in Dry Eye Syndrome in Patients Treated with Enterococcus faecium and Saccharomyces boulardii

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Background: Aging and oxidative stress seem to play a key role in the onset and progression of ocular surface diseases. Dry Eye Syndrome (DES) is a multifactorial disease of the tears and ocular surface in which symptoms may interfere with the ability to work and carry out daily functions.

Methods: This clinical trial was a pilot study to evaluate the effects of supplementation with mixture (Saccharomyces boulardii MUCL 53837 and Enterococcus faecium LMG S-28935) on the tear film. Following the run-in period subjects were randomized in two groups: group A (n.30 subjects) and group B (n.30 subjects). Group A (control) treated only with substitute tear and group B treated with substitute tear + mixture (probiotic).

Results: The data obtained in the two study groups A and B were, respectively the following: Schirmer I: 9.2±0.2 vs. 12.8±0.4 (p< 0.001); Schirmer II: 3.6±0.1 vs. 4.6±0.2 (p<0.001); BUT 3.8±0.3 vs. 6.2±0.2 (p<0.001).

Culture test showed initial bacterial growth in group “A” (placebo) 27 out of 60 samples tested, corresponding to 45.0% and “B” after treatment (probiotic) was found positive culture whit growth of bacteria in 18 tests equal to 30.0%.

The total numbers of isolations of aerobic and anaerobic bacteria found group A and B after treatment. A reduction of 23 to 16 strains of aerobic and anaerobic isolates from 13 to 7 has been found.

Conclusion: The administration of probiotics strains was effective in reducing DES. In light of these results, we have identified our probiotic (Saccharomyces boulardii MUCL 53837 and Enterococcus faecium LMG S-28935) activity integration with the action of tear substitutes, along with standardization of clinical parameters of the tear film and microbiological activity in restoring of the microbiota ocular surface subject with DES.
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Keywords: Dry Eye Syndrome (DES); Enterococcus faecium LMGS- 28935; MUCL 53837; Saccharomyces boulardii; ocular microbiota; symbiotic; tear film

Document Type: Research Article

Publication date: May 1, 2017

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  • Current Clinical Pharmacology publishes frontier reviews on all the latest advances in clinical pharmacology. The journal's aim is to publish the highest quality review articles in the field. Topics covered include: pharmacokinetics; therapeutic trials; adverse drug reactions; drug interactions; drug metabolism; pharmacoepidemiology; and drug development. The journal is essential reading for all researchers in clinical pharmacology.
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