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Comparative study of probiotic effects of Lactobacillus and Bifidobacteria strains on cholesterol levels, liver morphology and the gut microbiota in obese mice
Background Microbiome-modulating interventions are promising for treatment and prevention of metabolic syndrome. The number of probiotic strains demonstrated ability to decrease cholesterol level in vivo, however, it was poorly confirmed in a clinical setting. The aim was to study the effects of L....
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Published in: | The EPMA journal 2017-12, Vol.8 (4), p.357-376 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Background
Microbiome-modulating interventions are promising for treatment and prevention of metabolic syndrome. The number of probiotic strains demonstrated ability to decrease cholesterol level in vivo, however, it was poorly confirmed in a clinical setting. The aim was to study the effects of
L. acidophilus
IMV B-7279,
L. casei
IMV B-7280,
B. animalіs
VKL and
B. animalіs
VKB separately and in various compositions on the level of serum cholesterol, gut microbiota contents and liver morphology on a high-calorie-induced obesity model in BALB/c mice.
Materials and methods
We used for the study female BALB/c mice 6–8 weeks old (18–24 g). Experimental animals were fed by a fat-enriched diet (FED), and 8 experimental groups were formed (12 mice in each group) to test strains of probiotic bacteria
L. delbrueckii
subsp.
bulgaricus
IMV B-7281,
L. casei
IMV B-7280,
B. animalіs
VKL and
B. animalіs
VKB and compositions. We used ultrasound for in vivo assessment of the liver and visceral (mesenteric) fat size. In the blood serum of the obese mice, the level of cholesterol was estimated. The liver morphology and gut microbiota of obese mice were studied.
Results
We revealed that after treatment with all of the studied probiotic bacteria and compositions of
B. animalis
VKL/
B. animalis
VKB/
L. casei
IMV B-7280, the weight of obese mice decreased, and cholesterol and its fraction levels in serum were reduced. The size of the liver slightly decreased after treatment with
L. delbrueckii
subsp.
bulgaricus
IMV B-7281,
B. аnimalis
VKB or probiotic compositions; we observed reduction of the mesenteric fat size after injection of all these probiotic bacteria (separately) and probiotic compositions. We defined the strain-dependent effects on serum lipid profiles, liver morphology and the gut microbiota. The
B. animalis
VKL/
B. animalis
VKB/
L. casei
IMV B-7280 composition effectively recovered the liver morphological structure of obese mice. The number of
Lactobacillus
spp.,
Bifidobacterium
spp. and coliform bacteria increased, the number of staphylococci and streptococci reduced, and the number of microscopic fungi significantly decreased in the gut of obese mice after treatment with
L. casei
IMV B-7280,
L. delbrueckii
subsp.
bulgaricus
IMV B-7281,
B. animalis
(separately) or their compositions.
Conclusion
L. casei
IMV B-7280 (separately) and a composition of
B. animalis
VKL/
B. animalis
VKB/
L. casei
IMV B-7280 are effective at decreasing the weight of obese mice, decreasing |
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ISSN: | 1878-5077 1878-5085 |
DOI: | 10.1007/s13167-017-0117-3 |