In vivo safety assessment of Lactobacillus fermentum strains, evaluation of their cholesterol‐lowering ability and intestinal microbial modulation

BACKGROUND Despite the growing importance of probiotics apparent health benefits, an impediment to the use of new probiotic cultures is their safety. Hence there is a need to strictly examine the biosafety as well as health benefits of probiotics in in vivo model systems. RESULTS In this study, two...

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Veröffentlicht in:Journal of the science of food and agriculture 2020-01, Vol.100 (2), p.705-713
Hauptverfasser: Thumu, Surya Chandra Rao, Halami, Prakash M
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Halami, Prakash M
description BACKGROUND Despite the growing importance of probiotics apparent health benefits, an impediment to the use of new probiotic cultures is their safety. Hence there is a need to strictly examine the biosafety as well as health benefits of probiotics in in vivo model systems. RESULTS In this study, two lactic acid bacterial (LAB) cultures Lactobacillus fermentum NCMR 2826 and FIX proven for their in vitro probiotic properties were investigated for their in vivo safety in Wistar rats. An acute toxicity study (14 days) with a high dose of biomass (1016 colony‐forming units (CFU) mL−1) followed by a subchronic test for 13 weeks with oral feeding of the probiotic cultures in three different doses (107, 108 and 1010 CFU mL−1) on a daily basis revealed the safety of the L. fermentum cultures. The probiotic feeding had no toxic effects on survival, body weight and food consumption with any of the dosages used throughout the treatment period. No statistically significant changes in relative organ weights and serum biochemical and hematological indices were found between the control and the probiotic fed animals. In addition to the safety attributes, the L. fermentum culture fed rats showed reduced serum cholesterol levels, macrovesicular steatosis and hepatocyte ballooning compared with control animals. Further, quantification of intestinal microbiota using real‐time polymerase chain reaction (PCR) analysis from animal feces indicated a significant increase and stability of Lactobacillus and Bifidobacterium counts but a decrease of Escherichia coli numbers. CONCLUSION This study of safety and beneficial features highlights the use of the two native L. fermentum isolates as potential probiotic food supplements. © 2019 Society of Chemical Industry
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Hence there is a need to strictly examine the biosafety as well as health benefits of probiotics in in vivo model systems. RESULTS In this study, two lactic acid bacterial (LAB) cultures Lactobacillus fermentum NCMR 2826 and FIX proven for their in vitro probiotic properties were investigated for their in vivo safety in Wistar rats. An acute toxicity study (14 days) with a high dose of biomass (1016 colony‐forming units (CFU) mL−1) followed by a subchronic test for 13 weeks with oral feeding of the probiotic cultures in three different doses (107, 108 and 1010 CFU mL−1) on a daily basis revealed the safety of the L. fermentum cultures. The probiotic feeding had no toxic effects on survival, body weight and food consumption with any of the dosages used throughout the treatment period. No statistically significant changes in relative organ weights and serum biochemical and hematological indices were found between the control and the probiotic fed animals. In addition to the safety attributes, the L. fermentum culture fed rats showed reduced serum cholesterol levels, macrovesicular steatosis and hepatocyte ballooning compared with control animals. Further, quantification of intestinal microbiota using real‐time polymerase chain reaction (PCR) analysis from animal feces indicated a significant increase and stability of Lactobacillus and Bifidobacterium counts but a decrease of Escherichia coli numbers. CONCLUSION This study of safety and beneficial features highlights the use of the two native L. fermentum isolates as potential probiotic food supplements. © 2019 Society of Chemical Industry</description><identifier>ISSN: 0022-5142</identifier><identifier>EISSN: 1097-0010</identifier><identifier>DOI: 10.1002/jsfa.10071</identifier><identifier>PMID: 31599967</identifier><language>eng</language><publisher>Chichester, UK: John Wiley &amp; Sons, Ltd</publisher><subject>Acute toxicity ; Animals ; Anticholesteremic Agents - administration &amp; dosage ; Anticholesteremic Agents - metabolism ; Bacteria - classification ; Bacteria - drug effects ; Bacteria - genetics ; Bacteria - isolation &amp; purification ; Biocompatibility ; Body weight ; Cholesterol ; Cholesterol - blood ; Cholesterol - metabolism ; cholesterol lowering ; Dietary supplements ; Dosage ; E coli ; Feeding ; Food ; Food consumption ; Gastrointestinal Microbiome - drug effects ; gut microbial modulation ; Hematology ; In vivo methods and tests ; in vivo safety ; Intestinal microflora ; Intestine ; Intestines - drug effects ; Intestines - microbiology ; Lactic acid ; Lactobacillus fermentum ; Lactobacillus fermentum - growth &amp; development ; Lactobacillus fermentum - metabolism ; Male ; Microbiota ; Microorganisms ; Organic chemistry ; Polymerase chain reaction ; Probiotics ; Probiotics - administration &amp; dosage ; Probiotics - metabolism ; Rats ; Rats, Wistar ; Safety ; Stability analysis ; Statistical analysis ; Steatosis ; Toxicity ; Yogurt</subject><ispartof>Journal of the science of food and agriculture, 2020-01, Vol.100 (2), p.705-713</ispartof><rights>2019 Society of Chemical Industry</rights><rights>2019 Society of Chemical Industry.</rights><rights>Copyright © 2020 Society of Chemical Industry</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3931-ba2d2383cb0467cf835c4995a4e868d3c1dd38a117565b8665d815d1befba2133</citedby><cites>FETCH-LOGICAL-c3931-ba2d2383cb0467cf835c4995a4e868d3c1dd38a117565b8665d815d1befba2133</cites><orcidid>0000-0002-0293-1891</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fjsfa.10071$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fjsfa.10071$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/31599967$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Thumu, Surya Chandra Rao</creatorcontrib><creatorcontrib>Halami, Prakash M</creatorcontrib><title>In vivo safety assessment of Lactobacillus fermentum strains, evaluation of their cholesterol‐lowering ability and intestinal microbial modulation</title><title>Journal of the science of food and agriculture</title><addtitle>J Sci Food Agric</addtitle><description>BACKGROUND Despite the growing importance of probiotics apparent health benefits, an impediment to the use of new probiotic cultures is their safety. Hence there is a need to strictly examine the biosafety as well as health benefits of probiotics in in vivo model systems. RESULTS In this study, two lactic acid bacterial (LAB) cultures Lactobacillus fermentum NCMR 2826 and FIX proven for their in vitro probiotic properties were investigated for their in vivo safety in Wistar rats. An acute toxicity study (14 days) with a high dose of biomass (1016 colony‐forming units (CFU) mL−1) followed by a subchronic test for 13 weeks with oral feeding of the probiotic cultures in three different doses (107, 108 and 1010 CFU mL−1) on a daily basis revealed the safety of the L. fermentum cultures. The probiotic feeding had no toxic effects on survival, body weight and food consumption with any of the dosages used throughout the treatment period. No statistically significant changes in relative organ weights and serum biochemical and hematological indices were found between the control and the probiotic fed animals. In addition to the safety attributes, the L. fermentum culture fed rats showed reduced serum cholesterol levels, macrovesicular steatosis and hepatocyte ballooning compared with control animals. Further, quantification of intestinal microbiota using real‐time polymerase chain reaction (PCR) analysis from animal feces indicated a significant increase and stability of Lactobacillus and Bifidobacterium counts but a decrease of Escherichia coli numbers. 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development</topic><topic>Lactobacillus fermentum - metabolism</topic><topic>Male</topic><topic>Microbiota</topic><topic>Microorganisms</topic><topic>Organic chemistry</topic><topic>Polymerase chain reaction</topic><topic>Probiotics</topic><topic>Probiotics - administration &amp; dosage</topic><topic>Probiotics - metabolism</topic><topic>Rats</topic><topic>Rats, Wistar</topic><topic>Safety</topic><topic>Stability analysis</topic><topic>Statistical analysis</topic><topic>Steatosis</topic><topic>Toxicity</topic><topic>Yogurt</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Thumu, Surya Chandra Rao</creatorcontrib><creatorcontrib>Halami, Prakash M</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Ceramic Abstracts</collection><collection>Chemoreception Abstracts</collection><collection>Computer and Information Systems Abstracts</collection><collection>Corrosion Abstracts</collection><collection>Ecology Abstracts</collection><collection>Electronics &amp; 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Hence there is a need to strictly examine the biosafety as well as health benefits of probiotics in in vivo model systems. RESULTS In this study, two lactic acid bacterial (LAB) cultures Lactobacillus fermentum NCMR 2826 and FIX proven for their in vitro probiotic properties were investigated for their in vivo safety in Wistar rats. An acute toxicity study (14 days) with a high dose of biomass (1016 colony‐forming units (CFU) mL−1) followed by a subchronic test for 13 weeks with oral feeding of the probiotic cultures in three different doses (107, 108 and 1010 CFU mL−1) on a daily basis revealed the safety of the L. fermentum cultures. The probiotic feeding had no toxic effects on survival, body weight and food consumption with any of the dosages used throughout the treatment period. No statistically significant changes in relative organ weights and serum biochemical and hematological indices were found between the control and the probiotic fed animals. In addition to the safety attributes, the L. fermentum culture fed rats showed reduced serum cholesterol levels, macrovesicular steatosis and hepatocyte ballooning compared with control animals. Further, quantification of intestinal microbiota using real‐time polymerase chain reaction (PCR) analysis from animal feces indicated a significant increase and stability of Lactobacillus and Bifidobacterium counts but a decrease of Escherichia coli numbers. CONCLUSION This study of safety and beneficial features highlights the use of the two native L. fermentum isolates as potential probiotic food supplements. © 2019 Society of Chemical Industry</abstract><cop>Chichester, UK</cop><pub>John Wiley &amp; Sons, Ltd</pub><pmid>31599967</pmid><doi>10.1002/jsfa.10071</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0002-0293-1891</orcidid><oa>free_for_read</oa></addata></record>
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subjects Acute toxicity
Animals
Anticholesteremic Agents - administration & dosage
Anticholesteremic Agents - metabolism
Bacteria - classification
Bacteria - drug effects
Bacteria - genetics
Bacteria - isolation & purification
Biocompatibility
Body weight
Cholesterol
Cholesterol - blood
Cholesterol - metabolism
cholesterol lowering
Dietary supplements
Dosage
E coli
Feeding
Food
Food consumption
Gastrointestinal Microbiome - drug effects
gut microbial modulation
Hematology
In vivo methods and tests
in vivo safety
Intestinal microflora
Intestine
Intestines - drug effects
Intestines - microbiology
Lactic acid
Lactobacillus fermentum
Lactobacillus fermentum - growth & development
Lactobacillus fermentum - metabolism
Male
Microbiota
Microorganisms
Organic chemistry
Polymerase chain reaction
Probiotics
Probiotics - administration & dosage
Probiotics - metabolism
Rats
Rats, Wistar
Safety
Stability analysis
Statistical analysis
Steatosis
Toxicity
Yogurt
title In vivo safety assessment of Lactobacillus fermentum strains, evaluation of their cholesterol‐lowering ability and intestinal microbial modulation
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