Abstract
Background:
Bacteriocins with antimicrobial activity are considered as potential alternatives to antibiotics. The aim of this study was to investigate the effect of albusin B (bacteriocin) of Ruminococcus albus 7 expressed by yeast on the growth performance of broiler chickens. Ninety 1-day-old healthy broiler chickens were randomly divided into three groups: control, albusin B (2.5 g kg(-1)) and nosiheptide (2.5 mg kg(-1), antibiotic control). Growth performance and intestinal functions were measured at 5 weeks of age.
Results:
Albusin B-supplemented broilers showed increased body weight gain compared with control broilers (54.7 ± 5.3 vs 48.5 ± 6.1 g day(-1) per bird, P < 0.05). Broilers supplemented with nosiheptide had a less developed mucosal layer than broilers in the other two groups. Compared with the control group, broilers supplemented with albusin B or nosiheptide showed increased mRNA expression of sGLT1, GLUT2 and PEPT1 in the jejunum (P < 0.05). The faecal Lactobacillus count was higher in the albusin B group than in the other two groups (P < 0.05).
Conclusion:
Albusin B supplementation increased intestinal absorption and elevated the faecal Lactobacillus count, thereby promoting the growth performance of broiler chickens. These improvements resulting from albusin B supplementation provide evidence of potential alternatives to antibiotics in broiler chicken feed.
Copyright © 2011 Society of Chemical Industry.
Publication types
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Randomized Controlled Trial
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Anti-Bacterial Agents / adverse effects
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Anti-Bacterial Agents / pharmacology
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Avian Proteins / genetics
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Avian Proteins / metabolism
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Bacteriocins / administration & dosage*
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Bacteriocins / adverse effects
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Bacteriocins / biosynthesis
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Bacteriocins / genetics
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Chickens / growth & development*
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Chickens / metabolism
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Chickens / microbiology*
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Excitatory Amino Acid Transporter 2 / genetics
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Excitatory Amino Acid Transporter 2 / metabolism
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Feces / microbiology
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Female
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Food Additives / administration & dosage*
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Food Additives / adverse effects
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Food Additives / pharmacology
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Gene Expression Regulation, Developmental / drug effects
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Glucose Transporter Type 2 / genetics
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Glucose Transporter Type 2 / metabolism
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Intestine, Small / cytology
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Intestine, Small / drug effects
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Intestine, Small / metabolism
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Lactobacillus / drug effects
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Lactobacillus / isolation & purification
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Male
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Peptide Transporter 1
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RNA, Messenger / metabolism
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Random Allocation
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Recombinant Proteins / administration & dosage
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Recombinant Proteins / biosynthesis
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Ruminococcus / metabolism*
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Saccharomyces cerevisiae / genetics
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Saccharomyces cerevisiae / metabolism
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Symporters / genetics
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Symporters / metabolism
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Weight Gain / drug effects
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Yeast, Dried / administration & dosage
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Yeast, Dried / adverse effects
Substances
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Anti-Bacterial Agents
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Avian Proteins
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Bacteriocins
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Excitatory Amino Acid Transporter 2
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Food Additives
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Glucose Transporter Type 2
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Peptide Transporter 1
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RNA, Messenger
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Recombinant Proteins
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Symporters