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Effect of Bacillus subtilis on Aeromonas hydrophila-induced intestinal mucosal barrier function damage and inflammation in grass carp (Ctenopharyngodon idella)
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Effect of Bacillus subtilis on Aeromonas hydrophila-induced intestinal mucosal barrier function damage and inflammation in grass carp (Ctenopharyngodon idella)
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Journal Article
Effect of Bacillus subtilis on Aeromonas hydrophila-induced intestinal mucosal barrier function damage and inflammation in grass carp (Ctenopharyngodon idella)
2017
Overview
Our study explored the effect of oral intubation of
Bacillus subtilis
on
Aeromonas hydrophila
-induced intestinal mucosal barrier function damage and inflammation in grass carp. The mid-intestine mucosal tissue was collected for ATPase activity measurement. Intestinal mucosa was also ultrastructurally examined with transmission electron microscope (TEM), and its permeability was determined using Evans blue (EB) and D-lactic acid. The mid-intestine pro-inflammation cytokine, MyD88 and tight junction (TJ) protein mRNA expression levels were measured using real-time quantitative PCR. The results revealed that
B. subtilis
was found to prevent the decrease in the activity of Na
+
, K
+
-ATPase and Ca
2+
, Mg
2+
-ATPase, as well as the increase in EB and D-lactic acid concentration and inflammation induced by
A. hydrophila
in grass carp. Compared with
A. hydrophila
groups,
B. subtilis
safeguarded the integrity of intestinal villi and tight junction structure and restrained
A. hydrophila
-induced down-regulation of TJ proteins zonula occludens-1 (ZO-1) and occludin.
B. subtilis
also restrained up-regulation of TJ protein claudin b, pro-inflammation cytokine tumour necrosis factor α (TNF-α), cytokine interleukin 8 (IL-8), IL-1β, and adaptor protein myeloid differentiation factor 88 (MyD88) mRNA levels. Thus, oral intubation of
B. subtilis
could reduce
A. hydrophila
-induced intestinal mucosal barrier function damage and inflammation.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 38
/ 38/39
/ Adenosine Triphosphatases - metabolism
/ Aeromonas hydrophila - physiology
/ Animals
/ Bacillus subtilis - physiology
/ Calcium
/ Fish
/ Fish Diseases - microbiology
/ Humanities and Social Sciences
/ Immunity, Mucosal - genetics
/ Intestinal Mucosa - metabolism
/ Intestinal Mucosa - microbiology
/ Intestinal Mucosa - pathology
/ Intestinal Mucosa - ultrastructure
/ Mucosa
/ Proteins
/ Science
/ Tight Junctions - metabolism
/ Tight Junctions - microbiology
/ Tight Junctions - ultrastructure
/ Tumors
