TY - JOUR
T1 - -Bacillus clausii effect on gene expression pattern in small bowel mucosa using DNA microarray analysis
AU - Di Caro, Simona
AU - Tao, H
AU - Grillo, Antonino
AU - Franceschi, Francesco
AU - Elia, C
AU - Zocco, Maria Assunta
AU - Gasbarrini, Giovanni Battista
AU - Sepulveda, Ar
AU - Gasbarrini, Antonio
PY - 2005
Y1 - 2005
N2 - Abstract
BACKGROUND:
Probiotics are widely used for the cure or prevention of several clinical conditions. However, clinical decisions need to be substantiated by an analysis of the complex bacteria-host interplay in the intestinal lumen.
AIMS:
To identify the gene expression pattern induced by Bacillus clausii in the intestinal mucosa of healthy individuals.
METHODS:
Six male patients (mean age 38+/-5 years) affected by endoscopically confirmed mild oesophagitis were treated for one month with esomeprazole, and were randomly selected to receive or not B. clausii (groups I and II, respectively). Duodenal biopsies were taken pre and post-treatment to identify the modification of gene expression, using the GeneChip Human U133A array. To validate the microarray analysis, real-time reverse transcriptase-polymerase chain reaction (PCR) of five target genes was performed.
RESULTS:
After B. clausii administration, a total of 158 and 265 genes were up and downregulated, respectively. Quantitative PCR confirmed the microarray data. B. clausii mainly affected the expression of genes involved in immune response and inflammation, apoptosis and cell growth, cell differentiation, cell-cell signalling, cell adhesion, signal transcription and transduction.
CONCLUSIONS:
Our data represent the first global analysis of B. clausii effects on the gene expression profile in normal intestine, and provide the basis to identify the mechanisms by which these agents interact with the host and exert their beneficial effects. Future studies are needed to clarify the B. clausii-induced gene pattern in the clinical disorders in which probiotics have proved to be effective.
AB - Abstract
BACKGROUND:
Probiotics are widely used for the cure or prevention of several clinical conditions. However, clinical decisions need to be substantiated by an analysis of the complex bacteria-host interplay in the intestinal lumen.
AIMS:
To identify the gene expression pattern induced by Bacillus clausii in the intestinal mucosa of healthy individuals.
METHODS:
Six male patients (mean age 38+/-5 years) affected by endoscopically confirmed mild oesophagitis were treated for one month with esomeprazole, and were randomly selected to receive or not B. clausii (groups I and II, respectively). Duodenal biopsies were taken pre and post-treatment to identify the modification of gene expression, using the GeneChip Human U133A array. To validate the microarray analysis, real-time reverse transcriptase-polymerase chain reaction (PCR) of five target genes was performed.
RESULTS:
After B. clausii administration, a total of 158 and 265 genes were up and downregulated, respectively. Quantitative PCR confirmed the microarray data. B. clausii mainly affected the expression of genes involved in immune response and inflammation, apoptosis and cell growth, cell differentiation, cell-cell signalling, cell adhesion, signal transcription and transduction.
CONCLUSIONS:
Our data represent the first global analysis of B. clausii effects on the gene expression profile in normal intestine, and provide the basis to identify the mechanisms by which these agents interact with the host and exert their beneficial effects. Future studies are needed to clarify the B. clausii-induced gene pattern in the clinical disorders in which probiotics have proved to be effective.
KW - Bacillus clausii
KW - Bacillus clausii
UR - http://hdl.handle.net/10807/21086
M3 - Article
SN - 0954-691X
SP - 951
EP - 960
JO - EUROPEAN JOURNAL OF GASTROENTEROLOGY & HEPATOLOGY
JF - EUROPEAN JOURNAL OF GASTROENTEROLOGY & HEPATOLOGY
ER -