Abstract：
INTRODUCTION:To examine the immune-modulatory effects of probiotics during early infancy, Bifidobacterium breve M-16V (B. breve) was administered to rat pups during the newborn or weaning period, and the expression of inflammatory genes was investigated using a cDNA microarray and real-time PCR. RESULTS:After B. breve administration, significant increases in the numbers of Bifidobacterium in both the cecum and colon were confirmed during the newborn period. The numbers of upregulated and downregulated genes were greater during the weaning period than in the newborn period and were greatest in the colon, with fewer genes altered in the small intestine and the fewest in the spleen. The expression of inflammation-related genes, including lipoprotein lipase (Lpl), glutathione peroxidase 2 (Gpx2), and lipopolysaccharide-binding protein (Lbp), was significantly reduced in the colon during the newborn period. In weaning rat pups, the expression of CD3d, a cell surface receptor-linked signaling molecule, was significantly enhanced in the colon; however, the expression of co-stimulatory molecules was not enhanced. DISCUSSION:Our findings support a possible role for B. breve in mediating anti-inflammatory and antiallergic reactions by modulating the expression of inflammatory molecules during the newborn period and by regulating the expression of co-stimulatory molecules during the weaning period. METHODS:Gene expression in the intestine was investigated after feeding 5 × 10(8) cfu of B. breve every day to the F344/Du rat from days 1 to 14 (newborn group) and from days 21 to 34 (weaning group). mRNA was extracted from intestine, and the expression of inflammatory gene was analyzed by microarray and real-time PCR.
journal_name
Pediatr Resjournal_title
Pediatric researchauthors
Ohtsuka Y,Ikegami T,Izumi H,Namura M,Ikeda T,Ikuse T,Baba Y,Kudo T,Suzuki R,Shimizu Tdoi
10.1038/pr.2011.11subject
Has Abstractpub_date
2012-01-01 00:00:00pages
46-53issue
1eissn
0031-3998issn
1530-0447pii
pr201111journal_volume
71pub_type
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更新日期：2012-05-01 00:00:00
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pub_type： 杂志文章,meta分析
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pub_type： 临床试验,杂志文章
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更新日期：1996-08-01 00:00:00
