Probiotic Bifidobacterium species stimulate human SLC26A3 gene function and expression in intestinal epithelial cells
| Autor: | Shubha Priyamvada, Ravinder K. Gill, Pradeep K. Dudeja, Alip Borthakur, Anoop Kumar, Anas Alakkam, Waddah A. Alrefai, Cameron Hecht, Arivarasu Natarajan Anbazhagan |
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| Rok vydání: | 2014 |
| Předmět: |
Bifidobacterium species
Time Factors Transcription Genetic Adenoma Physiology SLC26A3 Biology Transfection digestive system Antiporters Microbiology law.invention Probiotic Chlorides law medicine Animals Humans Chloride-Bicarbonate Antiporters RNA Messenger Intestinal Mucosa Extracellular Signal-Regulated MAP Kinases Promoter Regions Genetic Protein Kinase Inhibitors Gene Nucleic Acid Synthesis Inhibitors Probiotics Epithelial Cells Editorial Focus Cell Biology medicine.disease Up-Regulation Cell biology Mice Inbred C57BL Bicarbonates Sulfate Transporters biology.protein Bifidobacterium Caco-2 Cells HT29 Cells Function (biology) Signal Transduction |
| Zdroj: | American Journal of Physiology-Cell Physiology. 307:C1084-C1092 |
| ISSN: | 1522-1563 0363-6143 |
| Popis: | SLC26A3, or downregulated in adenoma (DRA), plays a major role in mediating Cl− absorption in the mammalian intestine. Disturbances in DRA function and expression have been implicated in intestinal disorders such as congenital Cl− diarrhea and gut inflammation. We previously showed that an increase in DRA function and expression by Lactobacillus acidophilus and its culture supernatant (CS) might underlie antidiarrheal effects of this probiotic strain. However, the effects of Bifidobacterium species, important inhabitants of the human colon, on intestinal Cl−/HCO3− exchange activity are not known. Our current results demonstrate that CS derived from Bifidobacterium breve, Bifidobacterium infantis, and Bifidobacterium bifidum increased anion exchange activity in Caco-2 cells (∼1.8- to 2.4-fold). Consistent with the increase in DRA function, CS also increased the protein, as well as the mRNA, level of DRA (but not putative anion transporter 1). CS of all three Bifidobacterium sp. increased DRA promoter activity (−1,183/+114 bp) in Caco-2 cells (1.5- to 1.8-fold). Furthermore, the increase in DRA mRNA expression by CS of B. breve and B. infantis was blocked in the presence of the transcription inhibitor actinomycin D (5 μM) and the ERK1/2 MAPK pathway inhibitor U0126 (10 μM). Administration of live B. breve, B. infantis, and B. bifidum by oral gavage to mice for 24 h increased DRA mRNA and protein levels in the colon. These data demonstrate an upregulation of DRA via activation of the ERK1/2 pathway that may underlie potential antidiarrheal effects of Bifidobacterium sp. |
| Databáze: | OpenAIRE |
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