Abstract:
BACKGROUND:The mucosa-associated microbiota appears to be highly relevant to host-microbe interactions in the gastrointestinal (GI) tract. Thus, precise characterisation of the mucosa-associated microbiota may provide important insights for diagnostic and therapeutic development. However, for technical reasons, mucosal biopsies taken during standard endoscopic procedures are potentially contaminated by GI luminal contents. AIM:To develop and validate a biopsy device that minimises contamination during sampling of the mucosa-associated microbiota. METHODS:A new, encased biopsy forceps was developed, the Brisbane Aseptic Biopsy Device (BABD). This comprises sterile forceps encased by a sheath with a plug at the tip, allowing targeted, aseptic sampling of the mucosa. Matched duodenal biopsies were obtained using the BABD, standard biopsy forceps, and a sterile brush, from patients undergoing upper GI endoscopy for iron deficiency (n = 6). Total genomic deoxyribonucleic acid (gDNA) was extracted from samples and bacterial 16S rRNA gene libraries sequenced to investigate the mucosa-associated microbiota. RESULTS:Microbial DNA was recovered from biopsies obtained by the BABD, confirming the presence of a duodenal mucosa-associated microbiota. This microbiota was dominated by the genus Streptococcus, with lower levels of Prevotella, Veillonella and Neisseria. At the individual patient level, substantial differences were observed between matched samples obtained using the different devices. A greater degree of bacterial diversity was observed in samples collected using the standard forceps, indicating the BABD affords collection of samples more representative of the mucosa-associated microbiota, by precluding luminal cross-contamination. CONCLUSIONS:Cross-contamination can occur when mucosal biopsies are taken during standard endoscopic procedures. Utilising the novel Brisbane Aseptic Biopsy Device can reduce cross-contamination, and it offers improved opportunities to more precisely examine host-mucosa-associated microbiota interactions.
journal_name
Aliment Pharmacol Therjournal_title
Alimentary pharmacology & therapeuticsauthors
Shanahan ER,Zhong L,Talley NJ,Morrison M,Holtmann Gdoi
10.1111/apt.13622subject
Has Abstractpub_date
2016-06-01 00:00:00pages
1186-96issue
11eissn
0269-2813issn
1365-2036journal_volume
43pub_type
杂志文章abstract:BACKGROUND:Irritable bowel syndrome (IBS) and functional dyspepsia (FD) are common functional disorders without defined pathology. Mast cells and eosinophils interact with T lymphocytes and may alter enteric nerve and smooth muscle function. AIM:To examine mast cell, eosinophil and intraepithelial lymphocyte populatio...
journal_title:Alimentary pharmacology & therapeutics
pub_type: 杂志文章
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journal_title:Alimentary pharmacology & therapeutics
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journal_title:Alimentary pharmacology & therapeutics
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1111/j.1365-2036.1994.tb00163.x
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abstract:BACKGROUND:(13)CO(2) is produced on metabolism of (13)C-labelled-pantoprazole ([(13)C]-pantoprazole) by CYP2C19. AIM:To investigate whether the [(13)C]-pantoprazole breath test can predict CYP2C19 status and efficacy of proton pump inhibitors (PPIs) in Japanese. METHODS:We classified 110 healthy volunteers as rapid m...
journal_title:Alimentary pharmacology & therapeutics
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journal_title:Alimentary pharmacology & therapeutics
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
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journal_title:Alimentary pharmacology & therapeutics
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journal_title:Alimentary pharmacology & therapeutics
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journal_title:Alimentary pharmacology & therapeutics
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journal_title:Alimentary pharmacology & therapeutics
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2009-10-15 00:00:00
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更新日期:2019-12-01 00:00:00
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