Cited by 202Gut microbiota and healthGastrointestinal motility and disordersProbiotics and Fermented Foods

The Gut Microbiota Predispose to the Pathophysiology of Acute Postradiotherapy Diarrhea

Manichanh, Chaysavanh, Varela, Encarna, Martinez, Cristina, Antolin, Maria, Llopis, Marta, Dor, Jol, Giralt, Jordi, Guarner, Francisco +1 more·2008·The American Journal of Gastroenterology

Abstract

INTRODUCTION: Severe diarrhea may complicate pelvic radiotherapy and force interruption of treatment. As there is no current clinical or experimental information on the role of the gut microbiota in this pathogenesis, we conducted a pilot observational study on the fecal microbiota in patients receiving pelvic radiotherapy. METHODS: The study involved 10 patients who underwent 5 wk of radiotherapy for abdominal tumors and 5 controls. Four fecal samples were collected from each individual: before, during, at the end, and 2 wk after treatment. Following the amplification of the bacterial 16S rRNA gene from the samples, DNA fingerprinting and cloning-sequencing techniques were used to determine their microbial profile and composition, respectively. RESULTS: Six patients suffered acute postradiotherapy diarrhea and 4 did not. In patients without diarrhea, as well as in healthy volunteers, microbial diversity was stable over a period of 7 wk. However, patients exhibiting diarrhea showed a progressive modification in their microbial diversity. A radical drop in similarity index was observed at the end (P= 0.026) and still 2 wk after radiotherapy (P= 0.014). Interestingly, cluster analysis of the microbial profile in the first sample (S1) (collected before radiotherapy) displayed a dendogram where patients that presented diarrhea clustered separately from those that did not develop diarrhea after radiotherapy. Moreover, sequence analysis of dominant bacteria in the S1 sample confirmed differences between the diarrhea and nondiarrhea groups. DISCUSSION: In this set of patients, susceptibility or protection against diarrhea after radiotherapy could be linked to different initial microbial colonization.

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Crossref · 10.1111/j.1572-0241.2008.01868.x

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Authors
Manichanh, C., Varela, E., Martinez, C., Antolin, M., Llopis, M., Dor, J., Giralt, J., Guarner, F., & Malagelada, J.-R.
Affiliations
  • Vall d'Hebron Hospital Universitari (ES)
  • Institut National de la Recherche Agronomique (FR)
Corresponding author
Manichanh, Chaysavanh
Venue
The American Journal of Gastroenterology
Published
2008-07
Volume
103
Issue
7
Pages
1754-1761
ISSN
  • 0002-9270 (ISSN-L)
  • 1572-0241
OpenAlex
W2078326955
Cited by
201
References
26
Citations by year
2026: 6 · 2025: 15 · 2024: 16 · 2023: 22 · 2022: 25 · 2021: 18 · 2020: 21 · 2019: 11 · 2018: 11 · 2017: 8 · 2016: 6 · 2015: 11 · 2014: 6 · 2013: 8 · 2012: 4
FWCI
1.64
Type
journal article
Language
en
Open access
closed
Locations
  • The American Journal of Gastroenterology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
Keywords
gut microbiota, pelvic radiotherapy, fecal microbiota composition, microbial diversity, 16S rRNA gene sequencing, bacterial colonization, abdominal tumors, radiation toxicity
MeSH terms
Abdominal Neoplasms, Aged, Diarrhea, DNA, Bacterial, Feces, Female, Gene Amplification, Humans, Intestines, Male, Middle Aged, Pelvis, Radiotherapy

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