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Smoking cessation induces profound changes in the composition of the intestinal microbiota in humans.

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2013
Author Biedermann Luc, Zeitz Jonas, Mwinyi Jessica, Sutter-Minder Eveline, Rehman Ateequr, Ott Stephan J, Steurer-Stey Claudia, Frei Anja, Frei Pascal, Scharl Michael, Loessner Martin J, Vavricka Stephan R, Fried Michael, Schreiber Stefan, Schuppler Markus, Rogler Gerhard,
Project The role of SLC transporters in autophagy and inflammatory bowel disease
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Original article (peer-reviewed)

Journal PloS one
Volume (Issue) 8(3)
Page(s) 59260 - 59260
Title of proceedings PloS one
DOI 10.1371/journal.pone.0059260


BACKGROUND The human intestinal microbiota is a crucial factor in the pathogenesis of various diseases, such as metabolic syndrome or inflammatory bowel disease (IBD). Yet, knowledge about the role of environmental factors such as smoking (which is known to influence theses aforementioned disease states) on the complex microbial composition is sparse. We aimed to investigate the role of smoking cessation on intestinal microbial composition in 10 healthy smoking subjects undergoing controlled smoking cessation. METHODS During the observational period of 9 weeks repetitive stool samples were collected. Based on abundance of 16S rRNA genes bacterial composition was analysed and compared to 10 control subjects (5 continuing smokers and 5 non-smokers) by means of Terminal Restriction Fragment Length Polymorphism analysis and high-throughput sequencing. RESULTS Profound shifts in the microbial composition after smoking cessation were observed with an increase of Firmicutes and Actinobacteria and a lower proportion of Bacteroidetes and Proteobacteria on the phylum level. In addition, after smoking cessation there was an increase in microbial diversity. CONCLUSIONS These results indicate that smoking is an environmental factor modulating the composition of human gut microbiota. The observed changes after smoking cessation revealed to be similar to the previously reported differences in obese compared to lean humans and mice respectively, suggesting a potential pathogenetic link between weight gain and smoking cessation. In addition they give rise to a potential association of smoking status and the course of IBD.