(S)-Reutericyclin: Susceptibility Testing and In Vivo Effect on Murine Fecal Microbiome and Volatile Organic Compounds

International Journal of Molecular Sciences

Stefan Heinl¹  Sigrid Mayrhofer¹  Reingard Grabherr¹  Angela Horvath²  Vanessa Stadlbauer²  Beate Obermüller³  Christoph Castellani³  Holger Till³  Barbara Mittl³  Bernhard Kienesberger³  Georg Singer³  Wolfram Miekisch⁴  Patricia Fuchs⁴  Ingeborg Klymiuk⁵ 

[1] Department of Biotechnology, University of Natural Resources and Life Sciences Vienna, 1190 Vienna, Austria;Department of Internal Medicine, Division of Gastroenterology and Hepatology, Medical University of Graz, 8036 Graz, Austria;Department of Paediatric and Adolescent Surgery, Medical University of Graz, 8036 Graz, Austria;Experimental Research Center, Department of Anesthesiology and Intensive Care, Rostock University Medical Center, 18057 Rostock, Germany;Gottfried Schatz Research Center, Department of Cell Biology, Histology and Embryology, Medical University of Graz, 8036 Graz, Austria;

关键词: reutericyclin;    bacteriocin;    microbiome;    antimicrobial activity;    VOC;    isoform;   

DOI  :  10.3390/ijms22126424

来源: DOAJ

【 摘 要 】

We aimed to assess the in vitro antimicrobial activity and the in vivo effect on the murine fecal microbiome and volatile organic compound (VOC) profile of (S)-reutericyclin. The antimicrobial activity of (S)-reutericyclin was tested against Clostridium difficile, Listeria monocytogenes, Escherichia coli, Enterococcus faecium, Staphylococcus aureus, Staphylococcus (S.) epidermidis, Streptococcus agalactiae, Pseudomonas aeruginosa and Propionibacterium acnes. Reutericyclin or water were gavage fed to male BALBc mice for 7 weeks. Thereafter stool samples underwent 16S based microbiome analysis and VOC analysis by gas chromatography mass spectrometry (GC-MS). (S)-reutericyclin inhibited growth of S. epidermidis only. Oral (S)-reutericyclin treatment caused a trend towards reduced alpha diversity. Beta diversity was significantly influenced by reutericyclin. Linear discriminant analysis Effect Size (LEfSe) analysis showed an increase of Streptococcus and Muribaculum as well as a decrease of butyrate producing Ruminoclostridium, Roseburia and Eubacterium in the reutericyclin group. VOC analysis revealed significant increases of pentane and heptane and decreases of 2,3-butanedione and 2-heptanone in reutericyclin animals. The antimicrobial activity of (S)-reutericyclin differs from reports of (R)-reutericyclin with inhibitory effects on a multitude of Gram-positive bacteria reported in the literature. In vivo (S)-reutericyclin treatment led to a microbiome shift towards dysbiosis and distinct alterations of the fecal VOC profile.

【 授权许可】

Unknown