Analysis of 1135 gut metagenomes identifies sex-specific resistome profiles

Gut Microbes. 2019;10(3):358-366. doi: 10.1080/19490976.2018.1528822. Epub 2018 Oct 29.

Abstract

Several gastrointestinal diseases show a sex imbalance, although the underlying (patho)physiological mechanisms behind this are not well understood. The gut microbiome may be involved in this process, forming a complex interaction with host immune system, sex hormones, medication and other environmental factors. Here we performed sex-specific analyses of fecal microbiota composition in 1135 individuals from a population-based cohort. The overall gut microbiome composition of females and males was significantly different (p = 0.001), with females showing a greater microbial diversity (p = 0.009). After correcting for the effects of intrinsic factors, smoking, diet and medications, female hormonal factors such as the use of oral contraceptives and undergoing an ovariectomy were associated with microbial species and pathways. Females had a higher richness of antibiotic-resistance genes, with the most notable being resistance to the lincosamide nucleotidyltransferase (LNU) gene family. The higher abundance of resistance genes is consistent with the greater prescription of the Macrolide-Lincosamide-Streptogramin classes of antibiotics to females. Furthermore, we observed an increased resistance to aminoglycosides in females with self-reported irritable bowel syndrome. These results throw light upon the effects of common medications that are differentially prescribed between sexes and highlight the importance of sex-specific analysis when studying the gut microbiome and resistome.

Keywords: female hormonal factors; gut microbiome; gut resistome; sex differences.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Anti-Bacterial Agents / pharmacology*
  • Biodiversity*
  • Drug Resistance, Microbial / genetics*
  • Feces / microbiology
  • Female
  • Gastrointestinal Microbiome / genetics*
  • Genes, Bacterial / genetics
  • Humans
  • Irritable Bowel Syndrome / microbiology
  • Lincosamides / pharmacology
  • Male
  • Metagenome / genetics*
  • Middle Aged
  • Prospective Studies
  • Sex Factors
  • Young Adult

Substances

  • Anti-Bacterial Agents
  • Lincosamides

Grants and funding

C.W. holds a European Research Council (ERC) advanced grant (FP/2007-2013/ERC grant 2012-322698), a Netherlands Organization for Scientific Research (NWO) Spinoza prize (NWO SPI 92-266), and is partly supported by the Stiftelsen Kristian Gerhard Jebsen Foundation (Norway). A.Z. holds an ERC starting grant (715772), and NWO-VIDI grant 016.178.056. A.Z. and J.F. are funded by CardioVasculair Onderzoek Nederland (CVON 2012-03). J.F. and R.W. are funded by an NWO-VIDI grant 864.13.013 and ZonMW-VIDI grant 016.136.308, respectively. T.S and S.G hold scholarships from the Junior Scientific Masterclass, University of Groningen and the Graduate School of Medical Sciences, University of Groningen, respectively. The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript;European Research Council [715772];European Research Council [FP/2007-2013/ERC grant 2012-322698];Nederlandse Organisatie voor Wetenschappelijk Onderzoek [NWO SPI 92-266];Nederlandse Organisatie voor Wetenschappelijk Onderzoek [016.178.056];Nederlandse Organisatie voor Wetenschappelijk Onderzoek [864.13.013];Graduate School of Medical Sciences, University of Groningen. [None];Junior Scientific Masterclass, University of Groningen [None];Stiftelsen Kristian Gerhard Jebsen;ZonMw [016.136.308];