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Juvenile Rats Show Altered Gut Microbiota After Exposure to Isoflurane as Neonates

  • Likuan WangEmail author
  • Xudong Yang
  • Haiyin Wu
Original Paper

Abstract

Inhaled anesthetic agents may be neurotoxic to the developing brain of a neonatal rodent. Isoflurane is a commonly used volatile anesthetic agent for maintenance of general anesthesia in various types of surgery. Neonatal exposure to isoflurane has been implicated in long-term neurocognitive dysfunction in children. The mechanisms of isoflurane-induced neurotoxicity have not been fully elucidated. Disruption of gut microbiota is currently attracting considerable interest as a vital pathogeny of some neurologic disorders. In the rat model, it is unknown whether neonatal exposure to isoflurane impacts the gut microbiota composition of juvenile animals. In the present study, postnatal 7-day-old male rats were exposed to 1 minimum alveolar concentration isoflurane for 4 h. Non-anesthetized rats served as controls. The fecal microbiomes of rats were observed using 16S RNA sequencing technique on postnatal day 42. Results indicated that composition of gut microbiota of isoflurane-exposed rats was different from controls. Several bacteria taxa in isoflurane-exposed rats were different from those of controls at various taxonomic levels. In particular, the abundance of Firmicutes, Proteobacteria, Clostridia, Clostridiales, and Lachnospiraceae were significantly increased in exposed rats and the abundance of Bacteroidetes, Actinobacteria, Bacteroidia and Bacteroidaceae were significantly decreased compared to controls. These results may offer new insights into the pathogenesis of isoflurane-induced neurotoxicity.

Keywords

Isoflurane Anesthetic neurotoxicity Gut–brain axis Gut microbiota 

Notes

Acknowledgements

This study was supported by the Science Foundation for Youth Scholars of Peking University School and Hospital of Stomatology (No. PKUSS20160109). The authors thank Dr. Liu Miao for her kind technical assistance with this project. We also thank Nissi S. Wang, M.Sc., for reviewing and editing of the manuscript.

Compliance with ethical standards

Conflict of interest

None of the authors has a conflict of interest to declare.

Supplementary material

11064_2018_2707_MOESM1_ESM.docx (48 kb)
Supplementary material 1 (DOCX 47 KB)

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of AnesthesiologyPeking University School and Hospital of StomatologyBeijingChina

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