Related Experiment Video
Updated: Jan 6, 2026
08:58
Minimizing Hypoxia in Hippocampal Slices from Adult and Aging Mice
Published on: July 2, 2020
8.3K
Immature murine hippocampal neurones do not develop long-term structural changes after a single isoflurane exposure
Dongyi Tong1, Christin M Godale2, Feni K Kadakia2
1Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, China; Department of Anesthesia, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
British Journal of Anaesthesia
|October 2, 2019
Summary
Isoflurane anesthesia did not harm developing mouse brain cells. Surviving granule cells integrated normally, showing no structural damage, but results may differ in other age groups.
Area of Science:
- Neuroscience
- Developmental Neuroscience
- Anesthesiology
Background:
- Anesthesia exposure in developing animals can cause neuronal death and alter brain structure.
- Isoflurane selectively induces apoptosis in approximately 10% of 2-week-old mouse hippocampal granule cells.
- This study investigated potential injury and abnormal brain integration in the surviving 90% of granule cells.
Purpose of the Study:
- To determine if a single, prolonged isoflurane exposure impacts the long-term structure and integration of developing hippocampal granule cells.
- To assess potential sex-based differences in the response to isoflurane exposure in this specific cell population.
Main Methods:
- Utilized a transgenic mouse model with fate-mapping to identify and label immature granule cells.
- Exposed male and female mice to isoflurane for 6 hours at 2 weeks of age.
- Quantified the morphology of fate-mapped granule cells two months post-exposure.
Main Results:
- No gross structural abnormalities were observed in the dentate gyrus following isoflurane treatment.
- Individual surviving granule cells showed no significant changes in spine density, spine type, dendrite length, or presynaptic axon terminal structure.
- While female mice exhibited larger granule cell axon terminals, this was independent of isoflurane exposure.
Conclusions:
- A single prolonged isoflurane exposure did not impair the integration of 2-week-old hippocampal granule cells, irrespective of sex.
- The findings suggest that this specific age cohort of cells is resilient to the anesthetic.
- Caution is advised against extrapolating these results to other developmental age groups, which may exhibit different sensitivities.
