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Sevoflurane Exposure Induces Neuronal Cell Parthanatos Initiated by DNA Damage in the Developing Brain via an Increase of Intracellular Reactive Oxygen Species
- Source :
- Frontiers in Cellular Neuroscience, Frontiers in Cellular Neuroscience, Vol 14 (2020)
- Publication Year :
- 2020
- Publisher :
- Frontiers Media SA, 2020.
-
Abstract
- The safety of volatile anesthetics in infants and young children has been drawing increasing concern due to its potential neurotoxicity in the developing brain. Neuronal death is considered a major factor associated with developmental neurotoxicity after exposure to volatile anesthetics sevoflurane, but its mechanism remains elusive. Parthanatos, a new type of programmed cell death, resulting from poly (ADP-ribose) polymerase 1 (PARP-1) hyperactivation in response to DNA damage, was found to account for the pathogenesis of multiple neurological disorders. However, the role of Parthanatos in sevoflurane-induced neonatal neuronal cell death has not been investigated. To test it, neuronal cells treated with 2, 4, and 8% sevoflurane for 6, 12, and 24 h and postnatal day 7 rats exposed to 2.5% sevoflurane for 6 h were used in the present study. Our results found sevoflurane exposure induced neuronal cell death, which was accompanied by PARP-1 hyperactivation, cytoplasmic polymerized ADP-ribose (PAR) accumulation, mitochondrial depolarization, and apoptosis-inducing factor (AIF) nuclear translocation in the neuronal cells and hippocampi of rats. Pharmacological or genetic inhibition of PAPR-1 significantly alleviated sevoflurane-induced neuronal cell death and accumulation of PAR polymer and AIF nuclear translocation, which were consistent with the features of Parthanatos. We observed in vitro and in vivo that sevoflurane exposure resulted in DNA damage, given that 8-hydroxydeoxyguanosine (8-OHdG) and phosphorylation of histone variant H2AX (γH2AX) were improved. Moreover, we detected that sevoflurane exposure was associated with an overproduction of intracellular reactive oxygen species (ROS). Inhibition of ROS with antioxidant NAC markedly alleviated DNA damage caused by sevoflurane, indicating that ROS participated in the regulation of sevoflurane-induced DNA damage. Additionally, sevoflurane exposure resulted in upregulation of Parthanatos-related proteins and neuronal cell death, which were significantly attenuated by pretreatment with NAC. Therefore, these results suggest that sevoflurane exposure induces neuronal cell Parthanatos initiated by DNA damage in the developing brain via the increase of intracellular ROS.
- Subjects :
- 0301 basic medicine
Programmed cell death
DNA damage
Cell
sevoflurane
medicine.disease_cause
Sevoflurane
lcsh:RC321-571
03 medical and health sciences
Cellular and Molecular Neuroscience
0302 clinical medicine
Downregulation and upregulation
neurotoxicity
medicine
oxidative stress
lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry
Parthanatos
Original Research
Chemistry
Neurotoxicity
medicine.disease
Cell biology
developing brain
030104 developmental biology
medicine.anatomical_structure
030217 neurology & neurosurgery
Intracellular
Oxidative stress
Neuroscience
medicine.drug
Subjects
Details
- ISSN :
- 16625102
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- Frontiers in Cellular Neuroscience
- Accession number :
- edsair.doi.dedup.....22bfba5178da5e471467b72975880720