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Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
Published on: November 20, 2015
NUFIP1-engineered exosomes modulate propofol-induced neurotoxicity in neonatal rats via the ERS apoptotic pathway
Pengyue Zhao1, Yang Yan1, Bin Lan1
1Department of General Surgery, First Medical Center of the Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China.
Insights
Propofol anesthesia in early life may harm brain development. NUFIP1-engineered exosomes protect against propofol
Area of Science:
- Neuroscience
- Developmental Biology
- Pharmacology
Background:
- Early-life exposure to propofol (a general anesthetic) is linked to neurodevelopmental issues in children.
- The molecular mechanisms behind propofol's neurotoxicity are not fully understood.
- Previous research showed NUFIP1-engineered exosomes protect neonatal rat brains from propofol.
Purpose of the Study:
- To investigate the molecular mechanisms by which NUFIP1-engineered exosomes protect against propofol-induced neurotoxicity.
- To link this neuroprotection to the endoplasmic reticulum stress (ERS) apoptotic pathway.
Main Methods:
- Transcriptomic profiling to identify molecular pathways involved.
- Validation of key ERS and apoptosis markers.
- Pharmacological rescue experiments using Salubrinal to confirm pathway involvement.
Main Results:
- Transcriptomic analysis revealed the endoplasmic reticulum stress (ERS) apoptotic pathway is central to propofol's neurotoxicity.
- Key markers of ERS and apoptosis were directly validated.
- Salubrinal treatment rescued the neuroprotective effects, confirming the pathway's role.
Conclusions:
- NUFIP1-engineered exosomes mitigate propofol-induced nerve injury by regulating the ERS apoptotic pathway.
- This study offers novel mechanistic insights into preventing pediatric neurodevelopmental impairments caused by anesthetics.
Abstract:
Early-life exposure to general anesthetics, particularly propofol, elevates the risk of neurodevelopmental impairment and cognitive sequelae in pediatric populations, representing a pivotal concern in translational neuroanesthesiology. Although preclinical studies have linked propofol to increased developmental neurotoxicity, the underlying molecular mechanisms remain elusive. Our previous work established that nuclear fragile X mental retardation-interacting protein 1 (NUFIP1)-engineered exosomes from human umbilical cord mesenchymal stem cells could mitigate propofol-induced neurotoxicity and neuronal apoptosis in neonatal rats during a critical postnatal window of synaptogenesis (postnatal days 7-14). The present study provides the first mechanistic insights by performing transcriptomic profiling to link this neuroprotection to the endoplasmic reticulum stress (ERS) apoptotic pathway. Importantly, we directly validated key ERS/apoptosis markers and functionally confirmed the pathway's role through pharmacological rescue experiments with Salubrinal. In conclusion, NUFIP1-engineered exosomes regulate propofol-induced nerve injury through the ERS apoptotic pathway, offering novel mechanistic insights with potential implications for addressing pediatric neurodevelopmental impairments.
