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Updated: Aug 21, 2026
The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia
Published on: November 19, 2008
Caffeic acid phenethyl ester prevents neonatal hypoxic-ischaemic brain injury
Xing Wei1, Liming Zhao, Zhizhong Ma
1Department of Neurology, School of Medicine, Indiana University, Indianapolis, IN 46202, USA.
Insights
Caffeic acid phenethyl ester (CAPE), a propolis component, protects neonatal rat brains from hypoxic-ischaemic injury. CAPE prevents brain damage by inhibiting inflammation and neuronal death pathways, offering a potential therapy for neonatal encephalopathy.
Area of Science:
- Neuroscience
- Biochemistry
- Pharmacology
Background:
- Neonatal hypoxic-ischaemic (HI) brain injury causes encephalopathy, leading to significant morbidity and mortality.
- Currently, no effective treatments exist for this condition.
Purpose of the Study:
- To investigate the neuroprotective potential of caffeic acid phenethyl ester (CAPE) against neonatal HI brain injury.
- To elucidate the mechanisms underlying CAPE's neuroprotective effects.
Main Methods:
- Administration of CAPE before or after HI insult in neonatal rats.
- Assessment of brain damage in cortex, hippocampus, and thalamus.
- Evaluation of caspase 3 activation, inducible nitric oxide synthase (iNOS), and caspase 1 expression.
- In vitro studies on nitric oxide-induced neurotoxicity and mitochondrial Ca2+-induced cytochrome c release.
Main Results:
- CAPE significantly prevented HI-induced brain damage in neonatal rats.
- CAPE inhibited HI-induced caspase 3 activation, iNOS, and caspase 1 expression in vivo.
- CAPE demonstrated potent inhibition of nitric oxide-induced neurotoxicity in vitro.
- CAPE directly inhibited Ca2+-induced cytochrome c release from isolated brain mitochondria.
Conclusions:
- CAPE exhibits significant neuroprotection against HI-induced neuronal death.
- CAPE's protective effects may involve blocking HI-induced inflammation and/or directly inhibiting neuronal death pathways.
- CAPE represents a potential novel therapeutic agent for preventing neonatal HI injury.
Abstract:
Neonatal hypoxic-ischaemic (HI) brain injury resulting in encephalopathy is a leading cause of morbidity and mortality with no effective treatment. Here we show that caffeic acid phenethyl ester (CAPE), an active component of propolis, administered either before or after an HI insult, significantly prevents HI-induced neonatal rat brain damage in the cortex, hippocampus and thalamus. In addition to blocking HI-induced caspase 3 activation, CAPE also inhibits HI-mediated expression of inducible nitric oxide synthase and caspase 1 in vivo and potently blocks nitric oxide-induced neurotoxicity in vitro. Furthermore, CAPE directly inhibits Ca2+-induced cytochrome c release from isolated brain mitochondria. Thus, CAPE induces neuroprotection against HI-induced neuronal death, possibly by blocking HI-induced inflammation and/or directly inhibiting the HI-induced neuronal death pathway. CAPE may therefore be a novel effective therapy for preventing neonatal HI injury.
