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Carnosine: an endogenous neuroprotector in the ischemic brain.
S L Stvolinsky1, M L Kukley, D Dobrota
1Institute of Neurology, Russian Academy of Medical Sciences, Moscow, Russia.
Cellular and Molecular Neurobiology
|March 18, 1999
Summary
Carnosine, a natural neuropeptide, protects the brain by reducing harmful reactive oxygen species (ROS) and lipid peroxidation. It acts as a neuroprotector during brain ischemia, aiding recovery and maintaining neuronal homeostasis.
Area of Science:
- Neuroscience
- Biochemistry
- Cellular Biology
Background:
- Reactive oxygen species (ROS) contribute to pathological conditions.
- Carnosine is a naturally occurring hydrophilic neuropeptide with known biological functions.
Purpose of the Study:
- To review the biological effects of carnosine on pathological ROS generation.
- To elucidate carnosine's direct and indirect mechanisms in regulating oxidative stress and metabolism.
- To assess carnosine's neuroprotective role during brain ischemia.
Main Methods:
- In vitro experiments to observe direct antioxidant actions.
- Analysis of carnosine's indirect effects on metabolic pathways, including ROS turnover and lipid peroxidation (LPO).
- Evaluation of carnosine's efficacy in a rodent model of brain ischemia, monitoring cerebral blood flow, EEG, lactate levels, and enzymatic activity.
Main Results:
- Carnosine demonstrated direct antioxidant activity in vitro.
- Indirect metabolic effects include regulation of ROS turnover and LPO processes.
- In brain ischemia, carnosine improved cerebral blood flow, normalized EEG, reduced lactate, and provided enzymatic protection against ROS.
Conclusions:
- Carnosine exhibits significant neuroprotective properties during brain ischemia.
- It acts as a specific regulator of neuronal metabolic pathways, supporting brain homeostasis.
- Carnosine's multifaceted antioxidant and metabolic regulatory functions are crucial for neuronal health under stress.