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Updated: Sep 30, 2026
Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins
Published on: August 15, 2017
Cerebral energy state of neonatal rats during seizures induced by homocysteine
1Institute of Physiology, Czech Academy of Sciences, Prague.
Insights
The immature rat brain compensates for seizure energy demands by increasing anaerobic glycolysis, leading to lactate accumulation. This suggests enhanced energy production despite modest changes in glucose and glycogen.
Area of Science:
- Neuroscience
- Biochemistry
- Pediatric Neurology
Background:
- Seizures in immature brains present unique metabolic challenges.
- Understanding energy metabolism during seizures is crucial for developing therapeutic strategies.
Purpose of the Study:
- To investigate the cerebral cortex energy metabolism in 7-day-old rats during DL-homocysteine thiolactone-induced seizures.
- To determine the brain's compensatory mechanisms for energy expenditure during seizure activity.
Main Methods:
- Induction of seizures in 7-day-old rats using DL-homocysteine thiolactone.
- Measurement of phosphocreatine (PCr), ATP, glucose, glycogen, and lactate levels in the cerebral cortex at various seizure intervals.
Main Results:
- Unchanged ATP levels and a mild decline in phosphocreatine (PCr) were observed.
- Pronounced lactate accumulation occurred with modest changes in brain glucose and glycogen.
- These metabolic changes suggest increased anaerobic glycolysis to meet energy demands.
Conclusions:
- The immature rat brain effectively compensates for seizure-induced energy expenditure through enhanced anaerobic glycolysis.
- Increased energy production, primarily via glycolysis, appears to be a key adaptive response in the developing brain during seizures.
- Further research is needed to ascertain if these findings apply to other brain regions, such as subcortical structures.
Abstract:
Seizures were induced in 7-day-old rats by intraperitoneal injection of DL-homocysteine thiolactone. Phosphocreatine (PCr), ATP, glucose, glycogen and lactate were determined in the cerebral cortex during various intervals after injection, corresponding to the early, as well as long periods of seizure activity. The unchanged levels of ATP, a very mild PCr decline and a pronounced accumulation of lactate (in the face of modest changes in brain glucose and glycogen) were observed. These results suggest that the immature rat brain is able to compensate energy expenditure associated with seizure activity by increased energy production, mainly due to increased anaerobic glycolysis. It remains to be determined whether a similar conclusion is also valid for other brain regions, e.g. subcortical structures.
