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Epilepsy and Seizures: Overview01:24

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Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
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γ-aminobutyric acid or GABA, plays a pivotal role as an inhibitory neurotransmitter in the brain. GABA pathway potentiators, also known as GABAergic drugs, are a class of pharmaceutical agents designed to enhance the functioning of the GABAergic system. These medications primarily treat epilepsy, a neurological disorder characterized by recurrent seizures.
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Glutamate is a fundamental neurotransmitter in the central nervous system, playing a vital role in neuronal communication and various cognitive processes. Glutamate stands as the principal excitatory neurotransmitter in the brain. Its presence is crucial for the communication between neurons, underpinning essential processes such as synaptic transmission, neuronal excitability, and plasticity. These functions are vital for higher-order cognitive processes, including learning and memory. The...
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The gastrointestinal tract, responsible for the digestion and absorption of nutrients, is safeguarded by the intestinal barrier, which consists of secretory, physical, and immune components. At the forefront is the secretory barrier, composed of essential elements such as mucus, gut microbiota, and defense proteins. They collaborate to break down food particles, facilitate nutrient absorption, and maintain optimal gut health. These secretory components ensure the smooth functioning of the...
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Gut microbiota modulates seizure susceptibility.

Francesca Mengoni1, Valentina Salari1, Inna Kosenkova1

  • 1Section of Anatomy and Histology, Department of Neurosciences, Biomedicine, and Movement Science, School of Medicine, University of Verona, Verona, Italy.

Epilepsia
|July 29, 2021
PubMed
Summary

The gut microbiota influences epilepsy. Transplanting gut microbes from epileptic animals to healthy ones increased seizure susceptibility in recipients, supporting the gut-brain axis role in neurological disorders.

Keywords:
brain excitabilityepilepsyfecal microbiota transplantationmicrobiomepilocarpine model

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Area of Science:

  • Neuroscience
  • Microbiology
  • Gastroenterology

Background:

  • Growing evidence links gut microbiota to central nervous system diseases.
  • Observational studies show distinct gut microbial profiles in epilepsy patients versus healthy individuals.
  • The precise role of the gut microbiota in epilepsy pathogenesis via the gut-brain axis remains unclear.

Purpose of the Study:

  • To investigate the direct impact of gut microbiota transplantation from epileptic to healthy animals.
  • To determine if microbiota from epileptic animals can lower seizure thresholds in recipients.
  • To provide evidence for the gut-brain axis in epilepsy.

Main Methods:

  • Fecal microbiota transplantation from epileptic donor mice to healthy recipient mice.
  • Administration of a subclinical dose of pilocarpine to induce seizures.
  • Comparison of seizure susceptibility and threshold between recipient groups.

Main Results:

  • Mice receiving microbiota from epileptic donors exhibited increased susceptibility to seizures.
  • These recipients were more prone to developing status epilepticus after pilocarpine administration.
  • A lower seizure threshold was observed in mice with transplanted microbiota from epileptic animals.

Conclusions:

  • The study provides the first direct evidence that gut microbiota influences seizure susceptibility.
  • These findings support the hypothesis of the gut-brain axis in modulating neuronal excitability.
  • Gut microbiota may play a causative role in the pathogenesis of epilepsy.