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Published on: May 16, 2019
GABAergic transmission in hepatic encephalopathy
1Department of Neurophysiology, Medical Faculty, Heinrich-Heine-University, D-40225 Düsseldorf, Germany. olga.sergeeva@uni-duesseldorf.de
Archives of Biochemistry and Biophysics
|April 30, 2013
Summary
Hepatic encephalopathy (HE) involves increased GABAergic tone, impacting brain function. Understanding GABAergic transmission in HE offers new therapeutic targets for liver failure patients.
Area of Science:
- Neuroscience
- Gastroenterology
- Pharmacology
Background:
- Hepatic encephalopathy (HE) is a neuropsychiatric disorder linked to liver failure.
- A long-standing hypothesis suggests increased GABAergic tone contributes to HE neuropathology.
- Recent advancements illuminate GABA's role in health and disease, yet HE-specific GABAergic pathology remains unclear.
Purpose of the Study:
- To analyze neuronal populations and GABAergic afferents affected in HE.
- To discuss the complexity of GABAergic interneurons and GABAAR subtypes in HE.
- To explore the mechanisms of GABAAR modulators in HE pathophysiology.
Main Methods:
- Review of molecular pharmacology and biochemistry of GABAA-receptors (GABAAR).
- Analysis of GABAergic transmission physiology in the context of HE.
- Discussion of various GABAAR agonists, positive modulators, and inhibitors.
Main Results:
- The complexity of brain circuitry and diverse GABAAR subtypes hinder HE pathology understanding.
- Mechanisms of action for GABAAR agonists (e.g., taurine), modulators (e.g., neurosteroids, benzodiazepines), and inhibitors are discussed.
- Specific neuronal populations and GABAergic afferents impacted by HE require detailed investigation.
Conclusions:
- Understanding GABAergic transmission is crucial for HE pathophysiology.
- GABAAR modulators show potential for symptomatic treatment of HE.
- Further research into specific neuronal circuits and GABAAR subtypes is needed for targeted therapies.
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