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Updated: Jul 13, 2026

Lipidomics and Transcriptomics in Neurological Diseases
Published on: March 18, 2022
Plasma met-enkephalin, beta-endorphin and leu-enkephalin levels in human hepatic encephalopathy
1Department of Clinical Chemistry, Theodor Bilharz Research Institute, Egypt. kmlaila@yahoo.com
Abstract:
To address the role of the opioid system in the pathogenesis of hepatic encephalopathy (HE) we measured plasma met-enkephalin, beta-endorphin and leu-enkephalin in patients with different grades of HE compared to control subjects and patients with cirrhosis. Plasma met-enkephalin levels were significantly higher in patients with cirrhosis and all grades of HE than controls. Plasma beta-endorphin levels were similar in the 3 groups. Plasma leu-enkephalin levels were significantly higher in HE grades II, III and IV than in controls, patients with cirrhosis and HE grade I patients. Our results support data on the involvement of met-enkephalin and leu-enkephalin in the pathogenesis of HE and provide a rationale for the use of opioid receptor antagonists in the treatment of HE.
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