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Updated: Aug 21, 2026

A Procedure to Study Stress-Induced Relapse of Heroin Seeking after Punishment-Imposed Abstinence
Published on: March 23, 2022
HLDF-6 peptide relieves symptoms of abstinence syndrome during experimental opium abuse
S V Litvinova1, A L Kalyuzhnyi, V V Aristova
1Department of Higher Nervous Activity, Biological Faculty, M. V. Lomonosov Moscow State University.
Abstract:
Experiments were performed on rats with opium abuse induced by chronic administration of morphine in increasing doses. We studied the effect of HLDF-6 peptide on symptoms of naloxone abstinence. Repeated administration of HLDF-6 peptide in a dose of 0.2 mg/kg 24 and 0.5 h before naloxone relieved the major symptoms of the abstinence syndrome. A possible neurochemical mechanism underlying the effect of HLDF-6 peptide is inhibition of enkephalinase A in structures of the endogenous antinociceptive system.
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