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08:05
A Procedure to Study Stress-Induced Relapse of Heroin Seeking after Punishment-Imposed Abstinence
Published on: March 23, 2022
Serum cortisol secretion during heroin abstinence is elevated only nocturnally
Su-xia Li1, Jing Li, David H Epstein
1National Institute on Drug Dependence, Peking University, Beijing, China.
The American Journal of Drug and Alcohol Abuse
|April 23, 2008
Summary
Protracted opiate withdrawal disrupts the body's natural cortisol rhythm. Heroin-dependent individuals showed elevated nocturnal cortisol levels 10-15 days after stopping, indicating a loss of diurnal variation.
Area of Science:
- Neuroendocrinology
- Addiction Medicine
- Psychopharmacology
Background:
- The hypothalamic-pituitary-adrenal (HPA) axis is implicated in acute opiate withdrawal.
- Protracted withdrawal effects on the HPA axis remain understudied.
- Heroin dependence can lead to long-term physiological changes.
Purpose of the Study:
- To investigate the 24-hour pattern of plasma cortisol levels in individuals with protracted heroin abstinence.
- To compare HPA axis activity during protracted withdrawal to healthy controls.
- To determine if diurnal cortisol variation is altered in abstinent heroin users.
Main Methods:
- Collected plasma samples every 3 hours over a 24-hour period from heroin-dependent individuals abstinent for 10-15 days and matched healthy controls.
- Assessed plasma cortisol levels using radioimmunoassay (RIA).
- Analyzed diurnal variation patterns in cortisol levels between groups.
Main Results:
- Significantly higher nocturnal plasma cortisol levels were observed in heroin-dependent individuals compared to controls.
- Abstinent heroin users exhibited a loss of normal diurnal cortisol variation.
- HPA axis dysregulation may persist beyond acute withdrawal phases.
Conclusions:
- Protracted heroin abstinence is associated with altered HPA axis function, specifically a loss of diurnal cortisol rhythm.
- These findings suggest persistent neuroendocrine changes following chronic opiate use.
- Further research is needed to understand the clinical implications of HPA axis abnormalities in protracted withdrawal.
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