Related Experiment Video
Updated: Feb 16, 2026

The Unpredictable Chronic Mild Stress Protocol for Inducing Anhedonia in Mice
Published on: October 24, 2018
The Psychoactive Agent Crocin Can Regulate Hypothalamic-Pituitary-Adrenal Axis Activity.
Sara Asalgoo1, Mahdi Tat2, Hedayat Sahraei3
1Behavioral Sciences Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
Crocin may help normalize the hypothalamic-pituitary-adrenal (HPA) axis in animal models of post-traumatic stress disorder (PTSD). This study found Crocin treatment reduced PTSD symptoms and regulated key stress-related gene expressions.
Area of Science:
- Neuroscience
- Pharmacology
- Endocrinology
Background:
- Post-traumatic stress disorder (PTSD) is linked to hypothalamic-pituitary-adrenal (HPA) axis dysfunction.
- The HPA axis is critical for the body's stress response.
Purpose of the Study:
- To investigate Crocin's potential to normalize HPA axis activity in an animal model of PTSD.
- To assess Crocin's effects on PTSD-related behaviors and molecular markers.
Main Methods:
- An animal model of PTSD was induced using electric foot shock.
- Rats were treated with Crocin before and during stress exposure.
- Behavioral tests, plasma corticosterone measurements, and gene expression analysis (CRH, GluR, AVP) were performed.
Main Results:
- Crocin treatment attenuated PTSD-like behaviors, including freezing.
- Significant alterations in corticotrophin-releasing hormone (CRH) and glucocorticoid receptor (GluR) gene expression were observed.
- Plasma corticosterone levels were modulated by Crocin treatment.
Conclusions:
- Crocin demonstrates a regulatory effect on HPA axis activity in the context of PTSD.
- These findings suggest Crocin as a potential therapeutic agent for individuals experiencing traumatic events.
Related Concept Videos
Hypothalamic-Pituitary Axis
Physiological Foundation of Stress
Role of the Sympathetic Nervous System
Adrenaline triggers the...
Hormones of the Adrenal Glands
The adrenal cortex, a powerhouse of hormone synthesis, generates over two dozen corticosteroid hormones. The zona glomerulosa produces mineralocorticoids, exemplified by aldosterone, influencing the electrolyte composition of body fluids. The synthesis of glucocorticoids such as cortisol and...
CNS Stimulants: Cocaine, Amphetamines and Cannabinoids
GPCRs Regulate Adenylyl Cylase Activity
An Overview of Psychoactive Drugs
Stimulants such as cocaine, amphetamines, and nicotine enhance brain activity, leading to increased alertness, attention, and energy. These drugs typically raise heart rate, blood pressure, and body temperature. While they can induce feelings of euphoria, their misuse can result in severe health...

