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Menstrual Cycle Plays Important Role in Influencing Cocaine Craving

by Mohamed Fathima S on March 6, 2019 at 3:40 PM
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Menstrual Cycle Plays Important Role in Influencing Cocaine Craving

Addiction risk in women is influenced by the menstrual cycle, reveals new research published in Biological Psychiatry. Craving for cocaine was stronger during estrus, the phase when ovulation occurs, than during non-estrus in female rats. Moreover, female rats are more prone to relapse cocaine use than male rats.

This new link between menstrual cycle and drug craving may help explain differences between men and women in cocaine seeking and vulnerability to relapse after quitting.

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"Sex differences are extremely important in addiction. This new study suggests that the period around ovulation is the most vulnerable period for promoting addiction. This knowledge has implications for both prevention and treatment," said John Krystal, MD, Editor of Biological Psychiatry.

"To the degree that results from animal models generalize to humans, our findings implicate the phase of the menstrual cycle as a risk factor for relapse in women and, therefore, should be taken into consideration in the development of relapse prevention treatments," said senior author Satoshi Ikemoto, PhD, NIDA.
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To assess the influence of the menstrual cycle on addiction, first author Céline Nicolas, PhD, NIDA, and colleagues used a model of cocaine use in rats that mimics the intermittent binge-like pattern of human cocaine use. They compared this model with the standard rat model of cocaine use that provides continuous access to the drug. Although both access models led to progressively increased cocaine seeking during abstinence, referred to as incubation of cocaine craving, cocaine seeking was higher after intermittent access.

Regardless of the type of access provided to the rats, cocaine seeking was higher in female rats than male rats. "In female rats, the magnitude of cocaine craving was critically dependent on the phase of the estrous cycle, demonstrating a novel role of ovarian hormones in incubation of cocaine craving," said Dr. Ikemoto.

Previous studies in humans suggest that women relapse faster after quitting cocaine and have stronger craving than men. The new findings reveal that the estrous cycle may contribute to these differences between women and men and highlight a potential target to help prevent relapse in women.



Source: Eurekalert
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