Title:The Role of the Endocannabinoid System in Eating Disorders: Neurochemical and Behavioural Preclinical Evidence
Volume: 20
Issue: 13
Author(s): Maria Scherma, Liana Fattore, Maria Paola Castelli, Walter Fratta and Paola Fadda
Affiliation:
Keywords:
Endocannabinoid system, CB1 receptors, food intake, eating disorders, anorexia nervosa, bulimia nervosa, binge eating disorder,
obesity.
Abstract: The endocannabinoid system has long been known as a modulator of several physiological functions, among which the homeostatic
and hedonic aspects of eating. CB1 receptors are widely expressed in brain regions that control food intake, reward and energy
balance. Animal and human studies indicate that CB1 receptor agonists possess orexigenic effects enhancing appetite and increasing the
rewarding value of food. Conversely, CB1 antagonists have been shown to inhibit the intake of food.
Eating disorders include a range of chronic and disabling related pathological illnesses that are characterized by aberrant patterns of feeding
behaviour and weight regulation, and by abnormal attitudes and perceptions toward body shape image. The psychological and biological
factors underlying eating disorders are complex and not yet completely understood. However in the last decades, converging evidence
have led to hypothesise a link between defects in the endocannabinoid system and eating disorders, including obesity. Here we review
the neurochemical and behavioural preclinical evidence supporting the role of the endocannabinoid system in eating disorders to offer
the reader an update regarding the state of the art. Despite the recent withdrawal from the market of rimonabant for treating obesity
and overweight individuals with metabolic complications due to its psychiatric side effects, preclinical findings support the rationale for
the clinical development of drug which modulate the endocannabinoid system in the treatment of eating disorders.
