Related Experiment Video
Updated: Jul 16, 2026
07:38
Generating Acute and Chronic Experimental Models of Motor Tic Expression in Rats
Published on: May 27, 2021
Oxytocin promotes socially triggered cataplexy
Carrie E Mahoney1, Roberto De Luca2, Adam A Joyal2
1Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA. cmahone6@bidmc.harvard.edu.
Nature Neuroscience
|July 14, 2026
Summary
Oxytocin promotes cataplexy, a muscle weakness in narcolepsy, especially during social interactions. Targeting the oxytocin-amygdala pathway may offer new narcolepsy treatments.
Area of Science:
- Neuroscience
- Sleep Medicine
- Endocrinology
Background:
- Narcolepsy is characterized by cataplexy, sudden muscle weakness often triggered by positive emotions.
- Cataplexy predominantly occurs during social interactions, suggesting a role for social stimuli.
Purpose of the Study:
- To investigate the role of the prosocial neuropeptide oxytocin in promoting cataplexy.
- To explore the neural pathways involved in oxytocin-mediated cataplexy.
Main Methods:
- Utilized a mouse model of narcolepsy.
- Administered oxytocin antagonists and employed chemo- and optogenetic manipulations.
- Monitored oxytocin levels and neuronal activity in the central amygdala.
Main Results:
- Social reunification triggered cataplexy; an oxytocin antagonist blocked these episodes.
- Increased oxytocin tone and central amygdala neuron activity preceded social-stimulus-induced cataplexy.
- Oxytocin-responsive neurons in the central amygdala were shown to drive cataplexy by inhibiting muscle-suppressing brainstem neurons.
- Rewarding stimuli like chocolate also activated this pathway and induced cataplexy.
Conclusions:
- Oxytocin acts via the central amygdala to promote cataplexy in response to social and other rewarding stimuli.
- This pathway represents a potential therapeutic target for treating cataplexy in narcolepsy.
Related Concept Videos
01:31Neurotransmitters
Neurotransmitters are essential chemical messengers within the nervous system, facilitating the communication between neurons. These chemical messengers, varying in function and effect, are critical for sustaining various aspects of neurological health and emotional well-being.
01:13Nonconscious Mimicry
Nonconscious mimicry occurs when individuals alter their mannerisms to match the behaviors and expressions of those nearby, without intention.
01:16Sympathetic Activation
The sympathetic division can influence tissues and organs by releasing norepinephrine at peripheral synapses and distributing epinephrine and norepinephrine through the bloodstream. In times of crisis or stress, sympathetic activation occurs, which is regulated by sympathetic centers in the hypothalamus. As a result, sympathetic activation prepares the body for physical exertion, rapid ATP production, and heightened alertness, allowing individuals to respond effectively to challenging or...
01:22Pathophysiology of Vomiting
Vomiting is a complex physiological response to expel harmful or irritating substances from the body. It's a defensive mechanism triggered by stimuli like poisons, microbial toxins, cytotoxic drugs, and mechanical abdominal distension. The process is centrally coordinated by the vomiting (or emetic) center located in the medulla of the brainstem. This area, rich in muscarinic M1, histamine H1, neurokinin 1 (NK1), and serotonin 5-HT3 receptors, coordinates the act of vomiting through interaction...
01:37Hypothalamic-Pituitary Axis
The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
01:07Narcolepsy
Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.