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Narcolepsy

Narcolepsy

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.

Sleep-Wake Cycles

Sleep-Wake Cycles

Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:

REM Sleep Behavior Disorder

REM Sleep Behavior Disorder

REM Sleep Behavior Disorder (RBD) is a sleep disorder characterized by the absence of muscle paralysis that normally occurs during the REM phase of sleep. This absence allows individuals to physically act out their dreams, which are often vivid and disturbing. Common behaviors exhibited during episodes include kicking, punching, and yelling. These actions can be dangerous, potentially leading to injuries for the person with RBD or their bed partner.
RBD is significantly associated with...

Restless Leg Syndrome and Night Terrors

Restless Leg Syndrome and Night Terrors

Restless Leg Syndrome (RLS), also known as Willis-Ekbom disease, is a neurological disorder characterized by an uncontrollable urge to move the legs due to uncomfortable sensations. These sensations typically occur during periods of rest or inactivity, particularly when lying down or sitting, and can severely disrupt sleep.
The exact cause of RLS is not fully understood, but it is believed to involve dopamine, a neurotransmitter that helps regulate muscle movement. Imbalances in dopamine levels...

Management of Insomnia

Management of Insomnia

The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...

NF-κB-dependent Signaling Pathway

NF-κB-dependent Signaling Pathway

The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...

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Experimental Approach to Examine Leptin Signaling in the Carotid Bodies and its Effects on Control of Breathing

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Elevated peripheral visfatin levels in narcoleptic patients.

Norbert Dahmen¹, Nina Manderscheid, Jana Helfrich

¹Department of Psychiatry, University of Mainz, Mainz, Germany.

|August 21, 2008

Summary

Visfatin levels are elevated in narcolepsy patients, particularly those with HLA DR2. This suggests immune system dysregulation may play a role in this sleep disorder.

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Area of Science:

Immunology
Sleep Medicine
Endocrinology

Background:

Narcolepsy is a severe sleep disorder linked to hypocretin neuron loss.
Visfatin, an inflammatory adipokine, is also known as pre-B-cell colony enhancing factor (PBEF).

Purpose of the Study:

To investigate if visfatin levels are altered in narcolepsy patients.
To explore the potential role of visfatin in narcolepsy pathophysiology.

Main Methods:

Analyzed 54 narcolepsy patients and 39 healthy controls.
Measured peripheral visfatin levels using an enzyme immunoassay.
Assessed narcolepsy symptoms via clinical interviews and the Stanford Center for Narcolepsy Sleep Inventory.

Main Results:

Circulating visfatin levels were significantly higher in narcoleptic patients compared to controls.
The increase in visfatin was particularly notable in HLA DR2 positive narcolepsy patients.

Conclusions:

Findings suggest altered immunological regulation in narcolepsy.
Visfatin may be a potential biomarker or therapeutic target in narcolepsy.