Related Experiment Video
Updated: Jun 15, 2026
06:23
A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice
Published on: September 22, 2020
IgG abnormality in narcolepsy and idiopathic hypersomnia
1Research on the Cause and Treatment of Sleep Disorders, Tokyo Institute of Psychiatry, Tokyo, Japan. stanaka@prit.go.jp
Plos One
|March 12, 2010
Summary
This study reveals altered serum IgG levels in narcolepsy and idiopathic hypersomnia, suggesting immune system involvement. Specific IgG subclass changes indicate distinct immunological profiles in these sleep disorders.
Area of Science:
- Immunology
- Neurology
- Sleep Medicine
Background:
- Narcolepsy is strongly associated with the HLA-DQB1*0602 allele, hinting at immune system involvement.
- Previous research suggests a potential autoimmune component in narcolepsy.
Purpose of the Study:
- To investigate serum immunoglobulin G (IgG) levels in patients with narcolepsy and idiopathic hypersomnia.
- To explore potential differences in humoral immunity between narcolepsy and idiopathic hypersomnia.
Main Methods:
- Serum total IgG and IgG subclass levels were measured in 159 Japanese narcolepsy-cataplexy patients (HLA-DQB1*0602 positive), 28 idiopathic hypersomnia patients, and 123 healthy controls.
- Statistical analysis was performed to compare IgG levels and subclass distributions among the groups.
- Clinical variables were assessed for association with IgG levels.
Main Results:
- Significant differences in serum IgG distribution were observed among healthy controls, narcolepsy patients, and idiopathic hypersomnia patients.
- Narcolepsy patients showed decreased IgG1 and IgG2, stable IgG3, and increased IgG4 proportions, regardless of total IgG levels.
- Idiopathic hypersomnia patients exhibited distinct IgG subclass patterns, including high IgG3/IgG4, low IgG2, and IgG1/IgG2 imbalance.
Conclusions:
- This study provides the first evidence of IgG abnormalities in narcolepsy and idiopathic hypersomnia.
- The findings indicate alterations in humoral immunity in these sleep disorders.
- Distinct IgG profiles suggest underlying immunological differences between narcolepsy and idiopathic hypersomnia.
Related Concept Videos
01:24Sleep-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:
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
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.
01:15REM 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...
RBD is significantly associated with...
01:19Management 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...
01:24Substance Use Disorders Affecting Sleep
Substance use disorders involve a pattern of using drugs more extensively than intended and continuing use despite harmful consequences. This includes legal substances like alcohol and nicotine, as well as illegal drugs. These disorders often involve both physical and psychological dependence, reflecting compulsive use of substances that significantly alter thoughts, feelings, and behaviors, contributing to a major public health issue.
Understanding the concepts of physical dependence,...
Understanding the concepts of physical dependence,...
01:11Alterations in Muscle Tone lll
Rigidity and myotonia are distinct abnormalities of muscle tone that affect resistance and relaxation during movement. Although both involve altered muscle contraction, they arise from different neurological and muscular mechanisms.CharacteristicsRigidity is characterized by uniform resistance to passive movement across the entire range, independent of speed, affecting flexors and extensors equally. It may appear as lead-pipe rigidity (smooth, constant resistance) or cogwheel rigidity...