Narcolepsy in the pediatric population
Erick N Viorritto1, Suraiya A Kureshi, Judith A Owens
1Department of Neurology, Children's National Medical Center, 111 Michigan Avenue NW, Washington, DC 20010, USA. eviorrit@childrensnational.org
Current Neurology and Neuroscience Reports
|January 4, 2012
Summary
Narcolepsy, a sleep disorder causing daytime sleepiness, may have an autoimmune cause. Diagnosing and treating narcolepsy in children presents unique challenges, requiring further research for effective therapies.
Area of Science:
- Neurology
- Immunology
- Sleep Medicine
Background:
- Narcolepsy is a chronic neurological disorder characterized by excessive daytime sleepiness and often accompanied by cataplexy, sleep paralysis, and hallucinations.
- The condition is strongly linked to the HLA DQB1*0602 allele and the destruction of hypocretin-secreting neurons in the hypothalamus.
- Emerging evidence, including autoantibodies to Tribbles homologue 2 and associations with H1N1 vaccination, suggests an autoimmune basis for narcolepsy.
Purpose of the Study:
- To review the current understanding of narcolepsy's pathophysiology, diagnosis, and treatment, with a focus on challenges in pediatric cases.
- To highlight the complexities in diagnosing narcolepsy in children, including interpreting sleep study results.
- To discuss the limitations of current diagnostic tools and the need for improved therapeutic strategies.
Main Methods:
- Review of existing literature on narcolepsy pathophysiology, genetics, and clinical manifestations.
- Analysis of diagnostic challenges, particularly in the pediatric population.
- Evaluation of current treatment approaches and their extrapolation from adult studies.
Main Results:
- Narcolepsy is associated with specific HLA alleles and hypocretin neuron loss, with growing evidence for autoimmune mechanisms.
- Diagnosing pediatric narcolepsy is complicated by difficulties in interpreting polysomnography and multiple sleep latency tests.
- Current diagnostic methods like HLA testing and cerebrospinal fluid hypocretin level measurement have limitations; neuroimaging is not yet established as useful.
Conclusions:
- The autoimmune hypothesis for narcolepsy is supported by recent findings, necessitating further investigation into underlying mechanisms.
- Pediatric narcolepsy diagnosis and treatment require careful consideration and extrapolation from adult data due to specific challenges.
- Advancements in understanding narcolepsy's pathophysiology are crucial for developing targeted therapeutics to manage symptoms and alter disease progression.
Related Concept Videos
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.
01:24Sleep-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:
01:15REM 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.
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01:26Pharmacokinetics in Pediatric Patients: Drug Excretion
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01:19Management of Insomnia
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