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Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
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ALS - Motor Neuron Disease: Mechanism and Development of New Therapies
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[Kleine-Levin syndrome].

Riva Tauman1, Michal Greenfeld, Yakov Sivan

  • 1Pediatric Sleep Disorders Center, Department of Pediatric Pulmonology, Critical Care and Sleep Medicine, Dana Children's Hospital, Tel Aviv.

Harefuah
|July 28, 2009
PubMed
Summary
This summary is machine-generated.

Kleine-Levin Syndrome (KLS) is a rare neurological disorder causing recurring episodes of excessive sleepiness, cognitive, and behavioral changes. Increased physician awareness in Israel is crucial due to its higher incidence in Jewish populations.

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Area of Science:

  • Neurology
  • Rare Diseases
  • Sleep Medicine

Context:

  • Kleine-Levin Syndrome (KLS) is a rare, debilitating neurological disorder.
  • Characterized by recurrent hypersomnia, cognitive deficits, and behavioral changes.
  • Predominantly affects adolescent males, with a median duration of eight years.

Purpose:

  • To summarize the clinical characteristics, diagnostic challenges, and therapeutic approaches for Kleine-Levin Syndrome.
  • To highlight the disproportionately high incidence in Israel and among the Jewish population.
  • To emphasize the need for increased physician awareness in Israel.

Summary:

  • KLS presents with episodic hypersomnia, cognitive disturbances, compulsive eating, and hypersexuality, separated by periods of normal function.
  • Etiology remains unknown, with theories suggesting genetic predisposition and environmental triggers, possibly autoimmune factors.
  • Diagnosis relies on clinical manifestations; standard tests like EEG, MRI, and CSF are typically normal. Stimulants offer partial relief, while lithium may help prevent recurrences.

Impact:

  • Enhanced understanding of KLS clinical presentation and epidemiology.
  • Identifies diagnostic and therapeutic challenges, guiding future research.
  • Underscores the importance of targeted physician education in regions with higher KLS prevalence, such as Israel.