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Pleiotropy01:33

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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
15:48

ALS - Motor Neuron Disease: Mechanism and Development of New Therapies

Published on: July 29, 2007

Kleine-Levin syndrome.

D Radcliffe Lisk1

  • 1Basildon University Hospital, Basildon, UK. radcliffe.lisk@btuh.nhs.uk

Practical Neurology
|January 20, 2009
PubMed
Summary
This summary is machine-generated.

Kleine-Levin syndrome, a rare sleep disorder, causes periodic episodes of extreme sleepiness, behavioral changes, and increased appetite, primarily in adolescent males. While the exact cause is unknown, hypothalamic dysfunction is suspected, with no consistently effective treatments currently available.

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Area of Science:

  • Neurology
  • Sleep Medicine
  • Endocrinology

Background:

  • Kleine-Levin syndrome (KL S), also known as Rip van Winkle disease, is a rare neurological disorder.
  • It predominantly affects adolescent males, characterized by recurrent episodes of severe hypersomnolence.

Observation:

  • Key features include intermittent hypersomnolence, significant behavioral and cognitive disturbances, and hyperphagia.
  • Some patients also exhibit hypersexuality during episodes.
  • Episodes typically last one to two weeks, with individuals being asymptomatic between these periods.

Findings:

  • The underlying cause of KL S remains unidentified, but hypothalamic dysfunction is strongly implicated.
  • Relapses occur periodically, ranging from weeks to months, and the condition can persist for over a decade.

Implications:

  • Current treatment strategies for KL S lack consistent efficacy.
  • Stimulants like methylphenidate and modafinil, along with lithium carbonate, have shown variable success in managing symptoms.
  • Further research into the pathophysiology of KL S is crucial for developing targeted therapies.