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Related Concept Videos

Narcolepsy01:07

Narcolepsy

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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.
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Sleep-Wake Cycles01:24

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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
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Human Genetics01:28

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
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Circadian Rhythms and Gene Regulation02:19

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The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
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Related Experiment Video

Updated: Sep 23, 2025

Noninvasive, High-throughput Determination of Sleep Duration in Rodents
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Higher basophil count decreases narcolepsy risk: a Mendelian randomization study.

Ang Li1, Hao Li1, Junyang Xie1

  • 1State Key Laboratory of Respiratory Disease, Department of Otolaryngology-Head and Neck Surgery, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, China.

Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology
|May 13, 2022
PubMed
Summary

Higher basophil counts, a type of white blood cell, are genetically linked to a reduced risk of narcolepsy. This finding suggests basophils may serve as a potential biomarker for narcolepsy diagnosis and treatment monitoring.

Keywords:
Basophil countCausalityMendelian randomizationNarcolepsyProtective factor

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Area of Science:

  • Immunology
  • Genetics
  • Neurology

Background:

  • Blood cell properties reflect immune status.
  • Previous studies noted correlations between basophil and T cell levels with narcolepsy.
  • Causal links between blood cell counts and narcolepsy risk remain unclear.

Purpose of the Study:

  • To genetically evaluate the causal relationship between blood cell counts and narcolepsy risk.
  • To identify specific blood cell types that influence narcolepsy susceptibility.

Main Methods:

  • Two-sample Mendelian randomization (MR) analyses were conducted using GWAS data for 35 blood cell properties and narcolepsy.
  • Inverse variance weighted, MR-Egger, and weighted median methods were applied.
  • Multivariable MR (MVMR) was used to adjust for mediation effects.

Main Results:

  • Several blood cell counts, including basophils, showed inverse associations with narcolepsy risk.
  • MVMR analysis confirmed a significant protective association between basophil counts and narcolepsy risk (OR=0.23).
  • Increased basophil counts were associated with a substantial decrease in narcolepsy risk.

Conclusions:

  • Elevated white blood cell counts, particularly basophils, act as protective factors against narcolepsy.
  • Basophil counts show potential as a novel biomarker for shortening narcolepsy diagnosis and monitoring treatment efficacy.