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Electrophysiology on Isolated Brainstem-spinal Cord Preparations from Newborn Rodents Allows Neural Respiratory Network Output Recording

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Respiratory regulation in narcolepsy.

Fang Han¹

¹Department of Pulmonary Medicine, Peking University People's Hospital, Beijing, China. hanfang1@hotmail.com

Sleep & Breathing = Schlaf & Atmung

|February 15, 2011

Summary

This summary is machine-generated.

Human narcolepsy patients show decreased hypoxic ventilatory response, linked to HLA-DQB1*0602 status, not hypocretin deficiency. This suggests species differences in orexin

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Area of Science:

Neuroscience
Sleep Medicine
Respiratory Physiology

Background:

Narcolepsy is a sleep disorder linked to hypocretin (orexin) deficiency and the HLA-DQB1*0602 gene.
Orexins play a role in regulating respiratory responses in an animal models.
Increased prevalence of sleep apnea in narcolepsy suggests potential interactions with ventilatory control.

Purpose of the Study:

To investigate the role of hypocretin deficiency and HLA-DQB1*0602 status in human ventilatory chemosensitivity.
To compare human findings with animal models regarding orexin's influence on respiratory regulation.

Main Methods:

Assessment of hypoxic and hypercapnic ventilatory responses in human narcolepsy patients.
Analysis correlating ventilatory responses with hypocretin deficiency and HLA-DQB1*0602 status.

Main Results:

Narcolepsy patients exhibited significantly decreased hypoxic ventilatory responsiveness.
Hypercapnic ventilatory responsiveness was not significantly altered in narcolepsy patients.
Decreased hypoxic response was associated with HLA-DQB1*0602 status, not hypocretin deficiency.

Conclusions:

Hypocretin-1 is not a primary determinant of human chemoresponsiveness, contrary to findings in animal models.
Species differences in the role of hypocretins in respiratory regulation may exist between humans and mice.
HLA-DQB1*0602 status influences hypoxic ventilatory control in human narcolepsy.