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Histamine in the nervous system.

Helmut L Haas¹, Olga A Sergeeva, Oliver Selbach

¹Institute of Neurophysiology, Heinrich-Heine-University, Duesseldorf, Germany. haas@uni-duesseldorf.de

Physiological Reviews

|July 16, 2008

Summary

This summary is machine-generated.

Histamine plays a crucial role in the brain, regulating wakefulness and attention. This neurotransmitter interacts with other systems to influence essential functions like sleep, learning, and memory.

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Area of Science:

Neuroscience
Neuroendocrinology
Pharmacology

Background:

Histamine acts as a neurotransmitter in the central nervous system and a signaling molecule in peripheral systems.
Histaminergic neurons originate in the tuberomamillary nucleus of the posterior hypothalamus and project throughout the brain.
These neurons are active during wakefulness, promoting alertness and attention.

Purpose of the Study:

To elucidate the multifaceted roles of histamine in the mammalian brain.
To explore the functions of histamine receptors (H1, H2, H3) in neural excitability and plasticity.
To understand the integration of histaminergic signaling within broader neural networks.

Main Methods:

Review of existing literature on histaminergic systems.
Analysis of histamine receptor functions and interactions.
Examination of histamine's role in regulating physiological and cognitive processes.

Main Results:

Histamine receptors (H1, H2, H3) modulate neural excitability and synaptic plasticity.
H1 and H2 receptors are primarily excitatory, while H3 receptors act as inhibitory auto- and heteroreceptors.
Histamine signaling networks with other neurotransmitter systems.

Conclusions:

Histamine is integral to maintaining wakefulness and attention.
Histaminergic pathways are critical for regulating diverse brain functions, including sleep-wake cycles, circadian rhythms, and cognitive processes.
Dysregulation of histamine signaling may contribute to various neurological and psychiatric disorders.