Histamine in the brain: beyond sleep and memory.

Area of Science:

• Neuroscience
• Pharmacology

Background:

• The histaminergic system's role in consciousness and metabolism was established after observing antihistamine side effects.
• Histaminergic neurons in the posterior hypothalamus project throughout the CNS, indicating widespread regulatory effects.

Purpose of the Study:

• To summarize recent findings on the interplay between histamine and other neurotransmitter systems.
• To propose novel interactions as substrates for behavioral changes linked to the histaminergic system.

Main Methods:

• Review of functional studies demonstrating central histaminergic system's impact on CNS functions.
• Analysis of preclinical research targeting histamine receptors for therapeutic applications.

Main Results:

• Activation of the central histaminergic system influences behavior and homeostasis, including sleep, cognition, and feeding.
• Interactions between histaminergic neurons and other neurotransmitter systems are increasingly understood.

Conclusions:

• Novel compounds targeting brain histamine receptors are under development for sleep, cognitive, and feeding disorders.
• Understanding neurotransmitter interplay is key to developing new therapies for histaminergic system manipulation.