نتایج جستجو برای: histaminergic system
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Histamine and histamine receptors in the central nervous system actively participate in the modulation of motor control. In clinic, histamine-related agents have traditionally been used to treat vestibular disorders. Immunohistochemical studies have revealed a distribution of histaminergic afferents in the brainstem vestibular nuclei, including the lateral vestibular nucleus (LVN), which is cri...
Daphnia magna and Daphnia pulex are well-established model organisms in the fields of ecotoxicology and toxicogenomics. Among the many assays used for determining the effects of environmental and anthropogenic stressors on these animals is monitoring for changes in their phototactic behavior. In most arthropods, histamine has been shown to play a key role in the visual system. Currently, nothin...
Long-term potentiation (LTP) in hippocampal CA1 depends on the behavioral state of LTP induction. We hypothesize that histaminergic activity in the septohippocampal system, which is active during walking compared with other behavioral states, is responsible for the behavioral dependence of LTP. Field basal-dendritic EPSPs of CA1 pyramidal cells were recorded in freely behaving rats, and LTP was...
Since one of us, Takehiko Watanabe (TW), elucidated the location and distribution of the histaminergic neuron system in the brain with antibody raised against L-histidine decarboxylase (a histamine-forming enzyme, HDC) as a marker in 1984 and came to Tohoku University School of Medicine in Sendai, we have been collaborating on the functions of this neuron system by using pharmacological agents,...
Organotypic cultures of histaminergic tuberomammillary (TM) neurons were grown using explants obtained from newborn rats. The cultures were examined after immunohistochemical localization of the histamine synthetic enzyme, L-histidine decarboxylase (HDC). The morphological properties of the somata, dendrites and axons of HDC-immunoreactive TM neurons in organotypic culture were virtually indist...
The hypothalamus plays a major integrative role in the homeostasis of a variety of physiological processes, including sleep and waking. The preoptic area of the anterior hypothalamus (POAH) and the tuberomammillary nuclei (TMN) of the posterior hypothalamus (PH) interact to form part of an intrahypothalamic sleep/wake control system (1-6). For example, Υ-aminobutyric acid (GABA)-containing neur...
Histaminergic neurons in the tuberomammilary nucleus (TMN) of the hypothalamus form a widely projecting, wake-active network that sustains arousal. Yet most histaminergic neurons contain GABA. Selective siRNA knockdown of the vesicular GABA transporter (vgat, SLC32A1) in histaminergic neurons produced hyperactive mice with an exceptional amount of sustained wakefulness. Ablation of the vgat gen...
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