Histamine and Delirium: Current Opinion

This study indicated that switch from H2 blockers to PPIs reduced delirium and, thus, providing an appropriate strategy to combat drug-induced delirium using antiulcer drugs (Fujii et al., 2012). The ventrolateral preoptic nucleus is a sleep-promoting nucleus located in the basal forebrain. A commonly used intravenous anesthetic, propofol, had been reported to induce sleep and augment the firing rate of neurons in ventrolateral GABAergic preoptic nucleus, but the underlining mechanism is yet to be clearly determined. Interestingly, the propofol-induced inhibition of inhibitory postsynaptic currents on noradrenalin-inhibited neurons have been shown to be mediated by histaminergic H1 and H2 receptors (Liu et al., 2017). Opioids and Histamine Interactions An interaction between histaminergic and opioidergic systems within the CNS was proposed three decades ago, suggesting that analgesia produced by opioids may be associated with release of histamine and the stimulation of histamine receptors at the supraspinal (central) level (Nishibori et al., 1985). Many more recent studies have shown that histamine receptor antagonists can modulate the analgesic action of opioids, however, the site and mode of action of this interaction differs between the spinal or supraspinal level, and depends on the subtype of histamine receptor (Mobarakeh et al., 2002, 2006, 2009; Stein et al., 2016). A series of studies have also shown than in H1R and H2R KO mice, morphine-induced antinociception was ...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research

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I’ve struggled with professional identity from time to time, but after completing my PhD thesis looking at how people live well with pain, I’ve developed a new understanding of how occupational therapists add value in this area of practice. Occupational therapists joke that “no-one knows what an occupational therapist does” – and sadly, that’s true. It’s not because what we do isn’t important, it’s because our view of people and the way we work with people differs from most health professions. Occupational therapists don’t treat disease per se, we work with peo...
Source: HealthSkills Weblog - Category: Anesthesiology Authors: Tags: Chronic pain Occupational therapy Professional topics Resilience Science in practice Source Type: blogs
Abstract What biological factors account for resilience to pain or to behavioral stress? Here, we discuss examples of cellular and molecular mechanisms within disparate parts of the nervous system as contributors to such resilience. In some especially well-studied humans, it is possible to identify particular neuronal cell types in the peripheral nervous system (PNS) and pinpoint specific genes that are major contributors to pain resilience. We also discuss more complex factors that operate within the central nervous system (CNS) to confer resilience to behavioral stress. We propose that genetic and neurobiologica...
Source: Trends in Molecular Medicine - Category: Molecular Biology Authors: Tags: Trends Mol Med Source Type: research
This study aimed to evaluate patients' satisfaction with their interactions with PIC staff and whether sociodemographic factors, depression and anxiety symptoms were associated with their perceptions of these interactions. In this cross-sectional study, we collected data from 84 patients receiving inpatient care in three psychiatric settings in Sweden. The patients' perceptions of interactions with staff and self-reported degrees of depression and anxiety were evaluated through questionnaires. Overall, patients were satisfied with the patient-staff interaction. However, significantly higher scores were related to staffs' p...
Source: Issues in Mental Health Nursing - Category: Nursing Tags: Issues Ment Health Nurs Source Type: research
In this study, we found two species, Milnesium pacificum sp. nov. and Milnesium tardigradum Doyère, 1840, from three southern islands and two cold regions in Japan, respectively. Milnesium pacificum sp. nov., having dorsal sculpturing, exhibits an early positive change in claw configuration. On the other hand, M. tardigradum s.s. from Japan has an early negative claw configuration change, as has been reported in a recent study on the neotype population of this species. We performed DNA barcoding for both species, which indicated that M. pacificum sp. nov. has a close affinity with an undescribed Milnesium species co...
Source: Zoological Science - Category: Zoology Authors: Tags: Zoolog Sci Source Type: research
Abstract Having been reported in 1898 for the first time from Japanese waters, the lineid heteronemertean Lineus longifissus auct. is known to inhabit tidal flats under the influence of the warm Kuroshio Current along the coasts of Honshu and southwestward, characteristically with a uniformly raisin-colored to black body lacking a caudal cirrus. The taxonomic identity of the Japanese L. longifissus auct. has been questioned by specialists because of some obvious morphological differences between Lineus longifissus (Hubrecht, 1887) s.str. (now in Heteronemertes Chernyshev, 1995), originally described from the suban...
Source: Zoological Science - Category: Zoology Authors: Tags: Zoolog Sci Source Type: research
Abstract Batoidea (rays and skates) is a monophyletic subgroup of elasmobranchs that diverged from the common ancestor with Selachii (sharks) about 270 Mya. A larger number of batoids can adapt to low-salinity environments, in contrast to sharks, which are mostly stenohaline marine species. Among osmoregulatory organs of elasmobranchs, the kidney is known to be dedicated to urea retention in ureosmotic cartilaginous fishes. However, we know little regarding urea reabsorbing mechanisms in the kidney of batoids. Here, we performed physiological and histological investigations on the nephrons in the red stingray (Hem...
Source: Zoological Science - Category: Zoology Authors: Tags: Zoolog Sci Source Type: research
Abstract Condition-specific competition is a phenomenon by which inter-specific competitive dominance changes as a result of environment, and is an important factor determining species distribution. Congeneric charrs in Hokkaido, Japan, provide one of the best examples of condition-specific competition: Dolly Varden, Salvelinus malma, often dominate in cold streams (6-8°C), whereas white-spotted charr, Salvelinus leucomaenis, dominate in warmer streams (> 10°C). While past laboratory and field experiments have demonstrated the great advantage of white-spotted charr at higher water temperatures, the adva...
Source: Zoological Science - Category: Zoology Authors: Tags: Zoolog Sci Source Type: research
Abstract The genetic diversity of the genus Ligidium in Hokkaido and Niigata, northern Japan, was investigated by analyzing the cytochrome c oxidase subunit 1 (CO1) region in the mitochondrial DNA (mtDNA). The genetic diversity in Hokkaido was much lower than that in Niigata. Nine different operational taxonomic units (OTUs) were identified. Only a single OTU, most likely Ligidium japonicum, was found in Hokkaido, whereas all nine OTUs were found in Niigata. Using the mtDNA evolutionary rate determined for the marine invertebrate Haptosquilla pulchella (Miers, 1880), population expansion for OTU1 in Hokkaido was e...
Source: Zoological Science - Category: Zoology Authors: Tags: Zoolog Sci Source Type: research
Abstract Sika deer (Cervus nippon) in Japan are classified into southern and northern groups. However, previous studies primarily relied on maternally inherited mitochondrial DNA (mtDNA). The paternally inherited Y-chromosome is useful for analyzing the contribution of males to the population genetic history of sika deer. In total, approximately 16 kb of partial sequences of four Y-chromosomal genes, Y-linked, sex-determining region Y, DEAD-box helicase 3 Y-linked, and Zinc finger protein Y-linked, were sequenced to investigate intraspecific variation. As a result, we identified nine intronic single nucleotide pol...
Source: Zoological Science - Category: Zoology Authors: Tags: Zoolog Sci Source Type: research
Abstract Opioids play a pivotal role in pain transmission but are also able to modulate immune cell functions. In the last decades a connection between opioids and integrins-adhesion molecules involved, among many other processes, in leukocyte recruitment at inflamed site-has been established. To study immune cell integrin-mediated adhesion, cell adhesion assay is a simple, reproducible, and valuable tool capable of unraveling concentration-dependent effects of a test candidate on integrin-mediated cell adhesion. PMID: 32975797 [PubMed - as supplied by publisher]
Source: Mol Biol Cell - Category: Molecular Biology Authors: Tags: Methods Mol Biol Source Type: research
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