histamine/dental caries

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Electroencephalogram and behavioral changes induced by histamine application into the nasal cavity and the effects of some H(1)-receptor antagonists.

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The present study was performed to measure the olfactory bulb with an electroencephalogram (EEG) to investigate the relationship between the EEG and behavioral changes of rats induced by the topical application of histamine into the nasal cavity. The effects of some H(1)-receptor antagonists on the

Clearance of histamine from the peritoneal cavity of rats.

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To study the clearance of histamine from the peritoneal cavity of rats, histamine was either injected i.p. or released locally by the injection of compound 48/80. At various intervals peritoneal fluid was removed and analysed for histamine concentration by a fluorometric assay. Exogenous and

Muscle blood flow after amputation with special reference to the influence of osseous plugging of the medullary cavity. Assessed by 133 xenon and histamine. An animal experiment.

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The muscle blood flow (MBF) in rabbits subjected to amputation of the crus was assessed by means of 133 Xenon and Histamine. It was shown that after the operation the flow in the amputation stump was initially reduced. MBF in the stump increased more rapidly and stayed at a higher level after

Mobilization of leucocytes and subsequent release of histamine and lysosomal enzymes into the peritoneal and pleural cavities of rats by actinomycin D (dactinomycin).

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1. The effects of intraperitoneal injections of actinomycin D on the temporal characteristics of the accumulation of the inflammatory exudate and cells into the peritoneal and pleural cavities were studied in male Sprague Dawley rats. 2. A measurable quantity of the exudate appeared in both cavities

Tick histamine-binding proteins: lipocalins with a second binding cavity.

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Tick histamine-binding proteins (HBPs) are lipocalins with two binding pockets. One of these binds histamine with a high affinity and is found at the position expected from other lipocalins, adjacent to the omega-loop at the open-end of the beta-barrel. A second binding cavity, which is a

Characteristics of deoxycholic acid-induced histamine release from mast cells of guinea-pig rectocolonic mucosa and rat peritoneal cavity.

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Deoxycholic acid (DA) caused a dose-related release of histamine (HR) from mast cells of rat peritoneum (RPMC) and mucosal cells of guinea pig rectocolon (RCMC). In both cell populations, DA-induced HR was: (1) accompared by a parallel release of lactate dehydrogenase (LDH), (2) not affected by

The role of histamine in early bacterial inflammation of the rat peritoneal cavity.

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[Ca ionophore ionomycin-induced release of SRS and histamine into rat peritoneal cavity].

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Food consistency modulates eating volume and speed through brain histamine in rat.

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Changes in meal parameters of rats fed with different consistency of food were examined using hard and soft pellets. Meal size and eating speed of the first meal after 1800 h increased significantly in rats fed with soft pellets compared to those fed with hard pellets. Effects of histamine depletion

Supernormal histamine release and normal cytotoxic activity of beige (Chédiak-Higashi syndrome) rat mast cells with giant granules.

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The beige rat is an animal model of the Chédiak-Higashi syndrome. Since mast cells can be easily purified from the peritoneal cavity of rats, we investigated the function of beige rat mast cells with giant granules by using quantitative methods. Beige and normal rat mast cells were sensitized with

Histamine-release effectors from Angelica dahurica var. dahurica root.

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Six compounds isolated from the EtOAc fraction of the dried roots of Angelica dahurica var. dahurica inhibited compound 48/80-induced histamine levels in mouse peritoneal cavity (in vivo). Bergapten, oxypeucedanin hydrate, and byakangelicin inhibited compound 48/80-induced histamine elevation at a

Effects of olopatadine hydrochloride on the increase of histamine and peptide-leukotrienes concentrations in nasal lavage fluid following the antigen-antibody reaction in actively sensitized guinea pigs.

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To investigate the mechanism for the amelioration by olopatadine hydrochloride (olopatadine) of allergic rhinitis, we determined its effects on the increase of chemical mediator concentrations in nasal lavage fluid following the intranasal antigen challenge in guinea pigs actively sensitized with

The "nasal pool"-device for challenge and lavage of the nasal mucosa in children: histamine-induced plasma exudation responses.

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The accessibility of the nasal airway allows important examination of the airway mucosa in health and disease. However, the current methods for nasal challenge and lavage in children suffer from several shortcomings. In the present study, we have assessed the utility of a recently developed "nasal

Homology modelling and binding site mapping of the human histamine H1 receptor.

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Three-dimensional model of the human histamine H1 receptor was developed by homology modelling using the high resolution structure of bovine rhodopsin as template. Genetic algorithm based docking calculations were used to identify the role of several amino acids having an effect on agonist or

Evaluation of nasal passage patency after antigen and histamine challenge in guinea pigs by acoustic rhinometry.

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We investigated the effects of antigen and histamine on the nasal passage patency in guinea pigs with or without nasal allergy. The change of nasal patency was measured by acoustic rhinometry and nasal airway resistance. Acoustic reflections have been used in adult humans to determine nasal cavity

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