leucotriene/hypersensitivity

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Suppressive effects of nitric oxide-releasing prednisolone NCX-1015 on the allergic pleural eosinophil recruitment in rats.

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BACKGROUND The addition of a nitric oxide (NO)-releasing moiety to prednisolone was shown to enhance the anti-inflammatory activity of this glucocorticoid in some experimental conditions, but its effectiveness in the context of eosinophilic inflammation remains to be elucidated. OBJECTIVE This study

Bronchospasm induced in allergic patients by in vitro released mediators. II. Analysis of possible mechanisms.

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In a previous report, it was shown that cultures of peripheral blood leukocytes, from allergic individuals, in the presence of antigen will produce bronchospasm inducing agents in the supernatants. In this study, the responsibility of several mediators was analyzed, i.e., histamine, IgE,

[Search for a threshold to distinguish between locoregional and systemic reactions using the histamine liberation value and the LTC4 level].

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Allergy to Hymenoptera venom (VH) effects more and more patients in France. It is manifest in two main forms, which are Loco-regional (RLR) and Systemic reactions (SR). This allergy is detectable amongst others by the techniques of histamine release (HR) and release of leucotrienes C4 (LTC4). The

Means of increasing sensitivity of an in vitro diagnostic test for aspirin intolerance.

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BACKGROUND Pseudo-allergic reactions caused by aspirin (acetyl salicylic acid; ASA) often resemble immediate-type hypersensitivity reactions consisting of urticaria and angioedema or rhinoconjunctivitis, asthma and nasal polyps. In the last few years, a new in vitro assay based on determination of

[Physiopathology of inflammatory events in asthma].

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Inflammatory events in asthma include an initiation step dependent on dendritic cells, an effector step which involves the release of a large number of mediators by inflammatory cells, mastocytes, polymorphonuclear neutrophils and eosinophils, alveolar macrophages and monocytes, and lymphocytes; and

[Hyperreflectoric rhinopathy].

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Research in molecular biology in the past few years offers new views on vasomotor rhinitis. The key role of mediator substances which contain the mast cell and which, after degranulation, are active immediately by histamine release or act in a delayed manner (eg. leucotriene), is discussed, as well

In vitro release of arachidonic acid and in vivo responses to respirable fractions of cotton dust.

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It was considered that the fall in lung function seen after exposure to cotton dust may be attributable in part to the activity of arachidonic acid metabolites, such as leucotrienes as well as to the more established release of histamine by cotton dust. However, we found that cotton and barley dusts

Systemic release of mucosal mast-cell protease in primed brown Norway rats after feeding with beta-lactoglobulin.

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The plasma level of mucosal mast-cell protease was examined to find whether such measurements could be an indicator of allergic response to beta-lactoglobulin (beta-LG) challenged orally by rats. Brown Norway rats, which had been raised on a bovine milk-free diet, were systemically sensitized on day

[Corticosteroids].

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The corticosteroids or glucocorticoids have a preponderant place in the treatment of allergic manifestations. They are used to ward of the inflammatory process triggered and auto-maintained by some mediators (histamine, tryptase, leucotrienes, prostaglandin, ECP, MBP ...) that are released by some

Sinus CT scans and mediator release in nasal secretions after nasal challenge with cypress pollens.

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BACKGROUND Involvement of paranasal sinuses has been suggested in allergic rhinitis but not clearly demonstrated. OBJECTIVE To investigate the relationship between intermittent allergic rhinitis and computerized tomography (CT). METHODS Twenty patients with intermittent rhinitis and sensitized to

[Aspirin-exacerbated respiratory disease].

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Aspirin sensitivity is an important underlying disease in patients with nasal polyps, intrinsic asthma or urticaria. The terms "Aspirin- (or analgetics-) induced asthma" or "Aspirin-exacerbated respiratory disease" (AERD) describe the syndrome of chronic rhinosinusititis, polyposis nasi, asthma and

What do we know about the genetics of aspirin intolerance?

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Although acetylsalicylic acid is prescribed for a broad range of diseases, it can induce a wide array of clinically recognized hypersensitivity reactions, including aspirin-intolerant asthma (AIA) with rhinitis and aspirin-intolerant urticaria (AIU) with anaphylaxis. Altered eicosanoid metabolism is

Montelukast-induced adverse drug reactions: a review of case reports in the literature.

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BACKGROUND Montelukast, a leucotriene receptor antagonist, binds the cysteinyl leucotriene type 1 receptor. Montelukast is commonly prescribed to asthma patients as add-on therapy to inhaled corticosteroids. Several clinical trials emphasized that montelukast can be considered a safe drug. However,

Effective treatment of experimental ragweed-induced asthma with STAT-6-IP, a topically delivered cell-penetrating peptide.

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BACKGROUND Treatment of allergic airways disease including asthma remains primarily local immunosuppression with topical corticosteroid and symptomatic management with antihistamines and anti-leucotrienes. We have developed a novel topical therapy designed to specifically inhibit the events

Antiallergic agent from natural sources. 2. Structures and leukotriene release-inhibitory effect of torososide B and torosachrysone 8-O-6"-malonyl beta-gentiobioside from Cassia torosa Cav.

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Two new anti-allergic compounds, torososide B and torosachrysone 8-O-6"-malonyl gentiobioside were isolated from the seeds of Cassia torosa Cav., and their structures were established as physcion 8-O-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl-

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