pyrogallol/hypersensitivity

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Contact sensitizing potential of pyrogallol and 5-amino-o-cresol in female BALB/c mice.

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Hair dye components such as pyrogallol and cresol have been shown previously to promote allergic reactions such as rashes, dermal inflammation, irritation and dermatitis. The objective of this study was to determine the contact sensitization potential of pyrogallol (PYR) and 5-amino-o-cresol (AOC)

Contact allergy to special and standard allergens in patients with venous ulcers.

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The aim of the study was to determine the prevalence of contact sensitivity in patients with leg ulcers, and possible difference in the rate of contact hypersensitivity to standard series of allergens used in patch testing, and to particular topical agents used in local therapy of leg ulcers in

The impact of the 67kDa laminin receptor on both cell-surface binding and anti-allergic action of tea catechins.

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Here, we investigated the structure-activity relationship of major green tea catechins and their corresponding epimers on cell-surface binding and inhibitory effect on histamine release. Galloylated catechins; (-)-epigallocatechin-3-O-gallate (EGCG), (-)-gallocatechin-3-O-gallate (GCG),

Structural requirements of flavonoids for inhibition of antigen-Induced degranulation, TNF-alpha and IL-4 production from RBL-2H3 cells.

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To clarify the structure-activity relationships of flavonoids for antiallergic activity, the inhibitory effects of various flavonoids on the release of beta-hexosaminidase, as a marker of degranulation of RBL-2H3 cells, were examined. Among them, luteolin (IC(50)=3.0 microM), diosmetin (2.1 microM),

Contact dermatitis in hairdressers' clients.

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The aim of our study was to report the frequency of sensitization to hairdressing allergens in a group of patients with contact dermatitis, in whom previous treatments with hair dyes or permanent wave solutions were suspected to be the cause. 49 of 261 hairdressers' clients (18.7%), who were patch

Contact dermatitis in hairdressers: the Italian experience. Gruppo Italiano Ricerca Dermatiti da Contatto e Ambientali.

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A multicenter study was performed in 9 Italian centers by members of the GIRDCA, to evaluate the frequency and source of contact sensitization in a group of 302 hairdressers with dermatitis. Occupational habits and use of preventive measures were specifically investigated both in these 302

Cross-reactions among hair dye allergens.

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BACKGROUND p-Phenylenediamine (PPD) is an important hair dye allergen, but there remains a reasonable suspicion that other hair dye chemicals may also be responsible for a proportion of the clinical burden of hair dye allergy. OBJECTIVE To assess to what extent presently assessed additional patch

Patch test results in patients with scalp dermatitis: analysis of data of the Information Network of Departments of Dermatology.

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BACKGROUND Contact dermatitis of the scalp may develop primarily due to exposure to cosmetic products or secondarily due to application of topical medicaments on affected skin. OBJECTIVE To illustrate the current spectrum of allergens in scalp dermatitis. METHODS Data of 1320 patients recorded by

[Contact eczema caused by pine wood].

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A 34 year-old woman, working with pine wood treated with sodium hydroxide and pyrogallol, developed dermatitis on arms, face and neck. Patch testing showed allergic reaction to colophony and pine wood, but not to sodium hydroxide or pyrogallol. Pine wood contains colophony. Since avoiding pine wood,

The influence of topical dermatological treatment modalities on epidermal Langerhans cells and contact sensitization in mice.

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The influence of the widely used topical dermatological treatment modalities anthralin, coal tar and pyrogallol on surface markers of epidermal Langerhans cells and contact sensitization was studied and compared with that of a PUVA treatment. A common effect of all dermatological therapies tested

Patch-testing with hairdressing chemicals.

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BACKGROUND Hairdressing chemicals may be associated with allergic contact dermatitis. OBJECTIVE To review our experience of patch-testing with hairdressing chemicals. METHODS We reviewed results from patients who underwent patch testing with our standard allergen series (including 15 hairdressing

New inhibitors for expression of IgE receptor on human mast cell.

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Exploration for inhibitors against expression of IgE receptor (Fc epsilonRI) on human mast cell, a significant trigger to acute and chronic allergic symptoms, disclosed epigallocatechin gallate (EGCG), epicatechin gallate, and gallocatechin gallate as active principles. Additionally, the

High performance liquid chromatography, thin layer chromatography and spectrophotometric studies on the removal of biogenic amines from some Egyptian foods using organic, inorganic and natural compounds.

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This work has been carried out to investigate the conditions which lead to removal of the biogenic amines through the model system. Also, the main goal of this research work is trying to remove biogenic amines; histamine and tyramine, from some Egyptian foods such as tomato, strawberry, banana and

[Sensitization to resorcinol in a prescription verrucide preparation: unusual systemic clinical features and prevalence].

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BACKGROUND Resorcinol is a rare sensitizer. In Lorraine, where it is used in high concentrations in an anti-wart ointment, this molecule has induced many cases of allergy. The purpose of this study was to describe clinical features in patients sensitized to resorcinol, to determine the incidence of

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