lawsone/reazioni di ipersensibilità

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Allergic contact dermatitis to pure henna.

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Henna is a naturally occurring brown dye made from the leaves of the tree Lawsonia inermis. The active ingredient of henna is lawsone (2-hydroxy-1, 4-naphthoquinone). It is traditionally used in Islamic and Hindu cultures as a hair coloring and as a dye for decorating the nails or making temporary

Monitoring of Lawsone, p-phenylenediamine and heavy metals in commercial temporary black henna tattoos sold in Turkey.

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BACKGROUND Henna has a very low allergic potential, and severe allergenic contact dermatitis is mainly caused by p-phenylenediamine (PPD), which is added to temporary black 'henna tattoos', and potentially also by some heavy metals. OBJECTIVE To determine the presence of, and quantify, Lawsone, PPD

Occupational immediate-type hypersensitivity to henna in a hairdresser.

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A case of a hairdresser who developed an immediate-type hypersensitivity with urticaria, rhinitis, and bronchial asthma on exposure to henna is reported. Prick tests with henna 1% in aqua and in ethanol showed positive reactions. Both patch tests and prick tests performed with the dye in henna,

Effects of lawsone methyl ether mouthwash on oral Candida in HIV-infected subjects and subjects with denture stomatitis.

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OBJECTIVE To determine (i) effects of lawsone methyl ether (LME) mouthwash on antifungal drug resistance of oral Candida, (ii) effects of LME mouthwash on changes in genotype of oral Candida, and (iii) allergy and subjects' satisfaction on LME mouthwash in comparison with chlorhexidine

Antifungal activity of lawsone methyl ether in comparison with chlorhexidine.

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OBJECTIVE The aim of this study was to determine the antifungal activity of lawsone methyl ether mouthwash (LME) in comparison with chlorhexidine mouthwash (CHX) in vitro and in vivo. METHODS For in vitro study, each mouthwash preparation was added into the inoculum of Candida. The turbidity was

Preventive effects of Impatiens balsamina on the hen egg-white lysozyme (HEL)-induced decrease in blood flow.

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Monitoring the blood flow of unanesthesized mice was found to be a reliable and effective method for studying their anaphylactic responses, in addition to the known method of monitoring blood pressure. Hen egg-white lysozyme (HEL)-specific anaphylaxis in mice was estimated by monitoring the decrease

Quantification of para-phenylenediamine and heavy metals in henna dye.

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Henna (Lawsonia inermis, family Lythraceae) is a shrub cultivated in India, Sri Lanka and North Africa and contains the active dye lawsone (2-hydroxy-1,4-naphthoquinone). Henna dye is obtained from the dried leaves, which are powdered and mixed with oil or water and are used to prepare hair and body

Quantification of p-phenylenediamine and 2-hydroxy-1,4-naphthoquinone in henna tattoos.

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BACKGROUND Very few studies are available in which the components of henna products used by tattoo artists have been analysed. OBJECTIVE The aim of this study was to quantify the amounts of lawsone (2-hydroxy-1,4-naphthoquinone, the active ingredient in henna) and p-phenylenediamine (PPD) in

Evaluation of in vitro testing strategies for hazard assessment of the skin sensitization potential of "real-life" mixtures: The case of henna-based hair-colouring products containing p-phenylenediamine.

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Allergic contact dermatitis caused by henna-based hair-colouring products has been associated with adulteration of henna with p-phenylenediamine (PPD).To develop a testing approach based on in vitro techniques that address key events within the skin

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