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At least 1,297 records · Page 72Linked to original sources
PubMed1982

Stereospecificity of allergic contact dermatitis (ACD) to enantiomers. Part III. experimentally induced ACD to a natural sesquiterpene dialdehyde, polygodial in guinea pigs.

Guinea pigs were sensitized to polygodial 1, a natural sesquiterpene dialdehyde, using intradermal injections in Freund's complete adjuvant. Cross-reactions with a (+/-)-mixture of warburganal and (-)-warburganal 2 (a natural hydroxylated derivative of polygodial) showed a high specificity of the allergic response since the (-)-pseudoenantiomer (having the same configuration as the primary sensitizer) gave a stronger skin reaction than the racemic mixture.

Allergens↗
PubMed1984

Allergic contact dermatitis to laurel (Laurus nobilis L.): isolation and identification of haptens.

Two methods, using methylenelactone dimethylamino adducts, were used to remove selectively alpha-methylene gamma-butyrolactones from Laurus nobilis L. extracts. Isolated lactones were identified and "treated" extracts recovered. Two guinea-pig groups were sensitized to crude extracts and "treated" extracts, respectively, and tested with primary sensitizer and with different lactones. Only the first group showed strong skin reactions to crude extracts and to the lactones. Treated extracts were shown to be anallergic.

4-Butyrolactone↗
PubMed1983

Allergic contact dermatitis to garlic (Allium sativum L.). Identification of the allergens: the role of mono-, di-, and trisulfides present in garlic. A comparative study in man and animal (guinea-pig).

Garlic (Allium sativum L.) water- and ethanol-soluble extracts were prepared and purified by column chromatography. They were tested on garlic-sensitive patients and showed that the allergenic fraction was well located in a few column chromatography fractions. Guinea-pigs were sensitized with garlic water-soluble extracts and tested (open epicutaneous tests) with several fractions. The presence of diallyldisulfide was detected in the sensitizing chromatographic fractions. Guinea-pigs were successfully sensitized to this product and cross-reacted to garlic; animals sensitized to garlic extracts cross-reacted to diallyldisulfide. Both groups reacted to allicin, an oxidized derivative of diallyldisulfide present in garlic. Garlic-sensitive patients showed positive tests to diallyldisulfide, allylpropyldisulfide, allylmercaptan and allicin.

Allergens↗
PubMed1982

Immuno-allergological aspects of scabies. A comparative study of spontaneous blastogenesis in the dermal infiltrates of common and hyperkeratotic scabies, allergic contact dermatitis and irritant dermatitis.

By means of planimetric analysis and determination of 3H-thymidine labelling indices of mononuclear cells infiltrating the dermis, it has been suggested that the cellular arm of the immune system is activated after infestation of the human host's skin by the scabies mite. Subtle modifications of host-parasite relationships may explain why a single pathogenetic agent (i.e. the scabies mite) is able to evoke such a wide range of clinical lesions in the host.

Dermatitis, Contact↗