Lichen picker's dermatitis (<i>Cladonia alpestris</i> (L) Rab.)

Salo, Heini; Hannuksela, Matti; Hausen, B. M.

doi:10.1111/j.1600-0536.1981.tb03951.x

Cited by 36 publications

(3 citation statements)

References 13 publications

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“…Moreover, in their previous work, the authors stated that application of usnic acid (up to 50%) to healthy individuals, without previous contact dermatitis, caused no primary skin irritation (Mitchell and Armitage 1965). Opposite results were described by Salo et al (1981), in a study of lichen pickers, who reacted to both usnic acid enantiomers. This observation was in agreement with the study of Hausen et al (1993), on the sensitizing potency of both usnic acid forms on the guinea pigs by a modified FCA (Freund's complete adjuvant).…”

Section: Allergic Potencymentioning

confidence: 73%

Enantioselective activity of usnic acid: a comprehensive review and future perspectives

2019

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This review is focused on the comparison of the biological and pharmacological activities of usnic acid enantiomers. Most of the available data refer to (?)-usnic acid, while the left-handed isomer has been less often significantly studied. Special attention was paid to the experiments comparing both (?)-and (-)-usnic acid at the same time, the results of which indicated interesting differences, however no tendency as to which enantiomer was more potent could be observed. Nevertheless, more studies, especially on (-)-usnic acid, are needed to give a final explanation for the similarities and differences between both usnic acid enantiomers. These should be especially directed to steric structure-activity relationship of the enantiomers, tested under the same experimental conditions, which may help to explain the possible mechanisms of their actions.

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Section: Allergic Potencymentioning

confidence: 73%

Enantioselective activity of usnic acid: a comprehensive review and future perspectives

2019

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“… 4 Another group of workers prone to occupational dermatitis are the ‘lichen pickers’ who harvest Cladonia stellaris which is used in Christmas decorations, flower arrangements, toy trees in model railway layouts and other products. 5 Non‐occupational contact with lichens includes carrying firewood, children climbing trees or arranging Christmas decorations made from lichens.…”

Section: Discussionmentioning

confidence: 99%

Allergy to lichen acids in a fragrance

Rademaker

2000

Aust J Dermatology

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A 48-year-old clerical officer with a recurrent facial eruption had positive patch test reactions to nickel, fragrance mix and lichen acid mix. On testing to individual ingredients of fragrance mix and lichen acid mix, she had 2+ reactions to oak moss, which is thought to be the main allergen in fragrance mix, and to usnic acid, which is one of a number of lichen acids comprising oak moss. Avoidance of fragrance use resulted in clearing of the eruption but, subsequently, an acute vesicular flare on her face and hands occurred after exposure to lichen on garden shrubs.

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“…Irradiation of patch tests to lichens and their extracts may elicit enhanced responses [264][265][266][267].An airborne contact dermatitis simulating photodermatitis has also been suggested to contribute to the clinical features seen in patients with lichen allergy [46]. Immediate-type allergies with asthma and urticaria were described following inhalation of, or direct contact with, algae from lichens [268].…”

Section: Core Messagementioning

confidence: 99%