H Sukanto | PubMed Health

PubMed1981

Influence of topically applied corticosteroids on patch test reactions.

Four commercially available corticosteroid preparations were assayed for their capacity to suppress patch test reactions with contact allergens (nickel sulfate, nitrofuralum, potassium dichromate, epoxy resin, wood tars and Maneb) in sensitized individuals (n=14). Beta-methasone valerate, betamethasone dipropionate, hydrocortisone-17-butyrate and triamcinolone acetonide (0.05-0.7% solutions in isopropanol or ethanol) were applied under occlusion in amounts of 0.01, 0.02 and 0.04 ml, respectively. Patch tests were performed on the pretreated skin sites. The patches were removed 24 h after application and the reactions were read 15 min and 24 h later. The intensity of the reactions and the size of the infiltrated areas of the pretreated sites were measured and compared with those of a control patch test. Topical application of corticosteroids was found to have a suppressive effect both on the intensity as well as on the size of the epicutaneous reactions. No marked difference in the suppression effect of the four corticosteroids could be observed.

Administration, Topical↗

PubMed1980

Suppression of ultraviolet erythema by topical corticosteroids.

The effect of three commercially available corticosteroid preparations on ultraviolet (UV) erythema reaction was studied in healthy volunteers. Four series of circles were marked on the skin of their backs. One half of the circle of each series received 0.01 ml of 0.05% betamethasone valerate, 0.1% triamcinolone acetonide and 0.01% hydrocortisone 17-butyrate dissolved in isopropyl alcohol or ethanol and was covered with impermeable plastic. 24 h later, the sites were irradiated with UV light from a Kromayer lamp during 2, 4, 8, 16 or 32 sec. The reactions were evaluated 24 h afterwards. The suppression effect of corticosteroids was expressed as the blanching score (0-3). In a second series of experiments, the reversed sequence was tested: irradiation with UV light was followed by the application of corticosteroids (betamethasone and hydrocortisone). In both series of experiments the blanching effect of the corticosteroids was found to decrease with increasing UV dose. Corticosteroids applied after irradiation were found to have stronger blanching effects. With UV doses of 1 minimum erythema dose (MED), mean blanching scores of 2.3-3.0 were registered, while with doses of 4 MED or more, only small effects were noticed. The three corticosteroid preparations showed comparable suppression effects.

Administration, Topical↗