Abstract
Thyroid hormones have an influence on the connective tissue biology of the skin and, theoretically, topically applied thyroid hormones or hormone analogues could have a stimulatory effect on collagen synthesis. In this investigation the effect of topical tri-iodothyroacetic acid (Triac) and other thyroid hormone analogues were tested for their effect in preventing betamethasone-induced skin atrophy in the normal haired mouse. Triac, tri-iodoproprionic acid (Triprop) and the synthetically developed thyroid hormone analogue KB-026 and 2 different Triac cream formulations were applied along with betamethasone on shaved mouse skin. Triac in daily doses of 1 nmol/cm2 and higher was able to block the betamethasone-induced skin atrophy in mice skin. In high doses, Triprop and KB-026 also had a blocking effect. Triac alone had a stimulatory effect on dermal thickness. This study indicates that thyroid hormone analogues may be used to prevent corticosteroid-induced skin atrophy.
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