T. Sengoku et al., Possible inhibitory mechanism of FK506 (tacrolimus hydrate) ointment for atopic dermatitis based on animal models, EUR J PHARM, 379(2-3), 1999, pp. 183-189
The effects of FK506 (tacrolimus hydrate) ointment on cutaneous allergic re
actions in mice and rats were investigated. FK506 ointment showed significa
nt suppressive effects on delayed allergic reactions in both species, and e
specially in rats, its inhibitory action was much stronger than that of alc
lometasone dipropionate, a so-called medium class steroid ointment. On the
other hand, FK506 ointment did not inhibit the immediate allergic reaction
in rats. FK506 ointment suppressed the delayed allergic reactions in locall
y passively sensitized mice to the same degree as that in actively sensitiz
ed mice. Accordingly, it is speculated that FK506 ointment inhibits the act
ivation of sensitized T lymphocytes (Th1 cells) already accumulated in the
dermis. (C) 1999 Elsevier Science B.V. All rights reserved.