Jan 1, 1985

Modulation of pig epidermal adenylate-cyclase responses by protein-synthesis inhibitors: its relation to glucocorticoid and colchicine effects

Archives of Dermatological Research
H IizukaA Ohkawara

Abstract

The effects of protein-synthesis inhibitors (actinomycin D, puromycin, and cycloheximide) on epidermal adenylate-cyclase responses were investigated. When pig skin (epidermis) was incubated in RPMI-1640 medium, the beta-adrenergic adenylate-cyclase response (epinephrine-induced cyclic-AMP accumulations) decreased, whereas the adenosine and histamine responses increased after long-term (up to 48 h) incubation. The addition of actinomycin D or puromycin to the incubation medium resulted in a marked increase in epinephrine-induced cyclic-AMP accumulations and a decrease in adenosine- and histamine-induced cyclic-AMP accumulations. Cycloheximide had a weak effect on the epinephrine response, and had apparently stronger effects on the adenosine and histamine responses than actinomycin D or puromycin. Histologically, various degenerative changes of keratinocytes (with or without acantholytic changes) were observed after long-term incubation with these protein-synthesis inhibitors. Both low- and high-Km cyclic-AMP phosphodiesterase activities were moderately decreased by the protein-synthesis inhibitors. However, augmentation effects on the beta-adrenergic response were also observed in the presence of the cyclic-AMP phosphodiesterase...Continue Reading

Mentioned in this Paper

Epinephrine Acetate
Puromycin Hydrochloride
Skin
Glucocorticoid Effect
Family suidae
Colchicine, (R)-Isomer
Epidermis
Ac-De
Adenylate Cyclase
In Vitro [Publication Type]

About this Paper

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