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PUVA increases ornithine decarboxylase gene expression in mouse skin
T Kono1, N Mizuno, S Taniguchi
1Department of Dermatology, Osaka City University Medical School, Japan.
Dermatologica
|January 1, 1990
Summary
Topical PUVA therapy significantly increases ornithine decarboxylase (ODC) activity and gene expression in mouse skin. This rise in ODC, a key enzyme, is observed 24 hours post-UV-A treatment, indicating enhanced gene expression.
Area of Science:
- Dermatology
- Molecular Biology
- Biochemistry
Background:
- Topical PUVA (psoralen plus ultraviolet A) therapy is used for skin conditions.
- Ornithine decarboxylase (ODC) is a crucial enzyme in polyamine synthesis.
- Understanding ODC regulation is important for dermatological research.
Purpose of the Study:
- To investigate the effect of topical PUVA on ornithine decarboxylase (ODC) activity.
- To examine the impact of topical PUVA on ODC gene expression in mouse skin.
Main Methods:
- Hairless mice skin was treated with 0.3% 8-methoxypsoralen.
- UV-A irradiation (3 J/cm2) was administered 1 hour after topical application.
- ODC activity and mRNA levels were measured at various time points.
Main Results:
- Topical PUVA treatment led to a marked increase in ODC activity.
- ODC activity peaked at 24 hours after UV-A irradiation.
- ODC mRNA levels increased approximately fivefold compared to controls at 24 hours.
Conclusions:
- PUVA-induced ODC activity is, in part, regulated by increased ODC gene expression.
- This study elucidates a molecular mechanism underlying PUVA's effects on skin.
- Findings contribute to understanding enzyme regulation in photochemotherapy.