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The induction of erythema, edema, and the polyamine synthesis enzymes ornithine decarboxylase and S-adenosyl-L-methionine decarboxylase in hairless mouse skin by psoralens and longwave ultraviolet light.
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Mechanisms of psoralen photosensitization reactions.
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The basic aspects of cutaneous photosensitization reactions and the mode of therapeutic effectiveness of psoralens used extensively in the photochemotherapy of psoriasis and vitiligo have been reviewed. Psoralen-induced skin photosensitization and the therapeutic action of psoralens involve two
Comparative studies on the tolerance to photoinduced cutaneous inflammatory reactions by psoralen and rose bengal.
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The photochemotherapeutic value of topical 8-methoxypsoralen (8-MOP) plus UVA irradiation has been well recognized. The phototoxicity associated with psoralen plus UVA (PUVA) therapy is hallmarked by an increase in vascular permeability (iVP), the accumulation of polymorphonuclear leukocytes (aPMN)
Production of active oxygen species (1O2 and O2-.) by psoralens and ultraviolet radiation (320-400 nm).
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Furocoumarins (psoralens) are potent skin photosensitizing agents that are used in combination with long-wavelength ultraviolet radiation (320-400 nm) in the treatment of psoriasis and other skin diseases. Twelve linear and angular psoralens, capable of forming monofunctional and bifunctional
The nature and molecular basis of cutaneous photosensitivity reactions to psoralens and coal tar.
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The basic aspects of cutaneous photosensitization reactions and the mode of therapeutic effectiveness of psoralens and coal tar, the two groups of photosensitizing agents used extensively in the photochemotherapy of psoriasis, have been reviewed. Psoralen-induced skin photosensitization and the
The nature and molecular basis of cutaneous photosensitivity reactions to psoralens and coal tar.
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The basic aspects of cutaneous photosensitization reactions and the mode of therapeutic effectiveness of psoralens and coal tar, the two groups of photosensitizing agents used extensively in the photochemotherapy of psoriasis, have been reviewed. Psoralen-induced skin photosensitization and the
Psoralen-containing sunscreen induces phototoxicity and epidermal ornithine decarboxylase activity.
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Sunscreens containing 5-methoxypsoralen (5-MOP) are being promoted commercially to increase suntanning and sun protection. A recent study indicated that the 5-MOP concentration used in these sunscreens is too low to induce cutaneous phototoxicity with ultraviolet (UV) radiation. We investigated
Green tea protects against psoralen plus ultraviolet A-induced photochemical damage to skin.
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The use of psoralens combined with exposure to ultraviolet A radiation is a major form of treatment for psoriasis and a number of other common skin diseases. Although psoralen plus ultraviolet A treatment is highly effective, careful follow-up cohort studies have shown that it greatly increases risk
Psoralen Induces Developmental Toxicity in Zebrafish Embryos/Larvae Through Oxidative Stress, Apoptosis, and Energy Metabolism Disorder.
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Psoralen toxicity is an issue of wide concern. However, an assay for psoralen-induced developmental toxicity has not been reported to date. Moreover, the underlying mechanism of psoralen-induced developmental toxicity is unclear. Therefore, this study attempted to develop a psoralen-induced
Psoralen phototherapy and phototoxicity.
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Psoralen therapy followed by exposure to long-wave ultraviolet (UV-A) light, a combination called PUVA therapy, stimulates pigmentation of the skin. PUVA therapy is effective in the treatment of vitiligo and hypopigmented scars. Because psoralens sensitize skin to UV-A light, phototoxic reactions
Ultraviolet radiation suppresses mouse-ear edema induced by topical application of arachidonic acid.
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The effect of ultraviolet (UV) radiation on arachidonic acid (AA) cascade was examined using an in vivo model. Mouse ear lobes were painted with 1 mg AA, and the maximum response of ear swelling was measured 1 h after challenge. Arachidonic-acid-induced ear swelling was significantly suppressed by
Functional consequences of adenovirus-mediated murine pancreatic gene transfer.
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Pancreatic adenoviral gene transfer can be achieved with high efficiency; however, questions concerning tissue injury from this commonly used vector have not been addressed. In these experiments, the effects of adenoviral gene transfer on pancreatic exocrine function were evaluated. Direct
Instrumentation and action spectra in light-associated diseases.
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Instrumentation for studying action spectra in controls and various light-associated diseases is described. This study summarizes tests performed with a prism grating monochromator during the last 10 yr. There were 68 photodermatoses studied: xeroderma pigmentosum (XP) (1), lupus erythematosus (LE)
[Photobiophysics of furanocoumarins].
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Furocoumarins (psoralens) are photosensitizers of plant origin, which increase the sensitivity of biological objects to near ultraviolet (UV-A, 320-400 nm). In combination with UV-A, they are successfully used for treating many dermal and autoimmune diseases (PUVA therapy and photophoresis). Along
Protection of photosensitized rats against long ultraviolet radiation by topical application of compounds with structures similar to that of dihydroxyacetone.
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Dihydroxyacetone (DHA), a browning agent, protects photosensitive rats and humans against long ultraviolet radiation (UVA, 320-400 nm) and visible (blue) light. The photoprotective efficacy of DHA and structurally similar compounds was assessed as prevention of edema in the paws of
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