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Pàgina 1 des de 68 resultats
Scalp edema: don't forget sunburn in children.
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Scalp edema is an uncommon and striking finding in children that may alarm both parents and physicians. The objectives of this case report were to raise awareness among pediatric emergency physicians of the unusual presentation of sunburn as scalp edema. We present the case of an eight-year-old boy
Comparative potency of broad-band and narrow-band phototherapy sources to induce edema, sunburn cells and urocanic acid photoisomerization in hairless mouse skin.
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The Philips TL01 narrow-band (311-313 nm) fluorescent lamp provides effective phototherapy for psoriasis and atopic eczema while emitting less erythemogenic radiation than conventional broad-band (e.g. Philips TL12; 270-350 nm) sources. We studied the potency of TL01 and TL12 radiation to induce
Topical tocopherol acetate reduces post-UVB, sunburn-associated erythema, edema, and skin sensitivity in hairless mice.
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Exposure of the skin of the back of skh-1 hairless mice to UVB (310 nm peak) irradiation at doses of 0.115-0.23 J/cm2 results after 24-48 h in an erythema which can be quantified using an erythema meter, providing a useful model of sunburn. Application of pure d-alpha-tocopherol acetate, a thick
Sunburn and swelling: the edema of erythema.
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Evaluating the UVA photoprotection of sunscreens with murine skin edema.
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The acute and chronic deleterious effects of UVA on skin have prompted a growing interest in developing effective UVA-photoprotective sunscreens. The quantification of their UVA photoprotection remains, however, a major problem. In the present study, murine skin edema induced by 8-methoxypsoralen
[Histology of UV-induced epidermis reactions. 1. A contribution to the differentiation of sunburn cells].
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The UV-induced reaction of the epidermis is marked be extra- and intracellular edema and intraepidermal vesicles. Characteristical is the appearance of sunburn cells. In semithin section they can be differentiated in two cell types: "fried egg cells" prevail as early type in the exsudative phase
Effect of hypoxia on sunburn cell formation and inflammation induced by ultraviolet radiation.
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Oxygen intermediates are responsible for a number of ultraviolet (UV) radiation effects. To test the hypothesis that UV-induced formation of sunburn cells and skin edema (ear swelling) result from oxidative damage, we examined the effect of hypoxia tissue responses to UV in the mouse ear. Hypoxia
Direct comparison of DNA damage, isomerization of urocanic acid and edema in the mouse produced by three commonly used artificial UV light sources.
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Exposure to sunlight can result in a number of harmful effects, including sunburn, erythema, premature aging of the skin, immune suppression and skin cancer. Studies designed to understand the underlying mechanisms often depend upon the use of artificial sources of UV radiation. Unfortunately,
Sunscreens and T4N5 liposomes differ in their ability to protect against ultraviolet-induced sunburn cell formation, alterations of dendritic epidermal cells, and local suppression of contact hypersensitivity.
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Exposure of skin to ultraviolet (UV) radiation can lead to diverse biologic effects, including inflammation, sunburn cell formation, alterations of cutaneous immune cells, and impaired induction of contact hypersensitivity responses. The molecular mechanisms of these UV-induced effects are not
How I Manage Sunburn.
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In brief: Many people suffer the agonies of sunburn, sometimes repeatedly. Acute sunburn, characterized by erythema, edema, and at times blister formation, usually peaks within 12 to 24 hours after exposure, gradually subsides, and is followed by hyperpigmentation and peeling. Chronic sun damage,
The human sunburn reaction: histologic and biochemical studies.
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The ultraviolet-induced erythema reaction was investigated histologically and biochemically in four subjects, utilizing suction blister aspirates, analyzed for histamine and prostaglandin E2 (PGE2), and Epon-embedded 1-mu skin biopsy sections from control skin and from irradiated skin at intervals
Anti-inflammatory and antioxidant effects of Aloe saponaria Haw in a model of UVB-induced paw sunburn in rats.
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Ultraviolet B (UVB) irradiation mainly affects biological tissues by inducing an increase in reactive oxygen species (ROS) production which leads to deleterious outcomes for the skin, including pain and inflammation. As a protective strategy, many studies have focused on the use of natural products.
Sunburn reaction in the dorsal skin of hypotrichotic WBN/ILA-Ht rats.
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The dorsal skin responses to a single irradiation with a high-dose of UVB (10kJ/m2) were examined histologically and immunohistochemically in UVB-sensitive Wistar-derived hypotrichotic WBN/ILA-Ht rats (HtRs). Sunburn cells (SBCs) which were characterized by pyknotic nuclei and eosinophilic cytoplasm
Attenuation of UVB-induced sunburn reaction and oxidative DNA damage with no alterations in UVB-induced skin carcinogenesis in Nrf2 gene-deficient mice.
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UV radiation is an important environmental factor in the pathogenesis of skin aging and cancer. Many harmful effects of UV radiation are associated with generation of reactive oxygen species. Cellular antioxidants prevent the occurrence and reduce the severity of UV-induced photoaging and diseases
Pefloxacin and ciprofloxacin increase UVA-induced edema and immune suppression.
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BACKGROUND
Quinolone antibiotics are popularly prescribed antibiotics because of their wide antibacterial spectrum and lowered bacterial resistance. Quinolone antibiotics are one of the well-known photosensitizers that induce phototoxicity. Their role in photocarcinogenesis has been suggested in
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