Results 151 to 160 of about 1,055 (197)
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Phototoxicity and photoallergy
Seminars in Cutaneous Medicine and Surgery, 1999Photosensitivity may be phototoxic or photoallergic. Phototoxicity is much more common. There are 2 types of phototoxicity: photodynamic, which requires oxygen, and nonphotodynamic, which does not. Reactions induced by porphyrin molecules, coal tar derivatives, and many drugs are photodynamic.
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CONTACT PHOTOALLERGY TO TRIBROMSALICYLANILIDE
British Journal of Dermatology, 1969SUMMARY. . It has been demonstrated that 5,4′ -dibromsalicylanilide (5,4′DBS) and 4′-monobromsalicy Ianilide (4′MBS) are produced by irradiating 3,5,4′-tribromsalicylanilide (TBS) and 5,4′DBS respectively in vitro. By further irradiation a coloured product is produced.
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Archives of Dermatology, 1972
Photoallergy can be defined as an acquired altered reactivity of the skin presumably dependent on the development of circulation antibodies or cell-mediated immune responses. In contrast to phototoxic reactions, photoallergic responses are uncommon and consist clinically of immediate urticarial or delayed papular and eczematous lesions.
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Photoallergy can be defined as an acquired altered reactivity of the skin presumably dependent on the development of circulation antibodies or cell-mediated immune responses. In contrast to phototoxic reactions, photoallergic responses are uncommon and consist clinically of immediate urticarial or delayed papular and eczematous lesions.
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Reviews on Environmental Health, 2014
Abstract Photoallergic contact dermatitis (PACD) is a hypersensitivity reaction mounting from skin exposure to generally harmless amounts of ultraviolet and/or visible light in the presence of a photoreactive allergen. These reactions are typically delayed type (Gell and Coombs type IV) reactions and require pre-sensitization to photoallergens ...
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Abstract Photoallergic contact dermatitis (PACD) is a hypersensitivity reaction mounting from skin exposure to generally harmless amounts of ultraviolet and/or visible light in the presence of a photoreactive allergen. These reactions are typically delayed type (Gell and Coombs type IV) reactions and require pre-sensitization to photoallergens ...
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Photoallergies to Fenticlor and Multifungin
Archives of Dermatology, 1967Photoallergy to fenticlor (S7) in three patients and to Multifungin in four patients is reported. Fenticlor (bis[2-hydroxy-5-chlorphenyl] sulfide), is related chemically to bithionol. Multifungin (5-bromo-4′-chlorosalicylanilide), is related chemically to tribromosalicylanilide. Fenticlor and Multifungin are used as antifungal applications in Australia.
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Revue Française d'Allergologie et d'Immunologie Clinique, 2008
Photosensitivity reactions group together reactions to sunlight, in which the pathophysiology involves the subject's immune system. Concerning exogenous photosensitivity reactions, the photosensitizing molecules responsible for their development have been definitively identified and the reactions are known to be a form of classical delayed ...
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Photosensitivity reactions group together reactions to sunlight, in which the pathophysiology involves the subject's immune system. Concerning exogenous photosensitivity reactions, the photosensitizing molecules responsible for their development have been definitively identified and the reactions are known to be a form of classical delayed ...
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PHOTOCHEMICAL TRANSFORMATIONS IN SALICYLANILIDE PHOTOALLERGY
Photochemistry and Photobiology, 1988Abstract—The photochemical transformations of 3,3′,4′,5‐tetrachlorosalicylanilide, have been characterized by isolation and spectroscopic determination of the primary and secondary photoproducts. The photoreactivity cleanly involves photochemical dechlorination; three chlorines are ultimately lost in an efficient stepwise fashion.
Jennie L. Wells +2 more
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Phototoxicity, Photoallergy, and Photoskin Tests
Archives of Dermatology, 1959Heat, cold, trauma, and light are the physical agents concerned in the production of physical hypersensitivity. Physical hypersensitivity to light is the most important and the most common of the dermatoses caused by these physical agents. Light is the etiologic agent in polymorphic light eruptions, solar urticaria, contact photodermatitis, and ...
William L. Curwen, Otis F. Jillson
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Cellular Reactions in Contact Photoallergy
International Archives of Allergy and Immunology, 1971The nature of the cellular reactions underlying contact photoallergy to a salicylanilide compound has been examined. The typical dermal mononuclear cell infiltrate in positive photopatch tests has been shown to consist of cells staining negatively for lysosomal hydrolytic enzymes.
W.M. Sams, P.S. Herman
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In vitro-Untersuchungen zur Chlorpromazine (CPZ)-Photoallergie
Archiv f�r Klinische und Experimentelle Dermatologie, 1970Chlorpromazin (CPZ) bildet unter Aufnahme von Lichtquanten Radikale, die zu einer zunachst reversiblen, spater stabilen Dimersierung fuhren. Im radikalen Zustand vermag sich CPZ mit biologischen Substraten zu koppeln. Die Bindung mit Proteinen bildet die Grundlage zur Photoallergie, diejenige mit RNS zur phototoxischen Wirkung und diejenige mit ...
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