Biomaterial Database

Effect of hypoxia on sunburn cell formation and inflammation induced by ultraviolet radiation. 1988

J I Youn, and R W Gange, and D Maytum, and J A Parrish

Department of Dermatology, Harvard Medical School, Massachusetts General Hospital, Boston.

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 resulting from vascular occlusion by ear clamping, either before or after UVB exposure, decreased formation of sunburn cells. Ear clamping alone caused significant ear swelling, which was enhanced when combined with UVB exposure. Using topical 8-methoxypsoralen + UVA (PUVA), increased sunburn cells were observed when ears were clamped for 10 min prior to UVA exposure, but not following exposure. Ear swelling caused by PUVA was also enhanced when ears were clamped during exposure. These results suggest that induction of sunburn cells by UVB is dependent on oxygen, and that UVB and PUVA induce sunburn cell formation by distinct mechanisms.

UI	MeSH Term	Description	Entries
D008812	Mice, Hairless	Mutant strains of mice that produce little or no hair.	Hairless Mice,Mice, Inbred HRS,Mice, hr,Hairless Mouse,Mice, HRS,Mouse, HRS,Mouse, Inbred HRS,HRS Mice,HRS Mice, Inbred,HRS Mouse,HRS Mouse, Inbred,Inbred HRS Mice,Inbred HRS Mouse,Mouse, Hairless
D011701	PUVA Therapy	Photochemotherapy using PSORALENS as the photosensitizing agent and ultraviolet light type A (UVA).	Psoralen Ultraviolet A Therapy,Therapy, PUVA,PUVA Therapies,Therapies, PUVA
D001799	Blood Sedimentation	Measurement of rate of settling of ERYTHROCYTES in blood.	Erythrocyte Sedimentation,Erythrocyte Sedimentation Rate,Erythrocyte Sedimentation Rates,Rate, Erythrocyte Sedimentation,Rates, Erythrocyte Sedimentation,Sedimentation Rate, Erythrocyte,Sedimentation Rates, Erythrocyte,Sedimentation, Blood,Sedimentation, Erythrocyte
D004890	Erythema	Redness of the skin produced by congestion of the capillaries. This condition may result from a variety of disease processes.	Erythemas
D006168	Guinea Pigs	A common name used for the genus Cavia. The most common species is Cavia porcellus which is the domesticated guinea pig used for pets and biomedical research.	Cavia,Cavia porcellus,Guinea Pig,Pig, Guinea,Pigs, Guinea
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D000860	Hypoxia	Sub-optimal OXYGEN levels in the ambient air of living organisms.	Anoxia,Oxygen Deficiency,Anoxemia,Deficiency, Oxygen,Hypoxemia,Deficiencies, Oxygen,Oxygen Deficiencies
D013471	Sunburn	An injury to the skin causing erythema, tenderness, and sometimes blistering and resulting from excessive exposure to the sun. The reaction is produced by the ultraviolet radiation in sunlight.	Sunburns
D014466	Ultraviolet Rays	That portion of the electromagnetic spectrum immediately below the visible range and extending into the x-ray frequencies. The longer wavelengths (near-UV or biotic or vital rays) are necessary for the endogenous synthesis of vitamin D and are also called antirachitic rays; the shorter, ionizing wavelengths (far-UV or abiotic or extravital rays) are viricidal, bactericidal, mutagenic, and carcinogenic and are used as disinfectants.	Actinic Rays,Black Light, Ultraviolet,UV Light,UV Radiation,Ultra-Violet Rays,Ultraviolet Light,Ultraviolet Radiation,Actinic Ray,Light, UV,Light, Ultraviolet,Radiation, UV,Radiation, Ultraviolet,Ray, Actinic,Ray, Ultra-Violet,Ray, Ultraviolet,Ultra Violet Rays,Ultra-Violet Ray,Ultraviolet Black Light,Ultraviolet Black Lights,Ultraviolet Radiations,Ultraviolet Ray
D051379	Mice	The common name for the genus Mus.	Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus