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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 262 (1978), S. 55-61 
    ISSN: 1432-069X
    Keywords: DNA-repair levels ; Fibroblasts ; Actinic keratosis ; DNA-synthesis ; DNA-Repair ; Fibroblasten ; Aktinische Keratose ; DNA-Synthese
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Mittels der Autoradiographietechnik wurde die Ultraviolett induzierte DNA-Synthese von Fibroblasten der Haut bei 12 Patienten mit aktinischer Keratose und 12 Kontrollpersonen des gleichen Alters untersucht. Um die regionalen Differenzen der DNA-repair zwischen den lichtexponierten und nicht lichtexponierten Körperpartien zu unterscheiden, wurden Zellen von der Stirn, vom Abdomen oder Achselhaut untersucht. Die DNA-Synthese erschien bei aktinischen Keratosen vermindert. Bei allen Probanden wurde in der lichtexponierten Haut eine aktivere DNA-repair aufgefunden. Der Zusammenhang zwischen Hautkrebs und defekter DNA-Repair ist augenscheinlich. Die erhöhte DNA-repair der dauernd lichtexponierten Haut beruht möglicherweise auf einer enzymatischen Induktion.
    Notes: Summary Autoradiographic counting technique was utilized to measure the ultraviolet-induced unscheduled DNA synthesis of skin fibroblasts from 12 patients with chronic actinic keratosis and from 12 healthy donors of about the same age. In order to reveal a possible regional difference of DNA repair between the parts of the body ordinarily exposed and those parts unexposed to sunlight, two cell strains were used for each examined subject; one developed from the forehead skin and the other from the abdominal or axillary skin. Unscheduled DNA synthesis appeared depressed in actinic keratosis patients, as compared with controls. In all examined subjects however cell strains from exposed skin showed a DNA repair more active than cell strains from unexposed skin. These findings show that skin cancer may be promoted in actinic keratosis patients by a defect of DNA repair. The exalted DNA repair of chronically sun exposed skin is probably the consequence of a defensive process caused by enzymatic induction.
    Type of Medium: Electronic Resource
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