Summary
Vitiliginous patients undergoing photochemotherapy with TMP were less susceptible to a sun burn. To investigate this point, the MED for UV-B was measured before, 2 h, and 24 h after oral intake of TMP in 10 healthy volunteers. There was an increase of MED when UV exposure had taken place 2 h after TMP intake (P<0.01). This was no longer detectable when the exposure had taken place 24 h after intake. MED increase was 11.8% for 0.19 mg/kg TMP, 21.0% for 0.37 mg/kg, and 23.7% for 0.74 mg/kg. This dosedependence was significant (P<0.01). The protective effect of TMP against UV-B erythema seemed related to UV absorption by the drug while it was in the blood stream.
Zusammenfassung
Patienten mit Vitiligo zeigten unter Photochemotherapie mit TMP eine verminderte Neigung zum Sonnenbrand. Um diese Tatsache zu untersuchen, wurde die MED für UV-B-Strahlen bei zehn gesunden Testpersonen vor der oralen Einnahme von TMP, 2 h und 24 h danach bestimmt. Fand die UV-Exposition 2 h nach Einnahme von TMP statt, wurde eine Erhöhung der MED festgestellt (P<0,01), während die MED bei einer UV-Exposition 24 h nach der Einnahme von TMP nicht mehr bestimmt werden konnte. Die Erhöhung der MED betrug 11,8% bei 0,19 mg/kg TMP, 21,0% bei 0,37 mg/kg und 23,7% bei 0,74 mg/kg. Diese Abhängigkeit von der Dosis war signifikant (P<0,01). Der schützende Effekt von TMP gegen das UV-B-Erythem könnte der UV-Absorption durch dieses Medikament zugeschrieben werden.
Similar content being viewed by others
Abbreviations
- (MED):
-
Minimal Erythemal Dose
- (UV-B):
-
Ultra Violet B rays
References
Aubry J, Laurent R, Bidard de la Noe AM, Agache P (1974) Vitiligo et triméthylpsoralène. Bull Soc Fr Dermatol 81:5–12
Bleehen SS (1972) Treatment of vitiligo with oral 4-5′-8 trimethylpsoralen (Trisoralen). Br J Dermatol 86:54–60
Carter DM (1975) Biologic effect of photomediated of trimethylpsoralen to DNA. J Invest Dermatol 64:288–289
Dall'Acqua F, Marciani S, Vedaldi D, Rodighiero G (1974) Skin photosensitization and cross-linkings formations in native DNA by furocoumarins. Section C: Biochemie, Biophysik, Biologie, Virologie 29c: 9–10:635–636
Dawber RPR (1970) Oral Trisoralen therapy in vitiligo. Br J Dermatol 83:386–390
El Mofty AM (1948) A priliminary clinical report on the treatment of leucoderma with Ammi Majus Linn. J Royal Egypt Med Assoc 31:651–655
El Mofty AM (1968) Vitiligo and psoralens. Pergamon Press, Oxford
Feillet H (1977) Les photosensibilisants. Cutis 1:407–419
Houset S (1977) L'érythème ultraviolets. Etude du spectre d'action et de la dose érythémateuse minimale (DEM) en lumière manochromatique. Med thesis, University of Lille, France
Jimbow K, Kaidberg KH, Pathak MA, Parrish JA, Kligman M, Fitzpatrick TB (1974) Melanin pigmentation stimulated by UV-B, UV-A, and psoralens. J Invest Dermatol 62:548
Jung EG (1970) La lampe au xénon, moyen très simple pour déceler les photo-allergies. Informations — Recherches et techniques 2:63–64
Kaidbey KH, Kligman AM (1974) Photopigmentation with Trisoralen. Arch Dermatol 108:674–677
Karsenty G (1973) Nouvelle possibilité thérapeutic dans l'albinisme universel. Med. Thesis, University of Besançon, France
Magnus IA (1976) Dermatological photobiology. Blackwell Sci Publ, London
Musajo L, Rodighiero G, Mode of photosensitizing action of furocoumarins, Photophysiology, vol 3. Giese, New York, pp 115–144
Pathak MA, Kramer MD, Fitzpatrick TB (1974) Photobiology and photochemistry of furocoumarins (psoralens) In: Fitzpatrick TB, Pathak MA, Harber LD, Seiji M, Kurita A (eds) Sunlight and man. University of Tokyo Press, Tokyo, pp 335–368
Warin AM (1978) The ultra-violet erythemas in man. Br J Dermatol 98:473–477
Wolff K, Gschnait F, Honigsmann H, Konrad K, Parrish JA, Fitzpatrick TB (1977) Phototesting and dosimetry for photochemotherapy. Br J Dermatol 96:1–10
Author information
Authors and Affiliations
Additional information
This study was supported by a grant of the University of Besançon, Microtechniques Service
Rights and permissions
About this article
Cite this article
Agache, P.G., Coupez, L. Protective effect of trimethylpsoralen against UV-B erythema. Arch Dermatol Res 268, 85–89 (1980). https://doi.org/10.1007/BF00403890
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00403890