Scheibner A, Hollis D E, McCarthy W H, Milton G W
Photodermatol. 1986 Feb;3(1):15-25.
The effects of 12 daily, half-hour exposures to sunlight on epidermal Langerhans cells (LC), and melanocytes were studied in 31 healthy volunteers. Nineteen were of Celtic and 12 of mixed European descent. Sunlight appeared to have both a direct, transient, detrimental effect and an indirect stimulating effect on the LC, and a direct and an indirect stimulating effect on the melanocytes. The mixed Europeans had a somewhat greater increase in the melanocyte population density following exposure to sunlight than the Celts. However, the number of LC fell following sunlight exposure regardless of the melanocyte response. Thus the melanocytes did not appear to provide the LC with immediate protection from ultraviolet light.
在31名健康志愿者中，研究了每日12次、每次半小时暴露于阳光下对表皮朗格汉斯细胞（LC）和黑素细胞的影响。其中19人是凯尔特人后裔，12人是欧洲混血后裔。阳光似乎对LC有直接、短暂的有害影响和间接的刺激作用，对黑素细胞有直接和间接的刺激作用。与凯尔特人相比，欧洲混血儿在暴露于阳光下后黑素细胞群体密度的增加幅度略大。然而，无论黑素细胞的反应如何，暴露于阳光下后LC的数量都会下降。因此，黑素细胞似乎并未为LC提供即时的紫外线防护。
