Change of biophysical properties of the skin caused by ultraviolet radiation‐induced photodamage in Koreans

Abstract

This study shows that in the skin of Korean subjects, changes in skin barrier function and delayed melanization do occur even in exposure to a suberythemogenic dose of SSUV. Also, given the fact that restoration of barrier function occurs as the process of melanization begins, melanization is considered to be a useful predictive indicator of the restoration of the skin barrier function after sunburn.

Sun-Induced Changes in Stratum Corneum Function Are Gender and Dose Dependent in a Chinese Population

“…Alteration in cutaneous function induced by UV radiation is determined at least in part by radiating doses [27,36] . In contrast to the previous finding that basal TEWL in photo-aged skin is similar to that in non-photoaged subjects aged 80-97 years [29] , the present studies demonstrate that daily sun exposure does induce dosedependent changes in basal TEWL, which is in agreement with previous findings [40] .…”

“…For instance, SC hydration is lower in sun-exposed sites in comparison with non-sun-exposed contralateral sites despite unchanged basal permeability barrier function [16] . Basal transepidermal water loss (TEWL) in human skin increases significantly following UVB radiations of 0.75 minimal erythema dose and is accompanied by decreased SC hydration and an increased melanin index [27] . Humans living in higher UV-exposed regions exhibit lower SC hydration [19,28] .…”

The effects of continuous application of sunscreen on photoaged skin in Japanese elderly people—the relationship with the usage

“…30 We supposed that increased TEWL by UV exposure would be lower after UV protection using sunscreen in the study. However, TEWL values of the subjects were constant throughout the study period.…”

Antioxidants and Skin Aging

“…In addition, there is a tendency for higher levels of transepidermal water loss (TEWL) at chronic UV-exposed sites than at UV-protected sites in all subjects (Wang et al 2010). Alterations of skin hydration and barrier function following UV exposure have been demonstrated by changes induced by a single UV exposure of human skin (Lim et al 2008).…”

“…A single exposure of human skin to one minimal erythema dose (MED) of solarsimulated UV radiation (SSUV) causes an abrupt increase of TEWL which is an important parameter of skin barrier function (Lim et al 2008). The elevated level of TEWL then recovers gradually to the original level within 7 days.…”