Repository Citation
Schmeusser, Benjamin; McGlone, Cameron; and Travers, Jeffrey B., "UVB-Induced Microvesicle Particle Release in Human Skin in vivo is Diminished Following Oral Vitamin C and E Antioxidant Administration" (2021). Medical Student Research Symposium Abstracts and Posters. 2.
https://corescholar.libraries.wright.edu/msrs/2021/poster_presentations_3/2
Start Date
29-4-2021 7:15 PM
End Date
29-4-2021 7:25 PM
Document Type
Poster
Description
An important question in photobiology asks how Ultraviolet B (UVB, 290 – 320 nm) radiation, which mostly absorbs in the outer epidermis of skin, can generate a systemic response such as immunosuppression. Previous in vitro and ex vivo studies demonstrate UVB-dependent release of bioactive molecule-containing microvesicle particles (MVPs) from keratinocytes. Furthermore, MVP release is diminished upon antioxidant administration. The purpose of this study is to examine UVB-induced MVP release and antioxidant response in vivo. In this IRB-approved study, 8 male participants with Fitzpatrick type I or II skin were treated with 1000 J/m2 UVB irradiation to a 5 by 5 mm area of volar forearm skin. 4 hours later, punch biopsies and erythema measurements were performed. This procedure was repeated 8 days later following a course of oral antioxidants (vitamin C 2g/day, vitamin E 1000IU/day). On average, tissue MVP release increased 1.8-fold (+/- 0.31, P = 0.02) following UVB treatment. Following a course of oral antioxidants, the average UVB-induced tissue MVP release did not differ from the control (0.9-fold +/- 0.13, P = 0.23). There was no significant change in UVB-induced erythema between pre- and post-antioxidant administration. These studies suggest that UVB-MVP are dependent upon reactive oxygen species.
Abstract - Schmeusser
UVB-Induced Microvesicle Particle Release in Human Skin in vivo is Diminished Following Oral Vitamin C and E Antioxidant Administration
An important question in photobiology asks how Ultraviolet B (UVB, 290 – 320 nm) radiation, which mostly absorbs in the outer epidermis of skin, can generate a systemic response such as immunosuppression. Previous in vitro and ex vivo studies demonstrate UVB-dependent release of bioactive molecule-containing microvesicle particles (MVPs) from keratinocytes. Furthermore, MVP release is diminished upon antioxidant administration. The purpose of this study is to examine UVB-induced MVP release and antioxidant response in vivo. In this IRB-approved study, 8 male participants with Fitzpatrick type I or II skin were treated with 1000 J/m2 UVB irradiation to a 5 by 5 mm area of volar forearm skin. 4 hours later, punch biopsies and erythema measurements were performed. This procedure was repeated 8 days later following a course of oral antioxidants (vitamin C 2g/day, vitamin E 1000IU/day). On average, tissue MVP release increased 1.8-fold (+/- 0.31, P = 0.02) following UVB treatment. Following a course of oral antioxidants, the average UVB-induced tissue MVP release did not differ from the control (0.9-fold +/- 0.13, P = 0.23). There was no significant change in UVB-induced erythema between pre- and post-antioxidant administration. These studies suggest that UVB-MVP are dependent upon reactive oxygen species.
