10.6084/m9.figshare.5766300.v1 Su Jeong Ha Su Jeong Ha Joon Park Joon Park Jangho Lee Jangho Lee Kyung-Mo Song Kyung-Mo Song Min Young Um Min Young Um Suengmok Cho Suengmok Cho Sung Keun Jung Sung Keun Jung Rice bran supplement prevents UVB-induced skin photoaging <i>in vivo</i> Taylor & Francis Group 2018 Rice bran supplement (RBS) anti-wrinkle photoaging matrix metalloproteinase-13 (MMP-13) cyclooxygenase-2 (COX-2) 2018-01-08 08:56:39 Journal contribution https://tandf.figshare.com/articles/journal_contribution/Rice_bran_supplement_prevents_UVB-induced_skin_photoaging_i_in_vivo_i_/5766300 <p>Although rice bran consumption is reportedly has numerous beneficial effects on human health, the relationship between rice bran and the prevention of photoaging has not been investigated in detail. We sought to investigate whether consumption of rice bran supplement (RBS) can elicit preventive effects against UVB-induced photoaging <i>in vivo</i>. Dorsal skin sections of hairless mice were exposed to UVB over 16 weeks. RBS consumption suppressed UVB-induced wrinkle formation and inhibited the loss of water content and epidermal thickening in the mouse skin. Western blot and immunohistochemical analyses revealed that repeated exposure to UVB upregulated matrix metalloproteinase-13 (MMP-13) and cyclooxygenase-2 (COX-2) expression, while consumption of RBS suppressed MMP-13 and COX-2 expression, as well as mitogen-activated protein kinase (MAPK) signaling pathways. These findings suggest that RBS could be a potential bioactive ingredient in nutricosmetics to inhibit wrinkle formation and water content loss via the suppression of COX-2 and MMP-13 expression.</p> <p>Effect of RBS on UVB-irradiated COX-2 and MMP-13 expression in SKH-1 hairless mouse skin.</p>