Ribes nigrum L. Prevents UVB-mediated Photoaging in Human Dermal Fibroblasts: Potential Antioxidant and Antiinflammatory Activity.

Black currants (Ribes nigrum L, RN) are known as a "super fruit" to possess for their many potential health benefits such as the alleviation of oxidative stress-related disorders. However, little skin photoaging-related research has been done on the use of this agent. In the present study, we investigated the protective effects of RN in UVB-irradiated human dermal fibroblasts (NHDFs). RN treatment in UVB-irradiated skin models alleviated UVB-mediated photoaging through several mechanisms: Treatment with RN downregulated MAPK-related signaling models, such as those of activation protein 1 (AP-1) and nuclear factor kappa B (NF-κB). In addition, phase II gene heme oxygenase-1 (HO-1) was modulated by the increase in nuclear factor erythroid 2-related factor 2 (Nrf2) in the nuclear, and finally, transforming growth factor TGF-β was upregulated in vitro. Further study indicated that UVB-induced production of MMP-1 and IL-6 could be inhibited by PD 98059 (an inhibitor of ERK) and SP600125 (an inhibitor of JNK). Thus, RN improved the expression of type I procollagen and inhibited UVB-induced MMP-1 and IL-6 secretion through inactivating MAPK cascades. Therefore, RN is a suitable target for further investigation as an antiphotoaging agent and may have applications in the skincare industry.