Background Nowadays, atmospheric pollutants, ultraviolet rays, and other factors cause the imbalance of cell redox, resulting in skin oxidative damage. There is an interaction between inflammatory response and oxidative stress, which often involve networks of reactions and serve to amplify each other. Quercetin and quercitrin, with strong antioxidant and anti-inflammatory properties, were widely applied in cardiovascular disease, osteoporsis, pulmonary disease, etc. However, the regulation mechanism of quercetin and quercitrin on various inflammatory skin diseases is still not clear. Purpose In this study, quercetin and quercitrin were used to investigate whether they had anti-inflammatory and anti-ROS effects. Besides, theoretical calculation method was also adopted to preliminarily explore the mechanism of the anti-inflammatory and antioxidant effects of these two substances. Methods CCK-8 assay was employed to investigate the cytotoxicity. The concentration of NO measured by Griess Reaction System. Moreover, the inflammatory factors (TNF-α, IL-1β, and IL-6) were reduced in LPS-stimulated RAW264.7 cells were tested by ELISA kits. The trend of ROS changes was detected by DCFH-DA method. Finally, the mechanism of the anti-inflammatory and antioxidant effects of these two substances was carried out by DMol3 package in Materials Studio. Results CCK-8 assay results guided that the safe concentration of quercetin and quercitrin was lower than 15.0 μg/mL and 22.4 μg/mL, respectively. Also, the concentration of NO could significantly be inhibited by quercetin and quercitrin. Besides, the ELISA results showed that TNF-α, IL-1β, and IL-6 were reduced in LPS-stimulated RAW264.7 cells after interfering with quercetin and quercitrin. The trend of ROS changes was similar to that of inflammatory factors. Finally, the theoretical calculation illustrated that the oxygen atom on B rings may be the main site of electron cloud density changes, which may suggest a possible mechanism for the anti-inflammatory and ROS scavenging effects of quercetin and quercitrin. Conclusions This experiment shows that LPS can induce the overactivating of macrophages and the activated macrophages can subsequently induce inflammatory storms and oxidative stress. Both quercetin and quercitrin can inhibit LPS-induced macrophage inflammation and oxidative stress by experiment and theoretical calculations.

A TiO2/SiO2 composite prepared by the sol-gel route can produce highly emissive broadband room-temperature phosphorescence at an excitation wavelength of 403 nm. The white phosphorescence of TiO2/SiO2 could be quenched by H2O2. The phosphorescence quenching effect demonstrated excellent sensitivity and high selectivity to H2O2. Furthermore, the phosphorescence of TiO2/SiO2 can be recovered when it is dipped in a hydroxylamine hydrochloride solution. Therefore, the TiO2/SiO2 was used to develop a reproducible phosphorescence sensor for H2O2. It has been successfully applied to the determination of H2O2 in the enzymatic catalytic reaction and real samples.

Protein extracts from medium of ADSCs presented anti-aging and whitening efficacy via microneedles on Asian skin without skin adverse side.

Introduction: Several techniques, including the use of radiofrequency (RF) devices, are currently utilized for the treatment of skin aging. This study aimed to evaluate the anti-aging effects imparted by a home-based RF beauty device and to compare these results with those of a marketed anti-aging cosmetic in vivo. Methods: Thirty-three women aged 35-60 years were enrolled in this randomized, controlled, split-face trial. This study involved a 12-week trial with five repeated measurements (at baseline, 2, 4, 8 and 12 weeks). One side of the face was randomly selected to be part of the experimental group and treated with the RF beauty device, while the other side was considered as control and was treated with an anti-aging cosmetic. Treatment safety was evaluated. Skin wrinkles, hydration, radiance, elasticity, color and thickness were evaluated using noninvasive equipment. Results: Thirty-two participants completed the study; one withdrew for personal reasons. Compared with the anti-aging cosmetic-treated facial side, the experimental side showed statistically significant improvements in wrinkles, skin radiance, color and thickness (p \ 0.05). Conclusions: The home-based RF beauty device was safe and effective for rejuvenation. The device was more effective than the commercially available anti-aging cosmetics.

Summary Background Excessive free radicals, generated from the metabolic reaction in organisms, have been implicated in many human diseases as well as aging process. Nowadays, many synthetic substances have been developed as anti‐oxidation cosmetic ingredients. However, man‐made antioxidants often have certain toxicity and side effects, which make their application under strict control. Therefore, more and more researchers focus on natural antioxidants because of their advantages. Aims In this study, CE obtained from natural Chinese medicine was used to investigate whether it had antioxidant effect in vitro and repair effect on HaCaT cell damage caused by UVB. Methods UV‐Vis and HPLC were adopted for qualitative and quantitative analysis of CE. We investigated the antioxidant potential of CE by assessing its ABTS+, DPPH•, hydroxyl (OH•), and superoxide anions (O2·-) free‐radical quenching ability. The safety of CE was studied by CCK‐8 assay. To evaluate the anti‐oxidation effect of CE on UVB‐induced damage on HaCaT cells, superoxide dismutase (SOD) activity, and malondialdehyde (MDA) content were tested. Results Experiment data showed that the CE displayed high scavenging ability: ABTS+, DPPH•, OH•, and O2·- quenching rates were 88%, 64%, 94%, and 58%, respectively. Furthermore, after UVB radiation (30 mJ/cm2), adding CE (50‐500 μg/mL) could increase the SOD activity in HaCaT cells and reduce the MDA contents. Conclusions All results illustrate that the CE shows significant antioxidant effect on scavenging free radicals in vitro. Besides, the CE can repair UVB‐induced oxidant damage by improving SOD activity and reducing MDA content.