In Vitro Study on the Soothing and Oil Control Efficacy of P-Hydroxyacetophenone

p-Hydroxyacetophenone(p-HAP)was used as preservatives in cosmetics recently,their new efficacy was rarely reported.Here,We evaluate the soothing and oil control efficacy of p-HAP in vitro cells,providing a new efficacy basis for its application in cosmetics.The content of nitric oxide(NO),tumor necrosis factor-α(TNF-α)and interleukin-6(IL-6)were determined in LPS-induced RAW264.7 and lipid contents were determined in testosterone-induced SZ95.The results revealed that p-HAP attenuated pro-inflammatory cytokines,such as NO,TNF-αand IL-6(P<0.01).Simultaneously,0.05mg/mL of p-HAP also inhibited the formation of lipid droplets in human sebocytes,with 17.64%of inhibition(P<0.001).These findings may be beneficial in the application of p-HAP as an efficacy ingredient in cosmetics,which may have a soothing and oil control efficacy according to the inhibition of pro-inflammatory cytokines and lipid contents.

Research of Several Evaluation Methods of Soothing Efficacy in Cosmetics

In order to search an appropriate evaluation method for the soothing effect of cosmetics,the LPS-induced macrophage model,SDS-stimulated zebrafish embryos model and the clinical assessment were used.The results showed that the concentration of NO and IL-6 was significantly reduced in LPS-induced RAW264.7 cells when applied to two essences.The inhibition rate of NO-release was 85.87%and 84.57%,while IL-6 was 44.18%and 38.76%,respectively.Furthermore,the spontaneous rotating of zebrafish embryos was significantly decreased to 51.85%and 76.54%in SDS-stimulated zebrafish embryos model.In the 28 days of clinical assessment,the concentration of hydration was significantly increased to 55.56%and 39.61%,while the erythrodesis was significantly decreased to 4.75%and 6.68%.This indicates that the three evaluation methods of soothing efficacy in this research were effective,and can be used in the evaluation of cosmetics.

Antioxidant Activity and Soothing Efficacy of Tambourissa Trichophylla Leaf Extract in Vitro Study

Present study is aimed to investigate in vitro biological efficacy of Tambourissa trichophylla leaf extract(TTLE),a plant-derived ingredient in cosmetic,on antioxidant activity and soothing efficacy.The total phenols content of TTLE was determined by the Folin-Ciocalteu method,antioxidant activity was tested by DPPH free radical scavenging assay,hyaluronidase inhibition activity was performed by using in vitro enzyme inhibitory assays based on spectrophotometric evaluation,and the soothing efficacy of TTLE was performed by the expression of nitric oxide(NO)and interleukin-6(IL-6)produced by LPS-induced RAW264.7 cells.The results shown that the total phenolic content of TTLE was as high as 54%,the DPPH scavenging activity was 81.18%at the concentration of 25μg/mL,the hyaluronidase inhibition activity was 69.04%at the concentration of 5 mg/mL,and the inhibition of NO and IL-6 were 15.70%and 76.57%at 0.05 mg/mL,respectively.TTLE has a high content of total phenols,high antioxidant activity and soothing effects,which indicated that TTLE was a promising ingredient in the development and application of cosmetics.