Abstract
Lophatherum gracile extract(LG)was taken as the research object,and evaluated respectively from two dimensions of efficacy and safety,so as to enhance its application prospect in the field of cosmetics.Eye irritation and skin irritation were evaluated by chick embryo chorioallantoic membrane experiment(HET-CAM)and human patch test.The transient potential receptor vanillate subtype 1(TRPV1)was highly expressed in the cell model,and the influence of the expression of interleukin 8(IL-8)and monocyte chemotactic factor(MCP-1)were measured.Sensitivity skin stimulation models were established using sodium dodecyl sulfate,lactic acid and capsaicin and to determine its ability to relieve skin sensitivity.HET-CAM and human patch test show that LG has good eye safety and skin safety.In the cell model with over-expression of TRPV1,LG can reduce the over-expression of IL-8 and MCP-1 in a dose-dependent manner.In human evaluation,LG can significantly reduce the transepidermal water loss rate(TEWL)and skin erythema index(EI)increase caused by SDS(p<0.05),instantly alleviate skin irritation caused by lactic acid stimulation,significantly reduce skin discomfort and redness caused by capsaicin stimulation,indicating that LG can accelerate the repair of damaged skin and enhance the barrier function of sensitive skin(p<0.05).The results of Therefore,as an active raw material of plant origin,LG has the characteristics of high efficiency,strong effect and safety,which can be widely used in the development of skin care product.
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