紅景天苷及其苷元酪醇是存在于紅景天屬、越桔屬、杜鵑花屬、女貞屬等植物中的天然抗氧化劑，通過提高細(xì)胞的抗氧化能力，清除活性氧，調(diào)控炎性細(xì)胞因子表達(dá)和抑制炎癥介質(zhì)合成，從而產(chǎn)生抗炎作用和防止癌變的發(fā)生。紅景天苷能上調(diào)幾種細(xì)胞周期蛋白依賴激酶抑制因子表達(dá)，減少細(xì)胞周期蛋白依賴激酶Cdc2和細(xì)胞周期蛋白B1表達(dá)，使癌細(xì)胞周期滯留在G₂期，抑制癌細(xì)胞生長。紅景天苷對非特異性免疫、體液免疫和細(xì)胞免疫均有提高作用，也能對抗免疫抑制劑對骨髓造血功能的抑制。女貞子中的紅景天苷和酪醇含量亦很高，因此應(yīng)加強(qiáng)來源植物女貞子的化學(xué)、藥理和藥效研究。

Salidroside and its aglycone tyrosol are natural anti-oxidants from the plants of Ligustrum Linn., Rhododendron L., Vaccinium L., Rhodiola L., and so on. Salidroside could both produce anti-inflammation and prevent carcinogenesis through increasing the anti-oxidative potency of cells, scavenging the reactive oxygen species, modulating the expression of inflammatory cytokine, inhibiting the inflammatory mediators synthesis, and preventing the canceration. Salidroside up-regulates the expression of various cyclin-dependent kinase inhibitors, down-regulates the expression of cycin-dependent kinase Cdc-2 and cyclin B1 for the cell cycle G₂-phase retention, and results in the inhibition on the growth of cancer cells. Salidroside promotes nonspecific, humoral, and cellular immunocompetence, and antagonizes to the immunosuppressants in depressing the hematopoietic function of the bone marrow. The contents of salidroside and tyrosol are considerably high in Ligustri Lucidi Fructus, and so it is significant to strengthen the studies of Ligustri Lucidi Fructus in chemistry, pharmacology, and pharmacodynamics.