Comparative Quantitative Study of Ardisiacrispin A in Extracts from Ardisia crenata Sims Varieties and Their Cytotoxic Activities.

Ardisia crenata Sims (Primulaceae) occurs in natural habitats in two varieties, bearing red or white fruits. While roots of the red-berried ardisia are valued as a medicinal product, the pharmacological activity of which is attributed to triterpene saponins, including ardisiacrispin A, data on the white-berried variety are scarce. A TLC-densitometric method was developed and validated to estimate the levels of saponins, calculated as ardisiacrispin A, in different plant parts in both varieties. Their content amounted to 22.17±4.75 and 25.72±1.46 mg/g d.w. in roots, and 2.64±0.74 and 3.43±0.70 mg/g d.w. in fruits of red-berried and white-berried ardisia, respectively. Assessment of cytotoxicity of ardisiacrispin A and A. crenata extracts on a panel of human cancer cell lines revealed a similar effect of root extracts from both varieties, with the highest potency against melanoma WM793 and colon cancer Caco2. Thus, roots of the white-berried variety may be treated as a substitute for red-berried ardisia and serve as an alternative source for the acquisition of plant material rich in bioactive saponins.