COMPOSITION OF BIOLOGICALLY ACTIVE SUBSTANCES AND ANTIRADICAL ACTIVITY OF EXTRACTS FROM FIVE SPECIES OF PLANTS OF THE ASPARAGACEAE FAMILY

Many members of the Asparagaceae family are used in traditional medicine in different countries and characterized by a high content of biologically active metabolites. In this work, the qualitative composition and quantitative content of the components of methanol extracts from leaves and underground organs of Sansevieria cylindrica Bojer ex Hook, Sansevieria trifasciata Prain, Polianthes tuberosa L., leaves of Yucca filamentosa L. and Furcraea gigantea var. watsoniana (Hort. Sander) Drumm. were determined. Extraction of plant leaves and underground organs using 80% methanol resulted in 5.2-16.7% and 16-25.1% of the total extractive substances consequently. The presence of steroidal saponins in the extracts was shown by thin layer chromatography. Spirostanol saponins were predominate in the extracts from leaves of Y. filamentosa, F. gigantea and underground organs of S. cylindrica, S. trifasciata, P. tuberosa, furastanol saponins - in the extracts from leaves of S. cylindrica and S. trifasciata. The content of terpenoid and phenolic compounds in the extracts established using spectrophotometry significantly differs depending on the plant species and their anatomical part. All the extracts tested exhibited inhibition of the 2,2-diphenyl-1-picrylhydrazyl free radical in dose-dependent manner. The highest antiradical activity demonstrated the extract from the leaves of Y. filamentosa (IC50 = 25.95 μg/ml) containing the largest amount of phenolic compounds, including flavonoids - 51.3 and 15.5% of the total extractive substances

Cytotoxic and Apoptosis-Inducing Activity of Plants from the Family Asparagaceae in Relation to Human Alveolar Adenocarcinoma Cells

Cancer is known as the second major mortality cause. The number of new cases is increasing every year. Thus, it is urgent for scientists to search for alternative drugs with selective antitumor action and minimal side effects. It is known that some plant metabolites exhibit antioxidant, cytotoxic, and antitumor activity, while at the same time being less toxic than modern allopathic drugs. In this work, we have investigated the cytotoxic and apoptosis-inducing effects of extracts obtained from plants of the family Asparagaceae on A549 human lung adenocarcinoma cells. The analysis has been performed using flow cytofluorometry. If extracts showed cytotoxicity, the apoptosis-inducing action has been evaluated at the concentration of 50 μg/mL; in other cases, the analyzed concentration range was 50–300 μg/mL. On the basis of the experiments carried out, the following conclusions have been made. Extracts of the leaves and rhizomes of Sansevieria cylindrica and Sansevieria trifasciata do not possess antitumor activity. Extracts of the leaves of Polianthes tuberosa and Furcraea gigantea, which were cytotoxic at high concentrations, cause cell death at 50 μg/mL in the amount of 21.35 ± 1.86 and 15.6 ± 3.23, respectively. Extracts of Polianthes tuberosa bulbs and Yucca filamentosa leaves are able to induce apoptosis at higher concentrations. When the concentration reaches 100 μg/mL, the proportion of apoptotic cells for these plants is 45.76 ± 1.34 and 11.33 ± 0.07, respectively. The number of dead cells at the concentration of 300 μg/mL increased up to 73.33 ± 3.05 and 81.75 ± 4.07. The results have great importance for development of new drugs based on metabolites from these plant extracts