Related Experiment Videos
Bioactive secolignans from Peperomia dindygulensis
Jian-Lin Wu1, Na Li, Toshiaki Hasegawa
1Graduate School of Science and Technology, Niigata University, Ikarashi, Niigata 950-2181, Japan.
Journal of Natural Products
|May 27, 2006
Summary
Eight new secolignans from Peperomia dindygulensis show potential anticancer activity. Some compounds inhibited lung and liver tumor cells and reversed multidrug resistance, offering new therapeutic leads.
Area of Science:
- Natural Product Chemistry
- Pharmacology
- Medicinal Chemistry
Background:
- Peperomia dindygulensis is a plant source of bioactive natural products.
- Secolignans represent a class of compounds with diverse biological activities.
- Understanding the chemical constituents and pharmacological properties of P. dindygulensis is valuable for drug discovery.
Purpose of the Study:
- To isolate and characterize secolignans from the EtOAc extract of Peperomia dindygulensis.
- To evaluate the cytotoxic and multidrug resistance (MDR) reversal activities of the isolated compounds.
- To investigate the inhibitory effects on intercellular adhesion molecule-1 (ICAM-1) induction.
Main Methods:
- Isolation of thirteen secolignans, including eight new compounds, using chromatographic techniques.
- Structure elucidation via 1D and 2D NMR, MS, NOE correlations, optical rotations, and CD spectra.
- In vitro assays for cytotoxicity, MDR reversal (calcein accumulation), and ICAM-1 inhibition.
Main Results:
- Eight new secolignans (1-8) were identified alongside five known compounds.
- Compounds 6, 7, peperomin B (10), and peperomin E (12) exhibited significant cytotoxicity against malignant lung tumor cells (VA-13).
- Compounds 5, 7, peperomins A, B, C, and E (9-12) demonstrated MDR reversal activity, while compounds 2, 3, 7, and peperomin E (12) inhibited ICAM-1 induction.
Conclusions:
- The EtOAc extract of Peperomia dindygulensis is a rich source of bioactive secolignans.
- Several isolated secolignans display promising cytotoxic, MDR reversal, and anti-inflammatory (ICAM-1 inhibition) properties.
- These findings highlight the potential of P. dindygulensis-derived secolignans as leads for developing novel anticancer and anti-inflammatory agents.