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A Customizable Approach for the Enzymatic Production and Purification of Diterpenoid Natural Products
Published on: October 4, 2019
Abietane diterpenoids and their biological activities from Premna herbacea Roxb
Passakorn Teerapongpisan1, Angkana Doungsanit2, Wuttichai Jaidee3
1Futuristic Science Research Center, School of Science, Walailak University, Nakhon Si Thammarat, 80160, Thailand; Research Center for Theoretical Simulation and Applied Research in Bioscience and Sensing, Walailak University, Nakhon Si Thammarat, 80160, Thailand.
Phytochemical analysis of Premna herbacea Roxb. roots yielded ten abietane diterpenoids, including five new compounds. Salvilenone showed potent alpha-glucosidase inhibition, while Bharangin exhibited cytotoxicity against lung cancer cells.
Area of Science:
- Natural Product Chemistry
- Phytochemistry
- Medicinal Chemistry
Background:
- Premna herbacea Roxb. is a plant with potential medicinal properties.
- Abietane-type diterpenoids are a class of natural products with diverse biological activities.
Purpose of the Study:
- To isolate and characterize abietane-type diterpenoids from Premna herbacea Roxb. roots.
- To evaluate the alpha-glucosidase inhibitory and cytotoxic activities of the isolated compounds.
Main Methods:
- Phytochemical investigation using spectroscopic analysis (1D and 2D NMR, HRESIMS).
- Electronic circular dichroism (ECD) calculations for structural confirmation.
- In vitro assays for alpha-glucosidase inhibition and cytotoxicity.
- In silico molecular docking studies.
Main Results:
- Ten abietane-type diterpenoids were isolated, including five novel compounds (premnaherbietones A and B, premnaherbietanes A-C).
- Salvilenone (10) demonstrated significant alpha-glucosidase inhibition (IC50 = 34.6 μM), surpassing acarbose.
- Bharangin (2) exhibited notable cytotoxicity against A549 lung adenocarcinoma cells (IC50 = 19.4 μM).
- Molecular docking supported salvilenone's inhibitory mechanism.
Conclusions:
- Premna herbacea Roxb. is a rich source of structurally diverse abietane diterpenoids.
- Salvilenone and Bharangin show promising pharmacological activities, warranting further investigation.
- A plausible biosynthetic pathway for the isolated compounds was proposed.
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