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Updated: Mar 22, 2026
Author Spotlight: Discovering New Biopesticides from Bioactive Soil Microbe-Derived Natural Products
Published on: July 26, 2024
TLC-Bioautography-Guided Natural Product Discovery: An Integrated Platform for Rapid Profiling of Plant-Derived
Yu-Xin Yuan1, Jian-Guo Chen1, Zhong-Duo Yang1,2
1School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, China.
Introduction:
Phosphodiesterase (PDE) inhibitors are important therapeutic targets. There is a need for rapid and efficient screening methods to identify novel PDE inhibitors from complex natural product extracts.
Objective:
This study aimed to develop an integrated thin-layer chromatography-bioautography (TLC-B) platform for the rapid screening and visual localization of PDE inhibitors in plant-derived samples.
Material And Methods:
Eighteen candidate substrates were synthesized and evaluated. Thymidine 5'-monophosphate-α-naphthyl ester was selected as the optimal enzymatic substrate via HPLC-UV analysis, with Solid Violet B as the chromogenic agent. A four-step TLC-B protocol was established involving separation, sequential spraying of enzyme/substrate solutions, incubation (45°C, 40 min), and visualization. The method was validated using vincristine as a control.
Results:
The validated method showed high sensitivity, detecting vincristine at 6.25 μg/spot as distinct white inhibition zones against a pink background. Application to an ethyl acetate extract of Lilium pumilum endophyte Z-SDBHTR-4 successfully localized the following three bioactive compounds: curvulinic acid (T1), O-methylcurvulinic acid (T2), and methyl curvulinate (T3).
Conclusion:
The developed TLC-B platform effectively combines chromatographic separation with bioactivity mapping, creating a streamlined workflow for the discovery of natural product-based enzyme inhibitors. It demonstrates significant potential for accelerating pharmaceutical development.
