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A new triterpene from Luculia pinciana Hook.
Wen-Yi Kang1, Zhi-Zhi Du, Xiao-Sheng Yang
1Chinese Academy of Sciences, Kunming Institute of Botany, State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming, China.
Journal of Asian Natural Products Research
|December 29, 2004
Summary
A novel triterpene, luculiaoic acid A, was isolated from Luculia pinciana stems and demonstrated leukaemia cell line inhibition. Other compounds also showed antimicrobial activity against Staphylococcus aureus and Candida albicans.
Area of Science:
- Natural Product Chemistry
- Pharmacology
- Microbiology
Background:
- The stems of Luculia pinciana Hook. are a source of bioactive natural products.
- Triterpenes and other secondary metabolites often exhibit significant biological activities.
Purpose of the Study:
- To isolate and characterize compounds from Luculia pinciana stems.
- To evaluate the inhibitory activity of isolated compounds against a leukaemia cell line and microbial pathogens.
Main Methods:
- Extraction of Luculia pinciana stems using ethyl acetate.
- Isolation and structure elucidation of compounds using Nuclear Magnetic Resonance (NMR), Mass Spectrometry (MS), and Infrared (IR) methods.
- Antimicrobial susceptibility testing against Staphylococcus aureus and Candida albicans, determining Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC).
Main Results:
- A new triterpene, luculiaoic acid A, was identified, exhibiting inhibitory effects on a leukaemia cell line.
- Eleven known compounds were also isolated and characterized.
- Ursolic acid demonstrated potent inhibition against Staphylococcus aureus (MIC: 0.5 mg/mL, MBC: 10 mg/mL).
- Scopletin showed inhibitory activity against Candida albicans (MIC: 1 mg/mL, MBC: 5 mg/mL).
Conclusions:
- Luculia pinciana stems yield novel and known compounds with diverse biological activities.
- Luculiaoic acid A is a promising candidate for leukaemia research.
- Ursolic acid and scopletin possess significant antimicrobial properties against tested bacterial and fungal strains.