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Three new triterpene esters from pumpkin (Cucurbita maxima) seeds
Takashi Kikuchi1, Shinsuke Ueda1, Jokaku Kanazawa1
1Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka, 569-1094, Japan.
Molecules (Basel, Switzerland)
|April 19, 2014
Summary
Researchers isolated three new triterpene esters from pumpkin seeds. One compound showed significant melanogenesis inhibition, while two others displayed weak cytotoxicity against cancer cell lines.
Area of Science:
- Natural Product Chemistry
- Phytochemistry
- Organic Chemistry
Background:
- Cucurbita maxima seeds are a source of bioactive compounds.
- Triterpene esters represent a class of natural products with diverse biological activities.
Purpose of the Study:
- To isolate and characterize new multiflorane-type triterpene esters from Cucurbita maxima seeds.
- To evaluate the melanogenesis inhibitory and cytotoxic activities of the isolated compounds.
Main Methods:
- Isolation and purification of compounds using chromatographic techniques.
- Structure elucidation of new compounds via spectroscopic methods (NMR, MS).
- In vitro assays for melanogenesis inhibition and cytotoxicity (HL-60, P388 cell lines).
Main Results:
- Three new multiflorane-type triterpene esters (1-3) and one known compound (4) were identified.
- Compound 1 demonstrated melanogenesis inhibitory activity comparable to arbutin.
- Compounds 1 and 3 exhibited weak cytotoxicity against HL-60 and P388 cells (IC50: 34.5-93.7 μM).
Conclusions:
- Cucurbita maxima seeds yield novel bioactive triterpene esters.
- Compound 1 shows potential as a skin-lightening agent.
- Compounds 1 and 3 possess mild cytotoxic properties, warranting further investigation.
