Abstract |
Fifteen secondary metabolites, including five new sesquiterpenoids (1-5), one new benzofuranoid (10), one new ophiobolin sesterterpenoid (11), and one new 3,5-dimethylorsellinic acid (DMOA)-based meroterpenoid (15), as well as seven known analogues (6-9 and 12-14), were isolated and characterized from fungus Aspergillus calidoustus, which was separated from the wetland soil collected at Dianchi Lake, Yunnan Province. Compound 5 featured an unusual dioxolane moiety, and compound 15 was a rare austin meroterpenoid analogue with the opened A ring, and also featured an undescribed oxygen bridge between C-3 and C-16 to construct an unexpected tetrahydrofuran ring. Their structures were established by widespread spectroscopic methods, single-crystal X-ray diffraction experiments, and ECD calculation. All the isolated drimane sesquiterpenoids were evaluated for the in vitro cytotoxicity against five tumor cell lines, including SW480 ( colon cancer), IOMM-Lee ( meningioma), HeLa ( cervical cancer), FARAGE ( diffuse large B-cell lymphoma), and SU-DHL-4 ( diffuse large B-cell lymphoma). Compound 9 exhibited significant cytotoxicity against FARAGE and SU-DHL-4 tumor cell lines with IC50 values of 5.54 and 9.78 μM, respectively. Further mechanism study showed that 9 could significantly promote apoptosis in FARAGE and SU-DHL-4 cell lines by interfering with mitochondrial function.
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Authors | Fengli Li, Shuyuan Mo, Jie Yin, Sitian Zhang, Saisai Gu, Zi Ye, Jianping Wang, Zhengxi Hu, Yonghui Zhang |
Journal | Bioorganic chemistry
(Bioorg Chem)
Vol. 127
Pg. 105988
(10 2022)
ISSN: 1090-2120 [Electronic] United States |
PMID | 35797862
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2022 Elsevier Inc. All rights reserved. |
Chemical References |
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Topics |
- Aspergillus
- China
- Fungi
- Humans
- Lymphoma, Large B-Cell, Diffuse
- Molecular Structure
- Sesquiterpenes
(chemistry)
- Soil
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