1
|
Omar AM, Dibwe DF, Tawila AM, Sun S, Phrutivorapongkul A, Awale S. Chemical Constituents of Anneslea fragrans and Their Antiausterity Activity against the PANC-1 Human Pancreatic Cancer Cell Line. JOURNAL OF NATURAL PRODUCTS 2019; 82:3133-3139. [PMID: 31682126 DOI: 10.1021/acs.jnatprod.9b00735] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
An ethanolic extract of Anneslea fragrans leaves showed potent preferential cytotoxicity against PANC-1 human pancreatic cancer cells under a nutrient-deprived condition, with a PC50 value of 9.6 μg/mL. Phytochemical investigation of this active extract led to the isolation of two new secondary metabolites, fragranones A (1) and B (2), along with 15 previously reported compounds. The structure elucidation of the new compounds was achieved by HRFABMS, acid hydrolysis, NMR, and ECD spectroscopic analysis. Fragranone A (1) is the first example of a rare natural product bearing an acetonide glucose moiety. Fragranone B (2) is representative of a rare class of natural products with a threonolactone unit linked to a chalcone through an ether linkage. The isolated compounds exhibited antiausterity activity against PANC-1 cells under nutrient-deprived conditions, and betulin (14) was found to be the most potent compound tested, with a PC50 value of 8.4 μM. In addition, fragranone A (1) was found to suppress PANC-1 cancer cell migration in real time.
Collapse
Affiliation(s)
- Ashraf M Omar
- Division of Natural Drug Discovery, Institute of Natural Medicine , University of Toyama , 2630 Sugitani , Toyama 930-0194 , Japan
| | - Dya Fita Dibwe
- Division of Natural Drug Discovery, Institute of Natural Medicine , University of Toyama , 2630 Sugitani , Toyama 930-0194 , Japan
| | - Ahmed M Tawila
- Division of Natural Drug Discovery, Institute of Natural Medicine , University of Toyama , 2630 Sugitani , Toyama 930-0194 , Japan
| | - Sijia Sun
- Division of Natural Drug Discovery, Institute of Natural Medicine , University of Toyama , 2630 Sugitani , Toyama 930-0194 , Japan
| | | | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine , University of Toyama , 2630 Sugitani , Toyama 930-0194 , Japan
| |
Collapse
|
2
|
Anti-inflammatory constituents from Perilla frutescens on lipopolysaccharide-stimulated RAW264.7 cells. Fitoterapia 2018; 130:61-65. [PMID: 30121232 DOI: 10.1016/j.fitote.2018.08.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 08/13/2018] [Accepted: 08/14/2018] [Indexed: 01/09/2023]
Abstract
Perilla frutescens (L.) Britt. (Lamiaceae) is a traditionally medicinal herb in East Asian countries to treat various diseases. In present study, the low-polarity constituents of the aerial parts of P. frutescens were investigated and their anti-inflammatory effect on lipopolysaccharide (LPS)-stimulated RAW264.7 cells were assayed. Three new furanoid monoterpenoids, named as frutescenones A - C (1-3), together with thirteen known compounds (4-16) were isolated and identified on the basis of extensive spectroscopic analysis and a single-crystal X-ray diffraction study. Among these components, 1 is an unusual monoterpenoid with 2,3'-bifuran skeleton, and 3 is a rare perillaketone-adenine hybrid heterodimer, while the revised NMR arrangements of 4 were reported at the first time. Furthermore, monoterpenoid 4 and alkaloid 15 showed remarkably inhibitory effect on the production of inflammatory mediator (NO) and pro-inflammatory cytokines (TNF-α and/or IL-6) in LPS-stimulated RAW264.7 cells.
Collapse
|
4
|
Padumadasa C, Xu YM, Wijeratne EMK, Espinosa-Artiles P, U'Ren JM, Arnold AE, Gunatilaka AAL. Cytotoxic and Noncytotoxic Metabolites from Teratosphaeria sp. FL2137, a Fungus Associated with Pinus clausa. JOURNAL OF NATURAL PRODUCTS 2018; 81:616-624. [PMID: 29373790 DOI: 10.1021/acs.jnatprod.7b00838] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new naphthoquinone, teratosphaerone A (1), four new naphthalenones, namely, teratosphaerone B (2), structurally related to 1, iso-balticol B (3), iso-balticol B-4,9-acetonide (4), and (+)-balticol C (5), a new furanonaphthalenone, (3a S,9 R,9a S)-1(9a),3(3a),9-hexahydromonosporascone (6), and the known metabolite monosporascone (7) were isolated from Teratosphaeria sp. FL2137, a fungal strain inhabiting the internal tissue of recently dead but undecomposed foliage of Pinus clausa. The structures of 1-6 were elucidated on the basis of their spectroscopic data including 2D NMR, and absolute configurations of 2, 3, and 6 were determined by the modified Mosher's ester method. When evaluated in a panel of five tumor cell lines, metabolites 1 and 7 isolated from a cytotoxic fraction of the extract exhibited moderate selectivity for metastatic breast adenocarcinoma cell line MDA-MB-231. Of these, 1 showed cytotoxicity to this cell line with an IC50 of 1.2 ± 0.1 μM.
Collapse
Affiliation(s)
- Chayanika Padumadasa
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
- Department of Chemistry, Faculty of Applied Sciences , University of Sri Jayewardenepura , Gangodawila, Nugegoda , Sri Lanka
| | - Ya-Ming Xu
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
| | - E M Kithsiri Wijeratne
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
| | - Patricia Espinosa-Artiles
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
| | - Jana M U'Ren
- Department of Agricultural and Biosystems Engineering, College of Agriculture and Life Sciences , University of Arizona , Tucson , Arizona 85721 , United States
| | - A Elizabeth Arnold
- School of Plant Sciences, College of Agriculture and Life Sciences , University of Arizona , Tucson , Arizona 85721 , United States
| | - A A Leslie Gunatilaka
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
| |
Collapse
|
5
|
Abstract
A new 28-norlupane triterpenoid, 3-acetate-28-norlup-20(29)-en-3β-hydroxy-17β-hydroperoxide (1) and a new tirucallane triterpenoid, cornusalterin M (2), together with one known triterpenoid, 3-acetate-28-norlup-20(29)-en-3β,17β-diol (3), were isolated from a MeOH extract of the stems of Cornus walteri. The chemical structures of the new compounds (1 and 2) were elucidated based on comprehensive one- and two-dimensional (1D and 2D) NMR spectroscopic experiments and high resolution-electrospray ionization (HR-ESI)-MS. Among the isolates, compound 1 was a relatively rare triterpenoid identified as a 28-norlupane-type triterpene with a 17β-hydroperoxide group and compound 3 was previously reported but only as a synthetic product. The cytotoxic activities of the isolated compounds 1-3 were evaluated by determining their inhibitory effects on human tumor cell lines (A549 (non-small cell lung carcinoma), SK-OV-3 (ovary malignant ascites), SK-MEL-2 (skin melanoma), and HCT-15 (colon adenocarcinoma)).
Collapse
|