Four vobasinyl-ibogan type bisindole alkaloids, ervachinines A-D (1-4), along with 12 known terpenoid indole alkaloids, were isolated from the whole plant of Ervatamia chinensis. Their structures were elucidated by analysis of spectroscopic data, including 1D and 2D NMR, and the absolute configurations of 1-4 were determined by CD exciton chirality method. All of the compounds were evaluated for in vitro cytotoxicity against five human cancer cell lines: HL-60, SMMC-7721, A-549, MCF-7 and SW480. Bisindole alkaloids 1-6 exhibited inhibitory effects, with IC(50) values comparable to those of cisplatin.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.phytochem.2011.11.002 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Three-component diels-alder reaction through palladium carbene migratory insertion enabled dearomative C(sp)-H bond activation.
Nat Commun
December 2024
Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Ministry of Education of China, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan, 410081, China.
Owning to the versatile nature in participation of Diels-Alder (D-A) reactions, the development of efficient approaches to generate active ortho-quinodimethanes (o-QDMs) has gained much attention. However, a catalytic method involving coupling of two readily accessible components to construct o-QDMs is lacking. Herein, we describe a palladium carbene migratory insertion enabled dearomative C(sp)-H activation to form active o-QDM species through the cross-coupling of N-tosylhydrazones with aryl halides.
View Article and Find Full Text PDFTargeted isolation of diketopiperazines from a deep-sea derived fungus with anti-neuroinflammatory effects.
Bioorg Chem
December 2024
State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, PR China; Ningbo Institute of Marine Medicine, Peking University, Beijing 100191, PR China. Electronic address:
Prenylated indole diketopiperazines represent a diverse array of alkaloids with complex chemical scaffolds and with a wide range of biological activities. Aiming to discover bioactive metabolites with structural novelty, genomic annotation in association with the MS/MS-based molecular networking demonstrated a deep-sea derived fungus Aspergillus puulaauensis F77 containing a profile of diketopiperazines. Targeted separation of the cultured fungus led to the isolation of 19 undescribed austamide-type diketopiperazines namely versicoines A-S.
View Article and Find Full Text PDFFirst Report of Accumulation of Lyngbyatoxin-A in Edible Shellfish in Aotearoa New Zealand from Marine Benthic Cyanobacteria.
Toxins (Basel)
December 2024
Cawthron Institute, Molecular Algal Ecology, Nelson 7010, New Zealand.
This study reports the first documented accumulation of lyngbyatoxin-a (LTA), a cyanotoxin produced by marine benthic cyanobacteria, in edible shellfish in Aotearoa New Zealand. The study investigates two bloom events in 2022 and 2023 on Waiheke Island, where hundreds of tonnes of marine benthic cyanobacterial mats (mBCMs) washed ashore each summer. Genetic analysis identified the cyanobacterium responsible for the blooms as sp.
View Article and Find Full Text PDFEndophytic fungi: nature's solution for antimicrobial resistance and sustainable agriculture.
Front Microbiol
December 2024
College of Engineering, Abu Dhabi University, Abu Dhabi, United Arab Emirates.
The growing threat of antimicrobial resistance (AMR) has underlined the need for a sustained supply of novel antimicrobial agents. Endophyte microorganism that reside within plant tissues as symbionts have been the source of potential antimicrobial substances. However, many novel and potent antimicrobials are yet to be discovered from these endophytes.
View Article and Find Full Text PDFTadalafil Enhances the Therapeutic Efficacy of Mesenchymal Stem Cells-Derived Exosomes in Pulmonary Hypertension by Upregulating miR-29a-3p.
Int J Nanomedicine
December 2024
Department of Respiratory Disease, The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, 121000, People's Republic of China.
Introduction: Pulmonary hypertension (PH) is a progressive and life-threatening condition. Recent research has demonstrated that exosomes derived from mesenchymal stem cells (MSC) exhibit significant therapeutic potential in the treatment of PH. The composition of these exosomes is often substantially influenced by the characteristics of their parental cells.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!