Results 51 to 60 of about 483,373 (407)

Detection and toxicity evaluation of pyrrolizidine alkaloids in medicinal plants Gynura bicolor and Gynura divaricata collected from different Chinese locations [PDF]

open access: yes, 2017
Two edible plants in Southeast Asia, Gynura bicolor and G.divaricata, are not only known to be nutritive but also useful as medicinal herbs. Previous phytochemical investigation of Gynura species showed the presence of hepatotoxic pyrrolizidine alkaloids
Chen, Jian   +7 more
core   +2 more sources

Involvement of the leaf-specific multidrug and toxic compound extrusion (MATE) transporter Nt-JAT2 in vacuolar sequestration of nicotine in Nicotiana tabacum [PDF]

open access: yes, 2014
Alkaloids play a key role in higher plant defense against pathogens and herbivores. Following its biosynthesis in root tissues, nicotine, the major alkaloid of Nicotiana species, is translocated via xylem transport toward the accumulation sites, leaf ...
Goossens, Alain   +11 more
core   +4 more sources

Oxoisoaporphines and Aporphines: Versatile Molecules with Anticancer Effects

open access: yesMolecules, 2019
Cancer is a disease that involves impaired genome stability with a high mortality index globally. Since its discovery, many have searched for effective treatment, assessing different molecules for their anticancer activity.
Esteban Rodríguez-Arce   +4 more
doaj   +1 more source

Network-analysis-guided synthesis of weisaconitine D and liljestrandinine. [PDF]

open access: yes, 2015
General strategies for the chemical synthesis of organic compounds, especially of architecturally complex natural products, are not easily identified. Here we present a method to establish a strategy for such syntheses, which uses network analysis.
Gallego, GM   +8 more
core   +2 more sources

Alkaloids with Their Protective Effects Against Aβ25-35-Induced PC-12 Cell Injury from the Tubers of Pinellia pedatisecta Schott

open access: yesMolecules
Seven new alkaloids [1, (±)-2, (±)-3, 4, and 5] and one new natural product (6), along with eight known analogues, were isolated from the tubers of Pinellia pedatisecta Schott. Their structures were determined by a comprehensive analysis of spectroscopic
Xu Chen   +10 more
doaj   +1 more source

Marine Alkaloids with Anti-Inflammatory Activity: Current Knowledge and Future Perspectives

open access: yesMarine Drugs, 2020
Alkaloids are nitrogenous compounds with various biological activities. Alkaloids with anti-inflammatory activity are commonly found in terrestrial plants, but there are few records of the identification and characterization of the activity of these ...
Cássio R M Souza   +2 more
semanticscholar   +1 more source

Fatal heart block from intentional yew tree (Taxus baccata) ingestion: a case report [PDF]

open access: yes, 2019
© The Author(s) 2019. Published by Oxford University Press on behalf of the European Society of Cardiology. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org ...
Chan, Mark   +3 more
core   +2 more sources

Cephalotaxus Alkaloids

open access: yes, 2017
Cephalotaxus alkaloids represent a family of plant secondary metabolites known for 60 years. Significant activity against leukemia in mice was demonstrated for extracts of Cephalotaxus. Cephalotaxine (CET) (1), the major alkaloid of this series was isolated from Cephalotaxus drupacea species by Paudler in 1963.
Pérard-Viret, Joelle   +4 more
openaire   +3 more sources

Pyrrolizidine alkaloids

open access: yesNat. Prod. Rep., 2014
This review focuses on the isolation and synthesis of natural products containing a 1-azabicyclo[3.3.0]octane core (July 2001 to December 2012).
Robertson, J, Stevens, K
openaire   +3 more sources

ATF4‐mediated stress response as a therapeutic vulnerability in chordoma

open access: yesMolecular Oncology, EarlyView.
We screened 5 chordoma cell lines against 100+ inhibitors of epigenetic and metabolic pathways and kinases and identified halofuginone, a tRNA synthetase inhibitor. Mechanistically halofuginone induces an integrated stress response, with eIF2alpha phosphorylation, activation of ATF4 and its target genes CHOP, ASNS, INHBE leading to cell death ...
Lucia Cottone   +11 more
wiley   +1 more source

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