Results 31 to 40 of about 1,516 (198)

In vitro and in vivo antimalarial and cytotoxic activity of five plants used in Congolese traditional medicine. [PDF]

open access: yes, 2010
peer reviewedAIM OF THE STUDY: The in vitro antiplasmodial activity and cytotoxicity of methanolic and dichloromethane extracts from five Congolese plants were evaluated. The plants were selected following an ethnobotanical survey conducted in D.R. Congo
Angenot, Luc   +7 more
core   +1 more source

Circular dichroism calculation for natural products [PDF]

open access: yes, 2013
Determination of the absolute configuration (AC) is often a challenging aspect in the structure elucidation of natural products. When chiral compounds possess appropriate chromophore(s), electronic circular dichroism (ECD) may provide a powerful approach
Alfarius Eko Nugroho, Hiroshi Morita
core   +1 more source

Attempted Synthesis of Vinca Alkaloids Condensed with Three-Membered Rings

open access: yesMolecules, 2018
Our successful work for the synthesis of cyclopropanated vinblastine and its derivatives by the Simmons–Smith reaction was followed to build up further three-membered rings into the 14,15-position of the vindoline part of the dimer alkaloid ...
András Keglevich   +8 more
doaj   +1 more source

Natural AChE inhibitors from plants and their contribution to Alzheimer´s disease therapy [PDF]

open access: yes, 2013
As acetylcholinesterase (AChE) inhibitors are an important therapeutic strategy in Alzheimer's disease, efforts are being made in search of new molecules with anti-AChE activity.
Alza, Natalia Paola   +4 more
core   +2 more sources

Halophiles and Their Biomolecules: Recent Advances and Future Applications in Biomedicine [PDF]

open access: yes, 2020
The organisms thriving under extreme conditions better than any other organism living on Earth, fascinate by their hostile growing parameters, physiological features, and their production of valuable bioactive metabolites.
Amoozegar, Mohammad Ali   +2 more
core   +1 more source

A Simplified Procedure for Indole Alkaloid Extraction from Catharanthus roseus Combined with a Semi-synthetic Production Process for Vinblastine

open access: yesMolecules, 2007
Dried leaves of Catharanthus roseus were extracted with aqueous acidic 0.1 M solution of HCl. Alkaloid-embonate complexes were obtained as precipitates by treating the extract with an alkaline (NaOH) solution of embonic acid (4,4-methylene-bis-3 ...
Marja-Liisa Riekkola   +4 more
doaj   +1 more source

The β-carboline alkaloid harmine inhibits telomerase activity of MCF-7 cells by down-regulating hTERT mRNA expression accompanied by an accelerated senescent phenotype [PDF]

open access: yes, 2013
The end replication problem, which occurs in normal somatic cells inducing replicative senescence, is solved in most cancer cells by activating telomerase.
Albino   +59 more
core   +1 more source

A Facile Synthesis of Deaza-Analogues of the Bisindole Marine Alkaloid Topsentin

open access: yesMolecules, 2013
A series of substituted ethyl 1-[(tert-butoxycarbonyl)amino]-2-methyl-5- (1-methyl-1H-indol-3-yl)-4-[(1-methyl-1H-indol-3-yl)carbonyl]-1H-pyrrole-3-carboxylates were prepared in excellent yields (82-98%) by one-pot reactions between β-dicarbonyl ...
Gianfranco Favi   +5 more
doaj   +1 more source

Transcriptome analysis of Catharanthus roseus for gene discovery and expression profiling. [PDF]

open access: yesPLoS ONE, 2014
The medicinal plant, Catharanthus roseus, accumulates wide range of terpenoid indole alkaloids, which are well documented therapeutic agents. In this study, deep transcriptome sequencing of C.
Mohit Verma   +4 more
doaj   +1 more source

FGFC1 Selectively Inhibits Erlotinib-Resistant Non-Small Cell Lung Cancer via Elevation of ROS Mediated by the EGFR/PI3K/Akt/mTOR Pathway

open access: yesFrontiers in Pharmacology, 2022
Non-small cell lung cancer (NSCLC) is one of the most common malignancies in the world. Epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) have been used as a first-line treatment for patients harboring with EGFR mutations in ...
Shike Yan   +12 more
doaj   +1 more source

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