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Artemisinin

An efficient route into synthetically challenging bridged achiral 1,2,4,5-tetraoxanes with antimalarial activity

Author(s): 
Gemma L. Ellis, Richard Amewu, Charlotte Hall, Karen Rimmer, Steven A. Ward, Paul M. O’Neill
Reference: 
Bioorganic & Medicinal Chemistry Letters, Volume 18, Issue 5, 1 March 2008, Pages 1720-1724
Contact email: 
p.m.oneill01@liv.ac.uk

Using this methodology a range of bridged tetraoxanes which display good in vitro antimalarial activity were synthesized.

Probing the Antimalarial Mechanism of Artemisinin and OZ277 (Arterolane) with Nonperoxidic Isosteres and Nitroxyl Radicals

Author(s): 
Matthias A. Fügi, Sergio Wittlin, Yuxiang Dong, and Jonathan L. Vennerstrom
Reference: 
Antimicrobial Agents and Chemotherapy, March 2010, Pages 1042-1046, Volume 54, No. 3
Contact email: 
jvenners@unmc.edu

Using combination experiments with cultured Plasmodium falciparum cells, we investigated the interactions of the nitroxide radical spin trap, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), and four of its analogs with artemisinin and the ozonide drug development candidate OZ277.

Open Access | Efficacy of non-artemisinin- and artemisinin-based combination therapies for uncomplicated falciparum malaria in Cameroon

Author(s): 
Solange Whegang Youdom, Rachida Tahar, Vincent Foumane Ngane, Georges Soula, Henri Gwet, Jean-Christophe Thalabard, Leonardo K Basco
Reference: 
Malaria Journal 2010, 9:56 (19 February 2010)
Contact email: 
lkbasco@yahoo.fr

The relative effectiveness of various drug combinations was compared by a multi-treatment Bayesian random-effect meta-analysis.

Artemisinin and its derivatives: a novel class of anti-malarial and anti-cancer agents

Author(s): 
Devdutt Chaturvedi, Abhishek Goswami, Partha Pratim Saikia, Nabin C. Barua and Paruchuri G. Rao
Reference: 
Chem. Soc. Rev., 2010, 39, 435 - 454

It is expected that this review will provide first-hand information on artemisinin chemistry to organic/medicinal chemists, and pharmacologists working on anticancer and anti-malarial drug development.

The Genetic Map of Artemisia annua L. Identifies Loci Affecting Yield of the Antimalarial Drug Artemisinin

Author(s): 
Ian A. Graham, Katrin Besser, Dianna Bowles et al.
Reference: 
Science 15 January 2010: Vol. 327. no. 5963, pp. 328 - 331
Contact email: 
iag1@york.ac.uk

Efforts to eradicate malaria are increasing demand for an affordable, high-quality, robust supply of artemisinin. We performed deep sequencing on the transcriptome of A. annua to identify genes and markers for fast-track breeding.

Brief report: HIV Protease Inhibitors, Indinavir or Nelfinavir, Augment Antimalarial Action of Artemisinin in vitro

Author(s): 
Lokesh C. Mishra, Amit Bhattacharya, Manish Sharma, AND Virendra K. Bhasin
Reference: 
Am J Trop Med Hyg 2010;82 148-150
Contact email: 
virendrabhasin@hotmail.com

Most malaria endemic regions are co-infested with HIV infection. 

The comparative antimalarial properties of weak base and neutral synthetic ozonides

Author(s): 
Yuanqing Tang, Sergio Wittlin, Susan A. Charman, Jacques Chollet, Francis C.K. Chiu, Julia Morizzi, Lisa M. Johnson, Josefina Santo Tomas, Christian Scheurer, Chistopher Snyder, Lin Zhou, Yuxiang Dong, William N. Charman, Hugues Matile, Heinrich Urwyler, Arnulf Dorn, Jonathan L. Vennerstrom
Reference: 
Bioorganic & Medicinal Chemistry Letters, Volume 20, Issue 2, 15 January 2010, Pages 563-566
Contact email: 
jvenners@unmc.edu

Thirty-three N-acyl 1,2,4-dispiro trioxolanes (secondary ozonides) were synthesized. For these ozonides, weak base functional groups were not required for high antimalarial potency against Plasmodium falciparum in vitro, but were necessary for high antimalarial efficacy in Plasmodium berghei-infected mice.

Continued cytoadherence of Plasmodium falciparum infected red blood cells after antimalarial treatment

Author(s): 
Katie R. Hughes, Giancarlo A. Biagini, Alister G. Craig
Reference: 
Molecular and Biochemical Parasitology, Volume 169, Issue 2, February 2010, Pages 71-78
Contact email: 
k.hughes@bio.gla.ac.uk

These findings show that cytoadherence, a potential pathogenic property of P. falciparum infected red blood cells, continues long after the parasite has been killed.

Fabrication of drug nanoparticles by evaporative precipitation of nanosuspension

Author(s): 
M. Kakran, N.G. Sahoo, L. Li, Z. Judeh, Y. Wang, K. Chong, L. Loh.
Reference: 
International Journal of Pharmaceutics, Volume 383, Issues 1-2, 4 January 2010, Pages 285-292, doi:10.1016/j.ijpharm.2009.09.030
Contact email: 
mlli@ntu.edu.sg

Evaporative precipitation of nanosuspension (EPN) was used to fabricate nanoparticles of a poorly water-soluble antimalarial drug, artemisinin (ART), with the aim of enhancing its dissolution rate.

Review; Artemisinin-based combination therapies: a vital tool in efforts to eliminate malaria

Author(s): 
Richard T. Eastman1 & David A. Fidock1
Reference: 
Nature Reviews Microbiology 7, 864-874 (December 2009) doi:10.1038/nrmicro2239
Contact email: 
re2180@columbia.edu

Plasmodium falciparum resistance to chloroquine and sulphadoxine–pyrimethamine has led to the recent adoption of artemisinin-based combination therapies (ACTs) as the first line of treatment against malaria. ACTs comprise semisynthetic artemisinin derivatives paired with distinct chemical classes of longer acting drugs.

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