In the April 2014 issue the magazine Rotary Contact from Belgium-Luxembourg duly recognized he efforts and results achieved by Rotarians from Ieper and Luxembourg in the promotion of Artemisia annua tea against malaria. Geert Flamang has launched plantations in Katanga and Pierre Lutgen has run clinical trials in several African countries which demonstrate an efficiency of >95%. These trials have allowed to show that the antimalarial potency can be increased by using the dried leaves in lieu of aqueous extracts, as powder in capsules or mixed with food.
Pierre Lutgen's blog
by Patrick Engeu Ogwang and Pierre Lutgen
Most of the assessments on the antimalarial efficacy of a molecule are made in vitro. In the case of plant material the first step is generally the extraction with an organic solvent. The extract is then lyophilized, frozen and stored for subsequent trials.
Plasmodium falciparum-infected erythrocytes contain large quantities of uric acid precipitates. These precipitates are present in the parasitophorous vacuole, in the cytoplasm, not in the food vacuole of the parasite. Uric acid precipitates are highly inflammatory molecules that are considered a danger signal for innate immunity and are the causative agent of gout. Hypoxanthine is a metabolic precursor of uric acid and is essential for Plasmodium growth. It is transformed by the xanthine oxidase into xanthine the true precursor of uric acid.
It was achieved in at least 10 countries after World War 2 : USA, Siberia, Turkey, Italy, Cuba, Spain, England, Sri Lanka; Algeria, Morocco…
DDT effective in eliminating malaria
Jasson Urbach | 23 Jan 2014 AFM
The Observer (Uganda)
The research team from the Al Quds University has already shown that some plants from Palestine have a strong inhibitory effect on beta-hematin crystallisation. Salvia officinalis (M Akkawi et al., Malaria Journal, 2012, 11-Suppl,P3) and Artemisiasieberi from Palestine ( M Akkawi et al. Brit J Pharmacol Toxicol, accepted 2013). The therapeutic effect of quinine, chloroquine, amodiaquine is precisely based on hemozoin inhibition.
The diffusion of antimalarials into infected red blood cells has been studied by several authors. For example, three times more chloroquine accumulates in CQ sensitive strains than in the CQ resistant ones (KJ Saliba et al., Biochem Pharmacol. 1998, Aug 1 ;56, 313-20) Thediffusion of artemisinin into parasitized RBCs was found to be rapid, saturable, temperature dependent, irreversible. In contrast, simple passive diffusion of artemisinin was seen in nonparasitized RBCs.(N Vyas, Antimicro Ag Chemother, Jan 2002, 105-109).
The plasmodium parasite needs cholesterol for survival and multiplication. The replicative capacity of plasmodium liver forms is remarkable, achieving the fastest growth rates known.
Artemisia ketone is the major constituent of essential oil of many artemisia plants, often up to 60 %. A lot of research work has been devoted to other constituents like artemisinin, scopoletine, limonene, eucalyptol, borneol, luteolin, eupatin, casticin, but artemisia ketone is completely absent in the scientific literature. The molecule had been discovered in Artemisia annua in 1938 ( WA Jacobs et al., Annual Review of Biochemistry 7,1-193) but then fell into oblivion.
Recent results obtained at the AlQuds University in partnership with IFBV-BELHERB from Luxembourg show that freshly prepared infusion of Artemisia annua is stronger than chloroquine in the inhibition of beta-hematin (hemozoin) formation. In the infected erythrocyte the malaria parasite generates large quantities of toxic heme which it has to render innocuous by polymerizing it into hemozoin. The mechanism of quinine and all its derivates, chloroquine, amodiaquine operates by inhibiting this hemozoin crystallization.