Issue |
Ann. Parasitol. Hum. Comp.
Volume 65, Number 4, 1990
|
|
---|---|---|
Page(s) | 162 - 166 | |
DOI | https://doi.org/10.1051/parasite/1990654162 | |
Published online | 19 August 2016 |
Mémoire
Metabolism of glutamine in erythrocytes infected with the human malaria parasite: Plasmodium falciparum
Métabolisme de la glutamine chez l’érythrocyte infesté par Plasmodium falciparum
1
UA CNRS 484, Faculté de Pharmacie, 4, avenue de l’Observatoire, 75270 Paris Cedex 06, France.
2
Present address: UA CNRS 401, Laboratoire de Chimie, Muséum National d’Histoire Naturelle, 63, rue Buffon, 75231 Paris Cedex 05, France.
Accepted: 19 November 1990
The metabolism of glutamine was studied in erythrocytes infected with Plasmodium falciparum, comparatively to normal cells, in presence or not of DON (6-diazo-5-oxo-L-norleucine) or acivicin, two glutamine antagonists which have been shown to inhibit the growth of P. falciparum in vitro.
Extracellular glutamine was partially converted into glutamate using two routes corresponding to ?-glutamyl transpeptidase (GGT) and glutaminase activities. In cells infected with mature trophozoites, the observed enhancement of the glutamine influx and of the glutamate formation was consistent with the enhancement of GGT and glutaminase activities.
Résumé
Le métabolisme de la glutamine dans les globules rouges infestés par Plasmodium falciparum est étudié, comparativement aux cellules non infestées, en présence ou non de DON (6-diazo-5-oxo-L-norleucine) ou d’acivicine, deux antagonistes de la glutamine qui ont la propriété d’inhiber la croissance de P. falciparum in vitro.
La glutamine extracellulaire est partiellement convertie en glutamate selon deux voies correspondant à des activités de type ?-glutamyl transpeptidase (GGT) et glutaminase. Dans les globules rouges infestés par les formes trophozoites, on observe une augmentation de l’entrée de la glutamine et de la formation de glutamate. Le résultat est en accord avec l’augmentation des activités glutaminase et GGT.
Key words: Acivicin / 6-diazo-5-oxo-L-norleucine / Glutamate / Glutamine / Plasmodium falciparum
Mots clés : Acivicine / 6-diazo-5-oxo-L-norleucine / Glutamate / Glutamine / Plasmodium falciparum
© Masson, Paris 1990, transferred to Société Française de Parasitologie
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