Use of a microbial model for the determination of drug effects on cell metabolism and energetics: Study of citrulline-malate
| Autor: | Régis Calvayrac, Henri Blehaut, Joël Briand, Danielle Laval-Martin |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Euglena gracilis
ved/biology.organism_classification_rank.species Malates Pharmaceutical Science Biology Models Biological chemistry.chemical_compound Adenosine Triphosphate Citrulline Animals Urea Pharmacology (medical) Ammonium Lactic Acid Energy charge Pharmacology Nucleotides ved/biology General Medicine Metabolism Carbon Dioxide Phosphate Lactic acid chemistry Biochemistry Lactates Energy Metabolism Adenosine triphosphate Cell Division |
| Zdroj: | Biopharmaceutics & Drug Disposition. 13:1-22 |
| ISSN: | 1099-081X 0142-2782 |
| Popis: | Euglena gracilis can be used as a microbial model to study the effect of drugs on lactate metabolism and gluconeogenetic synthesis. The cell growth and metabolism have been characterized in a 33 mM lactate medium, non-supplemented or supplemented by dl-malate or by l-citrulline alone or by the compound formed by the stoichiometric combination of the two components: the citrulline-malate (Stimol). The malate of the complex accelerated the ammonium disappearance, while the citrulline facilitated the lactate consumption. A synergistic action of the complex, by comparison with the additive effects of the individual components, on most of the parameters studied was detected. A remarkable resistance to anoxia, and a quicker recovery under aeration of the cells supplemented with CM, were evident: after carbonation for 2 min the total nucleotides in the medium were increased by 44 per cent with an unchanged energy charge; and after a prolonged (20 min) anoxia followed by an aeration, the capacities of the cells to synthesize ATP in the presence of excesses of both ADP and phosphate were two-fold higher in Stimol treated cells than in control. |
| Databáze: | OpenAIRE |
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