Antiapoptotic and proapoptotic action of various amino acids and analogs in starving MOLT-4 cells. |
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Authors: | Frantisek Franek Ivana Fismolová Tomás Eckschlager |
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Affiliation: | Laboratory of Growth Regulators, Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Radiova 1, Prague 10, CZ-10227, Czech Republic. franek@biomed.cas.cz |
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Abstract: | This study is based on our previous findings showing that certain amino acids may protect hybridoma cells against starvation-induced apoptosis. In the present work we have screened 44 amino acids and analogs for their capacity of modulating apoptosis in human T-lymphoblastic leukemia cell line MOLT-4 exposed to starvation in a nutrient-poor medium. The panel of tested substances was found to contain not only compounds with antiapoptotic activity (e.g., l-glutamine, l-histidine, glycine, l-proline, and l-2-aminopentanoic acid), but also compounds with proapoptotic activity (e.g., l-phenylalanine, l-tryptophan, l-arginine, and l-2-aminohexanoic acid). The apoptosis-modulating effects were dependent on fine details of the structure of the compounds. A switch from antiapoptotic activity to proapoptotic activity was found between 6-aminohexanoic acid and 7-aminoheptanoic acid, as well as between l-2-aminopentanoic acid and l-2-aminohexanoic acid. D-amino acids tested were without effect. |
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Keywords: | amino acids MOLT-4 apoptosis |
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