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Cytotoxicity and effect of glycyl-D-phenylalanine-2-naphthylamide on lysosomes. 1990

M Jadot, and V Biélande, and V Beauloye, and S Wattiaux-De Coninck, and R Wattiaux
Laboratoire de Chimie Physiologique, Facultés Universitaires Notre-Dame de la Paix, Namur, Belgium.

Glycyl-D-phenylalanine-2-naphthylamide (Gly-D-Phe-2-NNap) is a cytotoxic agent as exemplified by its effect on Vero cells in culture. This effect is inhibited to some extent by nigericin. On the other hand, Gly-D-Phe-2-NNap induces an increase of free activity of N-acetylglucosaminidase when incubated with a mitochondrial fraction of rat liver at pH 7.5. The phenomenon is inhibited by chloroquine, NH4Cl and nigericin, substances that are known to increase the intralysosomal pH. The latency of enzymes located in other subcellular structures - mitochondria, peroxisomes and endoplasmic reticulum - is not affected by Gly-D-Phe-2-NNap. Moreover, that compound does not cause a release of FITC-Dextran present in endosomes. Apparently Gly-D-Phe-2-NNap is a specific lytic agent for lysosomes. It is proposed that the molecule behaves like a lysosomotropic substance that is able to attack the lysosomal membrane from the interior of the organelle. Its cytotoxic properties could be explained by its effect on lysosomes.

UI MeSH Term Description Entries
D007425 Intracellular Membranes Thin structures that encapsulate subcellular structures or ORGANELLES in EUKARYOTIC CELLS. They include a variety of membranes associated with the CELL NUCLEUS; the MITOCHONDRIA; the GOLGI APPARATUS; the ENDOPLASMIC RETICULUM; LYSOSOMES; PLASTIDS; and VACUOLES. Membranes, Intracellular,Intracellular Membrane,Membrane, Intracellular
D007700 Kinetics The rate dynamics in chemical or physical systems.
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D008247 Lysosomes A class of morphologically heterogeneous cytoplasmic particles in animal and plant tissues characterized by their content of hydrolytic enzymes and the structure-linked latency of these enzymes. The intracellular functions of lysosomes depend on their lytic potential. The single unit membrane of the lysosome acts as a barrier between the enzymes enclosed in the lysosome and the external substrate. The activity of the enzymes contained in lysosomes is limited or nil unless the vesicle in which they are enclosed is ruptured or undergoes MEMBRANE FUSION. (From Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed). Autolysosome,Autolysosomes,Lysosome
D008297 Male Males
D008930 Mitochondria, Liver Mitochondria in hepatocytes. As in all mitochondria, there are an outer membrane and an inner membrane, together creating two separate mitochondrial compartments: the internal matrix space and a much narrower intermembrane space. In the liver mitochondrion, an estimated 67% of the total mitochondrial proteins is located in the matrix. (From Alberts et al., Molecular Biology of the Cell, 2d ed, p343-4) Liver Mitochondria,Liver Mitochondrion,Mitochondrion, Liver
D009550 Nigericin A polyether antibiotic which affects ion transport and ATPase activity in mitochondria. It is produced by Streptomyces hygroscopicus. (From Merck Index, 11th ed) Epinigericin,Pandavir
D011919 Rats, Inbred Strains Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding. August Rats,Inbred Rat Strains,Inbred Strain of Rat,Inbred Strain of Rats,Inbred Strains of Rats,Rat, Inbred Strain,August Rat,Inbred Rat Strain,Inbred Strain Rat,Inbred Strain Rats,Inbred Strains Rat,Inbred Strains Rats,Rat Inbred Strain,Rat Inbred Strains,Rat Strain, Inbred,Rat Strains, Inbred,Rat, August,Rat, Inbred Strains,Rats Inbred Strain,Rats Inbred Strains,Rats, August,Rats, Inbred Strain,Strain Rat, Inbred,Strain Rats, Inbred,Strain, Inbred Rat,Strains, Inbred Rat
D002470 Cell Survival The span of viability of a cell characterized by the capacity to perform certain functions such as metabolism, growth, reproduction, some form of responsiveness, and adaptability. Cell Viability,Cell Viabilities,Survival, Cell,Viabilities, Cell,Viability, Cell
D002738 Chloroquine The prototypical antimalarial agent with a mechanism that is not well understood. It has also been used to treat rheumatoid arthritis, systemic lupus erythematosus, and in the systemic therapy of amebic liver abscesses. Aralen,Arechine,Arequin,Chingamin,Chlorochin,Chloroquine Sulfate,Chloroquine Sulphate,Khingamin,Nivaquine,Sulfate, Chloroquine,Sulphate, Chloroquine

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