Article (Scientific journals)
Molecular parameters involved in aminoglycoside nephrotoxicity.
Mingeot-Leclercq, M P; Brasseur, Robert; Schanck, A
1995In Journal of Toxicology and Environmental Health, 44 (3), p. 263 - 300
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Keywords :
Aminoglycosides; Anti-Bacterial Agents; Liposomes; Membrane Lipids; Phospholipids; Phospholipases; Animals; Anti-Bacterial Agents/metabolism; Anti-Bacterial Agents/toxicity; Binding Sites; Cell Death/drug effects; Cell Membrane/drug effects; Cell Membrane/metabolism; Cell Membrane Permeability/drug effects; Fluorescence Polarization; Hair Cells, Auditory/drug effects; Hair Cells, Auditory/pathology; Kidney Tubules, Proximal/drug effects; Kidney Tubules, Proximal/pathology; Lysosomes/drug effects; Lysosomes/enzymology; Magnetic Resonance Spectroscopy; Membrane Lipids/metabolism; Phospholipases/antagonists & inhibitors; Phospholipids/metabolism; Rats; Toxicology; Pollution
Abstract :
[en] Aminoglycoside antibiotics are hydrophilic molecules consisting of an animated cyclitol associated with amino sugar. They bind in vivo as well as in vitro to negatively charged membranes. Their use as chemotherapeutic agents is unfortunately accompanied by oto- and nephrotoxic reactions, and the purpose of this review is to examine the role of the molecular interactions between aminoglycosides and membranes in the development of nephrotoxicity. 31P Nuclear magnetic resonance (NMR) and fluorescence depolarization have been used to characterize the effect of aminoglycosides on phosphate heads and fatty acyl chains of phospholipids. 15N NMR has been used to obtain interesting information on regioselective interactions of amino groups of antibiotics with phospholipids. The binding of aminoglycosides with negatively charged membranes is associated with impairment of phospholipid catabolism, change in membrane permeability, and membrane aggregation. Biochemical analysis and 1H NMR spectroscopy have brought information on the molecular mechanism involved in the impairment of phospholipid catabolism. Nephrotoxic aminoglycosides could induce sequestration of phosphatidylinositol and therefore reduce the amount of negative charge available for optimal lysosomal phospholipase activity toward phosphatidylcholine included in liposomes that also contain cholesterol and sphingomyelin. Conformational analysis shows that aminoglycosides, which have a high potency to inhibit lysosomal phospholipase activity, adopt an orientation parallel to the lipid/water interface. This orientation of the aminoglycoside molecule at the interface is also critical to explain the marked increase of membrane permeability induced by less nephrotoxic aminoglycosides such as isepamicin and amikacin. This effect is indeed only observed with aminoglycosides oriented perpendicular to this interface, probably related to the creation of a local condition of disorder. The impairment of phospholipid catabolism, which is considered to be an early and significant step in the development of aminoglycoside toxicity, is therefore not related to the change in membrane permeability. However, the role of this latter phenomenon and of membrane aggregation for aminoglycoside nephrotoxicity could be further investigated.
Disciplines :
Pharmacy, pharmacology & toxicology
Author, co-author :
Mingeot-Leclercq, M P;  Unité de Pharmacologie Cellulaire et Moléculaire, Université Catholique de Louvain, Brussels, Belgium
Brasseur, Robert ;  Université de Liège - ULiège > Département GxABT > Chemistry for Sustainable Food and Environmental Systems (CSFES)
Schanck, A;  Laboratoire de Chimie-Physique et de Cristallographie and Research Center for Advanced Materials, Louvain-La-Neuve, Belgium
Language :
English
Title :
Molecular parameters involved in aminoglycoside nephrotoxicity.
Publication date :
March 1995
Journal title :
Journal of Toxicology and Environmental Health
ISSN :
0098-4108
Publisher :
Informa UK Limited, United States
Volume :
44
Issue :
3
Pages :
263 - 300
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
We gratefully acknowledge the help of Dr. P. M. Tulkens for helpful suggestions, critical reading, and encouragement. Drs. M.-B. Carlier and G. Laurent initiated the biochemical work, and L. Depienne and F. Van Bambeke performed some of the permeability studies. We are also indebted to ). P. Dieu, B. Van Loo, Drs. V. Cabiaux, D. Carrier, M. Deleers, P. Cailly, H. C. Jarell, C. Moussebois, and I. C. P. Smith, and to Professors V. Préat, M.-F. Ronveaux-Dupal, and M. Rosseneu for their collaborations and suggestions. We thank Belphar (Brussels), Bristol Benelux (Brussels), Bristol Laboratories (Syracuse, N.Y.), Continental Pharma (Brussels), Schering-Plough (Brussels), Kyowa Hakko Kogyo (Tokyo), Meiji Seika Kaisha (Tokyo), and Toyo Jozo (Shisuoka) for the generous gifts of the compounds. Studies in our laboratories received support from the Fonds National de la Recherche Scientifique (grant 1.5213.87), the Fonds de la Recherche Scientifique Médicale (grant 3.4553.88), the Programme visant à renforcer le Potentiel Scientifique dans les Technologies Nouvelles (PREST), the Belgian State-Prime Minister's Office of Science Policy Programming (Interuniversity Attraction Poles, grant 7bis and grants 82/87-39 and 88/93-122) and the Fonds du Développement Scientifique of the Université Catholique de Louvain. M.-P. Mingeot-Leclercq is Chercheur Qualifié and R. Brasseur is Maître de Recherches of the Belgian Fonds National de la Recherche Scientifique.
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