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Pantaleo A, Ferru E, Vono R, Giribaldi G, Lobina O, Nepveu F, Ibrahim H, Nallet JP, Carta F, Mannu F, Pippia P, Campanella E, Low PS, Turrini F. New antimalarial indolone-N-oxides, generating radical species, destabilize the host cell membrane at early stages of Plasmodium falciparum growth: role of band 3 tyrosine phosphorylation. Free Radic Biol Med 2012; 52:527-36. [PMID: 22142474 PMCID: PMC3385926 DOI: 10.1016/j.freeradbiomed.2011.11.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Revised: 11/07/2011] [Accepted: 11/09/2011] [Indexed: 11/20/2022]
Abstract
Although indolone-N-oxide (INODs) genereting long-lived radicals possess antiplasmodial activity in the low-nanomolar range, little is known about their mechanism of action. To explore the molecular basis of INOD activity, we screened for changes in INOD-treated malaria-infected erythrocytes (Pf-RBCs) using a proteomics approach. At early parasite maturation stages, treatment with INODs at their IC(50) concentrations induced a marked tyrosine phosphorylation of the erythrocyte membrane protein band 3, whereas no effect was observed in control RBCs. After INOD treatment of Pf-RBCs we also observed: (i) accelerated formation of membrane aggregates containing hyperphosphorylated band 3, Syk kinase, and denatured hemoglobin; (ii) dose-dependent release of microvesicles containing the membrane aggregates; (iii) reduction in band 3 phosphorylation, Pf-RBC vesiculation, and antimalarial effect of INODs upon addition of Syk kinase inhibitors; and (iv) correlation between the IC(50) and the INOD concentrations required to induce band 3 phosphorylation and vesiculation. Together with previous data demonstrating that tyrosine phosphorylation of oxidized band 3 promotes its dissociation from the cytoskeleton, these results suggest that INODs cause a profound destabilization of the Pf-RBC membrane through a mechanism apparently triggered by the activation of a redox signaling pathway rather than direct oxidative damage.
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Affiliation(s)
- Antonella Pantaleo
- Department of Physiological, Biochemical, and Cell Sciences, University of Sassari, Sassari 07100, Italy.
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Ibrahim H, Pantaleo A, Turrini F, Arese P, Nallet JP, Nepveu F. Pharmacological properties of indolone-N-oxides controlled by a bioreductive transformation in red blood cells? Med Chem Commun 2011. [DOI: 10.1039/c1md00127b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ibrahim N, Ibrahim H, Kim S, Nallet JP, Nepveu F. Interactions between Antimalarial Indolone-N-oxide Derivatives and Human Serum Albumin. Biomacromolecules 2010; 11:3341-51. [DOI: 10.1021/bm100814n] [Citation(s) in RCA: 231] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Nehal Ibrahim
- Université de Toulouse 3, UPS, UMR 152 (Laboratoire de pharmacochimie des substances naturelles et pharmacophores redox), F-31062 Toulouse cedex 9, France, IRD, UMR 152, F-31062 Toulouse cedex 9, France, and IDEALP-PHARMA, Bâtiment CEI, 66 Bd Niels Bohr, BP 2132, 69603 Villeurbanne cedex, France
| | - Hany Ibrahim
- Université de Toulouse 3, UPS, UMR 152 (Laboratoire de pharmacochimie des substances naturelles et pharmacophores redox), F-31062 Toulouse cedex 9, France, IRD, UMR 152, F-31062 Toulouse cedex 9, France, and IDEALP-PHARMA, Bâtiment CEI, 66 Bd Niels Bohr, BP 2132, 69603 Villeurbanne cedex, France
| | - Sothea Kim
- Université de Toulouse 3, UPS, UMR 152 (Laboratoire de pharmacochimie des substances naturelles et pharmacophores redox), F-31062 Toulouse cedex 9, France, IRD, UMR 152, F-31062 Toulouse cedex 9, France, and IDEALP-PHARMA, Bâtiment CEI, 66 Bd Niels Bohr, BP 2132, 69603 Villeurbanne cedex, France
| | - Jean-Pierre Nallet
- Université de Toulouse 3, UPS, UMR 152 (Laboratoire de pharmacochimie des substances naturelles et pharmacophores redox), F-31062 Toulouse cedex 9, France, IRD, UMR 152, F-31062 Toulouse cedex 9, France, and IDEALP-PHARMA, Bâtiment CEI, 66 Bd Niels Bohr, BP 2132, 69603 Villeurbanne cedex, France
| | - Françoise Nepveu
- Université de Toulouse 3, UPS, UMR 152 (Laboratoire de pharmacochimie des substances naturelles et pharmacophores redox), F-31062 Toulouse cedex 9, France, IRD, UMR 152, F-31062 Toulouse cedex 9, France, and IDEALP-PHARMA, Bâtiment CEI, 66 Bd Niels Bohr, BP 2132, 69603 Villeurbanne cedex, France
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Nepveu F, Kim S, Boyer J, Chatriant O, Ibrahim H, Reybier K, Monje MC, Chevalley S, Perio P, Lajoie BH, Bouajila J, Deharo E, Sauvain M, Tahar R, Basco L, Pantaleo A, Turini F, Arese P, Valentin A, Thompson E, Vivas L, Petit S, Nallet JP. Synthesis and antiplasmodial activity of new indolone N-oxide derivatives. J Med Chem 2010; 53:699-714. [PMID: 20014857 DOI: 10.1021/jm901300d] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of 66 new indolone-N-oxide derivatives was synthesized with three different methods. Compounds were evaluated for in vitro activity against CQ-sensitive (3D7), CQ-resistant (FcB1), and CQ and pyrimethamine cross-resistant (K1) strains of Plasmodium falciparum (P.f.), as well as for cytotoxic concentration (CC(50)) on MCF7 and KB human tumor cell lines. Compound 26 (5-methoxy-indolone-N-oxide analogue) had the most potent antiplasmodial activity in vitro (<3 nM on FcB1 and = 1.7 nM on 3D7) with a very satisfactory selectivity index (CC(50) MCF7/IC(50) FcB1: 14623; CC(50) KB/IC(50) 3D7: 198823). In in vivo experiments, compound 1 (dioxymethylene derivatives of the indolone-N-oxide) showed the best antiplasmodial activity against Plasmodium berghei, 62% inhibition of the parasitaemia at 30 mg/kg/day.
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Affiliation(s)
- Françoise Nepveu
- Université de Toulouse, UPS, UMR 152 (Laboratoire de Pharmacochimie des Substances Naturelles et Pharmacophores Redox), F-31062 Toulouse cedex 9, France.
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Petit S, Nallet JP, Guillard M, Dreux J, Chermat R, Poncelet M, Bulach C, Simon P, Fontaine C, Barthelmebs M, Imbs JL. Synthèses et activités psychotropes de 3,4-diarylpipéridines. Corrélation structure-activité et recherche d'une activité antihypertensive. Eur J Med Chem 1991. [DOI: 10.1016/0223-5234(91)90209-6] [Citation(s) in RCA: 88] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Petit S, Nallet JP, Guillard M, Dreux J, Chermat R, Poncelet M, Bulach C, Simon P. Synthèses et activités psychotropes de 3,4-diarylpiperidin-2-ones: corrélation structure-activité. Eur J Med Chem 1990. [DOI: 10.1016/0223-5234(90)90129-q] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nallet JP, Ramaciotti D, Bugmann G, Pittard J. [Demonstration of a control lever for a simulator of visual aptitudes]. Soz Praventivmed 1978; 23:293-4. [PMID: 706838 DOI: 10.1007/bf02075160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In this paper, the design and testing of the control of a new visual screener are described. The equipment is composed of a push-pull lever, an electronic digitalizer and a display on which Landolt rings are presented. The problem to be solved was to check whether the eight directions in which the lever could be oriented were equally reliable. For this purpose, 24 untrained subjects were required to respond to 108 by-chance oriented optotypes. This experiment demonstrated that the device was reliable in this respect that it produced very few errors; however, fiability was unequally distributed over the eight orientations. Suggestions for improvement were made.
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