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Pinheiro M, Silva AS, Reis S. Molecular interactions of rifabutin with membrane under acidic conditions. Int J Pharm 2015; 479:63-9. [PMID: 25542991 DOI: 10.1016/j.ijpharm.2014.12.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/16/2014] [Accepted: 12/19/2014] [Indexed: 01/19/2023]
Abstract
This work focuses on the interaction of the anti-tuberculosis (anti-TB) drug, rifabutin (RFB) with cell membrane models formed by 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC). The experiments were performed under acidic conditions (i.e., pH 5.0) taking into account the pH conditions that RFB may find in the course of its in vivo pharmacological activity. The partition of the drug to the membrane was quantified through the partition coefficient (Kp). Fluorescence quenching studies were performed to predict the drug's location across the cell membrane model. The effect of RFB on the biophysical parameters of the cell membrane model was studied by steady-state anisotropy and small-angle X-ray scattering (SAXS). The overall results point to a marked interaction of RFB with cell membranes under acidic pH, which may be related with its pharmacological effects. The in vivo success of RFB may be associated with the drug's disordering effect of the membranes under acidic pH values environments, and consequently drug accumulation in the gastric infected tissues and inside phagolysosomes. On the other hand, the present study allowed establishing important correlations with the gastrointestinal side effects caused by RFB.
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Affiliation(s)
- Marina Pinheiro
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira n.° 228, Porto 4050-313, Portugal.
| | - Ana Sofia Silva
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira n.° 228, Porto 4050-313, Portugal
| | - Salette Reis
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira n.° 228, Porto 4050-313, Portugal
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Ilboudo S, Fouche E, Rizzati V, Toé AM, Gamet-Payrastre L, Guissou PI. In vitro impact of five pesticides alone or in combination on human intestinal cell line Caco-2. Toxicol Rep 2014; 1:474-489. [PMID: 28962261 PMCID: PMC5598529 DOI: 10.1016/j.toxrep.2014.07.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 07/01/2014] [Accepted: 07/14/2014] [Indexed: 01/24/2023] Open
Abstract
In Burkina Faso, as in most Sahelian countries, the failure to follow good agricultural practices coupled with poor soil and climate conditions in the locust control context lead to high environmental contaminations with pesticide residues. Thus, consumers being orally exposed to a combination of multiple pesticide residues through food and water intake, the digestive tract is a tissue susceptible to be directly exposed to these food contaminants. The aim of our work was to compare in vitro the impact of five desert locust control pesticides (Deltamethrin DTM, Fenitrothion FNT, Fipronil FPN, Lambda-cyalothrine LCT, and Teflubenzuron TBZ) alone and in combination on the human intestinal Caco-2 cells viability and function. Cells were exposed to 0.1–100 μM pesticides for 10 days alone or in mixture (MIX). Our results showed a cytotoxic effect of DTM, FNT, FPN, LCT, and TBZ alone or in combination in human intestinal Caco-2 cells. The most efficient were shown to be FPN and FNT impacting the cell layer integrity and/or barrier function, ALP activity, antioxidant enzyme activity, lipid peroxidation, Akt activation, and apoptosis. The presence of antioxidant reduced lipid peroxidation level and attenuated the pesticides-induced cell toxicity, suggesting that key mechanism of pesticides cytotoxicity may be linked to their pro-oxidative potential. A comparative analysis with the predicted cytotoxic effect of pesticides mixture using mathematical modeling shown that the combination of these pesticides led to synergistic effects rather than to a simple independent or dose addition effect.
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Affiliation(s)
- Sylvain Ilboudo
- INRA UMR 1331Toxalim (Research centre in food Toxicology), 180 Chemin de Tournefeuille, F-31027 Toulouse, France.,Institut de Recherche en Science de la Santé (IRSS/CNRST), 03, BP 7192, Ouagadougou, Burkina Faso.,Laboratoire de Toxicologie, Environnement et Santé; Ecole Doctorale de la Santé, Université de Ouagadougou, 03, BP 7021, Ouagadougou, Burkina Faso
| | - Edwin Fouche
- INRA UMR 1331Toxalim (Research centre in food Toxicology), 180 Chemin de Tournefeuille, F-31027 Toulouse, France
| | - Virginie Rizzati
- INRA UMR 1331Toxalim (Research centre in food Toxicology), 180 Chemin de Tournefeuille, F-31027 Toulouse, France
| | - Adama M Toé
- Institut de Recherche en Science de la Santé (IRSS/CNRST), 03, BP 7192, Ouagadougou, Burkina Faso
| | - Laurence Gamet-Payrastre
- INRA UMR 1331Toxalim (Research centre in food Toxicology), 180 Chemin de Tournefeuille, F-31027 Toulouse, France
| | - Pierre I Guissou
- Institut de Recherche en Science de la Santé (IRSS/CNRST), 03, BP 7192, Ouagadougou, Burkina Faso.,Laboratoire de Toxicologie, Environnement et Santé; Ecole Doctorale de la Santé, Université de Ouagadougou, 03, BP 7021, Ouagadougou, Burkina Faso
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Effects of surfactin on membrane models displaying lipid phase separation. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2013; 1828:801-15. [DOI: 10.1016/j.bbamem.2012.11.007] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Revised: 10/19/2012] [Accepted: 11/05/2012] [Indexed: 01/02/2023]
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Domenech O, Dufrêne YF, Van Bambeke F, Tukens PM, Mingeot-Leclercq MP. Interactions of oritavancin, a new semi-synthetic lipoglycopeptide, with lipids extracted from Staphylococcus aureus. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:1876-85. [PMID: 20599683 DOI: 10.1016/j.bbamem.2010.06.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2010] [Revised: 05/25/2010] [Accepted: 06/11/2010] [Indexed: 12/01/2022]
Abstract
Oritavancin, a lipoglycopeptide with marked bactericidal activity against vancomycin-resistant Staphylococcus aureus and enterococci, induces calcein release from CL:POPE and POPG:POPE liposomes, an effect enhanced by an increase in POPG:POPE ratio, and decreased when replacing POPG by DPPG (Domenech et al., Biochim Biophys Acta 2009; 1788:1832-40). Using vesicles prepared from lipids extracted from S. aureus, we showed that oritavancin induces holes, erosion of the edges, and decrease of the thickness of the supported lipid bilayers (atomic force microscopy; AFM). Oritavancin also induced an increase of membrane permeability (calcein release) on a time- and dose-dependent manner. These effects were probably related to the ability of the drug to bind to lipid bilayers as shown by 8-anilino-1- naphthalene sulfonic acid (ANS) assay. Interaction of oritavancin with phospholipids at the level of their glycerol backbone and hydrophobic domain was studied by monitoring changes of Laurdan excitation generalized polarization (GP(ex)) and 1,6-diphenyl-1,3,5-hexatriene (DPH) fluorescence anisotropy upon temperature increase. Oritavancin increased GP(ex) values and the transition temperature, indicating a more ordered structure at the level of the glycerol backbone. Oritavancin slightly decreased DPH fluorescence depolarization intensities, suggesting an increase in fluidity at the level of acyl chains. Together, our data confirm the interaction of oritavancin with lipids and the potential role of a rigidifying effect at the level of glycerol backbone for membrane permeabilization. This work shows how AFM and biophysical methods may help in characterizing drug-membrane interactions, and sheds further light on the mode of action of oritavancin.
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Affiliation(s)
- Oscar Domenech
- Université catholique de Louvain, Louvain Drug Research Institute, Unité de pharmacologie cellulaire et moléculaire, UCL 73.70, avenue E. Mounier 73, B-1200 Bruxelles, Belgium
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Cunningham M, Garcia F, Pollero RJ. Arachnid lipoproteins: comparative aspects. Comp Biochem Physiol C Toxicol Pharmacol 2007; 146:79-87. [PMID: 16887396 DOI: 10.1016/j.cbpc.2006.06.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2006] [Revised: 06/23/2006] [Accepted: 06/24/2006] [Indexed: 12/01/2022]
Abstract
Findings on hemolymph lipoproteins in the class Arachnida are reviewed in relation to their lipid and protein compositions, hydrated densities, the capacity of apoproteins to bind lipids, and the influence of xenobiotics on their structures and functionality. The occurrence of hemolymphatic lipoproteins in arachnids has been reported in species belonging to the orders Araneida, Scorpionida, Solpugida and Acarina. However, lipoproteins were properly characterized in only three species, Eurypelma californicum, Polybetes pythagoricus and Latrodectus mirabilis. Like insect and crustaceans the arachnids examined contain high density lipoproteins (HDLs) as predominant circulating lipoproteins. Although in most arachnids these particles resemble those of insect HDLs called "lipophorins", in two arachnid species they differ from lipophorins in their apoproteins, total mass and lipid composition. The hemolymph of P. pythagoricus and L. mirabilis contains another HDL of higher density, while P. pythagoricus and E. californicum hemolymph contain a third lipoprotein of very high density (VHDL). Composition of arachnid lipoproteins regarding apoprotein classes as well as lipid classes differ among species. Hemocyanin, in addition to the classical role of this protein as respiratory pigment, is presented here performing the function of apolipoprotein in some arachnid species. Reports on experiments demonstrating the capacity of hemocyanin to bind neutral and polar lipid classes, including ecdysteroids, are commented. Recent works about the changes evoked by a phosphorous pesticide on the structures and functionality of spider lipoproteins are also reviewed.
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Affiliation(s)
- Mónica Cunningham
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Universidad Nacional de La Plata (UNLP), (1900) La Plata, Argentina.
| | - Fernando Garcia
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Universidad Nacional de La Plata (UNLP), (1900) La Plata, Argentina
| | - Ricardo J Pollero
- Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Universidad Nacional de La Plata (UNLP), (1900) La Plata, Argentina
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García F, Gonzalez-Baró MR, Garda H, Cunningham M, Pollero R. Fenitrothion-induced structural and functional perturbations in the yolk lipoproteins of the shrimp Macrobrachium borellii. Lipids 2004; 39:389-96. [PMID: 15357027 DOI: 10.1007/s11745-004-1243-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Two lipovitellin (LV) forms containing the same apoproteins but differing in their lipid composition were isolated from Macrobrachium borelii eggs at early (LVe) and late (LVI) embryogenic stages and characterized. These two forms of LV, as well as liposomes prepared with lipids extracted from them, were used as simpler models to study the effect of the pesticide fenitrothion (FS) on their structures and functions. Rotational diffusion and fluorescence lifetime of two fluorescent probes [1,6-diphenyl-1,3,5-hexatriene (DPH) and 3-(p-(6-phenyl)-1,3,5-hexatrienal)phenylpropionic acid (DPH-PA)] were used to obtain information on structural changes induced by FS in the inner and outer regions of the LV, respectively. Comparison of the rotational behavior of these probes in native LV and liposomes (LP) from extracted LV lipids suggests that apoprotein-lipid interactions result in an ordered neutral lipid core. FS increased the lipid phase polarity of both LV and LP forms. The rotation of these probes in LP was not affected, suggesting a dependence of FS action on lipid-protein interactions. DPH-PA steady-state anisotropy showed that, unlike the LVe form, the LVI form was sensitive to extremely low FS concentrations. The ability of both LV to transfer palmitic acid to albumin was increased, but in a dissimilar manner, by the presence of FS. Such differences in the sensitivity of the LV at different steps of embryogenesis to FS influence the toxic action of this insecticide.
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Affiliation(s)
- Fernando García
- Instituto de Investigaciones Bioquímicas de La Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata, (1900) La Plata, Argentina
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The lipid bilayer concept: Experimental realization and current applications. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0927-5193(03)80025-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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López CS, Garda HA, Rivas EA. The effect of osmotic stress on the biophysical behavior of the Bacillus subtilis membrane studied by dynamic and steady-state fluorescence anisotropy. Arch Biochem Biophys 2002; 408:220-8. [PMID: 12464275 DOI: 10.1016/s0003-9861(02)00566-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The thermotropic behavior of intact bacterial membranes and vesicles prepared from total and polar lipids isolated from Bacillus subtilis cultures grown at 37 degrees C in normal (LB) and hyperosmotic (LBN) conditions was studied using 1,6-diphenyl-1,3,5-hexatriene (DPH), 1-(4-trimethylammoniumphenyl)-6-phenyl-1,3,5-hexatriene p-toluenesulfonate (TMA-DPH), and 2-diethylamino-6-lauroyl-naphthalene (Laurdan) as fluorescent probes. No phase transition of bulk lipids was observed in these preparations at the range of temperature studied. The anisotropy values (r(s)) for DPH and TMA-DPH in purified membranes showed significant differences between the LB and LBN conditions, suggesting that there was an increase in membrane packing during the adaptation to osmotic stress. Furthermore, generalized polarization (GP) parameters for Laurdan indicated small but significant changes in water relaxation at the membrane hydrophobic/hydrophilic interface. Membrane preparations showed r(s) higher values than those of lipid vesicles and a higher temperature dependence of the Laurdan GP parameter. This fact indicates that membrane proteins increase the lipid packing and keep the membrane more sensitive to temperature changes.
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Affiliation(s)
- Claudia S López
- Instituto de Biología Celular y Neurociencias Dr. E. De Robertis, Facultad de Medicina Universidad de Buenos Aires (UBA), Paraguay 2155 (1121), Buenos Aires, Argentina
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Garcia CF, Cunningham M, González-Baró MR, Garda H, Pollero R. Effect of fenitrothion on the physical properties of crustacean lipoproteins. Lipids 2002; 37:673-9. [PMID: 12216838 DOI: 10.1007/s11745-002-0948-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The effect of the liposoluble organophosphorus insecticide fenitrothion (FS) on lipid packing and rotation of two crustacean plasma HDL was investigated. These lipoproteins, HDL-1 and HDL-2, differed in their lipid composition, but their lipid/protein ratios were similar. The rotational behavior of the fluorescent probes 1,6-diphenyl-1,3,5-hexatriene (DPH) and 3-(p-(6-phenyl)-1,3,5-hexatrienyl) phenylpropionic acid (DPH-PA) was used to obtain information about the lipid dynamics in the outer and inner regions, respectively, of the lipid phase of the lipoproteins. Fluorescent steady-state anisotropy (r(s)), lifetime (tau), rotational correlation time (tau(r)), and the limiting anisotropy (r(infinity)) of these probes were measured in the lipoproteins exposed to different concentrations of FS in vitro. The results showed the penetration of FS into both plasma lipoproteins, altering the lipid dynamics of the inner as well as the outer regions. The overall effect of the insecticide was to induce an increase in the lipid order in a concentration-dependent fashion. DPH and DPH-PA fluorescence-lifetime shortening indicated that FS increased the polarity of the probe environment, suggesting an enhanced water penetration into the lipoprotein lipid phase, may be due to the induction of failures in the lipid packing. Even in the absence of FS, a higher ordering of the lipid phase was found in HDL-2 compared to HDL-1, a fact that might be attributed to a higher percentage of sphingomyelin in HDL-2.
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Affiliation(s)
- C F Garcia
- Instituto de Investigaciones Bioquímicas de La Plata, Consèjo Nacional de Investigaciones Científicas y Técnicas-Universidad Nacional de La Plata, Argentina
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García F, González-Baró M, Pollero R. Transfer of lipids between hemolymph and hepatopancreas in the shrimp Macrobrachium borellii. Lipids 2002; 37:581-5. [PMID: 12120957 DOI: 10.1007/s11745-002-0936-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Crustacean lipids are transported in the hemolymph by an HDL. The hepatopancreas is the most important and active organ regarding lipid metabolism, so we studied the interchange of FA and acylglycerols between both components of the hepatopancreas-hemolymph system in the decapod crustacean Macrobrachium borellii. The hepatopancreas and a sole plasma lipoprotein were labeled by in vivo incubations with 14C palmitic acid injected into the hemolymph. Then they were incubated in vitro with unlabeled hepatopancreas and hemolymph, and the transfer of lipids between them was measured by radiochromatographic techniques. It was determined in vivo that more than 80% of the circulating palmitic acid was taken up by the hepatopancreas and incorporated into PC and TAG. Both classes of lipids, but mainly PC, were transferred back from tissues to the hemolymph. Lipid transfer was also demonstrated in vitro. The transfer of PC (30% of labeling) as well as that of FFA (48% of labeling) from hemolymph to hepatopancreas was determined. On the other hand, FFA were released more efficiently than the acylglycerols from intact hepatopancreas to hemolymph, and they were the only lipid transferred when the hepatopancreas had been previously washed.
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Affiliation(s)
- Fernando García
- Instituto de Investigaciones Bioquímicas de La Plata, Consejo Nacional de Investigaciones Científicas y Técnicas-Universidad Nacional de La Plata, Argentina
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