1
|
Vuong MDL, Horbenko Y, Frégnaux M, Christodoulou I, Martineau-Corcos C, Levitz P, Rollet AL, Gref R, Haouas M. Degradation and Erosion of Metal-Organic Frameworks: Comparative Study of a NanoMIL-100 Drug Delivery System. ACS APPLIED MATERIALS & INTERFACES 2024; 16:2086-2100. [PMID: 38166380 DOI: 10.1021/acsami.3c14301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
To make a drug work better, the active substance can be incorporated into a vehicle for optimal protection and control of the drug delivery time and space. For making the drug carrier, the porous metal-organic framework (MOF) can offer high drug-loading capacity and various designs for effective drug delivery performance, biocompatibility, and biodegradability. Nevertheless, its degradation process is complex and not easily predictable, and the toxicity concern related to the MOF degradation products remains a challenge for their clinical translation. Here, we describe an in-depth molecular and nanoscale degradation mechanism of aluminum- and iron-based nanoMIL-100 materials exposed to phosphate-buffered saline. Using a combination of analytical tools, including X-ray photoelectron spectroscopy, nuclear magnetic resonance spectroscopy, small-angle X-ray scattering, and electron microscopy, we demonstrate qualitatively and quantitatively the formation of a new coordination bond between metal(III) and phosphate, trimesate release, and correlation between these two processes. Moreover, the extent of material erosion, i.e., bulk or surface erosion, was examined from the transformation of nanoparticles' surface, morphology, and interaction with water. Similar analyses show the impact of drug loading and surface coating on nanoMIL-100 degradation and drug release as a function of the metal-ligand binding strength. Our results indicate how the chemistry of nanoMIL-100(Al) and nanoMIL-100(Fe) drug carriers affects their degradation behaviors in a simulated physiological medium. This difference in behavior between the two nanoMIL-100s enables us to better correlate the nanoscale and atomic-scale mechanisms of the observed phenomena, thus validating the presented multiscale approach.
Collapse
Affiliation(s)
- Mai Dang Le Vuong
- Institut Lavoisier de Versailles (ILV), Université Paris-Saclay, UVSQ, CNRS, 78000 Versailles, France
- Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Saclay, CNRS, 91405 Orsay, France
- PHysicochimie des Electrolytes, Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, CNRS, 75252 Paris, France
| | - Yuliia Horbenko
- Institut Lavoisier de Versailles (ILV), Université Paris-Saclay, UVSQ, CNRS, 78000 Versailles, France
| | - Mathieu Frégnaux
- Institut Lavoisier de Versailles (ILV), Université Paris-Saclay, UVSQ, CNRS, 78000 Versailles, France
| | - Ioanna Christodoulou
- Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Saclay, CNRS, 91405 Orsay, France
| | | | - Pierre Levitz
- PHysicochimie des Electrolytes, Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, CNRS, 75252 Paris, France
| | - Anne-Laure Rollet
- PHysicochimie des Electrolytes, Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, CNRS, 75252 Paris, France
| | - Ruxandra Gref
- Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Saclay, CNRS, 91405 Orsay, France
| | - Mohamed Haouas
- Institut Lavoisier de Versailles (ILV), Université Paris-Saclay, UVSQ, CNRS, 78000 Versailles, France
| |
Collapse
|
2
|
Massaro M, Ciani R, Cinà G, Colletti CG, Leone F, Riela S. Antimicrobial Nanomaterials Based on Halloysite Clay Mineral: Research Advances and Outlook. Antibiotics (Basel) 2022; 11:antibiotics11121761. [PMID: 36551418 PMCID: PMC9774400 DOI: 10.3390/antibiotics11121761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 12/12/2022] Open
Abstract
Bacterial infections represent one of the major causes of mortality worldwide. Therefore, over the years, several nanomaterials with antibacterial properties have been developed. In this context, clay minerals, because of their intrinsic properties, have been efficiently used as antimicrobial agents since ancient times. Halloysite nanotubes are one of the emerging nanomaterials that have found application as antimicrobial agents in several fields. In this review, we summarize some examples of the use of pristine and modified halloysite nanotubes as antimicrobial agents, scaffolds for wound healing and orthopedic implants, fillers for active food packaging, and carriers for pesticides in food pest control.
Collapse
|
3
|
Kanellis VG, Dos Remedios CG. A review of heavy metal cation binding to deoxyribonucleic acids for the creation of chemical sensors. Biophys Rev 2018; 10:1401-1414. [PMID: 30229467 DOI: 10.1007/s12551-018-0455-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 09/05/2018] [Indexed: 12/14/2022] Open
Abstract
Various human activities lead to the pollution of ground, drinking, and wastewater with toxic metals. It is well known that metal ions preferentially bind to DNA phosphate backbones or DNA nucleobases, or both. Foreman et al. (Environ Toxicol Chem 30(8):1810-1818, 2011) reported the use of a DNA-dye based assay suitable for use as a toxicity test for potable environmental water. They compared the results of this test with the responses of live-organism bioassays. The DNA-based demonstrated that the loss of SYBR Green I fluorescence dye bound to calf thymus DNA was proportional to the toxicity of the water sample. However, this report raised questions about the mechanism that formed the basis of this quasi-quantitatively test. In this review, we identify the unique and preferred DNA-binding sites of individual metals. We show how highly sensitive and selective DNA-based sensors can be designed that contain multiple binding sites for 21 heavy metal cations that bind to DNA and change its structure, consistent with the release of the DNA-bound dye.
Collapse
|
4
|
Cardiano P, De Stefano C, Foti C, Giacobello F, Giuffrè O, Sammartano S. Sequestration of HEDPA , NTA and phosphonic NTA derivatives towards Al 3+ in aqueous solution. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
5
|
Cardiano P, Foti C, Giacobello F, Giuffrè O, Sammartano S. Study of Al 3+ interaction with AMP, ADP and ATP in aqueous solution. Biophys Chem 2018; 234:42-50. [PMID: 29407770 DOI: 10.1016/j.bpc.2018.01.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 01/22/2018] [Accepted: 01/22/2018] [Indexed: 12/24/2022]
Abstract
The interaction of Al3+ and nucleotide ligands, namely adenosine-5'-monophosphate, (AMP), adenosine-5'-diphosphate, (ADP), adenosine-5'-triphosphate, (ATP), has been studied in aqueous solution at T = 298.15 K and I = 0.15 mol L-1 in NaCl (only for Al3+-ATP system at I = 0.1 mol L-1). Formation constants and speciation models for the species formed are discussed on the basis of potentiometric results. The speciation models found for the three systems include ML and ML2 species in all the cases, and for Al3+-ADP and ATP systems, MLH, MLOH and ML2OH species as well. The formation constant value for ML species shows the trend, AMP < ADP < ATP. 1H NMR spectroscopy was also employed for the study of Al3+-ATP system. The 1H NMR results are in agreement with the speciation model obtained from analysis of potentiometric titration data, confirming the stabilities of the main species. Enthalpy change values were obtained by titration calorimetry; for the main Al3+-ATP species (at T = 298.15 K and I = 0.1 mol L-1 in NaCl), they resulted always higher than zero, as typical for hard-hard interactions. The dependence of formation constants on ionic strength over the range I = 0.1 to 1 mol L-1 in NaCl is also reported for Al3+-ATP system. The sequestering ability of the nucleotides under study towards Al3+ was also evaluated by the empirical parameter pL0.5.
Collapse
Affiliation(s)
- Paola Cardiano
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Claudia Foti
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Fausta Giacobello
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Ottavia Giuffrè
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy.
| | - Silvio Sammartano
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| |
Collapse
|
6
|
Affiliation(s)
- Wenhu Zhou
- Xiangya
School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
- Department
of Chemistry, Water Institute, and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Runjhun Saran
- Department
of Chemistry, Water Institute, and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Juewen Liu
- Department
of Chemistry, Water Institute, and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| |
Collapse
|
7
|
Lari M, Biver T, Busto N, Lozano HJ, Leal JM, Secco F, García B. Binding of Al(iii) to synthetic RNA and metal-mediated strand aggregation. Dalton Trans 2017; 46:16671-16681. [DOI: 10.1039/c7dt02830j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Kinetic curve of the binding of aluminum to RNA and metal-induced strand aggregation.
Collapse
Affiliation(s)
- Matteo Lari
- Departamento de Química
- Universidad de Burgos
- 09001 Burgos
- Spain
| | - Tarita Biver
- Dipartimento di Chimica e Chimica Industriale
- Università di Pisa
- 56124 Pisa
- Italy
| | - Natalia Busto
- Departamento de Química
- Universidad de Burgos
- 09001 Burgos
- Spain
| | | | - José M. Leal
- Departamento de Química
- Universidad de Burgos
- 09001 Burgos
- Spain
| | - Fernando Secco
- Dipartimento di Chimica e Chimica Industriale
- Università di Pisa
- 56124 Pisa
- Italy
| | - Begoña García
- Departamento de Química
- Universidad de Burgos
- 09001 Burgos
- Spain
| |
Collapse
|
8
|
|
9
|
Zhou P, Shi R, Yao JF, Sheng CF, Li H. Supramolecular self-assembly of nucleotide–metal coordination complexes: From simple molecules to nanomaterials. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.02.007] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
10
|
Böhm KJ, Shabanpour M, Kalchishkova N. Aluminum-Induced Kinesin Inactivation as Potential Molecular Cause of Impairment of Neuronal Transport Processes. Chem Res Toxicol 2015; 28:1275-81. [DOI: 10.1021/acs.chemrestox.5b00077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Konrad J. Böhm
- Leibniz Institute for Age Research -
Fritz Lipmann Institute (FLI), Beutenbergstraße
11, D-07745 Jena, Germany
| | - Mitra Shabanpour
- Leibniz Institute for Age Research -
Fritz Lipmann Institute (FLI), Beutenbergstraße
11, D-07745 Jena, Germany
| | - Nikolina Kalchishkova
- Leibniz Institute for Age Research -
Fritz Lipmann Institute (FLI), Beutenbergstraße
11, D-07745 Jena, Germany
| |
Collapse
|
11
|
Luque NB, Mujika JI, Rezabal E, Ugalde JM, Lopez X. Mapping the affinity of aluminum(iii) for biophosphates: interaction mode and binding affinity in 1 : 1 complexes. Phys Chem Chem Phys 2014; 16:20107-19. [DOI: 10.1039/c4cp02770a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
12
|
From coordination chemistry to biological chemistry of aluminium. J Inorg Biochem 2013; 128:156-63. [DOI: 10.1016/j.jinorgbio.2013.06.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 06/21/2013] [Accepted: 06/21/2013] [Indexed: 12/22/2022]
|
13
|
Tenório T, Silva AM, Ramos JM, Buarque CD, Felcman J. Molecular structure of tetraaqua adenosine 5'-triphosphate aluminium(III) complex: a study involving Raman spectroscopy, theoretical DFT and potentiometry. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 105:88-101. [PMID: 23295215 DOI: 10.1016/j.saa.2012.12.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2012] [Revised: 12/01/2012] [Accepted: 12/06/2012] [Indexed: 06/01/2023]
Abstract
The Alzheimer's disease is one of the most common neurodegenerative diseases that affect elderly population, due to the formation of β-amyloid protein aggregate and several symptoms, especially progressive cognitive decline. The result is a decrease in capture of glucose by cells leading to obliteration, meddling in the Krebs cycle, the principal biochemical route to the energy production leading to a decline in the levels of adenosine 5'-triphosphate. Aluminium(III) is connected to Alzheimer's and its ion provides raise fluidity of the plasma membrane, decrease cell viability and aggregation of amyloid plaques. Studies reveal that AlATP complex promotes the formation of reactive fibrils of β-amyloid protein and independent amyloidogenic peptides, suggesting the action of the complex as a chaperone in the role pathogenic process. In this research, one of complexes formed by Al(III) and adenosine 5'-triphosphate in aqueous solution is analyzed by potentiometry, Raman spectroscopy and ab initio calculations. The value of the logK(AlATP) found was 9.21±0.01 and adenosine 5'-triphosphate should act as a bidentate ligand in the complex. Raman spectroscopy and potentiometry indicate that donor atoms are the oxygen of the phosphate β and the oxygen of the phosphate γ, the terminal phosphates. Computational calculations using Density Functional Theory, with hybrid functions B3LYP and 6-311++G(d,p) basis set regarding water solvent effects, have confirmed the results. Frontier molecular orbitals, electrostatic potential contour surface, electrostatic potential mapped and Mulliken charges of the title molecule were also investigated.
Collapse
Affiliation(s)
- Thaís Tenório
- Department of Chemistry, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente, 225, Edifício Cardeal Leme, 6° andar, sala 671L, 22453-900 Rio de Janeiro, RJ, Brazil.
| | | | | | | | | |
Collapse
|
14
|
Goswami S, Paul S, Manna A. Selective “naked eye” detection of Al(iii) and PPi in aqueous media on a rhodamine–isatin hybrid moiety. RSC Adv 2013. [DOI: 10.1039/c3ra40984h] [Citation(s) in RCA: 137] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
|
15
|
Kaur K, Bhardwaj VK, Kaur N, Singh N. Fluorescent chemosensor for Al3+ and resultant complex as a chemosensor for perchlorate anion: First molecular security keypad lock based on Al3+ and ClO4− inputs. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2012.09.008] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
16
|
Zhang M, Liu YQ, Ye BC. Mononucleotide-modified metal nanoparticles: an efficient colorimetric probe for selective and sensitive detection of aluminum(III) on living cellular surfaces. Chemistry 2012; 18:2507-13. [PMID: 22298346 DOI: 10.1002/chem.201102529] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Revised: 11/09/2011] [Indexed: 02/04/2023]
Affiliation(s)
- Min Zhang
- Lab of Biosystems and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai 200237, PR China
| | | | | |
Collapse
|
17
|
Ward CL, Kleinert A, Scortecci KC, Benedito VA, Valentine AJ. Phosphorus-deficiency reduces aluminium toxicity by altering uptake and metabolism of root zone carbon dioxide. JOURNAL OF PLANT PHYSIOLOGY 2011; 168:459-465. [PMID: 20926158 DOI: 10.1016/j.jplph.2010.08.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Revised: 08/18/2010] [Accepted: 08/18/2010] [Indexed: 05/30/2023]
Abstract
The role of phosphorus (P) status in root-zone CO(2) utilisation for organic acid synthesis during Al(3+) toxicity was assessed. Root-zone CO(2) can be incorporated into organic acids via Phosphoenolpyruvate carboxylase (PEPC, EC 4.1.1.31). P-deficiency and Al(3+) toxicity can induce organic acid synthesis, but it is unknown how P status affects the utilisation of PEPC-derived organic acids during Al(3+) toxicity. Two-week-old Solanum lycopersicum seedlings were transferred to hydroponic culture for 3 weeks. The hydroponic culture consisted of a standard Long Ashton nutrient solution containing either 0.1μM or 1mM P. Short-term Al(3+) toxicity was induced by a 60-min exposure to a pH-buffered solution (pH 4.5) containing 2mM CaSO(4) and 50μM AlCl(3). Al(3+) toxicity induced a decline in root respiration, adenylate concentrations and an increase in root-zone CO(2) utilisation for both P sufficient and P-deficient plants. However during Al(3+) toxicity, P deficiency enhanced the incorporation and metabolism of root-zone CO(2) via PEPC. Moreover, P deficiency led to a greater proportion of the PEPC-derived organic acids to be exuded during Al(3+) toxicity. These results indicate that P-status can influence the response to Al(3+) by inducing a greater utilisation of PEPC-derived organic acids for Al(3+) detoxification.
Collapse
Affiliation(s)
- Caroline L Ward
- Botany and Zoology Department, Faculty of Science, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa
| | | | | | | | | |
Collapse
|
18
|
Lohani CR, Kim JM, Chung SY, Yoon J, Lee KH. Colorimetric and fluorescent sensing of pyrophosphate in 100% aqueous solution by a system comprised of rhodamine B compound and Al3+ complex. Analyst 2010; 135:2079-84. [DOI: 10.1039/c0an00059k] [Citation(s) in RCA: 220] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
19
|
Tolrà R, Barceló J, Poschenrieder C. Constitutive and aluminium-induced patterns of phenolic compounds in two maize varieties differing in aluminium tolerance. J Inorg Biochem 2009; 103:1486-90. [PMID: 19740545 DOI: 10.1016/j.jinorgbio.2009.06.013] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2009] [Revised: 05/27/2009] [Accepted: 06/25/2009] [Indexed: 11/29/2022]
Abstract
Aluminium tolerance in maize is mainly due to more efficient Al exclusion. Nonetheless, even in tolerant varieties Al can gain access into the cells. Detoxification by binding to strong organic ligands should therefore play a role also in plants with high Al exclusion capacity. To test this hypothesis in this study the concentrations of soluble, free and bound, phenolics were analyzed in roots of two maize varieties differing in Al tolerance. Exposure for 24 h to 50 microM Al in nutrient solution strongly inhibited root elongation in the sensitive variety 16 x 36, but not in the Al-tolerant variety Cateto. Cateto accumulated about half the concentration of Al in roots than 16 x 36 (analysis performed after root desorption with citrate). Roots of Al-tolerant Cateto contained higher concentrations of caffeic acid, catechol and catechin than roots of the sensitive variety. Exposure to Al induced the accumulation of taxifolin in roots of both varieties. However, Al-tolerant Cateto accumulated about twice the concentration than Al-sensitive 16 x 36 of this pentahydroxyfavonol. The molar ratio for phenolics with catecholate groups to Al was about unity in roots of Cateto, while in those of 16 x 36 the ratio was ten times lower. Both the fact that these phenolics are strong ligands for Al and their high antioxidant and antiradical activity suggest that these compounds may provide protection against the Al fraction that is able to surpass the exclusion mechanisms operating in the tolerant maize variety.
Collapse
Affiliation(s)
- Roser Tolrà
- Plant Physiology Laboratory, Bioscience Faculty, Autonomous University of Barcelona, E-08193 Bellaterra, Spain
| | | | | |
Collapse
|
20
|
|
21
|
Abstract
Before we can understand the role of Al3+ in living organisms we need to learn how it interacts with molecules found in biological systems. The only aluminium oxidation state in biology is 3+. In aqueous solutions there are only two main Al(III) species: the hexahydrate Al3+ at pH < 5.5 and the tetrahedral aluminate at pH > 6.2. In the blood plasma, citrate is the main small molecule carrier and transferrin the main protein carrier of Al3+. In fluids where the concentrations of these two ligands are low, nucleoside di- and triphosphates become Al3+ binders. Under these conditions Al3+ easily displaces Mg2+ from nucleotides. When all three classes of ligands are at low concentrations, catecholamines become likely Al3+ binders. Double-helical DNA binds Al3+ weakly and under no conditions should it compete with other ligands. Al(III) in the cell nucleus probably binds to nucleotides or phosphorylated proteins. Al3+ undergoes ligand exchange much more slowly than most metal ions: 10(5) times slower than Mg2+.
Collapse
Affiliation(s)
- R B Martin
- Chemistry Department, University of Virginia, Charlottesville 22903
| |
Collapse
|
22
|
Gonçalves PP, Silva VS. Does neurotransmission impairment accompany aluminium neurotoxicity? J Inorg Biochem 2007; 101:1291-338. [PMID: 17675244 DOI: 10.1016/j.jinorgbio.2007.06.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2007] [Revised: 05/25/2007] [Accepted: 06/05/2007] [Indexed: 02/05/2023]
Abstract
Neurobehavioral disorders, except their most overt form, tend to lie beyond the reach of clinicians. Presently, the use of molecular data in the decision-making processes is limited. However, as details of the mechanisms of neurotoxic action of aluminium become clearer, a more complete picture of possible molecular targets of aluminium can be anticipated, which promises better prediction of the neurotoxicological potential of aluminium exposure. In practical terms, a critical analysis of current data on the effects of aluminium on neurotransmission can be of great benefit due to the rapidly expanding knowledge of the neurotoxicological potential of aluminium. This review concludes that impairment of neurotransmission is a strong predictor of outcome in neurobehavioral disorders. Key questions and challenges for future research into aluminium neurotoxicity are also identified.
Collapse
Affiliation(s)
- Paula P Gonçalves
- Departamento de Biologia, Campus Universitário de Santiago, Universidade de Aveiro, 3810-193 Aveiro, Portugal.
| | | |
Collapse
|
23
|
De Stefano C, Milea D, Pettignano A, Sammartano S. Modeling ATP protonation and activity coefficients in NaClaq and KClaq by SIT and Pitzer equations. Biophys Chem 2006; 121:121-30. [PMID: 16488529 DOI: 10.1016/j.bpc.2005.12.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2005] [Revised: 12/22/2005] [Accepted: 12/26/2005] [Indexed: 10/25/2022]
Abstract
The acid-base properties of Adenosine 5'-triphosphate (ATP) in NaCl and KCl aqueous solutions at different ionic strengths (0<I/mol L(-1)<or=5 for NaCl(aq), 0<I/mol L(-1)<or=3 for KCl(aq)) and at t=25 degrees C were investigated. A selection of literature data on ATP protonation constants and on activity isopiestic coefficients was performed, together with new potentiometric measurements (by ISE-H(+), glass electrode). Both literature and new experimental data were used to model the dependence on ionic strength and ionic medium of ATP protonation by SIT (Specific ion Interaction Theory) and Pitzer equations. In addition to values of first and second ATP protonation constants in NaCl(aq) and KCl(aq) at different ionic strengths, stability constants of NaATP(3-) and KATP(3-) complexes, SIT interaction coefficients and Pitzer parameters were calculated, together with protonation constants at infinite dilution: log (T)K(1)(H)=p(T)K(a2)=7.656+/-0.010 and log (T)K(2)(H)=p(T)K(a1)=4.561+/-0.006 (in the molar concentration scale, +/-95% confidence interval). Both SIT and Pitzer approaches give satisfactory results.
Collapse
Affiliation(s)
- Concetta De Stefano
- Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università di Messina, Salita Sperone, 31, I-98166 Messina, Vill. S. Agata, Italy
| | | | | | | |
Collapse
|
24
|
Szabó Z, Furó I, Csöregh I. Combinatorial multinuclear NMR and X-ray diffraction studies of uranium(VI)-nucleotide complexes. J Am Chem Soc 2006; 127:15236-47. [PMID: 16248666 DOI: 10.1021/ja0550273] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The complex formation of uranium(VI) with four nucleotides, adenosine- (AMP), guanosine- (GMP), uridine- (UMP), and cytidine-monophosphate (CMP), has been studied in the alkaline pH range (8.5-12) by (1)H, (31)P, (13)C, and (17)O NMR spectroscopy, providing spectral integral, chemical shift, homo- and heteronuclear coupling, and diffusion coefficient data. We find that two and only two complexes are formed with all ligands in the investigated pH region independently of the total uranium(VI) and ligand concentrations. Although the coordination of the 5'-phosphate group and the 2'- and 3'-hydroxyl groups of the sugar unit to the uranyl ions is similar to that proposed earlier ("Feldman complex"), the number and the structures of the complexes are different. The uranium-to-nucleotide ratio is 6:4 in one of the complexes and 3:3 in the other one, as unambiguously determined by a combinatorial approach using a systematic variation of the ratio of two ligands in ternary uranium(VI)-nucleotide systems. The structure of the 3:3 complex has been determined by single-crystal diffraction as well, and the results confirm the structure proposed by NMR in aqueous solution. The results have important implications on the synthesis of oligonucleotides.
Collapse
Affiliation(s)
- Zoltán Szabó
- Inorganic Chemistry and Physical Chemistry, Department of Chemistry, Royal Institute of Technology (KTH), S-10044 Stockholm, Sweden.
| | | | | |
Collapse
|
25
|
Cael V, Champmartin D, Rubini P. Interactions of aluminium(III) with glycerolphosphates and glycerophosphorylcholine. J Inorg Biochem 2003; 97:97-103. [PMID: 14507465 DOI: 10.1016/s0162-0134(03)00155-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The complexation of aluminium(III) with glycerol-1-phosphate (G1P) and glycerol-2-phosphate (G2P) in aqueous solutions has been studied as a function of pH, by pH-potentiometry, 31P NMR spectroscopy and ESI mass spectrometry. Various mononuclear complexes (MLH(2)(3+), MLH(2+), ML(+), ML(2)H, ML(2)(-)) and polynuclear species (M(3)L(3)H(-1)(2+), M(3)L(2)H(-n)((n-5)-) with n=5, 6, 7, M(2)L(2)H(-1)(+) ) are formed in the system where the full protonated ligands are noted LH(2). NMR experiments clearly show that G1P and G2P already interact with Al(III) at pH 1. The potentiometric results are confirmed by ESI measurements and 31P NMR studies. No metal ion-induced deprotonation and coordination of the alcoholic-OH functions seem to occur during the complexation. The situation is very different for the glycerophosphorylcholine ligand (GPC identical with LH). Only the complex ML(3+) is formed in aqueous solution with a relatively low formation constant (K=5 at 37 degrees C). This species is clearly identified in 31P and 27Al NMR spectra. The complexation study as a function of the temperature allowed us to determine the thermodynamic parameters of the complex formation. The complexation is not governed by the reaction enthalpy that is found to be positive but by the entropy that is largely positive.
Collapse
Affiliation(s)
- V Cael
- Laboratoire de Chimie Physique Organique et Colloi;dale, Université Henri Poincaré-Nancy I, Unité Mixte CNRS-UHP (SRSMC, UMR 7565) BP 239, 54506 Vandoeuvre-Lès-Nancy Cédex, France
| | | | | |
Collapse
|
26
|
Yang X, Bi S, Yang X, Yang L, Hu J, Liu J, Yang Z. NMR spectra and potentiometry studies of aluminum(III) binding with coenzyme NAD+ in acidic aqueous solutions. ANAL SCI 2003; 19:815-21. [PMID: 12834218 DOI: 10.2116/analsci.19.815] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Complexation and conformational studies of coenzyme NAD+ with aluminum were conducted in acidic aqueous solutions (pH 2-5) by means of potentiometry as well as multinuclear (1H, 13C, 31P, 27Al) and two-dimensional (1H, 1H-NOESY) NMR spectroscopy. These led to the following results: (1) Al could coordinate with NAD+ through the following binding sites: N7' of adenine and pyrophosphate free oxygen (O(A)1, O(N)1,O(A)2) to form various mononuclear 1:1 (AlLH23+, AlLH2+) and 2:1 (AlL2-) species, and dinuclear 2:2 (Al2L22+) species. (2) The conformations of NAD+ and Al-NAD+ depended on the solvents and different species in the complexes. The results suggest the occurrence of an Al-linked complexation, which causes structural changes at the primary recognition sites and secondary conformational alterations for coenzymes. This finding will help us to understand role of Al in biological enzyme reaction systems.
Collapse
Affiliation(s)
- Xiaodi Yang
- State Key Laboratory of Coordination Chemistry, Department of Chemistry, Nanjing University, Nanjing, 210093, P.R. China
| | | | | | | | | | | | | |
Collapse
|
27
|
Kilyén M, Forgó P, Lakatos A, Dombi G, Kiss T, Kotsakis N, Salifoglou A. Interaction of Al(III) with the peptides AspAsp and AspAspAsp. J Inorg Biochem 2003; 94:207-13. [PMID: 12628700 DOI: 10.1016/s0162-0134(03)00027-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The interactions of Al(III) with the dipeptide AspAsp and the tripeptide AspAspAsp in aqueous solutions were studied by pH-potentiometry and multinuclear 1H- and 13C- nuclear magnetic resonance (NMR) spectroscopy. Their numerous negatively charged COO(-) functions allow these ligands to bind Al(III) even in weakly acidic solutions. Various mononuclear 1:1 complexes are formed in different protonation states. 13C-NMR spectroscopy unambiguously proved participation of the COO(-) functions in a monodentate or chelating mode in Al(III) binding, however, the terminal-NH(2) group seems to be excluded from the coordination. Depending on the metal ion to ligand ratio precipitation occurs at pH approximately 5 to 6. This indicates that the COO(-) groups at the low level of preorganization in such small peptides are not sufficient to keep the Al(III) ion in solution and to prevent the precipitation of Al(OH)(3) at physiological pH. To achieve this, a more specific arrangement of the side-chain donors seems necessary.
Collapse
Affiliation(s)
- Melinda Kilyén
- Biocoordination Chemistry Research Group of the Hungarian Academy of Sciences, University of Szeged, PO Box 440, Szeged, Hungary
| | | | | | | | | | | | | |
Collapse
|
28
|
|
29
|
Rubini P, Lakatos A, Champmartin D, Kiss T. Speciation and structural aspects of interactions of Al(III) with small biomolecules. Coord Chem Rev 2002. [DOI: 10.1016/s0010-8545(01)00467-2] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
30
|
Jorge RA, Menossi M, Arruda P. Probing the role of calmodulin in Al toxicity in maize. PHYTOCHEMISTRY 2001; 58:415-422. [PMID: 11557073 DOI: 10.1016/s0031-9422(01)00258-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The role of calmodulin on Al toxicity was studied in two maize (Zea mays L.) inbred lines, Cat 100-6 (Al-tolerant) and S 1587-17 (Al-sensitive). Increasing levels of Al induced the release of malate at similar rate by roots of both genotypes, while the exudation of citrate, a stronger Al-binding compound, was 3.5 times higher in Cat 100-6 seedlings exposed to 16.2x10(-6) Al(3+) activity. The calmodulin inhibitor trifluoperazine significantly reduced the root growth in both genotypes, mimicking the main effect of Al. However, when Cat 100-6 and S 1587-17 seedlings were challenged with Al in conjunction with trifluoperazine, no further reduction in root growth or any other effect of Al toxicity was observed. The rate of Al-induced citrate exudation by both genotypes was not affected by treatment with trifluoperazine or calmidazolium, another calmodulin inhibitor. The Al(3+) interaction with cytoplasmic CaM was estimated using models for the binding of Al(3+) and Mg(2+) with CaM and physiological concentrations of citrate, CaM, InsP(3), ATP, ADP, Al(3+) and Mg(2+). In this simulation, Al(3+) associated with citrate and InsP(3), but not with CaM. We conclude that calmodulin is not relevant to the physiological processes leading to the Al tolerance in maize, nor is it a primary target for Al toxicity.
Collapse
Affiliation(s)
- R A Jorge
- Universidade Estadual de Campinas, UNICAMP, Instituto de Química, Departamento de Físico-Química, SP, Campinas, Brazil.
| | | | | |
Collapse
|
31
|
Exley C, Korchazhkina OV. Promotion of formation of amyloid fibrils by aluminium adenosine triphosphate (AlATP). J Inorg Biochem 2001; 84:215-24. [PMID: 11374584 DOI: 10.1016/s0162-0134(01)00171-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The formation of amyloid fibrils is considered to be an important step in the aetiology of Alzheimer's disease and other amyloidoses. Fibril formation in vitro has been shown to depend on many different factors including modifications to the amino acid profile of fibrillogenic peptides and interactions with both large and small molecules of physiological significance. How these factors might contribute to amyloid fibril formation in vivo is not clear as very little is known about the promotion of fibril formation in undersaturated solutions of amyloidogenic peptides. We have used thioflavin T fluorescence and reverse phase high performance liquid chromatography to show that ATP, and in particular AlATP, promoted the formation of thioflavin T-reactive fibrils of beta amyloid and, an unrelated amyloidogenic peptide, amylin. Evidence is presented that induction of fibril formation followed the complexation of AIATP by one or more monomers of the respective peptide. However, the complex formed could not be identified directly and it is suggested that AlATP might be acting as a chaperone in the assembly of amyloid fibrils. The effect of AlATP was not mimicked by either AlADP or AlAMP. However, it was blocked by suramin, a P2 ATP receptor antagonist, and this has prompted us to speculate that the precursor proteins to beta amyloid and amylin may be substrates or receptors for ATP in vivo.
Collapse
Affiliation(s)
- C Exley
- Birchall Centre for Inorganic Chemistry and Materials Science, School of Chemistry and Physics, Keele University, Staffordshire, UK.
| | | |
Collapse
|
32
|
Champmartin D, Rubini P, Lakatos A, Kiss T. Complexes of aluminium(III) with glucose-6-phosphate in aqueous solutions. J Inorg Biochem 2001; 84:13-21. [PMID: 11330472 DOI: 10.1016/s0162-0134(00)00217-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The interaction of aluminium(III) with glucose-6-phosphate (GP: LH2) in aqueous solutions has been studied from pH 1 to pH 8, by pH-potentiometry and multinuclear (31P, 27Al, 13C) NMR spectroscopy. Various mononuclear species (MLH2, MLH, ML, ML2H, ML2 and MLH(-3)) and dinuclear complexes M2L2H-n (n=1-4) are formed in the system. NMR clearly indicates that GP is already bound to Al(III) at pH 1. The potentiometric speciation results are confirmed and completed by spectroscopic experiments. Many peaks are observed in the 31P NMR spectra suggesting the formation of isomeric species. An attempt to assign the signals to the corresponding complexes is made, allowing a discussion about their structure. Interestingly enough no metal ion-induced deprotonation and coordination of the alcoholic-OH functions have been observed.
Collapse
Affiliation(s)
- D Champmartin
- Laboratoire de Chimie Physique Organique et Colloïdale, Université Henri Poincaré-Nancy I, Unité Mixte CNRS-UHP (SRSMC, UMR no. 7565), Vandoeuvre-les-Nancy, France
| | | | | | | |
Collapse
|
33
|
Abstract
Paper ionophoresis is described for the study of equilibria in a mixed ligand complex system in solution. This method is based on the movement of a spot of metal ion in an electric field with the complexants added in the background electrolyte at pH 8.5. The concentration of the primary ligand (nitrilotriacetate) was kept constant, while that of the secondary ligand (penicillamine) was varied. The stability constants of the metal-nitrilotriacetate-penicillamine complexes have been found to be 6.26 +/- 0.09 and 6.68 +/- 0.13 (log K values) for Al3+ and Th4+ complexes, respectively, at 35 degrees C and ionic strength 0.1 M.
Collapse
Affiliation(s)
- B B Tewari
- Department of Chemistry, Faculty of Natural Sciences, University of Guyana, Georgetown.
| |
Collapse
|
34
|
|
35
|
Kiss E, Lakatos A, Bányai I, Kiss T. Interactions of Al(III) with phosphorylated amino acids. J Inorg Biochem 1998. [DOI: 10.1016/s0162-0134(97)10011-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
36
|
Cunat L, Membre H, Marchal L, Chaussidon M, Burnel D. The effects of aluminum, iron, chromium, and yttrium on rat intestinal smooth muscle in vitro. Biol Trace Elem Res 1998; 64:43-59. [PMID: 9845462 DOI: 10.1007/bf02783324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The modification of peristaltic activity in the presence of several metal ions has been investigated in the rat intestine by the isolated organ technique. The metals tested modify the intestinal movements: aluminum, chromium, and yttrium cause a decrease of amplitude, while iron showed no effect. By use of microscopic techniques, the presence of yttrium hydroxide was observed in the intestinal tissues. Iron also appears as a precipitate outside of the intestinal serosal, which may explain why iron did not modify the peristaltism. Chromium and aluminum were not apparent to microscope, despite being detected and quantified in the tissues by means of atomic emission spectrometer. We conclude that the trivalent ions of these elements may operate differently on the mechanisms of intestinal contractions: yttrium precipitates in intercellular spaces, iron precipitates outside the intestines, and chromium and aluminum remain in solution and are distributed homogeneously in the smooth intestinal muscle.
Collapse
Affiliation(s)
- L Cunat
- Laboratoire de Chimie Générale Appliquée à la Médecine, Faculté de Médecine, Université Henri Poincaré, Vandoeuvre les Nancy, France
| | | | | | | | | |
Collapse
|
37
|
|
38
|
Atkári K, Kiss T, Bertani R, Martin RB. Interactions of Aluminum(III) with Phosphates. Inorg Chem 1996; 35:7089-7094. [PMID: 11666891 DOI: 10.1021/ic960329e] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In order to obtain information about aluminum(III)-phosphate interactions, potentiometric measurements were carried out to characterize the complex forming properties of Al(III) with organic phosphates, phosphonates, and nucleoside-5'-monophosphates. The aluminum(III)-orthophosphate system is difficult to study due to AlPO(4) precipitation. To overcome this problem, the stability constant logarithms of the 1:1 Al(III) complexes of ligands with the same donor groups (log K(1:1)) were plotted against the basicities of the ligands (log K(PO)3(H)). The resulting linear free energy relation (LFER) indicates that organic phosphates, phosphonates, and uridine-, thymidine-, and guanosine 5'-monophosphates similarly bind Al(III). Adenosine and cytidine 5'-monophosphate fall above the LFER owing to the presence of a second microform with the nucleic base protonated and a hydroxide bound to the Al(III). From the LFER the log stability constant for Al(III) binding to HPO(4)(2-) is estimated as 6.13 +/- 0.05. From the weakness of any soluble orthophosphate complexes of Al(III) we confirm the importance of citrate as the main small molecule Al(3+) binder in the blood serum. The study includes investigation of Al(III) binding to di- and triphosphates, which bind metal ion differently than monophosphates. Structures of the complexes were supported by (31)P NMR measurements.
Collapse
Affiliation(s)
- Károly Atkári
- Department of Inorganic and Analytical Chemistry, Kossuth University, H-4010 Debrecen, Hungary, Centro di Studio Sulla Chimica e Tecnologia dei Compositi Metallorganici degli Elementi di Transizione, CNR, I-35131 Padova, Italy, and Department of Chemistry, University of Virginia, Charlottesville, Virginia 22903
| | | | | | | |
Collapse
|
39
|
Inoue M, Yamase T. Crystal Structure of the Pentamolybdate Complex Coordinated by Adenosine-5′-monophosphoric Acid. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1996. [DOI: 10.1246/bcsj.69.2863] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
40
|
|
41
|
Interaction of aluminium (III) with phosphate-binding sites: biological aspects and implications. Coord Chem Rev 1996. [DOI: 10.1016/s0010-8545(96)90036-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
42
|
Nelson DJ. Aluminum complexation with nucleoside di- and triphosphates and implication in nucleoside binding proteins. Coord Chem Rev 1996. [DOI: 10.1016/s0010-8545(96)90016-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
43
|
|
44
|
Vaidyan AV, Bhattacharya PK. Intramolecular interligand interaction in zinc(II) and cadmium(II) mixed ligand complexes of ATP and aminoacids or dipeptides or phenolic compounds. J CHEM SCI 1996. [DOI: 10.1007/bf02872520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
45
|
Kiss T. Interaction of aluminum with biomolecules — any relevance to Alzheimer's disease? Arch Gerontol Geriatr 1995; 21:99-112. [PMID: 15374229 DOI: 10.1016/0167-4943(95)00642-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/1994] [Revised: 12/05/1994] [Accepted: 03/30/1995] [Indexed: 11/17/2022]
Abstract
The possible involvement of aluminum in Alzheimer's disease (AD) is discussed focusing, on the one hand, on a critical review of the analytical results concerning the brain aluminum content of AD patients, and on the other hand, on the in vitro interactions of AI(III) with biologically relevant potential AI(III) binders occurring in intracellular and/or extracellular fluids. The biomolecules considered are such as amino acids, organic and inorganic phosphates, nucleotides, catecholamines and transferrin. It is quite clear from the results that definition of the actual AI(III) species present in the biological systems is essentially important in any studies of the neurotoxic role of aluminum.
Collapse
Affiliation(s)
- T Kiss
- Department of Inorganic and Analytical Chemistry, Kossuth University, H-4010 Debrecen, POB. 21, Hungary
| |
Collapse
|
46
|
Wang X, Simpson JH, Nelson DJ. 1H and 31P NMR study of speciation in systems containing ADP, Al3+, and fluoride. J Inorg Biochem 1995; 58:29-47. [PMID: 7738538 DOI: 10.1016/0162-0134(94)00035-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
It has been proposed that AlF4- can serve as a tetrahedral pseudophosphate bound to guanosine diphosphate (GDP) [or other nucleoside diphosphates (NDP)] in G-protein systems. In a previous paper [D. J. Nelson and R. B. Martin, J. Inorg. Biochem. 43, 37 (1991)], 19F and 1H NMR were used to analyze the ternary system Al(3+)-NDP-F- in aqueous solutions. Ternary complexes (NDP)AlFx (with x = 1-3) were identified, but no (NDP)AlF4 was found. In this paper, the equilibrium constants for ternary complex formation that were obtained in the previous paper were further tested in a more extensive 1H and 31P NMR study of speciation in systems that contained Al3+, F-, and adenosine 5'-diphosphate (ADP). The results of the study are in general support of previously derived constants for ternary complexes and also provide support for the existence at relatively high ADP concentration (approximately 10 mM) of a base-stacked intermolecular dihydroxy-di-Al3+ bridged ADP dimeric structure at an ADP to Al3+ molar ratio of 1:1. 31P NMR of the dimer reveals that each of the two Al3+ ions is bidentately coordinated to the alpha and beta phosphates of a single (but different) ADP molecule. Evidence is also presented for the existence at relatively low ADP concentration (approximately 0.5 mM) of a monomeric species in which a single Al3+ ion is coordinated to alpha and beta phosphates of a single ADP molecule. 1H NMR of the monomeric species reveals the expected "wrong-way chemical shift" of the adenine C8 proton upon Al3+ ion complexation to the phosphate chain.
Collapse
Affiliation(s)
- X Wang
- Gusfaf H. Carlson School of Chemistry, Clark University, Worcester, Massachusetts 01610
| | | | | |
Collapse
|
47
|
Mernissi-Arifi K, Bieth H, Schlewer G, Spiess B. Complexation studies on inositol-phosphates, VI. Al3+ complexes of DL-myo-inositol 1,4,5-triphosphate and D-myo-inositol 1,2,6-triphosphate. J Inorg Biochem 1995. [DOI: 10.1016/0162-0134(94)00018-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
48
|
Alberico E, Dewaele D, Kiss T, Micera G. Oxovanadium(IV) complexation by adenosine 5′-di-and -tri-phosphate and nucleotide building blocks. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/dt9950000425] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
49
|
Kiss T, Sóvágó I, Martin R, Pursiainen J. Ternary complex formation between Al(III)-adenosine-5′-phosphates and carboxylic acid derivatives. J Inorg Biochem 1994. [DOI: 10.1016/0162-0134(94)85132-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
50
|
Exley C, Price NC, Birchall JD. Aluminum inhibition of hexokinase activity in vitro: a study in biological availability. J Inorg Biochem 1994; 54:297-304. [PMID: 8014638 DOI: 10.1016/0162-0134(94)80035-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We have used the HK/G6PDH coupled enzyme assay to determine the biological availability of aluminum in mixed-ligand media of biological interest. The biological availability of aluminum was measured as the inhibition of the activity rate of the assay and was shown to be dependent upon the equilibration state of the aluminum stock solutions (prior to their addition to the assay) and the comparative reaction kinetics of competitive aluminum equilibria in the assays. Aluminum was found to inhibit the assay, however, the inhibition by aluminum was abolished when silicic acid was present in both the aluminum stock solution and the assay medium. The assay is proposed as a model system for investigating the biological availability of aluminum in heterogenous media of biochemical significance.
Collapse
Affiliation(s)
- C Exley
- Department of Chemistry, Keele University, Staffordshire, U.K
| | | | | |
Collapse
|