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Abu-Taweel GM, Al-Mutary MG. Pomegranate juice rescues developmental, neurobehavioral and biochemical disorders in aluminum chloride-treated male mice. J Trace Elem Med Biol 2021; 63:126655. [PMID: 33045674 DOI: 10.1016/j.jtemb.2020.126655] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 08/13/2020] [Accepted: 09/22/2020] [Indexed: 12/21/2022]
Abstract
PURPOSE Aluminum (Al) is a harmful metal to organisms and is capable of entering the human body in multiple ways, such as through drinking, breathing, deodorant use, and vaccination. This study examined the prospective toxicity of Al and the protective attributes of pomegranate juice (PJ) on neurobehavioral and biochemical parameters of male mice. METHODS Six groups of male mice were treated for 35 days with 20 % PJ (group II), 40 % PJ (group III), 400 mg/kg Al (group IV), Al + 20 % PJ (group V), Al + 40 % PJ (group VI) or tap water (control, group I). Behavioral assessments were conducted for learning and memory evaluations at the end of experiment. In addition, the forebrain was isolated for biochemical analysis. RESULTS The exposure of male mice to Al decreased learning and memory retention in the shuttle box, Morris water-maze and T-Maze tests. Biochemical analysis revealed significant depletions in neurotransmitters including DA, 5-HT and AChE and oxidative proteins including GSH, GST, CAT and SOD and increased TBARES levels in Al-treated mice compared to untreated mice. Pomegranate juice provided protection against these effects after Al exposure by ameliorating learning and memory retention and oxidative state in a dose-independent manner. CONCLUSION Our data demonstrated that Al exposure caused behavioral and biochemical disorders. Pomegranate juice in lower dose has beneficial properties for health and can be used as a source of antioxidants to reduce the toxicity of Al and other substances.
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Affiliation(s)
- Gasem Mohammad Abu-Taweel
- Department of Biology, College of Sciences, Jazan University, P.O. Box 2079, Jazan 45142, Saudi Arabia
| | - Mohsen Ghaleb Al-Mutary
- Department of Basic Sciences, College of Education, Imam Abdulrahman Bin Faisal University, P.O. Box 2375, Dammam, 14513, Saudi Arabia; Basic and Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia.
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Liu L, Sun B, Ding R, Mao Y. Theoretical Investigations on the Excited-State Dynamics of an Al 3+ Fluorescence Sensor. J Phys Chem A 2020; 124:11093-11101. [PMID: 33325702 DOI: 10.1021/acs.jpca.0c09977] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Twisted internal charge transfer (TICT) states are of fundamental importance during the photo-physical processes of dyes and sensors. In this contribution, excited-state dynamics of an Al3+ fluorescence sensor 1-{[(2-hydroxyphenyl)-imino]methyl}naphthalen-2-ol based on the turn-on signal is clarified. Two different dark TICT states are observed by exploring the excited-state potential energy surface. With the twist of the C2-N bond, the two dark states can be reached facilely, which induce the experimentally observed weak fluorescence of the sensor. The sensing mechanism is then uncovered by investigating the electronic coupling between the sensor and analyte. Al3+ is proved to form strong coordination bonds with the sensor, which restricts the motion of the C2-N bond. Consequently, the TICT states are eliminated, which generate the turn-on signal. This sensing mechanism is trustworthy and intrinsically different from the previously proposed one, which would shed some light on the design of turn-on sensors.
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Affiliation(s)
- Lei Liu
- College of Chemical and Materials Engineering, Anhui Science and Technology University, Fengyang 233100, P. R. China.,State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Bingqing Sun
- College of Resource and Environment, Anhui Science and Technology University, Fengyang 233100, P. R. China
| | - Ran Ding
- College of Chemical and Materials Engineering, Anhui Science and Technology University, Fengyang 233100, P. R. China
| | - Yueyuan Mao
- College of Chemical and Materials Engineering, Anhui Science and Technology University, Fengyang 233100, P. R. China
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Jebur AB, El-Demerdash FM, Kang W. Bromelain from Ananas comosus stem attenuates oxidative toxicity and testicular dysfunction caused by aluminum in rats. J Trace Elem Med Biol 2020; 62:126631. [PMID: 32763766 DOI: 10.1016/j.jtemb.2020.126631] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 07/20/2020] [Accepted: 07/29/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Aluminum (Al) has been reported to induce testicular injury via oxidative stress. Ananas comosus stem extract is an inexpensive byproduct waste rich in bromelain which is a group of sulfur-containing enzymes known for its biological activities and medicinal applications. So, the current investigation aims to evaluate the efficacy of bromelain in counteracting oxidative injury and testicular dysfunction stimulated by aluminum in rats. METHODS Male adult Wistar rats were divided into four groups. The first group used as control, however, the second and third groups were received bromelain (250 mg/kg) and AlCl3 (34 mg/Kg, 1/25 LD50), and the fourth group supplemented with bromelain one hour before AlCl3 intoxication, respectively. Bromelain was administered daily while AlCl3 was given every other day by oral gavages for one month. RESULTS Al intoxicated animals revealed an elevation in lipid peroxidation (TBARS and H2O2) level and lactate dehydrogenase (LDH) activity. However, reduced glutathione (GSH) and protein contents, antioxidant enzymes (SOD, CAT, GPx, GR, GST), phosphatases (ALP, AcP) and aminotransferases (AST, ALT) activities were significantly reduced. Additionally, considerable amendments in hormonal levels (testosterone, luteinizing and follicle-stimulating hormone) and sperm characteristics were spotted. Further, histological variations in the testes section were detected and this supports the biochemical observations. Otherwise, rats supplemented with bromelain alone diminished TBARS and H2O2 and augmented mostly other parameters. Furthermore, supplementation with bromelain before Al intoxication in rats exhibited worthy betterment in oxidative stress markers, hormones, and sperm quality compared to Al treated group. CONCLUSION In conclusion, bromelain had a powerful protective role against Al-induced testicular dysfunction so, it represents a novel approach in metal toxicity processing.
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Affiliation(s)
- Ali B Jebur
- College of Science, Al-Qasim Green University, Iraq.
| | - Fatma M El-Demerdash
- Department of Environmental Studies, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt.
| | - Wenyi Kang
- National R & D Center for Edible Fungus Processing Technology, Henan University, Kaifeng, China.
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Chen J, Jiang W, Lu W, Xu L, Yang S, Xue H, Shi J, Sun X. A Study on the Interaction between New Indole Amide Compound and Aluminum(III) Ion. ChemistrySelect 2019. [DOI: 10.1002/slct.201900217] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Jichao Chen
- College of ScienceNanjing Forestry University Nanjing 210037 China
| | - Weina Jiang
- College of Chemical EngineeringNanjing Forestry University Nanjing 210037 China
| | - Wen Lu
- College of ScienceNanjing Forestry University Nanjing 210037 China
| | - Li Xu
- College of ScienceNanjing Forestry University Nanjing 210037 China
- Southern Modern Forestry Collaborative Innovation Center of Nanjing Forestry University, Nanjing 210037 China
| | - Shilong Yang
- Advanced Analysis and Testing CenterNanjing Forestry University, Nanjing, 210037 China
| | - Huayu Xue
- College of Chemical EngineeringNanjing Forestry University Nanjing 210037 China
| | - Jiuzhou Shi
- College of ScienceNanjing Forestry University Nanjing 210037 China
| | - Xu Sun
- Advanced Analysis and Testing CenterNanjing Forestry University, Nanjing, 210037 China
- College of Information Science and TechnologyNanjing Forestry University, 210037 China
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Reina de la Torre ML, Lopez García de la Serrana H, Martí Del Moral L, Palomares Bayo M, Navarro-Alarcón M. Increased Serum Al Levels in Hemodialysis Patients Kept Enhanced during a 2-Year Prospective Study. Biol Trace Elem Res 2017; 178:7-13. [PMID: 27905009 DOI: 10.1007/s12011-016-0902-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 11/22/2016] [Indexed: 12/16/2022]
Abstract
The regulation of mineral homeostasis is altered in hemodialysis patients with renal insufficiency, producing increased risk for secondary diseases like cardiovascular ones. We hypothesized that risen serum aluminum (Al) concentration in hemodialysis patients kept enhanced during a 2-year longitudinal study is associated with enhanced cardiovascular risk and influenced by medical treatments. This study reports the prospective monitoring of serum Al levels in six-monthly samplings over 2 years in 116 hemodialysis patients and a control group of 50 healthy adults. The influence of other factors like sex, age, kidney transplant, disease etiology, and drug consumption was also considered. At each sampling, serum Al levels were significantly higher in the patients than in the healthy controls (P < 0.05). Levels in the patient group were statistically significantly lower at the third and fourth versus first and second samplings, which may be related to Al accumulation in tissues. Increased Al levels in patients were positively and significantly related to serum calcium (Ca) and uric acid levels. Serum Al concentrations were significantly lower in patients receiving vasodilators and diuretics. Higher serum Al levels in hemodialyzed patients administered with phosphate binders or anti-hyperkalemics are attributable to their usual Al salt content. The consumption of antianemic drugs increases Al absorption by forming more bioavailable complexes with the compounds in these drugs. In conclusion, this is the first study to indicate that cardiovascular problems associated with elevated serum Al levels in hemodialysis patients may be in part mitigated by administrating vasodilators and diuretics, which reduce these levels.
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Affiliation(s)
- Maria L Reina de la Torre
- Department of Nutrition and Food Science, School of Pharmacy, University of Granada, 18071, Granada, Spain
| | | | - Loreto Martí Del Moral
- Department of Nutrition and Food Science, School of Pharmacy, University of Granada, 18071, Granada, Spain
| | | | - Miguel Navarro-Alarcón
- Department of Nutrition and Food Science, School of Pharmacy, University of Granada, 18071, Granada, Spain.
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Mohamed NES, Abd El-Moneim AE. Ginkgo biloba extract alleviates oxidative stress and some neurotransmitters changes induced by aluminum chloride in rats. Nutrition 2017; 35:93-99. [DOI: 10.1016/j.nut.2016.10.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 10/16/2016] [Accepted: 10/17/2016] [Indexed: 12/26/2022]
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Guo A, Zhu R, Ren Y, Dong J, Feng L. A "turn-on" fluorescent chemosensor for aluminum ion and cell imaging application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 153:530-4. [PMID: 26421494 DOI: 10.1016/j.saa.2015.09.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 09/02/2015] [Accepted: 09/20/2015] [Indexed: 05/08/2023]
Abstract
A simple and efficient fluorescent chemosensor for Al(3+) is reported in the paper. The chemosensor is obtained by dehydration reaction of 2-hydroxy-1-naphthaldehyde and 2-aminophenol. The chemosensor has high selectivity and sensitivity for Al(3+) and displays fluorescence "off-on" switch signal. The detection limit of the chemosensor for Al(3+) can reach 1.0×10(-7) M in DMSO/H2O (1:9, v/v) solution. The mass spectra and Job's plot analysis confirm the 1:1 stoichiometry between chemosensor and Al(3+). Potential utilization of the probe as an intracellular sensor of Al(3+) in human cancer (HiSa) cells is also examined by confocal fluorescence microscopy.
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Affiliation(s)
- Ailing Guo
- School of Chinese Materia Medica, Shanxi University of Traditional Chinese Medicine, Taiyuan 030024, PR China
| | - Ruitao Zhu
- Department of Chemistry, Taiyuan Normal University, Taiyuan 030031, PR China.
| | - Yuehong Ren
- Department of Chemistry, Taiyuan Normal University, Taiyuan 030031, PR China
| | - Jinlong Dong
- Department of Chemistry, Taiyuan Normal University, Taiyuan 030031, PR China
| | - Liheng Feng
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China.
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Dermience M, Lognay G, Mathieu F, Goyens P. Effects of thirty elements on bone metabolism. J Trace Elem Med Biol 2015; 32:86-106. [PMID: 26302917 DOI: 10.1016/j.jtemb.2015.06.005] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 05/07/2015] [Accepted: 06/19/2015] [Indexed: 01/19/2023]
Abstract
The human skeleton, made of 206 bones, plays vital roles including supporting the body, protecting organs, enabling movement, and storing minerals. Bones are made of organic structures, intimately connected with an inorganic matrix produced by bone cells. Many elements are ubiquitous in our environment, and many impact bone metabolism. Most elements have antagonistic actions depending on concentration. Indeed, some elements are essential, others are deleterious, and many can be both. Several pathways mediate effects of element deficiencies or excesses on bone metabolism. This paper aims to identify all elements that impact bone health and explore the mechanisms by which they act. To date, this is the first time that the effects of thirty minerals on bone metabolism have been summarized.
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Affiliation(s)
- Michael Dermience
- University of Liège - Gembloux Agro Bio Tech, Unit Analyzes, Quality, Risks, Laboratory of Analytical Chemistry, Passage des Déportés, 2, B-5030 Gembloux, Belgium.
| | - Georges Lognay
- University of Liège - Gembloux Agro Bio Tech, Unit Analyzes, Quality, Risks, Laboratory of Analytical Chemistry, Passage des Déportés, 2, B-5030 Gembloux, Belgium.
| | - Françoise Mathieu
- Kashin-Beck Disease Fund asbl-vzw, Rue de l'Aunee, 6, B-6953 Forrieres, Belgium.
| | - Philippe Goyens
- Kashin-Beck Disease Fund asbl-vzw, Rue de l'Aunee, 6, B-6953 Forrieres, Belgium; Department and Laboratory of Pediatric, Free Universities of Brussels, Brussels, Belgium.
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Zhou D, Sun C, Chen C, Cui X, Li W. Research of a highly selective fluorescent chemosensor for aluminum(III) ions based on photoinduced electron transfer. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.09.050] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Sivakumar S, Khatiwada CP, Sivasubramanian J. Studies the alterations of biochemical and mineral contents in bone tissue of mus musculus due to aluminum toxicity and the protective action of desferrioxamine and deferiprone by FTIR, ICP-OES, SEM and XRD techniques. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 126:59-67. [PMID: 24583473 DOI: 10.1016/j.saa.2014.01.136] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 01/22/2014] [Accepted: 01/27/2014] [Indexed: 06/03/2023]
Abstract
The present study has attempt to analyze the changes in the biochemical and mineral contents of aluminum intoxicated bone and determine the protective action of desferrioxamine (DFO) and deferiprone (DFP) by using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), inductively coupled plasma optical emission spectroscopy (ICP-OES), and scanning electron microscopy (SEM) techniques for four groups of animals such as control (Group I), aluminum intoxicated (Group II), Al+DFP (Group III) and Al+DFO+DFP (Group IV) treated groups respectively. The FTIR spectra of the aluminum intoxicated bone showed significant alteration in the biochemical constituents. The bands ratio at I1400/I877 significantly decreased from control to aluminum, but enhanced it by Al+DFP to Al+DFO+DFP treated bone tissue for treatments of 16 weeks. This result suggests that DFO and DFP are the carbonate inhibitor, recovered from chronic growth of bone diseases and pathologies. The alteration of proteins profile indicated by Amide I and Amide II, where peak area values decreased from control to aluminum respectively, but enhanced by treated with DFP (p.o.) and DFO+DFP (i.p.) respectively. The XRD analysis showed a decrease in crystallinity due to aluminum toxicity. Further, the Ca, Mg, and P contents of the aluminum exposed bone were less than those of the control group, and enhanced by treatments with DFO and DFP. The concentrations of trace elements were found by ICP-OES. Therefore, present study suggests that due to aluminum toxicity severe loss of bone minerals, decrease in the biochemical constituents and changes in the surface morphology.
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Affiliation(s)
- S Sivakumar
- Department of Physics, Annamalai University, Annamalai Nagar, Tamil Nadu 608002, India.
| | | | - J Sivasubramanian
- Department of Physics, Annamalai University, Annamalai Nagar, Tamil Nadu 608002, India
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Willhite CC, Ball GL, McLellan CJ. Total allowable concentrations of monomeric inorganic aluminum and hydrated aluminum silicates in drinking water. Crit Rev Toxicol 2012; 42:358-442. [DOI: 10.3109/10408444.2012.674101] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Shati A, Elsaid F, Hafez E. Biochemical and molecular aspects of aluminium chloride-induced neurotoxicity in mice and the protective role of Crocus sativus L. extraction and honey syrup. Neuroscience 2011; 175:66-74. [DOI: 10.1016/j.neuroscience.2010.11.043] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Revised: 10/16/2010] [Accepted: 11/21/2010] [Indexed: 10/18/2022]
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Dzoma B, Moralo R, Motsei L, Ndou R, Bakunz F. Preliminary Findings on the Levels of Five Heavy Metals in Water, Sediments, Grass and Various Specimens from Cattle Grazing and Watering in Potentially Heavy Metal Polluted Areas of the North West Province of South Africa. ACTA ACUST UNITED AC 2010. [DOI: 10.3923/javaa.2010.3026.3033] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Newairy ASA, Salama AF, Hussien HM, Yousef MI. Propolis alleviates aluminium-induced lipid peroxidation and biochemical parameters in male rats. Food Chem Toxicol 2009; 47:1093-8. [DOI: 10.1016/j.fct.2009.01.032] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Effects of an aluminum-water treatment residual on performance and mineral status of feeder lambs. Small Rumin Res 2007. [DOI: 10.1016/j.smallrumres.2006.11.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Krewski D, Yokel RA, Nieboer E, Borchelt D, Cohen J, Harry J, Kacew S, Lindsay J, Mahfouz AM, Rondeau V. Human health risk assessment for aluminium, aluminium oxide, and aluminium hydroxide. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2007; 10 Suppl 1:1-269. [PMID: 18085482 PMCID: PMC2782734 DOI: 10.1080/10937400701597766] [Citation(s) in RCA: 512] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Affiliation(s)
- Daniel Krewski
- Department of Epidemiology and Community Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.
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Mailloux RJ, Appanna VD. Aluminum toxicity triggers the nuclear translocation of HIF-1alpha and promotes anaerobiosis in hepatocytes. Toxicol In Vitro 2006; 21:16-24. [PMID: 16979867 DOI: 10.1016/j.tiv.2006.07.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2006] [Revised: 06/13/2006] [Accepted: 07/06/2006] [Indexed: 10/24/2022]
Abstract
Although aluminum (Al) is known to be toxic, the exact molecular events that enable this trivalent metal to be involved in various diseases have not been fully delineated. In this report, we show that Al promotes the translocation of the HIF-1alpha (hypoxia inducible factor) to the nucleus and activates the anaerobic metabolism of D-glucose. Al-exposed hepatocytes (HepG2 cells) showed a marked increase in HIF-1alpha that was associated with nuclear extracts. D-Glucose consumption in these Al-stressed cells was rapid as more GLUT-1 transporter was expressed. Furthermore, these Al-treated HepG2 cells were characterized with enhanced activities of such metabolic enzymes as hexokinase (HK), pyruvate kinase (PK), lactate dehydrogenase (LDH) and glucose 6-phosphate dehydrogenase (G6PDH). (13)C- NMR studies pointed to a metabolic profile in Al-stressed cells that favored enhanced glycolysis. HPLC analyses confirmed increased glycolytic ATP production in Al-exposed hepatocytes. These findings reveal the ability of Al to create a hypoxic environment that promotes the translocation of HIF-1alpha to the nucleus and stimulates the anaerobic metabolism of D-glucose.
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Affiliation(s)
- Ryan J Mailloux
- Department of Chemistry and Biochemistry, Laurentian University, Sudbury, Ont., Canada P3E 2C6
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Orihuela D, Meichtry V, Pizarro M. Aluminium-induced impairment of transcellular calcium absorption in the small intestine: calcium uptake and glutathione influence. J Inorg Biochem 2006; 99:1879-86. [PMID: 16055194 DOI: 10.1016/j.jinorgbio.2005.07.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2005] [Revised: 07/03/2005] [Accepted: 07/04/2005] [Indexed: 01/02/2023]
Abstract
Aluminium (Al) has been recognised as a cause of bone tissue disorders. The aims of this work were to investigate: (i) whether Al affects calcium (Ca) entry into enterocyte, and (ii) the possibility that the Al effect upon calbindin-D-related Ca transport would be influenced by intestinal glutathione (GSH) levels. In isolated chicken duodenal enterocytes, 100 microM Al lactate produced a decrease in both, the maximum uptake rate and the affinity constant of 45Ca uptake (CaUPT). This effect of Al on CaUPT was concentration-dependent in the micromolar range, showing an inhibitory saturation type phenomenon which appeared to be higher at pH 6.5 than at pH 7.4, and was not modified by the Ca channel activators A23187 and capsaicin. The simultaneous administration of Al (50 mg elemental Al/kg body weight, as AlCl3) and GSH (10 mmol/kg body weight) to rats during 7 days, prevented the inhibitory effects of Al on Ca transport. The protective effect of GSH was accompanied by an increased duodenal calbindin-D9k expression. Experimental depletion of intestinal GSH by means of D,L-buthionin-[S,R] sulfoximine, a gamma-glutamylcystein-synthase inhibitor, given as a single i.p. dose of 2 mmol/kg body weight, enhanced the degree of reduction of Ca absorption ascribed to Al. Our results suggest that Al might interfere Ca uptake by enterocytes through a general effect on cell membrane, and that an oxidative stress state induced by Al would reduce intestine GSH level affecting calbindin-D function and/or synthesis, thus leading to a reduced transcellular Ca absorption in the small intestine.
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Affiliation(s)
- Daniel Orihuela
- Laboratorio de Investigaciones Fisiológicas Experimentales, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Piso 4, Ciudad Universitaria, Paraje El Pozo (3000) Santa Fe, Argentina.
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