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Turkez H, Yıldırım S, Sahin E, Arslan ME, Emsen B, Tozlu OO, Alak G, Ucar A, Tatar A, Hacimuftuoglu A, Keles MS, Geyikoglu F, Atamanalp M, Saruhan F, Mardinoglu A. Boron Compounds Exhibit Protective Effects against Aluminum-Induced Neurotoxicity and Genotoxicity: In Vitro and In Vivo Study. TOXICS 2022; 10:428. [PMID: 36006107 PMCID: PMC9413983 DOI: 10.3390/toxics10080428] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 07/18/2022] [Accepted: 07/26/2022] [Indexed: 02/04/2023]
Abstract
Genetic, neuropathological and biochemical investigations have revealed meaningful relationships between aluminum (Al) exposure and neurotoxic and hematotoxic damage. Hence, intensive efforts are being made to minimize the harmful effects of Al. Moreover, boron compounds are used in a broad mix of industries, from cosmetics and pharmaceuticals to agriculture. They affect critical biological functions in cellular events and enzymatic reactions, as well as endocrinal and mineral metabolisms. There are limited dose-related data about boric acid (BA) and other boron compounds, including colemanite (Col), ulexite (UX) and borax (BX), which have commercial prominence. In this study, we evaluate boron compounds' genetic, cytological, biochemical and pathological effects against aluminum chloride (AlCl3)-induced hematotoxicity and neurotoxicity on different cell and animal model systems. First, we perform genotoxicity studies on in vivo rat bone marrow cells and peripheric human blood cultures. To analyze DNA and chromosome damage, we use single cell gel electrophoresis (SCGE or comet assay) and micronucleus (MN) and chromosome aberration (CA) assays. The nuclear division index (NDI) is used to monitor cytostasis. Second, we examine the biochemical parameters (superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px), malondialdehyde (MDA), total antioxidant capacity (TAC) and total oxidative status (TOS)) to determine oxidative changes in blood and brain. Next, we assess the histopathological alterations by using light and electron microscopes. Our results show that Al increases oxidative stress and genetic damage in blood and brain in vivo and in vitro studies. Al also led to severe histopathological and ultrastructural alterations in the brain. However, the boron compounds alone did not cause adverse changes based on the above-studied parameters. Moreover, these compounds exhibit different levels of beneficial effects by removing the harmful impact of Al. The antioxidant, antigenotoxic and cytoprotective effects of boron compounds against Al-induced damage indicate that boron may have a high potential for use in medical purposes in humans. In conclusion, our analysis suggests that boron compounds (especially BA, BX and UX) can be administered to subjects to prevent neurodegenerative and hematological disorders at determined doses.
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Affiliation(s)
- Hasan Turkez
- Department of Medical Biology, Faculty of Medicine, Atatürk University, 25240 Erzurum, Turkey;
| | - Serkan Yıldırım
- Department of Pathology, Faculty of Veterinary, Atatürk University, 25240 Erzurum, Turkey;
| | - Elvan Sahin
- Department of Histology and Embryology, Faculty of Medicine, Sakarya University, 54050 Sakarya, Turkey;
| | - Mehmet Enes Arslan
- Department of Molecular Biology and Genetics, Faculty of Science, Erzurum Technical University, 25050 Erzurum, Turkey; (M.E.A.); (O.O.T.)
| | - Bugrahan Emsen
- Department of Biology, Kamil Özdağ Faculty of Science, Karamanoğlu Mehmetbey University, 70200 Karaman, Turkey;
| | - Ozlem Ozdemir Tozlu
- Department of Molecular Biology and Genetics, Faculty of Science, Erzurum Technical University, 25050 Erzurum, Turkey; (M.E.A.); (O.O.T.)
| | - Gonca Alak
- Department of Aquaculture, Faculty of Fisheries, Atatürk University, 25240 Erzurum, Turkey; (G.A.); (A.U.); (M.A.)
| | - Arzu Ucar
- Department of Aquaculture, Faculty of Fisheries, Atatürk University, 25240 Erzurum, Turkey; (G.A.); (A.U.); (M.A.)
| | - Abdulgani Tatar
- Department of Medical Genetics, Medical Faculty, Atatürk University, 25240 Erzurum, Turkey;
| | - Ahmet Hacimuftuoglu
- Department of Medical Pharmacology, Medical Faculty, Atatürk University, 25240 Erzurum, Turkey; (A.H.); (F.S.)
| | - Mevlut Sait Keles
- Department of Biochemistry, Medical Faculty, Uskudar University, 34664 Istanbul, Turkey;
| | - Fatime Geyikoglu
- Department of Biology, Faculty of Arts and Sciences, Atatürk University, 25240 Erzurum, Turkey;
| | - Muhammed Atamanalp
- Department of Aquaculture, Faculty of Fisheries, Atatürk University, 25240 Erzurum, Turkey; (G.A.); (A.U.); (M.A.)
| | - Fatih Saruhan
- Department of Medical Pharmacology, Medical Faculty, Atatürk University, 25240 Erzurum, Turkey; (A.H.); (F.S.)
| | - Adil Mardinoglu
- Science for Life Laboratory, KTH-Royal Institute of Technology, 114 28 Stockholm, Sweden
- Centre for Host-Microbiome Interactions, Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College London, London WC2R 2LS, UK
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Kutlubay R, Oğuz EO, Can B, Güven MC, Sinik Z, Tuncay OL. Vitamin E Protection from Testicular Damage Caused by Intraperitoneal Aluminium. Int J Toxicol 2016; 26:297-306. [PMID: 17661220 DOI: 10.1080/10915810701470952] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Different forms of Aluminium (Al) are environmental xenobiotics that induce free radical–mediated cytotoxicity and reproductive toxicity. Vitamin E ( α-tocopherol) is an antioxidative agent that has been reported to be important for detoxification pathways. This study was thus aimed at elucidating the protective effects of vitamin E towards aluminium toxicity on the histology of the rat testis. Al (5 mg/kg body weight) was administered intraperitoneally in 2 ml saline, either alone or immediately before vitamin E (500 mg/kg body weight), at a different point of abdomen, and the alterations in the testis tissue were analyaed histologically. Seven treated animals were sacrificed for each group, with the testes removed and examined histologically. In the Al-treated group, the germinal epithelium of the seminiferous tubules was thinner in places and spermatids were almost absent; sperm numbers were low and there were no sperm in the lumen. In the Al plus vitamin E rats, there were large numbers of spermatids and sperm in the seminiferous tubule lumen. In the vitamin E alone group, a normal histology was seen. Electron microscopically, in the Al-treated group there were irregularities in the nuclear membrane, some damaged mitochondria, a decrease in the number of ribosomes, and an increase in the number of lysosomes in the sertoli cell cytoplasm. In the primary spermatocyte cytoplasm, there was an increase in the rough endoplasmic reticulum. In the Al plus vitamin E group, the spermatogeneic cells and the sertoli cell cytoplasm showed an almost normal appearance. The ultrastructure of the testis in the vitamin E alone group showed a normal appearance. In conclusion, vitamin E antagonizes the toxic effects of Al at the histological level, thus potentially contributing to an amelioration of the testis histology in the Al-treated rats. The associated biochemical parameters merit further investigation.
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Affiliation(s)
- Recep Kutlubay
- Department of Histology and Embryology, Faculty of Medicine, Pamukkale University, Denizli, Turkey
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Demirkaya K, Can Demirdöğen B, Öncel Torun Z, Erdem O, Çetinkaya S, Akay C. In vivo evaluation of the effects of hydraulic calcium silicate dental cements on plasma and liver aluminium levels in rats. Eur J Oral Sci 2015; 124:75-81. [DOI: 10.1111/eos.12238] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/11/2015] [Indexed: 11/28/2022]
Affiliation(s)
- Kadriye Demirkaya
- Department of Restorative Dentistry and Endodontics; Gülhane Military Medical Academy; Ankara Turkey
| | - Birsen Can Demirdöğen
- Department of Biomedical Engineering; TOBB University of Economics and Technology; Ankara Turkey
| | - Zeynep Öncel Torun
- Department of Restorative Dentistry and Endodontics; Gülhane Military Medical Academy; Ankara Turkey
| | - Onur Erdem
- Department of Toxicology; Gülhane Military Medical Academy; Ankara Turkey
| | - Serdar Çetinkaya
- Department of Toxicology; Gülhane Military Medical Academy; Ankara Turkey
| | - Cemal Akay
- Department of Toxicology; Gülhane Military Medical Academy; Ankara Turkey
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Dórea JG. Exposure to mercury and aluminum in early life: developmental vulnerability as a modifying factor in neurologic and immunologic effects. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:1295-313. [PMID: 25625408 PMCID: PMC4344667 DOI: 10.3390/ijerph120201295] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 01/20/2015] [Indexed: 01/15/2023]
Abstract
Currently, ethylmercury (EtHg) and adjuvant-Al are the dominating interventional exposures encountered by fetuses, newborns, and infants due to immunization with Thimerosal-containing vaccines (TCVs). Despite their long use as active agents of medicines and fungicides, the safety levels of these substances have never been determined, either for animals or for adult humans—much less for fetuses, newborns, infants, and children. I reviewed the literature for papers reporting on outcomes associated with (a) multiple exposures and metabolism of EtHg and Al during early life; (b) physiological and metabolic characteristics of newborns, neonates, and infants relevant to xenobiotic exposure and effects; (c) neurobehavioral, immunological, and inflammatory reactions to Thimerosal and Al-adjuvants resulting from TCV exposure in infancy. Immunological and neurobehavioral effects of Thimerosal-EtHg and Al-adjuvants are not extraordinary; rather, these effects are easily detected in high and low income countries, with co-exposure to methylmercury (MeHg) or other neurotoxicants. Rigorous and replicable studies (in different animal species) have shown evidence of EtHg and Al toxicities. More research attention has been given to EtHg and findings have showed a solid link with neurotoxic effects in humans; however, the potential synergic effect of both toxic agents has not been properly studied. Therefore, early life exposure to both EtHg and Al deserves due consideration.
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Affiliation(s)
- José G Dórea
- Department of Nutrition, Faculty of Health Sciences, Universidade de Brasilia, 70919-970 DF Brasilia, Brazil.
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Jolly S, Jaffal A, Delahaut L, Palluel O, Porcher JM, Geffard A, Sanchez W, Betoulle S. Effects of aluminium and bacterial lipopolysaccharide on oxidative stress and immune parameters in roach, Rutilus rutilus L. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:13103-17. [PMID: 24996940 DOI: 10.1007/s11356-014-3227-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 06/17/2014] [Indexed: 05/15/2023]
Abstract
Aluminium is used in diverse anthropogenic processes at the origin of pollution events in aquatic ecosystems. In the Champagne region (France), high concentrations of aluminium (Al) are detected due to vine-growing practices. In fish, little is known about the possible immune-related effects at relevant environmental concentrations. The present study analyzes the simultaneous effects of aluminium and bacterial lipopolysaccharide (LPS), alone and in combination, on toxicological biomarkers in the freshwater fish species Rutilus rutilus. For this purpose, roach treated or not with LPS were exposed to environmental concentrations of aluminium (100 μg/L) under laboratory-controlled conditions for 2, 7, 14 and 21 days. After each exposure time, we assessed hepatic lipoperoxidation, catalase activity, glutathione reductase activity and total glutathione content. We also analyzed cellular components related to the LPS-induced inflammatory response in possible target tissues, i.e. head kidney and spleen. Our results revealed a significant prooxidant effect in the liver cells and head kidney leukocytes of roach exposed to 100 μg of Al/L for 2 days. In liver, we observed more lipoperoxidation products and lower endogenous antioxidant activity levels such as glutathione reductase activity and total glutathione content. These prooxidant effects were associated with a higher oxidative burst in head kidney leukocytes, and they were all the more important in fish stimulated by LPS injection. These findings demonstrate that environmental concentrations of Al induce oxidative and immunotoxic effects in fish and are associated to an immunomodulatory process related to the inflammatory response.
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Affiliation(s)
- S Jolly
- Université de Reims Champagne-Ardenne, UMR-I02 SEBIO, BP 1039, 51687, Reims Cedex 2, France,
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Oztürk B, Ozdemir S. Effects of aluminum chloride on some trace elements and erythrocyte osmotic fragility in rats. Toxicol Ind Health 2013; 31:1069-77. [PMID: 23625912 DOI: 10.1177/0748233713486956] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Aluminum (Al) is a nonessential, toxic element to which humans are constantly exposed as a result of an increase in industrialization and improving technology practices. The aim of the study was to investigate the effects of different durations and doses of Al exposure on serum and tissue element levels and erythrocyte osmotic fragility in rats. A total of 40 male Wistar Albino rats were divided into five groups: control, group I (3 weeks, 8 mg/kg), group II (6 weeks, 8 mg/kg), group III (3 weeks, 16 mg/kg), and group IV (6 weeks, 16 mg/kg). Al chloride (AlCl3) was injected intraperitoneally (i.p.) five times a week. At the end of the experimental period, levels of Al, iron (Fe), copper (Cu), and zinc (Zn) in serum, liver, and kidney tissues were measured using inductively coupled plasma optical emission spectrometry. Osmotic fragility was determined using a spectrophotometer. The results of the experiment indicate that Al induced a statistically significant increase in Al and Fe concentrations in liver and serum as well as in Cu in the kidney. The Fe concentration in serum and kidney tissues was significantly lower in all the groups. As a result of our study, it may be concluded that tissue Al accumulation may lead to an increase in osmotic fragility of erythrocytes and abnormal trace element levels.
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Affiliation(s)
- Bahar Oztürk
- Department of Biophysics, Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Semra Ozdemir
- Department of Biophysics, Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey
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Rocha JBT, Saraiva RA, Garcia SC, Gravina FS, Nogueira CW. Aminolevulinate dehydratase (δ-ALA-D) as marker protein of intoxication with metals and other pro-oxidant situations. Toxicol Res (Camb) 2012. [DOI: 10.1039/c2tx20014g] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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In vitro and in vivo interactions of aluminum on NTPDase and AChE activities in lymphocytes of rats. Cell Immunol 2010; 265:133-8. [PMID: 20832780 DOI: 10.1016/j.cellimm.2010.08.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Revised: 08/06/2010] [Accepted: 08/09/2010] [Indexed: 12/20/2022]
Abstract
Al adjuvants are used in vaccines to increase the immune response. NTPDase and AChE play a pivotal role and act in the regulation of the immune system. The effect of Al exposure in vitro and in vivo on NTPDase and AChE activities in the lymphocytes of rats was determined. In vitro, ATP hydrolysis was decreased by 20.4% and 17.3% and ADP hydrolysis was decreased by 36.5% and 34.8%, in groups D and E, respectively, when compared to the control. AChE activity was increased by 157.3%, 152.5%, 74.7% and 90.8% in groups B, C, D, and E, respectively, when compared to the control. In vivo, ATP hydrolysis was increased by 85% and 86% and ADP hydrolysis was increased by 104.2% and 74%, in Al plus citrate and Al groups, respectively, when compared to the control. AChE activity was increased by 50.7% in Al plus citrate and by 28.6% in Al groups, when compared to the control. Our results show that Al exposure both in vitro and in vivo altered NTPDase and AChE activities in lymphocytes. These results may demonstrate the ability of Al to elicit the immune system, where NTPDase and AChE activities can act as purinergic and cholinergic markers in lymphocytes.
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Kumar V, Gill KD. Aluminium neurotoxicity: neurobehavioural and oxidative aspects. Arch Toxicol 2009; 83:965-78. [DOI: 10.1007/s00204-009-0455-6] [Citation(s) in RCA: 159] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2009] [Accepted: 06/22/2009] [Indexed: 10/20/2022]
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Nascimento PC, Del-Fabro LD, Jost CL, Bohrer D, de Carvalho LM, Rosa MB. Simultaneous determination of aluminoxamine and ferrioxamine in post-hemodialysis fluids by spectrophotometry and multivariate calibration. JOURNAL OF ANALYTICAL CHEMISTRY 2009. [DOI: 10.1134/s1061934809070041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kaizer RR, Loro VL, Schetinger MRC, Morsch VM, Tabaldi LA, Rosa CSD, Garcia LDO, Becker AG, Baldisserotto B. NTPDase and acetylcholinesterase activities in silver catfish, Rhamdia quelen (Quoy & Gaimard, 1824) (Heptapteridae) exposed to interaction of oxygen and ammonia levels. NEOTROPICAL ICHTHYOLOGY 2009. [DOI: 10.1590/s1679-62252009000400012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effects of various levels of oxygen saturation and ammonia concentration on NTPDase (ecto-nucleoside triphosphate diphosphohydrolase, E.C. 3.6.1.5) and acetylcholinesterase (AChE, E.C. 3.1.1.7) activities in whole brain of teleost fish (Rhamdia quelen) were investigated. The fish were exposed to one of two different dissolved oxygen levels, including high oxygen (6.5 mg.L-1) or low oxygen (3.5 mg.L-1), and one of two different ammonia levels, including high ammonia (0.1 mg.L-1) or low ammonia (0.03 mg.L-1) levels. The four experimental groups included the following (A) control, or high dissolved oxygen plus low NH3; (B) low dissolved oxygen plus low NH3; (C) high dissolved oxygen plus high NH3; (D) low dissolved oxygen plus high NH3. We found that enzyme activities were altered after 24 h exposure in groups C and D. ATP and ADP hydrolysis in whole brain of fish was enhanced in group D after 24 h exposure by 100% and 119%, respectively, compared to the control group. After 24 h exposure, AChE activity presented an increase of 34% and 39% in groups C and D, respectively, when compared to the control group. These results are consistent with the hypothesis that low oxygen levels increase ammonia toxicity. Moreover, the hypoxic events may increase blood flow by hypoxia increasing NTPDase activity, thus producing adenosine, a potent vasodilator.
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Bohrer D, Dessuy MB, Kaizer R, do Nascimento PC, Schetinger MRC, Morsch VM, de Carvalho LM, Garcia SC. Tissue digestion for aluminum determination in experimental animal studies. Anal Biochem 2008; 377:120-7. [DOI: 10.1016/j.ab.2008.03.029] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2007] [Revised: 03/12/2008] [Accepted: 03/16/2008] [Indexed: 11/28/2022]
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Kaizer RR, Corrêa MC, Gris LRS, da Rosa CS, Bohrer D, Morsch VM, Schetinger MRC. Effect of long-term exposure to aluminum on the acetylcholinesterase activity in the central nervous system and erythrocytes. Neurochem Res 2008; 33:2294-301. [PMID: 18470612 DOI: 10.1007/s11064-008-9725-6] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2008] [Accepted: 04/21/2008] [Indexed: 11/25/2022]
Abstract
Aluminum (Al), a neurotoxic agent, has been associated with Alzheimer's disease (AD), which is characterized by cholinergic dysfunction in the central nervous system. In this study, we evaluated the effect of long-term exposure to aluminum on acetylcholinesterase (AChE) activity in the central nervous system in different brain regions, in synaptosomes of the cerebral cortex and in erythrocytes. The animals were loaded by gavage with AlCl(3) 50 mg/kg/day, 5 days per week, totalizing 60 administrations. Rats were divided into four groups: (1) control (C); (2) 50 mg/kg of citrate solution (Ci); (3) 50 mg/kg of Al plus citrate (Al + Ci), and (4) 50 mg/kg of Al (Al). AChE activity in striatum was increased by 15% for Ci, 19% for Al + Ci and 30% for Al, when compared to control (P < 0.05). The activity in hypothalamus increased 23% for Ci, 26% for Al + Ci and 28% for Al, when compared to control (P < 0.05). AChE activity in cerebellum, hippocampus and cerebral cortex was decreased by 11%, 23% and 21% respectively, for Al, when compared to the respective controls (P < 0.05). AChE activity in synaptosomes was increased by 14% for Al, when compared to control (P < 0.05). Erythrocyte AChE activity was increased by 17% for Al + Ci and 11% for Al, when compared to control (P < 0.05). These results indicate that Al affects at the same way AChE activity in the central nervous system and erythrocyte. AChE activity in erythrocytes may be considered a marker of easy access of the central cholinergic status.
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Affiliation(s)
- R R Kaizer
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Campus Universitário, Camobi, Av. Roraima, 97105-900, Santa Maria, RS, Brazil
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Kaizer RR, Maldonado PA, Spanevello RM, Corrêa MC, Gonçalves JF, Becker LV, Morsch VM, Schetinger MRC. The effect of aluminium on NTPDase and 5'-nucleotidase activities from rat synaptosomes and platelets. Int J Dev Neurosci 2007; 25:381-6. [PMID: 17686601 DOI: 10.1016/j.ijdevneu.2007.06.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2007] [Accepted: 06/29/2007] [Indexed: 11/18/2022] Open
Abstract
Aluminium (Al), a neurotoxic compound, has been investigated in a large number of studies both in vivo and in vitro. In this study, we investigated the effect in vivo of long-term exposure to Al on NTPDase (nucleoside triphosphate diphosphohydrolase) and 5'-nucleotidase activities in the synaptosomes (obtained from the cerebral cortex and hippocampus) and platelets of rats. Here, we investigated a possible role of platelets as peripheral markers in rats. Rats were loaded by gavage with AlCl(3) 50 mg/(kg day), 5 days per week, totalizing 60 administrations. The animals were divided into four groups: (1) control (C), (2) 50 mg/kg of citrate solution (Ci), (3) 50 mg/kg of Al plus citrate (Al+Ci) solution and (4) 50 mg/kg of Al (Al). ATP hydrolysis was increased in the synaptosomes from the cerebral cortex by 42.9% for Al+Ci and 39.39% for Al, when compared to their respective control (p<0.05). ADP hydrolysis was increased by 13.15% for both Al and Al+Ci, and AMP hydrolysis increased by 32.7% for Al and 27.25% for Al+Ci (p<0.05). In hippocampal synaptosomes, the hydrolysis of ATP, ADP and AMP, was increased by 58.5%, 28.5% and 25.92%, respectively, for Al (p<0.05) and 36.7%, 22.5% and 37.64% for Al+Ci, both when compared to their respective controls. ATP, ADP and AMP hydrolysis, in platelets, was increased by 172.3%, 188.52% and 92.1%, respectively in Al+Ci, and 317.9%, 342.8% and 177.9%, respectively, for Al, when compared to their respective controls (p<0.05). Together, these results indicate that Al increases NTPDase and 5'-nucleotidase activities, in synaptosomal fractions and platelets. Thus, we suggest that platelets could be sensitive peripheral markers of Al toxicity of the central nervous system.
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Affiliation(s)
- Rosilene Rodrigues Kaizer
- Programa de Pós-Graduação em Bioquímica Toxicológica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av Roraima, 97105-900, Santa Maria, RS, Brazil
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Kaizer RR, Corrêa MC, Spanevello RM, Morsch VM, Mazzanti CM, Gonçalves JF, Schetinger MRC. Acetylcholinesterase activation and enhanced lipid peroxidation after long-term exposure to low levels of aluminum on different mouse brain regions. J Inorg Biochem 2005; 99:1865-70. [PMID: 16055195 DOI: 10.1016/j.jinorgbio.2005.06.015] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2005] [Revised: 06/09/2005] [Accepted: 06/16/2005] [Indexed: 11/23/2022]
Abstract
Aluminum (Al), oxidative stress and impaired cholinergic functions have all been related to Alzheimer's disease (AD). The present study evaluates the effect of aluminum on acetylcholinesterase (AChE) and lipid peroxidation in the mouse brain. Mice were loaded by gavage with Al 0.1 mmol/kg/day 5 days per week during 12 weeks. The mice were divided into four groups: (1) control; (2) 10 mg/mL of citrate solution; (3) 0.1 mmol/kg of Al solution; (4) 0.1 mmol/kg of Al plus 10 mg/mL of citrate solution. AChE activity was determined in the hippocampus, striatum, cortex, hypothalamus and cerebellum and lipid peroxidation was determined in the hippocampus, striatum and cortex. An increase of AChE activity was observed in the fourth group (Al + Ci) in the hippocampus (36%), striatum (54%), cortex (44%) and hypothalamus (22%) (p<0.01). The third group (Al) presented a decrease of AChE activity in the hypothalamus (20%) and an enhancement in the striatum (27%). Lipid peroxidation, measured by TBARS (thiobarbituric acid reactive substances), was elevated in the hippocampus and cerebral cortex when compared with the control (p < 0.01). The effect of aluminum on AChE activity may be due to a direct neurotoxic effect of the metal or perhaps a disarrangement of the plasmatic membrane caused by increased lipid peroxidation.
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Affiliation(s)
- Rosilene R Kaizer
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Av. Roraima, 97105-900, Santa Maria, RS, Brazil
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Missel JR, Schetinger MR, Gioda CR, Bohrer DN, Pacholski IL, Zanatta N, Martins MA, Bonacorso H, Morsch VM. Chelating effect of novel pyrimidines in a model of aluminum intoxication. J Inorg Biochem 2005; 99:1853-7. [PMID: 16098596 DOI: 10.1016/j.jinorgbio.2005.06.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2005] [Revised: 06/21/2005] [Accepted: 06/27/2005] [Indexed: 11/28/2022]
Abstract
Long time ago aluminum (Al) was considered as a non-toxic element and its use had no restrictions. However, over the last two decades, scientific publications have indicated that Al is a toxic element. In line with this, aluminum accumulation in the organism is associated with a variety of human pathologies. Efficient therapeutics approach to treat Al intoxication are still not available, but there is a consensus that chelation therapy is the procedure to be used. However, the development of new chelating agents are highly desirable to improve the efficacy of the treatment of Al intoxication. The present study evaluates the chelating effect of two novel pyrimidines: 4-tricloromethyl-1-H-pyrimidin-2-one (THP) and (4-methyl-6-trifluoromethyl-6-pyrimidin-2-il)-hydrazine (MTPH) in a mice model of aluminum intoxication and compares their efficacy with those of desferrioxamine (DFO), a classical agent used for treat Al accumulation. The animals were exposed to aluminum by gavage (0.1 mmol aluminum/kg/day) 5 days/week for 4 weeks. At the end of this period, DFO was injected i.p. and the novel pyrimidines were given by gavage at 0.2 mmol/kg/day for five consecutive days. Aluminum concentration in tissues (brain, liver, kidney and blood) was determined by graphite furnace atomic absorption spectroscopy (GFAAS). The results showed that when administered by gavage, aluminum accumulated in the brain, kidney and liver of mice. MTPH was able to decrease aluminum levels in aluminum plus citrate animal groups, whereas THP was inefficient for this purpose. However, the novel pyrimidines used in this study were unable to surpass the aluminum chelating property of DFO. Thus, new studies must be performed utilizing other chelating agents which can decrease aluminum toxicity.
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Affiliation(s)
- J R Missel
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
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17
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Farina M, Rotta LN, Soares FAA, Jardim F, Jacques R, Souza DO, Rocha JBT. Hematological changes in rats chronically exposed to oral aluminum. Toxicology 2005; 209:29-37. [PMID: 15725511 DOI: 10.1016/j.tox.2004.12.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2004] [Revised: 11/24/2004] [Accepted: 12/02/2004] [Indexed: 11/22/2022]
Abstract
This study was aimed to investigate the effects of the long-term oral exposure to aluminum sulfate on hematological parameters in rats. For this purpose, 24 adult female Wistar rats were divided in three groups with 8 animals each (control, citrate, and citrate plus aluminum groups). Rats from control and citrate groups had free access to tap water and to a sodium citrate solution (35 mM), respectively. Rats from citrate plus aluminum group received, as unique source of liquid, an aluminum sulfate solution (30 mM) diluted in the above-mentioned sodium citrate solution, ad libitum. After the treatment period (18 months), aluminum-exposed rats showed a significant decrease in the number of red blood cells, blood hemoglobin concentration and hematocrit when compared to rats from the control group. Serum iron levels were also significantly lower in citrate plus aluminum group, whereas total iron binding capacity did not change after citrate plus aluminum exposure. Erythrocyte thiobarbituric acid-reactive substances (TBARS) and nonprotein thiols (NPSH) levels, erythrocyte osmotic fragility and hepatic delta-aminolevulinic acid dehydratase (delta-ALA-D) activity did not change after treatment with citrate plus aluminum. Conversely, aluminum exposure increased delta-ALA-D activity in bone marrow. The present results indicate that long-term oral exposure to low doses of aluminum sulfate promotes alterations on erythrocyte parameters in rats, probably as a consequence of alterations in the iron status. In addition, although the details of the underlying mechanism remain unclear, our study reports, for the first time, a stimulatory effect of chronic aluminum exposure on bone marrow delta-ALA-D activity.
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Affiliation(s)
- M Farina
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil.
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18
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Aluminum: Interaction with Nucleotides and Nucleotidases and Analytical Aspects of Its Determination. STRUCTURE AND BONDING 2002. [DOI: 10.1007/3-540-45425-x_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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19
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Farina M, Lara FS, Brandão R, Jacques R, Rocha JBT. Effects of aluminum sulfate on erythropoiesis in rats. Toxicol Lett 2002; 132:131-9. [PMID: 12044547 DOI: 10.1016/s0378-4274(02)00077-2] [Citation(s) in RCA: 27] [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 aim of this study was to investigate the effects of chronically administered aluminum on erythropoiesis in rats. After treatment (i.p. injections of Al(2)(SO(4))(3), 50 micromol/kg body weight, five times a week) for 3 months, the treated (Al) group showed significantly decreased hemoglobin concentration (32%) and hematocrit (24%) compared with the control group. Serum iron decreased significantly in the Al group, whereas total iron binding capacity did not change. Treatment did not alter the activity of hepatic, renal or cerebral delta-ALA-D. Biochemical measurements related to 2-thiobarbituric acid-reactive substance (TBARS) levels from serum and hepatic, renal and cerebral homogenates also did not change after treatment. Hepatic concentrations of aluminum were higher in the Al group than in the control group. Renal and cerebral aluminum concentrations did not vary between groups. The present results indicate that exposure to aluminum sulfate promotes signs of anemia in rats as a consequence of alterations in iron status.
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Affiliation(s)
- M Farina
- Curso de Farmácia, Centro de Ciências da Saúde, Universidade Regional Integrada-Campus de Erechim, 99700-000 Erechim, RS, Brazil.
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20
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Abstract
Aluminum is the most widely distributed metal in the environment and is extensively used in modern daily life. Aluminum enters into the body from the environment and from diet and medication. However, there is no known physiological role for aluminum within the body and hence this metal may produce adverse physiological effects. The impact of aluminum on neural tissues is well reported but studies on extraneural tissues are not well summarized. In this review, the impacts of aluminum on humans and its impact on major physiological systems are summarized and discussed. The neuropathologies associated with high brain aluminum levels, including structural, biochemical, and neurobehavioral changes, have been summarized. In addition, the impact of aluminum on the musculoskeletal system, respiratory system, cardiovascular system, hepatobiliary system, endocrine system, urinary system, and reproductive system are discussed.
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Affiliation(s)
- Prasunpriya Nayak
- Department of Physiology, Sikkim Manipal Institute of Medical Sciences, 5th Mile, Tadong, Gangtok, 737102, Sikkim, India
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21
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Farina M, Folmer V, Bolzan RC, Andrade LH, Zeni G, Braga AL, Rocha JB. Selenoxides inhibit delta-aminolevulinic acid dehydratase. Toxicol Lett 2001; 119:27-37. [PMID: 11275419 DOI: 10.1016/s0378-4274(00)00296-4] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The effect of two selenides and their selenoxides on delta-aminolevulinic acid dehydratase (delta-ALA-D) from liver of adult rats was investigated. In vivo, selenides can be oxidized to selenoxides by flavin-containing monooxygenases (FMO) and selenoxides can regenerate selenides by thiol oxidation. Phenyl methyl selenide (PhSeCH3) and 1-hexynyl methyl selenide (C4H9Ctriple bondCSeCH3) were converted to selenoxides by reaction with H2O2. PhSeCH3 and C4H9Ctriple bondCSeCH3 had no effect on delta-ALA-D up to 400 microM. Conversely, their selenoxides inhibited delta-ALA-D, and the IC(50) for enzyme inhibition was about 100 and 70 microM, respectively. Partially purified delta-ALA-D (P(55)) from swine liver was also inhibited by these selenoxides. The inhibitory action of selenoxides was antagonized by dithiotreitol (DTT). Moreover, delta-ALA-D from a plant source was inhibited by the selenoxides, suggesting a possible involvement of SH groups in a distinct site of the homologous region implicated in Zn2+ binding in mammalian delta-ALA-D. After exposure to PhSeCH3 (500 micromol/kg/day) for 45 or 30 days, the activity of delta-ALA-D from liver of mice decreased to about 50% of the control group. The in vivo inhibitory action of this compound was not antagonized by DTT. PhSeCH3 and C4H9Ctriple bondCSeCH3 had no effect on the rate of DTT oxidation, but their selenoxides oxidized DTT. The results of the present study suggest that hepatic delta-ALA-D of rodents is a potential molecular target for selenides as a consequence of their metabolism to selenoxides by FMO.
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Affiliation(s)
- M Farina
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97105-900, RS, Santa Maria, Brazil
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22
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Pimentel Vieira VL, Rocha JB, Schetinger MR, Morsch VM, Rodrigues SR, Tuerlinckz SM, Bohrer D, do Nascimento PC. Effect of aluminum on delta-aminolevulinic acid dehydratase from mouse blood. Toxicol Lett 2000; 117:45-52. [PMID: 11033232 DOI: 10.1016/s0378-4274(00)00233-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The objective of this study was to investigate aluminum deposition in whole blood and plasma of mice and the activity of blood delta-aminolevulinic acid dehydratase (ALA-D) after in vitro and in vivo exposure to this element. In vitro experiments showed activation and inhibition of the enzyme activity when 0.01-5.0 mM of aluminum sulphate were used (IC(50): 1.31 mM). Treatment with citrate and aluminum plus citrate increased ALA-D activity in vivo and the increase in enzyme activity was parallel to the increase in aluminum content in blood and plasma. These results show that aluminum has a distinct effect on ALA-D activity: first, at relatively lower concentrations it activated, and at high concentration it inhibited, blood ALA-D in vitro; second, it activated the enzyme when administered to drinking water. One important toxicological finding of the present report is that the apparent irrelevant addition of citrate to the drinking water significantly increased the level of aluminum in blood and plasma. Thus, in order to predict more accurately the extent of human exposure to aluminum it would be advantageous to consider the level of citrate ingestion and not exclusively the aluminum level in water or food.
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Affiliation(s)
- V L Pimentel Vieira
- Departamento de Quimica, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97105-900, RS, Santa Maria, Brazil
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