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Yadav M, Soni R, Chauhan MK, Sandal N. Cellular and physiological approaches to evaluate the chelating effect of Chlorella on metal ion stressed lymphocytes. Biometals 2021; 34:351-363. [PMID: 33582954 DOI: 10.1007/s10534-021-00285-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 01/01/2021] [Indexed: 10/22/2022]
Abstract
Chlorella is a green alga consumed as dietary food supplement in pulverized form. In addition to its high nutritional value, it is reported as an excellent detoxifying agent. The pulverized Chlorella is partially soluble in water and insoluble portion has been reported for removal of mercury, cadmium and radioactive strontium from body. Chlorella contains a variety of metal-binding functional groups such as carboxyl, amino, phosphoryl, hydroxyl and carbonyl groups, which has high affinity towards various metal ions. The present study was envisaged to evaluate the chelating effect of water soluble fraction of Chlorella powder (AqCH) on metal ions. Fura-2 fluorescence ratio (F340/F380) was measured by fluorescence spectrometer (FS) after the exposure of chloride salt of metals viz., strontium, cobalt, barium, cesium, thallium and mercury to lymphocytes. Pretreatment of AqCH (0.1-20 mg mL-1) was given to evaluate the attenuating effect on fura-2 fluorescence ratio induced by metal ions. The intracellular levels of these metal ions were analyzed by atomic absorption spectrophotometer (AAS) and fluorescence microscopy (FM). Pretreatment with AqCH significantly attenuated the metal induced fluorescence ratio in dose-dependent manner. The results of AAS and FM were found in coherence with fura-2 fluorescence ratio which emphasized that AqCH significantly prevented the metal ions internalization. The present study suggests AqCH chelates with these metal ions and prevents its interaction with cells thereby reducing the intracellular mobilization of Ca2+.
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Affiliation(s)
- Mahendra Yadav
- Division of CBRN Defence, Institute of Nuclear Medicine and Allied Sciences (INMAS), Defence Research and Development Organization, Brig. S.K. Mazumdar Road, Timarpur, New Delhi, 110054, India
| | - Ravi Soni
- Division of Natural Radiation Response Mechanisms, Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, New Delhi, India
| | - Meenakshi Kanwar Chauhan
- Department of Pharmaceutics, Delhi Institute of Pharmaceutical Sciences and Research, New Delhi, India
| | - Nidhi Sandal
- Division of CBRN Defence, Institute of Nuclear Medicine and Allied Sciences (INMAS), Defence Research and Development Organization, Brig. S.K. Mazumdar Road, Timarpur, New Delhi, 110054, India.
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Colón-Rodríguez A, Colón-Carrión NM, Atchison WD. AMPA receptor contribution to methylmercury-mediated alteration of intracellular Ca 2+ concentration in human induced pluripotent stem cell motor neurons. Neurotoxicology 2020; 81:116-126. [PMID: 32991939 DOI: 10.1016/j.neuro.2020.09.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 09/21/2020] [Accepted: 09/22/2020] [Indexed: 12/28/2022]
Abstract
α motor neurons (MNs) are a target of the environmental neurotoxicant methylmercury (MeHg), accumulating MeHg and subsequently degenerating. In mouse spinal cord MN cultures, MeHg increased intracellular Ca2+ [Ca2+]i; the AMPA receptor (AMPAR) antagonist CNQX delayed the increase in [Ca2+]i, implicating the role of AMPARs in this response. Here we used human induced pluripotent stem cell-derived MNs (hiPSC-MNs), to characterize the role of MN AMPARs in MeHg neurotoxicity. Acute exposure to MeHg (0.1, 0.2, 0.5, 1 and 1.5 μM), fura-2 microfluorimetry, and a standard cytotoxicity assay, were used to examine MN regulation of [Ca2+]i, and cytotoxicity, respectively. Contribution of Ca2+-permeable and impermeable AMPARs was compared using either CNQX, or the Ca2+-permeable AMPAR antagonist N-acetyl spermine (NAS). MeHg-induced cytotoxicity was evaluated following a 24 h delay subsequent to 1 h exposure of hiPSC-MNs. MeHg caused a characteristic biphasic increase in [Ca2+]i, the onset of which was concentration-dependent; higher MeHg concentrations hastened onset of both phases. CNQX significantly delayed MeHg's effect on onset time of both phases. In contrast, NAS significantly delayed only the 2nd phase increase in fura-2 fluorescence. Exposure to MeHg for 1 h followed by a 24 h recovery period caused a concentration-dependent incidence of cell death. These results demonstrate for the first time that hiPSC-derived MNs are highly sensitive to effects of MeHg on [Ca2+]i, and cytotoxicity, and that both Ca2+-permeable and impermeable AMPARs contribute the elevations in [Ca2+]i.
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Affiliation(s)
- Alexandra Colón-Rodríguez
- Department of Pharmacology and Toxicology, College of Veterinary Medicine, Michigan State University, 1355 Bogue St., B338 Life Science Bldg., East Lansing, MI 48824, United States; Institute for Integrative Toxicology, College of Veterinary Medicine, Michigan State University, 1355 Bogue St., B338 Life Science Bldg., East Lansing, MI 48824, United States; Comparative Medicine and Integrative Biology Program, College of Veterinary Medicine, Michigan State University, 1355 Bogue St., B331 Life Science Bldg., East Lansing, MI 48824, United States.
| | - Nicole M Colón-Carrión
- Department of Pharmacology and Toxicology, College of Veterinary Medicine, Michigan State University, 1355 Bogue St., B338 Life Science Bldg., East Lansing, MI 48824, United States.
| | - William D Atchison
- Department of Pharmacology and Toxicology, College of Veterinary Medicine, Michigan State University, 1355 Bogue St., B338 Life Science Bldg., East Lansing, MI 48824, United States; Institute for Integrative Toxicology, College of Veterinary Medicine, Michigan State University, 1355 Bogue St., B338 Life Science Bldg., East Lansing, MI 48824, United States; Comparative Medicine and Integrative Biology Program, College of Veterinary Medicine, Michigan State University, 1355 Bogue St., B331 Life Science Bldg., East Lansing, MI 48824, United States.
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Algarve TD, Assmann CE, Cadoná FC, Machado AK, Manica-Cattani MF, Sato-Miyata Y, Asano T, Duarte MMMF, Ribeiro EE, Aigaki T, da Cruz IBM. Guarana improves behavior and inflammatory alterations triggered by methylmercury exposure: an in vivo fruit fly and in vitro neural cells study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:15069-15083. [PMID: 30915696 DOI: 10.1007/s11356-019-04881-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 03/15/2019] [Indexed: 06/09/2023]
Abstract
Methylmercury (MeHg) is a well-known environmental pollutant associated with neurological and developmental deficits in animals and humans. However, epidemiological data showed that people living in the Amazon region although exposed to MeHg do not present these effects probably due to the protective effect of certain foods. We hypothesized here if guarana, a highly caffeinated fruit and consumed on a daily basis by Amazon people, could have some protective effect against MeHg toxicity using two complementary approaches. To assess locomotor impairment and sleep disruption, we used fruit fly (Drosophila melanogaster) model, and to evaluate neuroinflammation, we used human SH-SY5Y neural cells by measuring inflammatory cytokines levels. Results showed that guarana had a protective effect on the locomotor activity of male fruit flies reducing the excessive sleepiness caused by MeHg and increasing daily activity. Also, guarana increased the viability of flies and attenuated neural cells mortality. In addition, guarana reduced all pro-inflammatory cytokines levels increased by MeHg, along with caspase-1, caspase -3, caspase-8, and 8-dOHG levels, whereas increased the anti-inflammatory (IL-10) cytokine levels, which was decreased by MeHg. Our study provides new insights on the protective effects of guarana on the viability, locomotor activity, sleep, and activity patterns in vivo and the in vitro neuronal anti-inflammatory effect against MeHg toxicity.
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Affiliation(s)
- Thaís Doeler Algarve
- Tokyo Metropolitan University, Hachioji, Tokyo, Japan
- Graduate Program in Toxicological Biochemistry, Federal University of Santa Maria, 1000 Roraima Av., Building 19, Room 3101, Santa Maria, RS, 97105900, Brazil
| | - Charles Elias Assmann
- Graduate Program in Toxicological Biochemistry, Federal University of Santa Maria, 1000 Roraima Av., Building 19, Room 3101, Santa Maria, RS, 97105900, Brazil
| | - Francine Carla Cadoná
- Graduate Program in Biosciences and Health, University of the West of Santa Catarina, Joaçaba, Brazil
| | | | | | | | - Tsunaki Asano
- Tokyo Metropolitan University, Hachioji, Tokyo, Japan
| | | | | | | | - Ivana Beatrice Mânica da Cruz
- Graduate Program in Toxicological Biochemistry, Federal University of Santa Maria, 1000 Roraima Av., Building 19, Room 3101, Santa Maria, RS, 97105900, Brazil.
- Graduate Program in Pharmacology, Federal University of Santa Maria, Santa Maria, Brazil.
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Bootman MD, Allman S, Rietdorf K, Bultynck G. Deleterious effects of calcium indicators within cells; an inconvenient truth. Cell Calcium 2018; 73:82-87. [DOI: 10.1016/j.ceca.2018.04.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 04/03/2018] [Accepted: 04/11/2018] [Indexed: 01/20/2023]
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3D-printed lab-on-valve for fluorescent determination of cadmium and lead in water. Talanta 2018; 183:201-208. [DOI: 10.1016/j.talanta.2018.02.051] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 02/09/2018] [Accepted: 02/12/2018] [Indexed: 11/23/2022]
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Koriem KMM, Arbid MS. Role of caftaric acid in lead-associated nephrotoxicity in rats via antidiuretic, antioxidant and anti-apoptotic activities. JOURNAL OF COMPLEMENTARY & INTEGRATIVE MEDICINE 2017; 15:/j/jcim.ahead-of-print/jcim-2017-0024/jcim-2017-0024.xml. [PMID: 29148979 DOI: 10.1515/jcim-2017-0024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 10/18/2017] [Indexed: 11/15/2022]
Abstract
Background Lead is a toxic metal that is widely distributed in the environment where caftaric acid (CA) is the ester form of caffeic acid where CA is the major dietary polyphenol present in various foods and beverages. The aim of this study was to evaluate the effect of CA in lead acetate (LA)-associated nephrotoxicity through antidiuretic, antioxidant and anti-apoptotic activities. Methods Forty-eight male albino rats divided into six equal groups; group 1 control injected intraperitoneally (ip) with saline (1 mL/kg of bw) over two weeks period, group 2 injected ip with CA (80 mg/kg of bw) over two weeks period, groups 3, 4, 5 and 6 injected ip with 100 μmol/kg of bw LA over two weeks period where groups 4, 5 & 6 co-injected ip with 1-deamino-8-D-arginine vasopressin (dDAVP) drug (1 mg/kg of bw), CA (40 mg/kg of bw), and CA (80 mg/kg of bw), respectively. Results The results obtained revealed that LA induced a significant decrease in kidney weight and serum sodium, potassium and chloride, but caused a significant increase in urinary volume, urinary excretion of sodium, potassium and chloride, serum urea, creatinine and uric acid. The LA also caused a significant decrease in kidney superoxide dismutase, glutathione peroxidase and induced a significant decrease in glutathione level while caused an increase in lipid peroxidation level. In addition, LA caused a decrease in p53 expression while induced an increase in bcl-2 expression in the kidney tissues. Co-injection of CA to LA-treated group restored all the above parameters to approach the normal values. The results supported with histopathological examinations. Conclusions In conclusion, the effect of CA on LA-related nephrotoxicity was occurred through antidiuretic, antioxidant, anti-apoptotic activities where the effect of CA was dose dependent.
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Affiliation(s)
- Khaled M M Koriem
- Department of Medical Physiology, Medical Research Division, National Research Centre, 33 El-Buhouth Street, P. O. Box 12622 Dokki, Cairo, Egypt
| | - Mahmoud S Arbid
- Department of Pharmacology, National Research Centre, Dokki, Cairo, Egypt
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Dao CV, Shiraishi M, Miyamoto A. The MARCKS protein amount is differently regulated by calpain during toxic effects of methylmercury between SH-SY5Y and EA.hy926 cells. J Vet Med Sci 2017; 79:1931-1938. [PMID: 29046508 PMCID: PMC5745167 DOI: 10.1292/jvms.17-0473] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Methylmercury (MeHg) is an environmental pollutant that shows severe toxicity to humans and animals. However, the molecular mechanisms mediating MeHg toxicity are not completely understood. We have previously reported that the MARCKS protein is involved in the MeHg toxicity to SH-SY5Y neuroblastoma and EA.hy926 vascular endothelial cell lines. In addition, calpain, a Ca2+-dependent protease, is suggested to be associated with the MeHg toxicity. Because MARCKS is known as a substrate of calpain, we studied the relation between calpain activation and cleavage of MARCKS and its role in MeHg toxicity. In SH-SY5Y cells, MeHg decreased cell viability along with increased calcium mobilization, calpain activation and a decrease in MARCKS amounts. However, pretreatment with calpain inhibitors attenuated the decrease in cell viability and MARCKS amount induced only by 1 µM but not by 3 µM MeHg. In cells with a MARCKS knockdown, calpain inhibitors failed to attenuate the decrease in cell viability caused by MeHg. In EA.hy926 cells, although MeHg caused calcium mobilization and a decrease in MARCKS levels, calpain activation was not observed. These results indicate that the participation of calpain in the regulation of MARCKS amounts is dependent on the cell type and concentration of MeHg. In SH-SY5Y cells, calpain-mediated proteolysis of MARCKS is involved in cytotoxicity induced by a low concentration of MeHg.
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Affiliation(s)
- Cuong Van Dao
- Department of Veterinary Pharmacology, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan.,Department of Veterinary Pharmacology, Faculty of Animal Husbandry and Veterinary Medicine, Thai Nguyen University of Agriculture and Forestry, Group 10, Quyet Thang Commune, Thai Nguyen City, Thai Nguyen, Vietnam
| | - Mitsuya Shiraishi
- Department of Veterinary Pharmacology, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan
| | - Atsushi Miyamoto
- Department of Veterinary Pharmacology, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan
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Ostrowski TD, Dantzler HA, Polo-Parada L, Kline DD. H 2O 2 augments cytosolic calcium in nucleus tractus solitarii neurons via multiple voltage-gated calcium channels. Am J Physiol Cell Physiol 2017; 312:C651-C662. [PMID: 28274920 DOI: 10.1152/ajpcell.00195.2016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 03/06/2017] [Accepted: 03/08/2017] [Indexed: 12/20/2022]
Abstract
Reactive oxygen species (ROS) play a profound role in cardiorespiratory function under normal physiological conditions and disease states. ROS can influence neuronal activity by altering various ion channels and transporters. Within the nucleus tractus solitarii (nTS), a vital brainstem area for cardiorespiratory control, hydrogen peroxide (H2O2) induces sustained hyperexcitability following an initial depression of neuronal activity. The mechanism(s) associated with the delayed hyperexcitability are unknown. Here we evaluate the effect(s) of H2O2 on cytosolic Ca2+ (via fura-2 imaging) and voltage-dependent calcium currents in dissociated rat nTS neurons. H2O2 perfusion (200 µM; 1 min) induced a delayed, slow, and moderate increase (~27%) in intracellular Ca2+ concentration ([Ca2+]i). The H2O2-mediated increase in [Ca2+]i prevailed during thapsigargin, excluding the endoplasmic reticulum as a Ca2+ source. The effect, however, was abolished by removal of extracellular Ca2+ or the addition of cadmium to the bath solution, suggesting voltage-gated Ca2+ channels (VGCCs) as targets for H2O2 modulation. Recording of the total voltage-dependent Ca2+ current confirmed H2O2 enhanced Ca2+ entry. Blocking VGCC L, N, and P/Q subtypes decreased the number of cells and their calcium currents that respond to H2O2 The number of responder cells to H2O2 also decreased in the presence of dithiothreitol, suggesting the actions of H2O2 were dependent on sulfhydryl oxidation. In summary, here, we have shown that H2O2 increases [Ca2+]i and its Ca2+ currents, which is dependent on multiple VGCCs likely by oxidation of sulfhydryl groups. These processes presumably contribute to the previously observed delayed hyperexcitability of nTS neurons in in vitro brainstem slices.
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Affiliation(s)
- Tim D Ostrowski
- Department of Physiology, Kirksville College of Osteopathic Medicine, A.T. Still University of Health Sciences, Kirksville, Missouri.,Department of Biomedical Sciences, Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri
| | - Heather A Dantzler
- Department of Biomedical Sciences, Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri
| | - Luis Polo-Parada
- Department of Medical Pharmacology and Physiology, Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri; and
| | - David D Kline
- Department of Biomedical Sciences, Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri
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