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K N, P J, Nalla SV, Dubey I, Kushwaha S. Arsenic-Induced Thyroid Hormonal Alterations and Their Putative Influence on Ovarian Follicles in Balb/c Mice. Biol Trace Elem Res 2024; 202:4087-4100. [PMID: 38093019 DOI: 10.1007/s12011-023-03988-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 11/28/2023] [Indexed: 07/18/2024]
Abstract
Thyroid issues are common among women in their reproductive years, and women with thyroid dysfunction often encounter challenges with fertility. Arsenic is known for its toxic effects on the thyroid and ovaries, investigated independently. However, there is no known study directly or indirectly addressing the association between arsenic, thyroid function, and ovarian reserve. This study aims to investigate the effect of arsenic on thyroid function and its possible implications on ovarian follicular reserve. Female Balb/c mice were given sodium arsenite (0.2 ppm, 2 ppm, and 20 ppm) via drinking water for 30 days. Findings showed that arsenic decreased thyroid hormone levels (fT3 and fT4) while increasing TSH levels, which might have led to elevated levels of FSH and LH. Furthermore, arsenic treatment not only decreased thyroid follicle sizes but also altered the ovarian follicular count. The finding demonstrates that arsenic significantly reduced the expression of LAMP1, a lysosomal marker protein. This reduction leads to increased lysosomal permeability in the thyroid, resulting in a significant release of cathepsin B. These changes led to hypothyroidism, which might indirectly affect the ovaries. Also, the elevated levels of growth differentiation factor-8 in arsenic-treated ovaries indicate impaired folliculogenesis and ovulation. Furthermore, arsenic significantly increased the expressions of pAkt and pFoxo3a, implying that arsenic accelerated the activation of the primordial follicular pools. In conclusion, arsenic disrupts lysosomal stabilization, potentially leading to a decline in circulating fT3 and fT4 levels. This disturbance could, in turn, affect the estrous cycle and may alter the pattern of follicular development.
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Affiliation(s)
- Nandheeswari K
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Raebareli (NIPER-R), Bijnor-Sisendi Road, Sarojini Nagar, Near CRPF Base Camp, Lucknow, Uttar Pradesh, 226002, India
| | - Jayapradha P
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Raebareli (NIPER-R), Bijnor-Sisendi Road, Sarojini Nagar, Near CRPF Base Camp, Lucknow, Uttar Pradesh, 226002, India
| | - Sree Vaishnavi Nalla
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Raebareli (NIPER-R), Bijnor-Sisendi Road, Sarojini Nagar, Near CRPF Base Camp, Lucknow, Uttar Pradesh, 226002, India
| | - Itishree Dubey
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Raebareli (NIPER-R), Bijnor-Sisendi Road, Sarojini Nagar, Near CRPF Base Camp, Lucknow, Uttar Pradesh, 226002, India
| | - Sapana Kushwaha
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Raebareli (NIPER-R), Bijnor-Sisendi Road, Sarojini Nagar, Near CRPF Base Camp, Lucknow, Uttar Pradesh, 226002, India.
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2
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Ali M, Hussain H, Hussain A, Rauf A, Hussain W, Ullah M, Abbas S, Al-Awthan YS, Bahattab O, Khan M, Olatunde A, Almarhoon ZM, Mabkhot YN, Alshehri MM, Daştan SD, Ramadan MF, Sharifi-Rad J. Hepatoprotective Screening of Seriphidium kurramense (Qazilb.) Y.R. Ling. BIOMED RESEARCH INTERNATIONAL 2021; 2021:9026731. [PMID: 34912897 PMCID: PMC8668277 DOI: 10.1155/2021/9026731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 11/09/2021] [Indexed: 11/17/2022]
Abstract
Investigation on medicinal plants' therapeutic potential has gained substantial importance in the discovery of novel effective and safe therapeutic agents. The present study is aimed at investigating the hepatoprotective potential of Seriphidium kurramense methanolic extract (SKM) against carbon tetrachloride- (CCl4-) induced hepatotoxicity in rats. S. kurramense is one of the most imperative plants for its various pharmacological activities. Therefore, this study was aimed at evaluating the hepatoprotective potential against CCl4-induced liver toxicity. The serum samples were analyzed for alanine aminotransferase (ALT) and aspartate aminotransferase (AST) together with the oxidative stress mediator levels as nitric oxide (NO), malondialdehyde (MDA), glutathione (GSH), reduced glutathione (GSH), and superoxide dismutase (SOD) as well as peroxidation and H2O2 activity. CCl4 administration resulted in an elevated free radical generation, altered liver marker (AST and ALT) enzymes, reduced antioxidant enzyme, and increased DNA damage. Methanolic extract of S. kurramense decreased CCl4-induced hepatotoxicity by increasing the antioxidant status and reducing H2O2 and nitrate content generation as well as reducing DNA damage. Additionally, SKM reversed the morphological alterations induced by CCl4 in the SKM-treated groups. These results demonstrated that SKM displayed hepatoprotective activity against CCl4-induced hepatic damage in experimental rats.
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Affiliation(s)
- Maroof Ali
- College of Life Science, Anhui Normal University, Wuhu 241000, China
| | - Hidayat Hussain
- Leibniz Institute of Plant Biochemistry, Department of Bioorganic Chemistry, D-06120 Halle (Saale), Germany
| | - Amjad Hussain
- Department of Chemistry, University of Okara, Okara, Pakistan
| | - Abdur Rauf
- Department of Chemistry, University of Swabi, Anbar KPK, Pakistan
| | - Wahid Hussain
- Department of Botany, Government Post Graduate College Parachinar, Kurram 26000, Pakistan
| | - Manzoor Ullah
- Department of Botany, University of Science & Technology Bannu, Pakistan
| | - Safdar Abbas
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Yahya S. Al-Awthan
- Department of Biology, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia
- Department of Biology, Faculty of Science, Ibb University, Ibb, Yemen
| | - Omar Bahattab
- Department of Biology, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia
| | - Muhammad Khan
- Department of Chemistry, University of Okara, Okara, Pakistan
| | - Ahmed Olatunde
- Department of Biochemistry, Abubakar Tafawa Balewa University, Bauchi 740272, Nigeria
| | - Zainab M. Almarhoon
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Yahia N. Mabkhot
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Khalid University, Abha, Saudi Arabia
| | - Mohammed M. Alshehri
- Department of Pharmaceutical Care, Ministry of National Guard-Health Affairs, Riyadh, Saudi Arabia
| | - Sevgi Durna Daştan
- Department of Biology, Faculty of Science, Sivas Cumhuriyet University, 58140 Sivas, Turkey
- Beekeeping Development Application and Research Center, Sivas Cumhuriyet University, 58140 Sivas, Turkey
| | - Mohamed Fawzy Ramadan
- Deanship of Scientific Research, Umm Al-Qura University, Makkah, Saudi Arabia
- Department of Agricultural Biochemistry, Faculty of Agriculture, Zagazig University, Zagazig 44519, Egypt
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3
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Rahaman MS, Yamasaki S, Binte Hossain KF, Hosokawa T, Saito T, Kurasaki M. Effects of curcumin, D-pinitol alone or in combination in cytotoxicity induced by arsenic in PC12 cells. Food Chem Toxicol 2020; 144:111577. [DOI: 10.1016/j.fct.2020.111577] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 06/12/2020] [Accepted: 07/01/2020] [Indexed: 12/16/2022]
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Rahaman MS, Banik S, Akter M, Rahman MM, Sikder MT, Hosokawa T, Saito T, Kurasaki M. Curcumin alleviates arsenic-induced toxicity in PC12 cells via modulating autophagy/apoptosis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 200:110756. [PMID: 32464442 DOI: 10.1016/j.ecoenv.2020.110756] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/08/2020] [Accepted: 05/09/2020] [Indexed: 06/11/2023]
Abstract
Arsenic is a recognized highly toxic contaminant, responsible for numerous human diseases and affecting many millions of people in different parts of the world. Contrarily, curcumin is a natural dietary polyphenolic compound and the main active ingredient in turmeric. Recently it has drawn great attention due to its diverse biological activities, strong antioxidant properties and therapeutic potential against many human ailments. In this study, we aimed to explore the protective effects and the regulatory role of curcumin on arsenic-induced toxicity and gain insights into biomolecular mechanism/s. Arsenic (10 μM) treatment in PC12 cells for 24 h induced cytotoxicity by decreasing cell viability and intracellular glutathione level and increasing lactate dehydrogenase activity and DNA fragmentation. In addition, arsenic caused apoptotic cell death in PC12 cells, which were confirmed from flow cytometry results. Moreover, arsenic (10 μM) treatment significantly down-regulated the inhibition factors of autophagy/apoptosis; mTOR, Akt, Nrf2, ERK1, Bcl-x, Xiap protein expressions, up-regulated the enhanced factors of autophagy/apoptosis; ULK, LC3, p53, Bax, cytochrome c, caspase 9, cleaved caspase 3 proteins and eventually caused autophagic and apoptotic cell death. However, curcumin (2.5 μM) pretreatment with arsenic (10 μM) effectively saves PC12 cells against arsenic-induced cytotoxicity through increasing cell viability, intracellular GSH level and boosting the antioxidant defense system, and limiting the LDH activity and DNA damage. Furthermore, pretreatment of curcumin with arsenic expressively alleviated arsenic-induced toxicity and cell death by reversing the expressions of proteins; mTOR, Akt, Nrf2, ERK1, Bcl-x, Xiap, ULK, LC3, p53, Bax, cytochrome c, caspase 9 and cleaved caspase 3. Our findings indicated that curcumin showed antioxidant properties through the Nrf2 antioxidant signaling pathway and alleviates arsenic-triggered toxicity in PC12 cells by regulating autophagy/apoptosis.
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Affiliation(s)
- Md Shiblur Rahaman
- Graduate School of Environmental Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Subrata Banik
- Graduate School of Environmental Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Mahmuda Akter
- Graduate School of Environmental Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Md Mostafizur Rahman
- Department of Environmental Sciences, Jahangirnagar University, Dhaka, 1342, Bangladesh
| | - Md Tajuddin Sikder
- Department of Public Health and Informatics, Jahangirnagar University, Dhaka, 1342, Bangladesh
| | - Toshiyuki Hosokawa
- Institute for the Advancement of Higher Education, Hokkaido University, Sapporo, 060-0817, Japan
| | - Takeshi Saito
- Faculty of Health Sciences, Hokkaido University, Sapporo, 060-0808, Japan
| | - Masaaki Kurasaki
- Graduate School of Environmental Science, Hokkaido University, Sapporo, 060-0810, Japan; Faculty of Environmental Earth Science, Hokkaido University, Sapporo, 060-0810, Japan.
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Ince S, Kucukkurt I, Acaroz U, Arslan-Acaroz D, Varol N. Boron ameliorates arsenic-induced DNA damage, proinflammatory cytokine gene expressions, oxidant/antioxidant status, and biochemical parameters in rats. J Biochem Mol Toxicol 2018; 33:e22252. [PMID: 30368975 DOI: 10.1002/jbt.22252] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 09/24/2018] [Accepted: 10/01/2018] [Indexed: 01/27/2023]
Abstract
Arsenic, an element found in nature, causes hazardous effects on living organisms. Meanwhile, natural compounds exhibit protective effects against hazardous substances. This study evaluated the effects of boron against arsenic-induced genotoxicity and altered biochemical parameters in rats. Thirty-five male Wistar albino rats were equally divided into five groups, and the experimental period lasted 30 days. One group was used as the control, and another group was treated with 100 mg/L arsenic in drinking water. The other groups were orally treated with 5, 10, and 20 mg/kg boron plus arsenic (100 mg/L via drinking water). Arsenic caused changes in biochemical parameters, total oxidant/antioxidant status, and DNA damage in mononuclear leukocytes. Moreover, it increased IFN-γ, IL-1β, TNF-α, and NFκB mRNA expression levels in rat tissue. However, boron treatment improved arsenic-induced alterations in biochemical parameters and increases in DNA damage and proinflammatory cytokine gene expressions.
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Affiliation(s)
- Sinan Ince
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Ismail Kucukkurt
- Department of Biochemistry, Faculty of Veterinary Medicine, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Ulas Acaroz
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Damla Arslan-Acaroz
- Department of Laboratory and Veterinary Health, Bayat Vocational School, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Nuray Varol
- Department of Medical Genetics, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
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Zubair M, Martyniuk CJ. A review on hemato-biochemical, accumulation and patho-morphological responses of arsenic toxicity in ruminants. TOXIN REV 2018. [DOI: 10.1080/15569543.2018.1442347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Muhammad Zubair
- Faculty of Veterinary Sciences, University of Poonch, Rawalakot Azad Kashmir, Pakistan
| | - Christopher Joseph Martyniuk
- Center for Environmental and Human Toxicology & Department of Physiological Sciences, University of Florida, Gainesville, FL, USA
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Ronci L, De Matthaeis E, Chimenti C, Davolos D. Arsenic-contaminated freshwater: assessing arsenate and arsenite toxicity and low-dose genotoxicity in Gammarus elvirae (Crustacea; Amphipoda). ECOTOXICOLOGY (LONDON, ENGLAND) 2017; 26:581-588. [PMID: 28332024 DOI: 10.1007/s10646-017-1791-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/04/2017] [Indexed: 06/06/2023]
Abstract
Arsenic (As) contamination of freshwater is largely due to geogenic processes, but As is also released into the environment because of improper anthropic activities. The European regulatory limits in drinking water are of 10 μg L-1 As. However, knowledge of the genotoxic effects induced by low doses of As in freshwater environments is still scanty. This study was designed to investigate arsenate (As(V)) and arsenite (As(III)) toxicity and low-dose genotoxicity in Gammarus elvirae, which has proved to be a useful organism for genotoxicity assays in freshwater. As(V) and As(III) toxicity was assessed on the basis of the median lethal concentration, LC(50), while estimates of DNA damage were based on the Comet assay. The G. elvirae LC (50-240 h) value we calculated was 1.55 mg L-1 for As(V) and 1.72 mg L-1 for As(III). Arsenic exposure (240 h) at 5, 10, and 50 µg L-1 of As in assays with either arsenate or arsenite-induced DNA damage in hemocytes of G. elvirae in a concentration-dependent manner. Our study provides a basis for future genotoxic research on exposure to freshwater that contains low levels of arsenic.
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Affiliation(s)
- Lucilla Ronci
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Viale dell'Università 32, Rome, Italy
| | - Elvira De Matthaeis
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Viale dell'Università 32, Rome, Italy
| | - Claudio Chimenti
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Viale dell'Università 32, Rome, Italy
| | - Domenico Davolos
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Viale dell'Università 32, Rome, Italy.
- Department of Technological Innovations and Safety of Plants, Products and Anthropic Settlements, INAIL, Research Area, Via R. Ferruzzi 38/40, Rome, Italy.
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8
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Evaluation of sodium arsenite exposure on reproductive competence in pregnant and postlactational dams and their offspring. Reprod Toxicol 2017; 69:1-12. [DOI: 10.1016/j.reprotox.2017.01.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 12/07/2016] [Accepted: 01/04/2017] [Indexed: 11/18/2022]
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9
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Jahan S, Rehman S, Ullah H, Munawar A, Ain QU, Iqbal T. Ameliorative effect of quercetin against arsenic-induced sperm DNA damage and daily sperm production in adult male rats. Drug Chem Toxicol 2015; 39:290-6. [PMID: 26524343 DOI: 10.3109/01480545.2015.1101772] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In this study, the protective effect of quercetin was evaluated against arsenic induced reproductive ailments in male rats. For this purpose, male rats (n = 5/group) weighing 180-250 g were used. First group served as control, second group received arsenic (50 ppm) in drinking water. Third group was treated with quercetin (50 mg/kg) alone, while fourth group received arsenic + quercetin. All treatments were carried out for 49 days. After treatment, animals were killed by decapitation; testis and epididymis were dissected out. Right epididymis was minced immediately for comet assay, while left epididymis was processed for histology. Similarly, right testis was homogenized for estimation of daily sperm production (DSP) and detection of metal concentration. The results of our research revealed that arsenic treatment did not cause any significant change in body weight and testicular volume. Quercetin treatment significantly prevented tissue deposition of arsenic within the testis. Arsenic treatment caused a significant reduction in DSP, however, in the arsenic + quercetin-treated group and quercetin alone-treated group, DSP was significantly high as compared to the arsenic-treated group. Histological study of epididymis showed empty lumen in arsenic-treated group while in arsenic + quercetin-treated group and quercetin alone-treated group, lumen were filled with sperm and were comparable to control. Sperm DNA damage, induced by arsenic, was significantly reversed toward control levels by supplementation of quercetin. These results suggest that quercetin not only prevents deposition of arsenic in tissues, but can also protect the sperm DNA damage.
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Affiliation(s)
- Sarwat Jahan
- a Reproductive Physiology Lab, Department of Animal Sciences, Quaid-i-Azam University , Islamabad , Pakistan
| | - Saima Rehman
- a Reproductive Physiology Lab, Department of Animal Sciences, Quaid-i-Azam University , Islamabad , Pakistan
| | - Hizb Ullah
- a Reproductive Physiology Lab, Department of Animal Sciences, Quaid-i-Azam University , Islamabad , Pakistan
| | - Asma Munawar
- a Reproductive Physiology Lab, Department of Animal Sciences, Quaid-i-Azam University , Islamabad , Pakistan
| | - Qurat Ul Ain
- a Reproductive Physiology Lab, Department of Animal Sciences, Quaid-i-Azam University , Islamabad , Pakistan
| | - Tariq Iqbal
- a Reproductive Physiology Lab, Department of Animal Sciences, Quaid-i-Azam University , Islamabad , Pakistan
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Singha U, Pandey N, Boro F, Giri S, Giri A, Biswas S. Sodium arsenite induced changes in survival, growth, metamorphosis and genotoxicity in the Indian cricket frog (Rana limnocharis). CHEMOSPHERE 2014; 112:333-339. [PMID: 25048924 DOI: 10.1016/j.chemosphere.2014.04.076] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2013] [Revised: 03/23/2014] [Accepted: 04/19/2014] [Indexed: 06/03/2023]
Abstract
Arsenic contamination of the environment is a matter of great concern. Understanding the effects of arsenic on aquatic life will act as biological early warning system to assess how arsenic could shape the biodiversity in the affected areas. Rapid decline in amphibian population in recent decades is a cause of major concern. Over the years, amphibians have been recognized as excellent bio-indicators of environmental related stress. In the present study, we examined the toxic and genotoxic effects of sodium arsenite in the tadpoles of the Indian cricket frog (Rana limnocharis). Sodium arsenite at different concentrations (0, 50, 100, 200 and 400 μg L(-1)) neither induced lethality nor significantly altered body weight at metamorphosis. However, it accelerated the rate of metamorphosis at higher concentrations, reduced body size (snout-vent length) and induced developmental deformities such as loss of limbs. Besides, at concentration ranges between 100 and 400 μg L(-1), sodium arsenite induced statistically significant genotoxicity at 24, 48, 72 and 96 h of the exposure in a concentration-dependent manner. However, it did not show time effects as the highest frequency was found between 48 and 72 h which remained steady subsequently. The genotoxicity was confirmed by comet assay in the whole blood cells. These findings suggest that arsenic at environmentally relevant concentrations has significant sub-lethal effects on R.limnocharis, which may have long-term fitness consequence to the species and may have similar implications in other aquatic life too.
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Affiliation(s)
- Utsab Singha
- Environmental Toxicology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar 788 011, India
| | - Neelam Pandey
- Molecular Cytogenetics Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar 788 011, India
| | - Freeman Boro
- Environmental Toxicology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar 788 011, India
| | - Sarbani Giri
- Molecular Cytogenetics Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar 788 011, India
| | - Anirudha Giri
- Environmental Toxicology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar 788 011, India.
| | - Somava Biswas
- Molecular Cytogenetics Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar 788 011, India
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Dezfouli MGZ, Eissazadeh S, Zade SMAS. Histological and histometrical study of the protective role of α-tocopherol against sodium arsenite toxicity in rat ovaries. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2014; 20:1167-1179. [PMID: 24735566 DOI: 10.1017/s1431927614000701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This study examines histometrical changes induced by sodium arsenite (SA), as an environmental pollutant, and investigates the protective effect of α-tocopherol on ovaries of SA-treated rats during the prenatal stage until sexual maturity. Rats were classified into groups: control, SA (8 ppm/day), α-tocopherol (100 ppm/day), and SA+α-tocopherol. Treatment was performed from pregnancy until maturation when the rats and ovaries were weighed. The Cavalieri method was used to estimate volume of the ovaries, cortex, medulla, and corpus luteum. The mean diameter of oocytes, granulosa cells, and nuclei were measured and volume was estimated using the Nucleator method. The number of oocytes and thickness of the zona pellucida (ZP) were determined using an optical dissector and orthogonal intercept method, respectively. SA reduced the body and ovary weight, the number of secondary, antral and Graafian oocytes, volume of the ovaries, cortex, medulla and corpus luteum, mean diameter and volume of oocytes in primordial and primary follicles, mean diameter and volume of oocyte nuclei in all types of follicles, and mean thickness of the ZP in secondary and antral follicles. Also, the mean diameter and volume of granulosa cells and their nuclei in antral and Graafian follicles decreased significantly. Vacuolization and vascular congestion in the corpus luteum and an increase in the number of atretic oocytes were seen in the SA group. Most of these parameters were unchanged from the control level in the SA+α-tocopherol group. It was concluded that α-tocopherol supplementation reduced the toxic effects of SA exposure on ovarian tissue in rats.
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Affiliation(s)
- Maryam Ghandi Zadeh Dezfouli
- 1Department of Biology, Faculty of Basic Science,Arak University,Shahid Beheshti Street,Arak,Markazi Province,3945-5-38138Iran
| | - Samira Eissazadeh
- 2Department of Cellular and Molecular Biology, Faculty of Biotechnology and Biomolecular Science,Serding,Selangor,Darul Ehsan,43400Malaysia
| | - Sayed Mohammad Ali Shariat Zade
- 1Department of Biology, Faculty of Basic Science,Arak University,Shahid Beheshti Street,Arak,Markazi Province,3945-5-38138Iran
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12
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Bustaffa E, Stoccoro A, Bianchi F, Migliore L. Genotoxic and epigenetic mechanisms in arsenic carcinogenicity. Arch Toxicol 2014; 88:1043-67. [PMID: 24691704 DOI: 10.1007/s00204-014-1233-7] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 03/18/2014] [Indexed: 02/06/2023]
Abstract
Arsenic is a human carcinogen with weak mutagenic properties that induces tumors through mechanisms not yet completely understood. People worldwide are exposed to arsenic-contaminated drinking water, and epidemiological studies showed a high percentage of lung, bladder, liver, and kidney cancer in these populations. Several mechanisms by which arsenical compounds induce tumorigenesis were proposed including genotoxic damage and chromosomal abnormalities. Over the past decade, a growing body of evidence indicated that epigenetic modifications have a role in arsenic-inducing adverse effects on human health. The main epigenetic mechanisms are DNA methylation in gene promoter regions that regulate gene expression, histone tail modifications that regulate the accessibility of transcriptional machinery to genes, and microRNA activity (noncoding RNA able to modulate mRNA translation). The "double capacity" of arsenic to induce mutations and epimutations could be the main cause of arsenic-induced carcinogenesis. The aim of this review is to better clarify the mechanisms of the initiation and/or the promotion of arsenic-induced carcinogenesis in order to understand the best way to perform an early diagnosis and a prompt prevention that is the key point for protecting arsenic-exposed population. Studies on arsenic-exposed population should be designed in order to examine more comprehensively the presence and consequences of these genetic/epigenetic alterations.
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Affiliation(s)
- Elisa Bustaffa
- Unit of Environmental Epidemiology and Diseases Registries, Institute of Clinical Physiology, National Council of Research, Via Moruzzi 1, 56123, Pisa, Italy
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