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El-Said GF, El Zokm GM, El-Sayed AAM, Soliman NF. Comprehensive risk assessment and interactions of fluoride and boron ions in the water-sediments interface: The Red Sea, Egypt. CHEMOSPHERE 2024; 359:142334. [PMID: 38759811 DOI: 10.1016/j.chemosphere.2024.142334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 04/15/2024] [Accepted: 05/12/2024] [Indexed: 05/19/2024]
Abstract
This study presents a baseline evaluation of the distribution, human and ecotoxicological risk, and the potential interactions of fluoride and boron in the water-sediment interface in 25 locations from incredible Red Sea tourist destinations. Results showed comparable levels of B and F in the water and sediments with previous literature. Significant positive correlation was found between B and F (r = 0.57; P<0.01). Based on the sediment/liquid partition coefficient (Kd), F is more likely to be released from the sediment into seawater (logKd< 3) than B (3< logKd< 4). pH and alkalinity may affect water-sediment interactions of B and F, respectively, while SO42- and Cl- ions had no significant effect on adsorption ability of F and B. The majority of minerals had average saturation Index (SI) > 1 referring to the over saturation of seawater with these minerals and their inability to dissolve. The formation of CF, FAP, and CFAP may be related to the high correlation between Fw (r = 0.928, P< 0.01; r = 0.527, P< 0.01; r = 0.608, P< 0.01) and Bw (r = 0.38, P< 0.05; r = 0.38, P< 0.05; r = 0.397, P< 0.05). Total hazard quotient (THQ) for children and adults were <1, revealing no health risks from exposure to B and F through ingestion and skin contact while swimming. The risk characterization ratio; RCRmix(MEC/PNEC) showed high short-term risks to aquatic organisms. Further investigations might emphasis on emerging mitigation strategies to address these concerns.
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Affiliation(s)
- Ghada F El-Said
- National Institute of Oceanography and Fisheries, NIOF, Egypt
| | - Gehan M El Zokm
- National Institute of Oceanography and Fisheries, NIOF, Egypt
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2
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Otero MA, Grenat PR, Pollo FE, Baraquet M, Martino AL. Effect on growth and development of common toad (Rhinella arenarum) tadpoles in environment related to fluorite mine. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166936. [PMID: 37690762 DOI: 10.1016/j.scitotenv.2023.166936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/23/2023] [Accepted: 09/07/2023] [Indexed: 09/12/2023]
Abstract
Fluorite mining activities have been scarcely evaluated so far and the potential effect of this activity on larval stages is poorly known. Thus, studies addressing the effect of contaminants present in water bodies on the health of amphibian larvae are crucial information for their conservation and constitute a warning sign of environmental modification. This study aims to evaluate the effects of natural and artificial surface waters associated with a fluorite mine on the early life stages of Rhinella arenarum. Using microcosms, we assessed four sites with different degrees of disturbance by the fluorine mine: Vallecitos stream (undisturbed); Cerros Negros upstream of mining camp (low disturbance); Cerros Negro downstream of mining camp (medium disturbance); Decantation Ponds (high disturbance). For 65 days we measured different endpoints at different periods of tadpole development. The highest mortality of tadpoles was observed in the Decantation Ponds. In the same way, larval body condition was lower at Decantation Ponds throughout the study, due mainly to the lower weight. A significant decrease in growth and development was observed in Cerros Negro downstream of the mining camp and Decantation Ponds. No significant differences in growth, development and mortality were observed for the other two sites. At the metamorphic climax we observe a lower body condition and a reduced recruitment of individuals in Decantation Ponds. This study allowed us to assess the effect on larvae of R. arenarum of fluorite mining wastewater compared with other near-natural sites. Given the potentially negative synergic effects of mixed water pollutants on tadpoles, this study suggests that chronic exposure to fluorite mining water may significantly impact the adult amphibian population structure, thus altering population viability. Therefore, we propose to monitor the correct functioning of the mine and especially of Decantation Ponds to avoid discharges into the natural streams.
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Affiliation(s)
- Manuel A Otero
- Instituto de Ciencias de La Tierra, Biodiversidad y Ambiente (ICBIA), UNRC-CONICET, Argentina; Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional N 36 e Km 601, CP 5800 Río Cuarto, Argentina.
| | - Pablo R Grenat
- Instituto de Ciencias de La Tierra, Biodiversidad y Ambiente (ICBIA), UNRC-CONICET, Argentina; Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional N 36 e Km 601, CP 5800 Río Cuarto, Argentina
| | - Favio E Pollo
- Instituto de Ciencias de La Tierra, Biodiversidad y Ambiente (ICBIA), UNRC-CONICET, Argentina; Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional N 36 e Km 601, CP 5800 Río Cuarto, Argentina
| | - Mariana Baraquet
- Instituto de Ciencias de La Tierra, Biodiversidad y Ambiente (ICBIA), UNRC-CONICET, Argentina; Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional N 36 e Km 601, CP 5800 Río Cuarto, Argentina
| | - Adolfo L Martino
- Instituto de Ciencias de La Tierra, Biodiversidad y Ambiente (ICBIA), UNRC-CONICET, Argentina; Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional N 36 e Km 601, CP 5800 Río Cuarto, Argentina
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3
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Karaman M, Toraman E, Sulukan E, Baran A, Bolat İ, Yıldırım S, Kankaynar M, Ghosigharehagaji A, Budak H, Ceyhun SB. Fluoride exposure causes behavioral, molecular and physiological changes in adult zebrafish (Danio rerio) and their offspring. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 97:104044. [PMID: 36566951 DOI: 10.1016/j.etap.2022.104044] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/13/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
Fluoride exposure through drinking water, foods, cosmetics, and drugs causes genotoxic effects, oxidative damage, and impaired cognitive abilities. In our study, the effects of fluoride on anxiety caused by the circadian clock and circadian clock changes in a zebrafish model were investigated at the molecular level on parents and the next generations. For this purpose, adult zebrafish were exposed to 1.5 ppm, 5 ppm, and 100 ppm fluoride for 6 weeks. At the end of exposure, anxiety-like behaviors and sleep/wake behaviors of the parent fish were evaluated with the circadian rhythm test and the novel tank test. In addition, antioxidant enzyme activities and melatonin levels in brain tissues were measured. In addition, morphological, physiological, molecular and behavioral analyzes of offspring taken from zebrafish exposed to fluoride were performed. In addition, histopathological analyzes were made in the brain tissues of both adult zebrafish and offspring, and the damage caused by fluoride was determined. The levels of BMAL1, CLOCK, PER2, GNAT2, BDNF and CRH proteins were measured by immunohistochemical analysis and significant changes in their levels were determined in the F- treated groups. The data obtained as a result of behavioral and molecular analyzes showed that parental fluoride exposure disrupts the circadian rhythm, causes anxiety-like behaviors, and decreases the levels of brain antioxidant enzymes and melatonin in parents. In addition, delay in hatching, increase in death and body malformations, and decrease in blood flow velocity, and locomotor activity was observed in parallel with dose increase in offspring. On the other hand, an increase in offspring apoptosis rate, ROS level, and lipid accumulation was detected. As a result, negative effects of fluoride exposure on both parents and next generations have been identified.
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Affiliation(s)
- Melike Karaman
- Department of Molecular Biology and Genetics, Faculty of Science, Atatürk University, Erzurum, Turkey; Department of Molecular Biology and Genetics, Graduate School of Natural and Applied Science, Atatürk University, Erzurum, Turkey
| | - Emine Toraman
- Department of Molecular Biology and Genetics, Faculty of Science, Atatürk University, Erzurum, Turkey; Department of Molecular Biology and Genetics, Graduate School of Natural and Applied Science, Atatürk University, Erzurum, Turkey
| | - Ekrem Sulukan
- Aquatic Biotechnology Laboratory, Fisheries Faculty, Atatürk University, Erzurum, Turkey; Aquaculture Department, Fisheries Faculty, Atatürk University, Erzurum, Turkey; Department of Aquaculture Engineering, Graduate School of Natural and Applied Science, Atatürk University, Erzurum, Turkey
| | - Alper Baran
- Aquatic Biotechnology Laboratory, Fisheries Faculty, Atatürk University, Erzurum, Turkey; Department of Food Quality Control and Analysis, Technical Vocational School, Atatürk University, Erzurum, Turkey
| | - İsmail Bolat
- Department of Pathology, Faculty of Veterinary, Atatürk University, Erzurum, Turkey
| | - Serkan Yıldırım
- Department of Pathology, Faculty of Veterinary, Atatürk University, Erzurum, Turkey
| | - Meryem Kankaynar
- Aquatic Biotechnology Laboratory, Fisheries Faculty, Atatürk University, Erzurum, Turkey; Department of Nanoscience and Nanoengineering, Graduate School of Natural and Applied Science, Atatürk University, Erzurum, Turkey
| | - Atena Ghosigharehagaji
- Aquatic Biotechnology Laboratory, Fisheries Faculty, Atatürk University, Erzurum, Turkey
| | - Harun Budak
- Department of Molecular Biology and Genetics, Faculty of Science, Atatürk University, Erzurum, Turkey; Department of Molecular Biology and Genetics, Graduate School of Natural and Applied Science, Atatürk University, Erzurum, Turkey
| | - Saltuk Buğrahan Ceyhun
- Aquatic Biotechnology Laboratory, Fisheries Faculty, Atatürk University, Erzurum, Turkey; Aquaculture Department, Fisheries Faculty, Atatürk University, Erzurum, Turkey; Department of Aquaculture Engineering, Graduate School of Natural and Applied Science, Atatürk University, Erzurum, Turkey; Department of Nanoscience and Nanoengineering, Graduate School of Natural and Applied Science, Atatürk University, Erzurum, Turkey.
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Zhang X, Wang G, Wang T, Chen J, Feng C, Yun S, Cheng Y, Cheng F, Cao J. Selenomethionine alleviated fluoride-induced toxicity in zebrafish (Danio rerio) embryos by restoring oxidative balance and rebuilding inflammation homeostasis. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2022; 242:106019. [PMID: 34788727 DOI: 10.1016/j.aquatox.2021.106019] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/03/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
Fish are target organisms that are extremely susceptible to fluoride pollution, and an increase in fluoride load will damage multiple systems of fish. Selenomethionine (Se-Met) at low levels has been reported to alleviate oxidative damage and inflammation caused by toxic substances, but whether it can alleviate fluoride-induced toxicity in zebrafish embryos has not been elucidated. In this study, the intervention effects of Se-Met on developmental toxicity, oxidative stress and inflammation in zebrafish embryos exposed to fluoride were determined. Our results showed that fluoride accumulated in larvae and induced developmental toxicity in zebrafish embryos, caused oxidative damage and apoptosis, increased significantly the MPO and LZM activities and the levels of the inflammation-related genes IL-1β, IL-6, TNF-α, IL-10 and TGF-β. Moreover, fluoride significantly increased the levels of ERK2, JNK, p38 and p65 in MAPKs and NF-κB pathways. Se-Met-treatment alleviated the adverse effects induced by fluoride, and all of the above indicators induced by fluoride returned to near control levels with increasing concentrations and time. However, treatment with Se-Met-alone also markedly increased the levels of IL-6, TNF-α, IL-10, TGF-β, ERK2 and JNK. In short, these data demonstrated that Se-Met-could alleviate fluoride-induced toxicity in zebrafish embryos by restoring oxidative balance and rebuilding inflammation homeostasis, although low levels of Se-Met-alone had certain toxic effects on zebrafish embryos. Taken together, Se-Met-plays an important role in preventing toxic damage induced by fluoride in zebrafish embryos, although it has certain toxic effects.
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Affiliation(s)
- Xiulin Zhang
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Guodong Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China; School of Biology and Food Engineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Tianyu Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Jianjie Chen
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Cuiping Feng
- College of Food Science and Technology, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Shaojun Yun
- College of Food Science and Technology, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Yanfen Cheng
- College of Food Science and Technology, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Feier Cheng
- College of Food Science and Technology, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Jinling Cao
- College of Food Science and Technology, Shanxi Agricultural University, Taigu, Shanxi 030801, China.
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de Gregorio LS, Franco-Belussi L, Goldberg J, De Oliveira C. Nonylphenol and cyproterone acetate effects in the liver and gonads of Lithobates catesbeianus (Anura) tadpoles and juveniles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:62593-62604. [PMID: 34196865 DOI: 10.1007/s11356-021-14599-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 05/24/2021] [Indexed: 06/13/2023]
Abstract
Environmental pollution plays an important role in amphibian population decline. Contamination with endocrine disrupting chemicals (EDCs) is particularly worrying due to their capacity to adversely affect organisms at low doses. We hypothesized that exposure to EDCs such as 4-nonylphenol (NP) and cyproterone acetate (CPA) could trigger responses in the liver and gonads, due to toxic and endocrine disrupting effects. Growth rate may also be impaired by contamination. We investigated sublethal effects of a 28-day exposure to three different concentrations of NP and CPA on liver pigmentation, gonadal morphology, body mass, and length of tadpoles and juveniles Lithobates catesbeianus. Liver pigmentation and the gonadal morphologies of treated tadpoles did not differ from control, but growth rate was impaired by both pollutants. Juveniles treated with 10 μg/L NP and 0.025 and 0.25 ng/L CPA displayed increased liver melanin pigmentation, but gonadal morphologies, sex ratios, and body mass were not affected after treatments. The increase in liver pigmentation may be related to defensive, cytoprotective role of melanomacrophages. The decreased growth rate in tadpoles indicates toxic effects of NP and CPA. Thus, contamination with NP and CPA remains a concern and sublethal effects of different dosages of the compounds on native species should be determined.
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Affiliation(s)
- Lara Salgueiro de Gregorio
- Post-graduate Program in Biodiversity, Department of Biology, São Paulo State University (UNESP), CEP 15054-000, São José do Rio Preto, São Paulo, Brazil.
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas - UNESP/IBILCE, Rua Cristóvão Colombo, 2265, Bairro: Jardim Nazareth, São José do Rio Preto, SP, 15054-000, Brazil.
| | - Lilian Franco-Belussi
- Department of Biology, São Paulo State University (UNESP), CEP 15054-000, São José do Rio Preto, São Paulo, Brazil
- Laboratory of Experimental Pathology (LAPEx), Federal University of Mato Grosso do Sul (UFMS), Institute of Biosciences (INBIO), CEP 79002-970, Campo Grande, Mato Grosso do Sul, Brazil
| | - Javier Goldberg
- Laboratorio de Biología del Comportamiento, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Diversidad y Ecología Animal (IDEA), Vélez Sársfield 299, CP X5000JJC, Córdoba, Argentina
| | - Classius De Oliveira
- Department of Biology, São Paulo State University (UNESP), CEP 15054-000, São José do Rio Preto, São Paulo, Brazil
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Wang W, Yang Y, Chen A, Song X, Chai L. Inhibition of Metamorphosis, Thyroid Gland, and Skeletal Ossification Induced by Hexavalent Chromium in Bufo gargarizans Larvae. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2021; 40:2474-2483. [PMID: 34003524 DOI: 10.1002/etc.5114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 01/19/2021] [Accepted: 05/07/2021] [Indexed: 06/12/2023]
Abstract
Hexavalent chromium (Cr [VI]) is one of the major detrimental heavy metal pollutants. In the present study, Bufo gargarizans were exposed to 0, 52, 104, 208, and 416 μg/L Cr (VI) from Gosner stage 2 until metamorphosis; and growth, development, and histological characteristics of the thyroid gland and skeletal ossification were examined. The results demonstrated that the survival rate of larvae exposed to Cr (VI) was not different from that measured in animals from the control group. However, high levels of Cr (VI) (104, 208, and 416 μg/L) were associated with significantly delayed growth and development. The suppression of skeletal ossification was observed at high Cr (VI) levels. Besides, histological alterations of the thyroid gland, such as follicular cell hyperplasia, colloid depletion, and peripheral colloid vacuolation, were found in 52 to 416 μg/L Cr (VI) treatments. The results of the present study highlight reductions in growth and development as well as percent metamorphosis and skeletal ossification due to histological alteration of the thyroid gland during exposure to Cr (VI) in B. gargarizans larvae. The present investigation could provide a basis for understanding the detrimental effects of Cr (VI) in amphibian larvae. Environ Toxicol Chem 2021;40:2474-2483. © 2021 SETAC.
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Affiliation(s)
- Wenxiang Wang
- School of Water and Environment, Chang'an University, Xi'an, China
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang'an University, Xi'an, China
| | - Yijie Yang
- School of Water and Environment, Chang'an University, Xi'an, China
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang'an University, Xi'an, China
| | - Aixia Chen
- School of Water and Environment, Chang'an University, Xi'an, China
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang'an University, Xi'an, China
| | - Xiuling Song
- School of Water and Environment, Chang'an University, Xi'an, China
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang'an University, Xi'an, China
| | - Lihong Chai
- School of Water and Environment, Chang'an University, Xi'an, China
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang'an University, Xi'an, China
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7
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Cao J, Feng C, Xie L, Li L, Chen J, Yun S, Guo W, Wang T, Wu Y, Meng R, Wang G, He X, Luo Y. Sesamin attenuates histological alterations, oxidative stress and expressions of immune-related genes in liver of zebrafish (Danio rerio) exposed to fluoride. FISH & SHELLFISH IMMUNOLOGY 2020; 106:715-723. [PMID: 32860904 DOI: 10.1016/j.fsi.2020.08.039] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/01/2020] [Accepted: 08/21/2020] [Indexed: 06/11/2023]
Abstract
Sesamin is the main lignan in sesame and is reported to have many benefits and medicinal properties. However, its protective effects against fluoride-induced damage in the liver of zebrafish have not been elucidated. Our previous studies found that fluoride exposure caused damage to the liver of zebrafish. In the study, the effects of sesamin on oxidative stress and immune damage in liver of zebrafish exposed to fluoride were measured. The results indicated that fluoride exposure damaged the microstructures of liver, increased significantly the oxidative stress, decreased remarkably the activities of ACP, AKP, and LZM, and affected obviously the expressions of immune-related genes. Treatment with sesamin remarkably attenuated fluoride-induced liver damage in a dose-dependent manner, indicated by the histopathological observation. Furthermore, sesamin treatment also significantly inhibited the production of ROS and oxidative stress, such as the decrease of lipid peroxidation level and the increase of CAT and SOD activities in liver. Sesamin treatment reversed the activities of immune-related enzymes and the expressions of immune-related genes in liver exposed to fluoride. These findings suggested that sesamin could protect the liver from fluoride-induced immune damage by oxidative stress downstream-mediated changes in reversing the activities of immune-related enzymes and the expressions of immune-related genes. Taken together, sesamin plays an important role in maintaining hepatic health and preventing liver from toxic damage caused by fluoride.
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Affiliation(s)
- Jinling Cao
- College of Food Science and Technology, Shanxi Agricultural University, Taigu, 030801, Shanxi, China.
| | - Cuiping Feng
- College of Food Science and Technology, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
| | - Lingtian Xie
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Lijuan Li
- College of Information, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
| | - Jianjie Chen
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China
| | - Shaojun Yun
- College of Food Science and Technology, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
| | - Wenjing Guo
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China
| | - Tianyu Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China
| | - Yijie Wu
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China
| | - Rui Meng
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China
| | - Guodong Wang
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China
| | - Xinjing He
- College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi, 030801, China
| | - Yongju Luo
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Science, Nanning, 530021, Guangxi, China.
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8
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Liu R, Zhang Y, Gao J, Li X. Effects of octylphenol exposure on the lipid metabolism and microbiome of the intestinal tract of Rana chensinensis tadpole by RNAseq and 16s amplicon sequencing. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 197:110650. [PMID: 32315788 DOI: 10.1016/j.ecoenv.2020.110650] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 03/20/2020] [Accepted: 04/14/2020] [Indexed: 06/11/2023]
Abstract
Octylphenol (OP) is a widely distributed endocrine disrupting chemical (EDC), and can be commonly found in various and diverse environmental media. Previous studies have reported that OP exposure could cause many adverse effects on aquatic animals. However, knowledge concerning the impact of OP on lipid metabolism in amphibians was still limited. In our study, Rana chensinensis tadpoles were exposed to different OP concentrations (0, 10-8, 10-7 and 10-6 mol/L) from the Gosner stage (Gs) 25-38. The RNA-seq analysis of tadpole intestines was explored by RNA-seq, and six differentially expressed genes (DEGs) related to the fat digestion and absorption were validated by RT-qPCR. Moreover, we used 16s amplicon sequencing to evaluate effects of OP on intestinal microbiome in tadpoles, further determining the variations of lipid metabolism. Our results revealed that OP exposure influenced gene expression levels related to fat digestion and absorption and led to alteration of structure and composition of intestinal microbiome. At the phylum level, the Firmicutes/Bacteroidetes ratio was gradually decreased in OP exposure groups, which disrupted lipid metabolism. According to the results of intestinal microbial functional prediction, OP exposure interfered with metabolic function and increased risk of disease. These data provide us with powerful resources to assess the effects of OP on lipid metabolism by integrating RNAseq and 16s amplicon sequencing analysis of intestinal tract and intestinal microbiome.
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Affiliation(s)
- Rong Liu
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, China
| | - Yuhui Zhang
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, China
| | - Jinshu Gao
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, China
| | - Xinyi Li
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, China.
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9
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Wang X, Zheng R, Yao Q, Liang Z, Wu M, Wang H. Effects of fluoride on the histology, lipid metabolism, and bile acid secretion in liver of Bufo gargarizans larvae. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 254:113052. [PMID: 31465901 DOI: 10.1016/j.envpol.2019.113052] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/12/2019] [Accepted: 08/11/2019] [Indexed: 06/10/2023]
Abstract
In our study, Bufo gargarizans (B. gargarizans) larvae were exposed to control, 0.5, 5, 10 and 50 mg/L of NaF from Gs 26 to 42. At Gs 42, we evaluated the changes of liver histology and the mRNA levels of target genes in liver. In addition, we also examined the composition and content of fatty acids. Histological analysis revealed that fluoride caused liver injury, such as the increase of number of melanomacrophage centres, atrophy of nucleus, dilation of bile canaliculus, and decrease of quantity, degradation and deposition of lipid droplets. The results of RT-qPCR indicated that exposure to 5, 10 and 50 mg/L of NaF significantly decreased the transcript levels of genes related to fatty acid synthesis (FASN, FAE, MECR, KAR and TECR) in liver. Besides, mRNA expression of genes involved in fatty acid β-oxidation (ECHS1, HADHA, SCP2, CPT2, ACAA1 and ACAA2) and oxidative stress (SOD, GPx, MICU1 and HSP90) was significantly downregulated in 0.5, 5, 10 and 50 mg/L of NaF treatment groups. Also, in the relative expression of genes associated with synthesis and secretion of bile acid, BSEP significantly increased at 0.5, 5 and 50 mg/L of NaF while HSD3B7 significantly reduced in 0.5, 5, 10 and 50 mg/L of NaF. Finally, the fatty acid extraction and GC-MS analysis showed that the content of saturated fatty acids (SFAs) was decreased and the content of polyunsaturated fatty acids (PUFAs) was increased in all fluoride treatment groups. Taken together, the present results indicated that fluoride-induced the histological alterations of liver might be linked to the disorder of lipid metabolism, oxidative damage.
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Affiliation(s)
- Xianchan Wang
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, PR China
| | - Rui Zheng
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, PR China
| | - Qiong Yao
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, PR China
| | - Zhijia Liang
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, PR China
| | - Minyao Wu
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, PR China
| | - Hongyuan Wang
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, PR China.
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10
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Pollo F, Bionda C, Otero M, Grenat P, Babini S, Flores P, Grisolia M, Salas N, Martino A. Morphological abnormalities in natural populations of the common South American toad Rhinella arenarum inhabiting fluoride-rich environments. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 177:32-38. [PMID: 30959310 DOI: 10.1016/j.ecoenv.2019.03.098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 03/22/2019] [Accepted: 03/24/2019] [Indexed: 06/09/2023]
Abstract
Morphological abnormalities in amphibians may be attributed to contaminants, ultraviolet radiation and trematode parasites, or a synergistic effect between them. In the present study, morphological abnormalities in Rhinella arenarum adults from natural and artificial fluoride-rich environments were identified and evaluated. Three sites were sampled in central Argentina: Los Vallecitos stream (LF-LV), Los Cerros Negros stream (MF-CN), and Decantation ponds (HF-DP), with low (0.33 mg/L), middle (2.03 mg/L) and high (14.0 mg/L) fluoride levels respectively; the latter site is associated with a fluoride mine. Abnormal individuals were photographed and then standard radiographs were taken. Abnormality frequencies and relative percentage of abnormal individuals were calculated for each site. In addition, skeletochronology was used to estimate toad's age. Five abnormality types were identified: syndactyly, ectrodactyly, polydactyly, microphthalmia and ectromelia. Percentages of abnormal individuals per site were: LF-LV = 4%, MF-CN = 21.2% and HF-DP = 6.4%. The MF-CN and HF-DP populations had morphological abnormality frequencies that exceeded the reference value (5%) reported in the literature. The average age did not differ between sites. The results of this study indicate that there is an association between frequency of morphological abnormalities and high fluoride levels.
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Affiliation(s)
- Favio Pollo
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional N° 36-km 601, X5804BYA, Río Cuarto, Argentina; National Council for Scientific and Technical Research CONICET Fellowships, Argentina
| | - Clarisa Bionda
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional N° 36-km 601, X5804BYA, Río Cuarto, Argentina; National Council for Scientific and Technical Research CONICET Fellowships, Argentina
| | - Manuel Otero
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional N° 36-km 601, X5804BYA, Río Cuarto, Argentina; National Council for Scientific and Technical Research CONICET Fellowships, Argentina.
| | - Pablo Grenat
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional N° 36-km 601, X5804BYA, Río Cuarto, Argentina; National Council for Scientific and Technical Research CONICET Fellowships, Argentina
| | - Selene Babini
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional N° 36-km 601, X5804BYA, Río Cuarto, Argentina; National Council for Scientific and Technical Research CONICET Fellowships, Argentina
| | - Patricia Flores
- Radiología Veterinaria Facultad de Agronomía y Veterinaria, UNRC, ruta 36 km 601, Río Cuarto, Córdoba, Argentina
| | - Marta Grisolia
- Radiología Veterinaria Facultad de Agronomía y Veterinaria, UNRC, ruta 36 km 601, Río Cuarto, Córdoba, Argentina
| | - Nancy Salas
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional N° 36-km 601, X5804BYA, Río Cuarto, Argentina
| | - Adolfo Martino
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional N° 36-km 601, X5804BYA, Río Cuarto, Argentina
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11
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Pollo FE, Cibils-Martina L, Otero MA, Baraquet M, Grenat PR, Salas NE, Martino AL. Anuran tadpoles inhabiting a fluoride-rich stream: diets and morphological indicators. Heliyon 2019; 5:e02003. [PMID: 31304418 PMCID: PMC6600003 DOI: 10.1016/j.heliyon.2019.e02003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/11/2019] [Accepted: 06/21/2019] [Indexed: 11/15/2022] Open
Abstract
We in situ assessed the influence of natural fluoride concentrations in lotic freshwater ecosystems on diet and morphology of Boana cordobae tadpoles. Two streams were sampled in Argentina: Los Vallecitos stream (LF-LV) and Los Cerros Negros stream (HF-CN) with low and high fluoride levels, respectively. We captured tadpoles of B. cordobae in each stream using nets. Body weight (BW), total length (TL) and body condition (BC) of tadpoles was registered. Food items were identified to genus level and assigned to functional traits. Tadpoles showed significant differences in TL between streams, with smaller individuals in HF-CN, while did not show differences in BW and BC. The diet of tadpoles consisted mostly of microalgae. In tadpoles from HF-CN stream the proportion of cyanobacteria was lower than tadpoles from LF-LV. In relation to functional traits, small algae, high profile and colonial algae were more abundant in HF-CN. Algae attached by pads showed a higher proportion in HF-CN diets and stalked algae were more abundant in LF-LV. The differences in TL and diet of tadpoles can be attributed to differences in algal community composition, with genera that are affected by high concentrations of natural fluoride; for example cyanobacteria. The low algal richness registered in HF-CN stream does not affect the physiological state of the tadpoles, possibly because of a higher algal density in HF-CN diets. However, in further studies it would be important to evaluate the population status of B. cordobae from the HF-CN, because a small body length of tadpoles could have consequences at the population level.
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Affiliation(s)
- Favio E Pollo
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, ruta 36km 601, Río Cuarto, Córdoba, Argentina.,Instituto de Ciencias de la Tierra, Biodiversidad y Sustentabilidad Ambiental (ICBIA), UNRC-CONICET, Argentina
| | - Luciana Cibils-Martina
- Botánica Sistemática, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, Argentina.,Instituto de Ciencias de la Tierra, Biodiversidad y Sustentabilidad Ambiental (ICBIA), UNRC-CONICET, Argentina
| | - Manuel A Otero
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, ruta 36km 601, Río Cuarto, Córdoba, Argentina.,Instituto de Ciencias de la Tierra, Biodiversidad y Sustentabilidad Ambiental (ICBIA), UNRC-CONICET, Argentina
| | - Mariana Baraquet
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, ruta 36km 601, Río Cuarto, Córdoba, Argentina.,Instituto de Ciencias de la Tierra, Biodiversidad y Sustentabilidad Ambiental (ICBIA), UNRC-CONICET, Argentina
| | - Pablo R Grenat
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, ruta 36km 601, Río Cuarto, Córdoba, Argentina.,Instituto de Ciencias de la Tierra, Biodiversidad y Sustentabilidad Ambiental (ICBIA), UNRC-CONICET, Argentina
| | - Nancy E Salas
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, ruta 36km 601, Río Cuarto, Córdoba, Argentina
| | - Adolfo L Martino
- Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, ruta 36km 601, Río Cuarto, Córdoba, Argentina
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12
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Wang S, Yan LC, Zheng SS, Li TT, Fan LY, Huang T, Li C, Zhao YH. Toxicity of some prevalent organic chemicals to tadpoles and comparison with toxicity to fish based on mode of toxic action. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 167:138-145. [PMID: 30317118 DOI: 10.1016/j.ecoenv.2018.09.105] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 09/11/2018] [Accepted: 09/24/2018] [Indexed: 06/08/2023]
Abstract
Although mode of action (MOA) plays a key role in the understanding of the toxic mechanism of chemicals, the MOAs of class-based compounds to tadpoles have not been investigated. To explore the MOAs, acute toxicity (expressed as log 1/LC50) to Rana chensinensis tadpoles were determined and molecular descriptors were calculated. Quantitative structure-activity relationship (QSAR) showed that toxicity to tadpoles is closely related to the chemical octanol/water partition coefficient (log KOW), energy of the lowest unoccupied molecular orbital (ELUMO), and number of hydrogen bond donors and acceptors (NHDA), representing the bio-uptake potential in tadpoles, the electrophilicity and hydrogen bonding capacity with target site(s), respectively. Comparison of the toxicity values between tadpoles and fish revealed that there were no significant differences for the overlapping compounds (average residual = 0.29 between tadpole and fish toxicity) with P values of interspecies correlation substantially less than 0.001. Classification of MOAs for the class-based compounds based on the excess toxicity calculated from toxicity ratio suggested that baseline, less inert compounds and some reactive or specifically-acting compounds share same MOAs between tadpoles and fish. Fish and tadpoles can serve as surrogates for each other in the safety evaluation of organic pollutants.
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Affiliation(s)
- Shuo Wang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin 130117, PR China
| | - Li C Yan
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin 130117, PR China
| | - Shan S Zheng
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin 130117, PR China
| | - Tian T Li
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin 130117, PR China
| | - Ling Y Fan
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin 130117, PR China
| | - Tao Huang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin 130117, PR China
| | - Chao Li
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin 130117, PR China.
| | - Yuan H Zhao
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin 130117, PR China.
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13
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Mu D, Meng J, Bo X, Wu M, Xiao H, Wang H. The effect of cadmium exposure on diversity of intestinal microbial community of Rana chensinensis tadpoles. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 154:6-12. [PMID: 29453162 DOI: 10.1016/j.ecoenv.2018.02.022] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 01/19/2018] [Accepted: 02/05/2018] [Indexed: 06/08/2023]
Abstract
Cadmium is a natural and widely distributed toxicant, and can be commonly found in environment. Intestinal microbiota plays a very important role in maintaining its host's health. The effects of cadmium on the intestinal microbiota composition and stability of amphibians are little known. We exposed Rana chensinensis (R. chensinensis) embryos to different concentrations of cadmium (0, 112 and 448 μg Cd L-1) until they reached Gosner stage 38, and analyzed their microbial communities using 16S rRNA amplicon sequencing. By measures of both alpha and beta diversity, intestinal microbial communities were significantly differentiated in 448 μg Cd L-1 exposure groups. Cadmium exposure significantly altered the intestinal microflora diversity and composition of R. chensinensis. At the phylum level, it is worth noting that Fusobacteria and Spirochaetae were not detected in 448 μg Cd L-1 exposure groups. Firmicutes rapidly decreased in 448 μg Cd L-1 exposure group. At the genus level, Succinispira (Firmicutes), Desulfovibrio (Proteobacteria) and Fusobacterium (Fusobacteria) vanished in 448 μg Cd L-1 exposure groups. Our results demonstrate that cadmium exposure changed the composition and decreased the community diversity of intestinal microbiota of R. chensinensis tadpoles. Our study may provide a new framework based on intestinal microbiota to evaluate the response of amphibians to environmental chemicals pollution.
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Affiliation(s)
- Danyang Mu
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Jinhua Meng
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Xiaoxue Bo
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Minyao Wu
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Hui Xiao
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Hongyuan Wang
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China.
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14
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Bo X, Mu D, Wu M, Xiao H, Wang H. The morphological changes and molecular biomarker responses in the liver of fluoride-exposed Bufo gargarizans larvae. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 151:199-205. [PMID: 29367176 DOI: 10.1016/j.ecoenv.2018.01.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/09/2018] [Accepted: 01/11/2018] [Indexed: 06/07/2023]
Abstract
The goal of the current study was to evaluate the negative influences of fluoride on liver of Bufo gargarizans larvae. B. gargarizans larvae were treated with 42.4mgF-/L for 0, 24, 48 and 72h at Gosner stage 37. The morphological changes and responses of molecular biomarkers involved in lipid metabolism, oxidative stress and apoptosis were examined in liver. Disappearance of cell boundaries, degeneration of hepatic parenchyma cells and significant increase in the number of melanomacrophage centres and the quantity of lipid droplets were found in the liver treated with 42.4mgF-/L for 72h. In addition, in the relative expression of acetyl CoA carboxylase 1 (ACC-1), fatty acid elongase 1 (FAE-1), sterol carrier protein 2 (SCP-2), and carnitine palmitoyltransferase-1 (CPT-1), decrease was observed after 24, 48 and 72h of 42.4mgF-/L exposure. Furthermore, the transcript levels of superoxide dismutase (SOD) and glutathione peroxidase (GPx) were downregulated in tadpoles exposed for 24, 48 and 72h to 42.4mgF-/L, while the transcript level of heat shock protein 90 (HSP90) was upregulated at 42.4mgF-/L for 72h. Also, mRNA expression of Bcl-2-associated transcription factor 1(BCLAF1) and thyroid hormone receptors (TRα and TRβ) was significantly upregulated in tadpoles treated with 42.4mgF-/L for 72h. Therefore, our results suggested that the liver injury induced by fluoride might result from disruption of lipid metabolism, oxidative damage and apoptosis.
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Affiliation(s)
- Xiaoxue Bo
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Danyang Mu
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Minyao Wu
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Hui Xiao
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Hongyuan Wang
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China.
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15
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Zhang Y, Xie L, Li X, Chai L, Chen M, Kong X, Wang Q, Liu J, Zhi L, Yang C, Wang H. Effects of fluoride on morphology, growth, development, and thyroid hormone of Chinese toad (Bufo gargarizans) embryos. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2018; 59:123-133. [PMID: 29024016 DOI: 10.1002/em.22147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 09/02/2017] [Accepted: 09/24/2017] [Indexed: 06/07/2023]
Abstract
Excessive fluoride in natural water ecosystem has the potential to detrimentally affect amphibians, but little is known of such effects or underlying mechanisms in Bufo gargarizans embryos. In the present study, the effects of fluoride exposure on B. gargarizans embryos were investigated. First, fluoride teratogenic experiment showed that the 9 days EC50 of fluoride on B. gargarizans embryos was 177.62 mg/L. Then, we studied the sublethal effects of fluoride on B. gargarizans embryos at control, 0.7, 4.1, 19.6, 41.9, and 62.7 mg/L fluoride concentration. Malformation, growth, and development of embryos were monitored, and type 2 and 3 iodothyronine deiodinase (Dio2 and Dio3), thyroid hormone receptors (TRα and TRβ) mRNA levels were measured. Our results showed the morphological malformations, such as tail curvature (lordosis), edema, cuticularized ciliated cells, and hyperplasia were occurred during fluoride exposure. Growth and development were all inhibited at 19.5, 41.9, and 62.7 mg/L fluoride-treated groups after 9 days' exposure. According to real-time PCR results, exposure to fluoride upregulated Dio3 and TRβ mRNA expression and downregulated Dio2 and TRα mRNA level. All above indicated that excessive fluoride could induce morphology malformations, inhibit embryonic growth and development, and disrupt the normal function of maternal thyroid hormone in B. gargarizans embryos. Environ. Mol. Mutagen. 59:123-133, 2018. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Yuhui Zhang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Lei Xie
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Xinyi Li
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Lihong Chai
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang'an University, Xi'an, 710054, China
| | - Mengxing Chen
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Xiaojing Kong
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Qingqing Wang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Jingfei Liu
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Lijuan Zhi
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Chang Yang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Hongyuan Wang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
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16
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Daiwile AP, Sivanesan S, Tarale P, Naoghare PK, Bafana A, Parmar D, Kannan K. Role of fluoride induced histone trimethylation in development of skeletal fluorosis. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 57:159-165. [PMID: 29275289 DOI: 10.1016/j.etap.2017.12.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 10/25/2017] [Accepted: 12/16/2017] [Indexed: 05/19/2023]
Abstract
Chronic exposure to fluoride has been associated with the development of skeletal fluorosis. Limited reports are available on fluoride induced histone modification. However, the role of histone modification in the pathogenesis of skeletal fluorosis is not investigated. In the present study, we have investigated the role of fluoride induced histone modification on fluorosis development using human osteosarcoma (HOS) cell line. The expression of histone methyltransferases (EHMT1 and EHZ2) and level of global histone trimethylation (H3K9 and H3K27) have been assessed and observed to be increased significantly after fluoride exposure (8 mg/L). EpiTect chromatin immunoprecipitation (CHIP) qPCR Array (Human TGFβ/BMP signaling pathway) was performed to assess the H3K9 trimethylation at promoter regions of pathway-specific genes. H3K9 ChIP PCR array analysis identified hyper H3K9 trimethylation in promoter regions of TGFBR2 and SMAD3. qPCR and STRING analysis was carried out to determine the repressive epigenetic effect of H3K9 trimethylation on expression pattern and functional association of identified genes. Identified genes (TGFBR2 and SMAD3) showed down-regulation which confirms the repressive epigenetic effect of promoter H3K9 hyper trimethylation. Expression of two other vital genes COL1A1 and MMP13 involved in TGFBR2-SMAD signaling pathway was also found to be down-regulated with a decrease in expression of TGFBR2 and SMAD3. STRING analysis revealed functional association and involvement of identified genes TGFBR2, SMAD3, COL1A1 and MMP13 in the collagen and cartilage development/morphogenesis, connective tissue formation, bio-mineral tissue development, endochondral bone formation, bone and skeletal morphogenesis. In conclusion, present investigation is a first attempt to link fluoride induced hyper H3K9 tri-methylation mediated repression of TGFBR2 and SMAD3 with the development of skeletal fluorosis.
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Affiliation(s)
- Atul P Daiwile
- Environmental Impact Sustainability Division, CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur, 440020, India
| | - Saravanadevi Sivanesan
- Environmental Impact Sustainability Division, CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur, 440020, India.
| | - Prashant Tarale
- Environmental Impact Sustainability Division, CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur, 440020, India
| | - Pravin K Naoghare
- Environmental Impact Sustainability Division, CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur, 440020, India
| | - Amit Bafana
- Environmental Impact Sustainability Division, CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur, 440020, India
| | - Devendra Parmar
- Developmental Toxicology Division, CSIR-Indian Institute of Toxicology Research (IITR), Lucknow 226001, India
| | - Krishnamurthi Kannan
- Environmental Impact Sustainability Division, CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur, 440020, India
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17
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Chai L, Li Y, Chen Z, Chen A, Deng H. Responses of growth, malformation, and thyroid hormone-dependent genes expression in Bufo gargarizans embryos following chronic exposure to Pb 2. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:27953-27962. [PMID: 28988273 DOI: 10.1007/s11356-017-0413-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 10/03/2017] [Indexed: 06/07/2023]
Abstract
The aim of this study was to examine the adverse effects of lead (Pb) exposure on Bufo gargarizans embryos. The 96 h-LC50 of Pb2+ for B. gargarizans embryos was determined to be 26.6 mg L-1 after an acute test. In the chronic test, B. gargarizans embryos at Gosner stage 3 were exposed to 10~2000 μg Pb2+ L-1 during embryogenesis. Total length, weight, developmental stage, and malformation were monitored. In addition, the transcript levels of type II and type III iodothyronine deiodinase (Dio2 and Dio3) and thyroid hormone receptors (TRα and TRβ) were determined to assess the thyroid-disrupting effects of Pb2+. Slightly increased growth and development of B. gargarizans embryos were observed at low concentrations of Pb2+ (10, 50, and 100 μg L-1), while retarded growth and development were found at high concentrations of Pb2+ (1000 and 2000 μg L-1). In addition, Pb2+ exposure induced morphological abnormalities, which were characterized by edema at tail, wavy fin, abdominal edema, stunted growth, hyperplasia, and axial flexures in B. gargarizans embryos. Furthermore, our results showed that exposure to 2000 μg Pb2+ L-1 decreased the transcript levels of Dio2, TRα, and TRβ, but it increased Dio3 mRNA level. In contrast, exposure to 50 μg Pb2+ L-1 increased TRα mRNA level and decreased Dio3 mRNA level. These results suggested that Pb2+ might have thyroid-disrupting effects, leading to the disruption of growth and development in B. gargarizans embryos.
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Affiliation(s)
- Lihong Chai
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710054, People's Republic of China.
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region Ministry of Education, Xi'an, 710062, People's Republic of China.
| | - Yanbin Li
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710054, People's Republic of China
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region Ministry of Education, Xi'an, 710062, People's Republic of China
| | - Zhihong Chen
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710054, People's Republic of China
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region Ministry of Education, Xi'an, 710062, People's Republic of China
| | - Aixia Chen
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710054, People's Republic of China
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region Ministry of Education, Xi'an, 710062, People's Republic of China
| | - Hongzhang Deng
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710054, People's Republic of China
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region Ministry of Education, Xi'an, 710062, People's Republic of China
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Deng H, Chai L, Luo P, Zhou M, Nover D, Zhao X. Toxic effects of NH 4+-N on embryonic development of Bufo gargarizans and Rana chensinensis. CHEMOSPHERE 2017; 182:617-623. [PMID: 28525875 DOI: 10.1016/j.chemosphere.2017.02.156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 02/18/2017] [Accepted: 02/21/2017] [Indexed: 06/07/2023]
Abstract
Although nitrogen fertilizer is commonly used worldwide, little information is currently available about NH4+-N toxicity on amphibians. This study determined the acute and chronic toxic effects of NH4+-N on two native Chinese amphibian species (Bufo gargarizans and Rana chensinensis), and compared the negative sensitivity of different embryos to NH4+-N. Static renewal aqueous exposures were performed using B. gargarizans and R. chensinensis embryos at Gosner stage 2 over 96 h. In terms of 96 h-LC50, B. gargarizans and R. chensinensis embryos had significantly different responses to NH4+-N, and the latter was more sensitive to NH4+-N than the former. In the chronic toxicity test, exposure to 10 mg L-1NH4+-N or higher significantly decreased the hatching rate of embryos in both species. Significant increases in the abnormality rate of embryos at 50 mg L-1NH4+-N or higher were observed and morphological abnormalities were characterized by axial flexures, yolk sac edema, and hyperplasia in both species. Additionally, the total length of embryos decreased in a dose-dependent manner after exposure to NH4+-N. The results indicate that NH4+-N exposure can increase abnormality and inhibit the hatching and development of embryos in B. gargarizans and R. chensinensis.
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Affiliation(s)
- Hongzhang Deng
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an, 710064, China; School of Environmental Science and Engineering, Chang'an University, Xi'an, 710064, China
| | - Lihong Chai
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an, 710064, China; School of Environmental Science and Engineering, Chang'an University, Xi'an, 710064, China
| | - Pingping Luo
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an, 710064, China; School of Environmental Science and Engineering, Chang'an University, Xi'an, 710064, China.
| | - Meimei Zhou
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an, 710064, China; School of Environmental Science and Engineering, Chang'an University, Xi'an, 710064, China
| | - Daniel Nover
- School of Engineering, University of California - Merced, Merced, CA, 95343, USA
| | - Xiaohong Zhao
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an, 710064, China; School of Environmental Science and Engineering, Chang'an University, Xi'an, 710064, China
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Camargo JA, Alonso Á. Ecotoxicological assessment of the impact of fluoride (F -) and turbidity on the freshwater snail Physella acuta in a polluted river receiving an industrial effluent. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:15667-15677. [PMID: 28523621 DOI: 10.1007/s11356-017-9208-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 05/04/2017] [Indexed: 06/07/2023]
Abstract
We carried out field studies and laboratory experiments to assess the impact of fluoride (F-) and turbidity on the freshwater snail Physella acuta in a polluted river receiving an industrial effluent (the middle Duraton River, Central Spain). Fluoride concentrations and turbidity levels significantly increased downstream from the industrial effluent (with the highest values being 0.6 mg F-/L and 55.2 nephelometric turbidity unit). In addition, higher deposition of fine inorganic matter was evident at polluted sampling sites. Conversely, the abundance of P. acuta significantly declined (until its virtual disappearance) downstream from the industrial effluent. Toxicity bioassays showed that P. acuta is a relatively tolerant invertebrate species to fluoride toxicity, with estimated safe concentrations (expressed as LC0.10 values for infinite hours of exposure) for juvenile and adult snails being 2.4 and 3.7 mg F-/L, respectively. Furthermore, juvenile snails (more sensitive than adult snails) did not show significant alterations in their behavior through 15 days of exposure to 2.6 mg F-/L: mean values of the proportion of test snails located on the water surface habitat, as well as mean values of the sliding movement rate (velocity) of test snails, never showed significant differences when comparing control and treatment glass vessels. It is concluded that instream habitat degradation, derived from increased turbidity levels, might be a major cause for significant reductions in the abundance of P. acuta downstream from the industrial effluent. The presence of the competing gastropod Ancylus fluviatilis could also affect negatively the recovery of P. acuta abundance.
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Affiliation(s)
- Julio A Camargo
- Unidad Docente de Ecología, Departamento de Ciencias de la Vida, Universidad de Alcalá, 28805, Alcalá de Henares, Madrid, Spain.
| | - Álvaro Alonso
- Unidad Docente de Ecología, Departamento de Ciencias de la Vida, Universidad de Alcalá, 28805, Alcalá de Henares, Madrid, Spain
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Chai L, Wang H, Zhao H, Dong S. Chronic Effects of Fluoride Exposure on Growth, Metamorphosis, and Skeleton Development in Bufo gargarizans Larvae. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2017; 98:496-501. [PMID: 28197705 DOI: 10.1007/s00128-017-2036-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 01/25/2017] [Indexed: 06/06/2023]
Abstract
Bufo gargarizans tadpoles were chronically exposed to waterborne fluoride at measured concentrations ranging from 0.4 to 61.2 mg F-/L for 70 days from Gosner stage 26 to completion of metamorphosis. The chronic exposure caused a concentration-dependent mortality in all tested fluoride concentrations. Total length, snout-to-vent length (SVL), body mass, and developmental stage of tadpoles were significantly inhibited at 42.6 mg F-/L. In addition, significant metamorphic delay and increase in size at completion of metamorphosis occurred after exposure to 19.8 mg F-/L. Moreover, 19.8 mg F-/L suppressed the bone mineralization of larvae at completion of metamorphosis. However, the bone mineralization could be enhanced by 4.1 mg F-/L. In conclusion, our results suggested that the presence of high concentrations of fluoride could increase mortality risk, delay metamorphosis, and suppress skeletal ossification in B. gargarizans larvae.
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Affiliation(s)
- Lihong Chai
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710054, People's Republic of China
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an, 710054, China
| | - Hongyuan Wang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Hongfeng Zhao
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Suiming Dong
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710054, People's Republic of China.
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an, 710054, China.
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Pollo FE, Grenat PR, Otero MA, Salas NE, Martino AL. Assessment in situ of genotoxicity in tadpoles and adults of frog Hypsiboas cordobae (Barrio 1965) inhabiting aquatic ecosystems associated to fluorite mine. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 133:466-474. [PMID: 27522316 DOI: 10.1016/j.ecoenv.2016.08.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 08/02/2016] [Accepted: 08/05/2016] [Indexed: 06/06/2023]
Abstract
Non-lethal biological techniques such as blood biomarkers have gained attention due to their value as early signals of anthropic effects of contamination representing significant tools to evaluate ecosystems health. We evaluate and characterize in situ genotoxicity of water samples collected from aquatic ecosystems around a fluorite mine using amphibian frogs Hypsiboas cordobae as bioindicator species complemented with 16 physicochemical parameters. Four stations associated with fluorite mine sampling were sampled: a stream running on granitic rock with natural high fluorite content; two streams both running on metamorphic rock with low fluorite content; and an artificial decantation pond containing sediments produced by fluorite flotation process with high variation in physicochemical parameters. We analyses the blood of tadpoles and adults of H. Cordobae, calculated frequencies of micronuclei, erythrocyte nuclear abnormalities, mitosis, immature and enucleated erythrocytes. Individuals were measured and weighed and body condition was calculated. The results of this study indicate that individuals of decantation pond are exposed to compounds or mixtures which are causing cell damage when compared to those that were collected of stream. Larval stage was more vulnerable than the adult phase and it could be related mainly to the higher exposure time to xenobiotics, which can penetrate easily by skin, mouth and gills; additionally this site offers a reduced availability of food than other sites. Therefore, chronic exposure to pollutants could derive in degenerative and neoplastic diseases in target organs. Moreover these individuals may experience reproductive and behavioral disturbances which could lead to population decline in the long term.
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Affiliation(s)
- Favio E Pollo
- Ecología-Educación Ambiental, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, Ruta 36km 601, Río Cuarto, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| | - Pablo R Grenat
- Ecología-Educación Ambiental, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, Ruta 36km 601, Río Cuarto, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Manuel A Otero
- Ecología-Educación Ambiental, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, Ruta 36km 601, Río Cuarto, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Nancy E Salas
- Ecología-Educación Ambiental, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, Ruta 36km 601, Río Cuarto, Córdoba, Argentina
| | - Adolfo L Martino
- Ecología-Educación Ambiental, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, UNRC, Ruta 36km 601, Río Cuarto, Córdoba, Argentina
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