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Wang L, Zhang RK, Sang P, Xie YX, Zhang Y, Zhou ZH, Wang KK, Zhou FM, Ji XB, Liu WJ, Qiu JG, Jiang BH. HK2 and LDHA upregulation mediate hexavalent chromium-induced carcinogenesis, cancer development and prognosis through miR-218 inhibition. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 279:116500. [PMID: 38795416 DOI: 10.1016/j.ecoenv.2024.116500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 05/16/2024] [Accepted: 05/22/2024] [Indexed: 05/28/2024]
Abstract
Hexavalent chromium [Cr(VI)] is one of the most common environmental contaminants due to its tremendous industrial applications, but its effects and mechanism remain to be investigated. Our previous studies showed that Cr(VI) exposure caused malignant transformation and tumorigenesis. This study showed that glycolytic proteins HK2 and LDHA levels were statistically significant changed in blood samples of Cr(VI)-exposed workers and in Cr-T cells compared to the control subjects and parental cells. HK2 and LDHA knockdown inhibited cell proliferation and angiogenesis, and higher HK2 and LDHA expression levels are associated with advanced stages and poor prognosis of lung cancer. We found that miR-218 levels were significantly decreased and miR-218 directly targeted HK2 and LDHA for inhibiting their expression. Overexpression of miR-218 inhibited glucose consumption and lactate production in Cr-T cells. Further study found that miR-218 inhibited tumor growth and angiogenesis by decreasing HK2 and LDHA expression in vivo. MiR-218 levels were negatively correlated with HK2 and LDHA expression levels and cancer development in human lung and other cancers. These results demonstrated that miR-218/HK2/LDHA pathway is vital for regulating Cr(VI)-induced carcinogenesis and human cancer development.
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Affiliation(s)
- Lin Wang
- Academy of Medical Science, Tianjian Laboratory of Advanced Biomedical Sciences, Zhengzhou University, Zhengzhou 450000, China
| | - Rui-Ke Zhang
- Academy of Medical Science, Tianjian Laboratory of Advanced Biomedical Sciences, Zhengzhou University, Zhengzhou 450000, China
| | - Peng Sang
- Academy of Medical Science, Tianjian Laboratory of Advanced Biomedical Sciences, Zhengzhou University, Zhengzhou 450000, China
| | - Yun-Xia Xie
- Academy of Medical Science, Tianjian Laboratory of Advanced Biomedical Sciences, Zhengzhou University, Zhengzhou 450000, China
| | - Ye Zhang
- The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Zhi-Hao Zhou
- Academy of Medical Science, Tianjian Laboratory of Advanced Biomedical Sciences, Zhengzhou University, Zhengzhou 450000, China
| | - Kun-Kun Wang
- Academy of Medical Science, Tianjian Laboratory of Advanced Biomedical Sciences, Zhengzhou University, Zhengzhou 450000, China
| | - Feng-Mei Zhou
- Academy of Medical Science, Tianjian Laboratory of Advanced Biomedical Sciences, Zhengzhou University, Zhengzhou 450000, China
| | - Xiang-Bo Ji
- Academy of Medical Science, Tianjian Laboratory of Advanced Biomedical Sciences, Zhengzhou University, Zhengzhou 450000, China
| | - Wen-Jing Liu
- The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Jian-Ge Qiu
- Academy of Medical Science, Tianjian Laboratory of Advanced Biomedical Sciences, Zhengzhou University, Zhengzhou 450000, China.
| | - Bing-Hua Jiang
- Academy of Medical Science, Tianjian Laboratory of Advanced Biomedical Sciences, Zhengzhou University, Zhengzhou 450000, China.
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Islam S, Sarkar O, Mukherjee S, Kamila S, Bhowmik AD, Chattopadhyay A. Chronic low-dose chromium VI exposure induces oxidative stress and apoptosis with altered expressions of DNA repair genes and promoter hypermethylation in the liver of Swiss albino mice. J Appl Toxicol 2024. [PMID: 38523572 DOI: 10.1002/jat.4600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 02/23/2024] [Accepted: 03/04/2024] [Indexed: 03/26/2024]
Abstract
The present investigation dealt with harmful effects of hexavalent chromium (Cr [VI]) on liver of Swiss albino mice. This variant exhibited cytotoxicity, mutagenicity, and carcinogenicity. Our study focused on elucidating the hepatotoxic effects of chronic low-dose exposure to Cr (VI) (2, 5, and 10 ppm) administered via drinking water for 4 and 8 months. The observed elevation in SGPT, ALP, and SGOT and increased oxidative stress markers unequivocally confirmed the severe disruption of liver homeostasis at these low treatment doses. Noteworthy alterations in histoarchitecture, body weight, and water intake provided further evidences of the harmful effects of Cr (VI). Production of reactive oxygen species (ROS) during metabolism led to DNA damages. Immunohistochemistry and qRT-PCR analyses revealed that chronic low-dose exposure of Cr (VI) induced apoptosis in liver tissue. Our study exhibited alterations in the expression pattern of DNA repair genes (Rad51, Mutyh, Mlh1, and Ogg1), coupled with promoter hypermethylation of Mutyh and Rad51, leading to transcriptional inhibition. Our findings underscored the potential of low-dose Cr (VI) exposure on hepatotoxicity by the intricate interplay between apoptosis induction and epigenetic alterations of DNA repair genes.
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Affiliation(s)
- Shehnaz Islam
- Department of Zoology, Visva-Bharati, Santiniketan, West Bengal, India
| | - Olivia Sarkar
- Department of Zoology, Visva-Bharati, Santiniketan, West Bengal, India
| | - Sunanda Mukherjee
- Department of Zoology, Visva-Bharati, Santiniketan, West Bengal, India
| | - Sreejata Kamila
- Department of Zoology, Visva-Bharati, Santiniketan, West Bengal, India
| | - Arpan Dey Bhowmik
- Department of Zoology, Visva-Bharati, Santiniketan, West Bengal, India
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Zhao ML, Wang JX, Bian XK, Zhang J, Han YW, Xu SX, Lee SC, Zhao JZ. Hexavalent chromium causes centrosome amplification by inhibiting the binding between TMOD2 and NPM2. Toxicol Lett 2023; 380:12-22. [PMID: 36963620 DOI: 10.1016/j.toxlet.2023.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/15/2023] [Accepted: 03/21/2023] [Indexed: 03/26/2023]
Abstract
BACKGROUND Hexavalent chromium can promote centrosome amplification (CA) as well as tumorigenesis. Since CA can lead to tumorigenesis, it is plausible that the chromium promotes the development of cancer via CA. In the present study, we investigated the signaling pathways of the chromium-induced CA. RESULTS Our results showed that sub-toxic concentration of chromium was able to cause CA in HCT116 cells, and decrease the expression of TMOD2 and NPM2. Furthermore, TMOD2 and NPM2 interacted to each other via their C-terminal and the N-terminal, respectively, which was inhibited by the chromium. Overexpression of TMOD2 and NPM2 increased their binding and significantly attenuated the CA. Moreover, TMOD2 and NPM2 were co-localized with the centrosomes. The chromium inhibited the centrosomeal localization of NPM2, which was reversed by the overexpression of TMOD2, C-terminal of TMOD2, but not the N-terminal of NPM2. CONCLUSION Our results suggest that the chromium induces CA via inhibiting the binding between TMOD2 and NPM2 as well as the dissociation of NPM2 from centrosomes. AVAILABILITY OF DATA AND MATERIALS The data and materials are available from the corresponding authors.
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Affiliation(s)
- Meng Lu Zhao
- Institute of Biomedical Sciences and School of Life Sciences, Jiangsu Normal University, Jiangsu 221112, PR China
| | - Jia Xin Wang
- Institute of Biomedical Sciences and School of Life Sciences, Jiangsu Normal University, Jiangsu 221112, PR China
| | - Xue Kai Bian
- Institute of Biomedical Sciences and School of Life Sciences, Jiangsu Normal University, Jiangsu 221112, PR China
| | - Jun Zhang
- Institute of Biomedical Sciences and School of Life Sciences, Jiangsu Normal University, Jiangsu 221112, PR China
| | - Ya Wen Han
- Institute of Biomedical Sciences and School of Life Sciences, Jiangsu Normal University, Jiangsu 221112, PR China
| | - Si Xian Xu
- Institute of Biomedical Sciences and School of Life Sciences, Jiangsu Normal University, Jiangsu 221112, PR China
| | - Shao Chin Lee
- Institute of Biomedical Sciences and School of Life Sciences, Jiangsu Normal University, Jiangsu 221112, PR China.
| | - Ji Zhong Zhao
- Institute of Biomedical Sciences and School of Life Sciences, Jiangsu Normal University, Jiangsu 221112, PR China.
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Islam S, Kamila S, Chattopadhyay A. Toxic and carcinogenic effects of hexavalent chromium in mammalian cells in vivo and in vitro: a recent update. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, TOXICOLOGY AND CARCINOGENESIS 2023; 40:282-315. [PMID: 36728911 DOI: 10.1080/26896583.2022.2158675] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Chromium VI (Cr (VI)) can cross cell membranes readily and causes the formation of Cr-DNA adducts, genomic damages, elevation of reactive oxygen species (ROS) and alteration of survival signaling pathways, as evidenced by the modulation in p53 signaling pathway. Mammals, including humans are exposed to Cr, including Cr (VI), frequently through inhalation, drinking water, and food. Several studies demonstrated that Cr (VI) induces cellular death through apoptosis and autophagy, genotoxicity, functional alteration of mitochondria, endocrine and reproductive impairments. In the present review, studies on deleterious effects of Cr (VI) exposure to mammalian cells (in vivo and in vitro) have been documented. Special attention is paid to the underlying molecular mechanism of Cr (VI) toxicity.
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Affiliation(s)
- Shehnaz Islam
- Department of Zoology, Visva-Bharati, Santiniketan, West Bengal, India
| | - Sreejata Kamila
- Department of Zoology, Visva-Bharati, Santiniketan, West Bengal, India
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Luo S, Zhang C, Gao Z, Jiang L, Li Q, Shi X, Kong Y, Cao J. ER stress-enhanced HMGA2 plays an important role in Cr (VI)-induced glycolysis and inhibited oxidative phosphorylation by targeting the transcription of ATF4. Chem Biol Interact 2023; 369:110293. [PMID: 36473502 DOI: 10.1016/j.cbi.2022.110293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 11/11/2022] [Accepted: 11/28/2022] [Indexed: 12/07/2022]
Abstract
Hexavalent chromium [Cr (VI)] is a proven human carcinogen which is widely used in steel manufacturing and painting. Here, the involvement of high mobility group A2 (HMGA2) in Cr (VI)-mediated glycolysis and oxidative phosphorylation (OXPHOS) was investigated. First, Cr (VI) treatment induced aerobic glycolysis by increasing the expression of GLUT1, HK II, PKM2 and LDHA enzymes, and reduced OXPHOS by decreasing mitochondrial mass, the expression of COX IV and ND1, and increasing Ca2+ content in mitochondria in A549 and HELF cells. And overexpression of HMGA2 induced aerobic glycolysis and decreased OXPHOS. Secondly, using endoplasmic reticulum (ER) stress inhibitor, 4-phenylbutyric acid (4-PBA) and knockdown of activating transcription factor 4 (ATF4) gene by siRNA, we demonstrated that ER stress and ATF4 elevation mediated Cr (VI)-induced glycolysis and inhibited OXPHOS. Furthermore, using tunicamycin (Tm), siHMGA2, transfection of HMGA2 and siATF4, we demonstrated that ER stress-enhanced interaction of HMGA2 and ATF4 resulted in Cr (VI)-induced glycolysis and inhibited OXPHOS. Additionally, ChIP assay revealed that HMGA2 protein could directly bind to the promoter sequence of ATF4 gene, which modulated Cr (VI)-induced ATF4 elevation. Finally, in lung tissues of BALB/c mice injected with HMGA2 plasmids, it is verified that HMGA2 involved in regulation of ATF4, glycolysis and OXPHOS in vivo. Combining, our data discovered that ER stress-enhanced the interaction of HMGA2 and ATF4 played an important role in Cr (VI)-mediated glycolysis and OXPHOS. These results imply a root cause for the carcinogenicity of Cr (VI), and could guide development of novel therapeutics for cancers.
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Affiliation(s)
- Shengxiang Luo
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian, 116044, China
| | - Cong Zhang
- Department of Food Nutrition and Safety, Dalian Medical University, Dalian, 116044, China
| | - Zeyun Gao
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian, 116044, China
| | - Liping Jiang
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian, 116044, China
| | - Qiujuan Li
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian, 116044, China
| | - Xiaoxia Shi
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian, 116044, China
| | - Ying Kong
- Department of Biochemistry and Molecular Biology, Dalian Medical University, Dalian, 116044, China.
| | - Jun Cao
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian, 116044, China.
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Zhang Z, Zheng P, Qi C, Cui Y, Qi Y, Xue K, Yan G, Liu J. Platycodon grandiflorus Polysaccharides Alleviate Cr(VI)-Induced Apoptosis in DF-1 Cells via ROS-Drp1 Signal Pathway. LIFE (BASEL, SWITZERLAND) 2022; 12:life12122144. [PMID: 36556509 PMCID: PMC9788446 DOI: 10.3390/life12122144] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/20/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
Hexavalent chromium (Cr(VI)) is a widespread heavy metal that has been identified as a human carcinogen, and acute or chronic exposure to Cr(VI) can cause organ damage. Platycodon grandiflorus polysaccharide (PGPS) is a constituent extracted from the Chinese herb Platycodon grandiflorus, which has various pharmacological effects. Therefore, the author investigated the role of PGPSt in Cr(VI)-induced apoptosis in chicken embryo fibroblast cell lines (DF-1 cells). Firstly, this study infected DF-1 cells using Cr(VI) to set up a model for cytotoxicity and then added PGPSt. Then, the intracellular reactive oxygen species (ROS), mitochondrial membrane potential (MMP), and apoptosis rate were evaluated. The results showed that PGPSt could inhibit Cr(VI)-induced mitochondrial damage and increase the apoptosis rate. For further exploration of the mechanism of regulation of PGPSt, the ROS-Drp1 pathway was investigated. The antioxidant N-acetyl-L-cysteine (NAC) and mitochondrial division inhibitor 1(Mdivi-1) were added, respectively. The results showed that the NAC and Mdivi-1 restored abnormal mitochondrial fission and cell apoptosis. Thus, PGPSt can alleviate Cr(VI)-induced apoptosis of DF-1 cells through the ROS-Drp1 signaling pathway, which may suggest new research ideas for developing new drugs to alleviate Cr(VI) toxicity.
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Affiliation(s)
- Zhuanglong Zhang
- College of Veterinary Medicine, Shandong Agricultural University, Tai’an 271018, China
| | - Pimiao Zheng
- Research Center for Animal Disease Control Engineering, Shandong Agricultural University, Tai’an 271018, China
| | - Changxi Qi
- College of Veterinary Medicine, Shandong Agricultural University, Tai’an 271018, China
| | - Yuehui Cui
- College of Veterinary Medicine, Shandong Agricultural University, Tai’an 271018, China
| | - Yijian Qi
- Research Center for Animal Disease Control Engineering, Shandong Agricultural University, Tai’an 271018, China
| | - Kun Xue
- Research Center for Animal Disease Control Engineering, Shandong Agricultural University, Tai’an 271018, China
| | - Guangwei Yan
- Research Center for Animal Disease Control Engineering, Shandong Agricultural University, Tai’an 271018, China
| | - Jianzhu Liu
- College of Veterinary Medicine, Shandong Agricultural University, Tai’an 271018, China
- Correspondence: ; Tel.: +86-538-8246287; Fax: +86-538-8241419
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7
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Krawic C, Zhitkovich A. Chemical mechanisms of DNA damage by carcinogenic chromium(VI). ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2022; 96:25-46. [PMID: 36858775 PMCID: PMC10069994 DOI: 10.1016/bs.apha.2022.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Hexavalent chromium is a firmly established human carcinogen with documented exposures in many professional groups. Environmental exposure to Cr(VI) is also a significant public health concern. Cr(VI) exists in aqueous solutions as chromate anion that is unreactive with DNA and requires reductive activation inside the cells to produce genotoxic and mutagenic effects. Reduction of Cr(VI) in cells is nonenzymatic and in vivo principally driven by ascorbate with a secondary contribution from nonprotein thiols glutathione and cysteine. In addition to its much faster rate of reduction, ascorbate-driven metabolism avoids the formation of Cr(V) which is the first intermediate in Cr(VI) reduction by thiols. The end-product of Cr(VI) reduction is Cr(III) which forms several types of Cr-DNA adducts that are collectively responsible for all mutagenic and genotoxic effects in Cr(VI) reactions with ascorbate and thiols. Some Cr(V) forms can react with H2O2 to produce DNA-oxidizing peroxo species although this genotoxic pathway is suppressed in cells with physiological levels of ascorbate. Chemical reactions of Cr(VI) with ascorbate or thiols lack directly DNA-oxidizing metabolites. The formation of oxidative DNA breaks in early studies of these reactions was caused by iron contamination. Production of Cr(III)-DNA adducts in cells showed linear dose-dependence irrespective of the predominant reduction pathway and their processing by mismatch repair generated more toxic secondary genetic lesions in euchromatin. Overall, Cr(III)-DNA adduction is the dominant pathway for the formation of genotoxic and mutagenic DNA damage by carcinogenic Cr(VI).
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Affiliation(s)
- Casey Krawic
- Department of Pathology and Laboratory Medicine, Legorreta Cancer Center, Brown University, Providence, RI, United States
| | - Anatoly Zhitkovich
- Department of Pathology and Laboratory Medicine, Legorreta Cancer Center, Brown University, Providence, RI, United States.
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Nagababu A, Reddy DS, Mohan GK. Toxic chrome removal from industrial effluents using marine algae: Modeling and optimization. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.07.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Katsayal BS, Sallau AB, Muhammad A. Kinetics and thermodynamics of Cr (VI) reduction by Tamarindus indica methanol leaves extract under optimized reaction conditions. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2022. [DOI: 10.1186/s43088-022-00233-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
AbstractEnvironmental contamination with Cr (VI) has recently attracted public attention because of its high concentration in soil and wastewater originating majorly from anthropogenic activities and natural processes. Reduction of Cr (VI) to Cr (III) is a feasible method for minimizing chromium pollution. This work aimed at characterizing the effects of Cr (VI) reduction conditions in a batch experiment such as temperature, hydrogen ion concentration, time, and reactant concentrations, as well as kinetics and thermodynamics of the reaction using Tamarindus indica methanol leaves extract as a reductant. Cr (VI) reduction was meaningfully affected by temperature, hydrogen ion concentration, reaction time, and reactant concentrations. The reaction followed the pseudo-second-order kinetic model (R2 = 0.997) at pH of 2; at the neutral and alkaline pH (7 and 9), the reaction predominantly obeyed first order (R2 = 0.988) and pseudo-first order (R2 = 0.758), respectively. Under various hydrogen ion concentrations, the reaction retains negative free energies, enthalpy change, and a positive entropy. The findings from this study suggested the reaction to be spontaneous, exothermic, and orderly unstable. We concluded that phytocompounds present in tamarind methanol leaves extract demonstrated a strong potentials for converting Cr (VI) to Cr (III) and, thus, could be applicable in Cr (VI) contaminated wastewater treatment.
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Olmedo-Suárez MÁ, Ramírez-Díaz I, Pérez-González A, Molina-Herrera A, Coral-García MÁ, Lobato S, Sarvari P, Barreto G, Rubio K. Epigenetic Regulation in Exposome-Induced Tumorigenesis: Emerging Roles of ncRNAs. Biomolecules 2022; 12:513. [PMID: 35454102 PMCID: PMC9032613 DOI: 10.3390/biom12040513] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/18/2022] [Accepted: 03/21/2022] [Indexed: 02/06/2023] Open
Abstract
Environmental factors, including pollutants and lifestyle, constitute a significant role in severe, chronic pathologies with an essential societal, economic burden. The measurement of all environmental exposures and assessing their correlation with effects on individual health is defined as the exposome, which interacts with our unique characteristics such as genetics, physiology, and epigenetics. Epigenetics investigates modifications in the expression of genes that do not depend on the underlying DNA sequence. Some studies have confirmed that environmental factors may promote disease in individuals or subsequent progeny through epigenetic alterations. Variations in the epigenetic machinery cause a spectrum of different disorders since these mechanisms are more sensitive to the environment than the genome, due to the inherent reversible nature of the epigenetic landscape. Several epigenetic mechanisms, including modifications in DNA (e.g., methylation), histones, and noncoding RNAs can change genome expression under the exogenous influence. Notably, the role of long noncoding RNAs in epigenetic processes has not been well explored in the context of exposome-induced tumorigenesis. In the present review, our scope is to provide relevant evidence indicating that epigenetic alterations mediate those detrimental effects caused by exposure to environmental toxicants, focusing mainly on a multi-step regulation by diverse noncoding RNAs subtypes.
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Affiliation(s)
- Miguel Ángel Olmedo-Suárez
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Licenciatura en Médico Cirujano, Universidad de la Salud del Estado de Puebla (USEP), Puebla 72000, Mexico
| | - Ivonne Ramírez-Díaz
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Facultad de Biotecnología, Campus Puebla, Universidad Popular Autónoma del Estado de Puebla (UPAEP), Puebla 72410, Mexico
| | - Andrea Pérez-González
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Licenciatura en Médico Cirujano, Universidad de la Salud del Estado de Puebla (USEP), Puebla 72000, Mexico
| | - Alejandro Molina-Herrera
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Licenciatura en Médico Cirujano, Universidad de la Salud del Estado de Puebla (USEP), Puebla 72000, Mexico
| | - Miguel Ángel Coral-García
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Decanato de Ciencias de la Salud, Campus Puebla, Universidad Popular Autónoma del Estado de Puebla (UPAEP), Puebla 72410, Mexico
| | - Sagrario Lobato
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Licenciatura en Médico Cirujano, Universidad de la Salud del Estado de Puebla (USEP), Puebla 72000, Mexico
| | - Pouya Sarvari
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
| | - Guillermo Barreto
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Laboratoire IMoPA, CNRS, Université de Lorraine, UMR 73635 Nancy, France
- Lung Cancer Epigenetic, Max-Planck-Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Karla Rubio
- International Laboratory EPIGEN, Consejo de Ciencia y Tecnología del Estado de Puebla (CONCYTEP), Puebla 72160, Mexico; (M.Á.O.-S.); (I.R.-D.); (A.P.-G.); (A.M.-H.); (M.Á.C.-G.); (S.L.); (P.S.); (G.B.)
- Licenciatura en Médico Cirujano, Universidad de la Salud del Estado de Puebla (USEP), Puebla 72000, Mexico
- Laboratoire IMoPA, CNRS, Université de Lorraine, UMR 73635 Nancy, France
- Lung Cancer Epigenetic, Max-Planck-Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
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11
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Chappell GA, Wolf JC, Thompson CM. Crypt and Villus Transcriptomic Responses in Mouse Small Intestine Following Oral Exposure to Hexavalent Chromium. Toxicol Sci 2022; 186:43-57. [PMID: 34935971 PMCID: PMC8883354 DOI: 10.1093/toxsci/kfab152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Oral exposure to hexavalent chromium (Cr(VI)) induces tumors in the mouse duodenum. Previous microarray-based transcriptomic analyses of homogenized mouse duodenal tissue have demonstrated Cr(VI)-induced alterations in various cellular pathways and processes. However, X-ray fluorescence microscopy indicates that chromium localizes primarily to the duodenal villi following exposure to Cr(VI), suggesting that previous transcriptomic analyses of homogenized tissue provide an incomplete picture of transcriptomic responses in the duodenum. Herein, transcriptomic analyses were conducted separately on crypt and villus tissue from formalin-fixed paraffin-embedded transverse duodenal sections from the same study in which microarray-based analyses were previously conducted. A total of 28 groups (7 doses × 2 timepoints × 2 tissue compartments) were analyzed for differential gene expression, dose-response, and gene set enrichment. Tissue compartment isolation was confirmed by differences in expression of typical markers of crypt and villus compartments. Fewer than 21 genes were altered in the crypt compartment of mice exposed to 0.1-5 ppm Cr(VI) for 7 or 90 days, which increased to hundreds or thousands of genes at ≥20 ppm Cr(VI). Consistent with histological evidence for crypt proliferation, a significant, dose-dependent increase in genes that regulate mitotic cell cycle was prominent in the crypt, while subtle in the villus, when compared with samples from time-matched controls. Minimal transcriptomic evidence of DNA damage response in either the crypts or the villi is consistent with published in vivo genotoxicity data. These results are also discussed in the context of modes of action that have been proposed for Cr(VI)-induced small intestine tumors in mice.
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Kazemi A, Esmaeilbeigi M, Sahebi Z, Ansari A. Health risk assessment of total chromium in the qanat as historical drinking water supplying system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 807:150795. [PMID: 34653467 DOI: 10.1016/j.scitotenv.2021.150795] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
This study investigated the health risk assessment of total chromium (CrT) in qanats of South Khorasan, Eastern Iran. For this, concentration of CrT in a total of 83 qanats were measured in summer 2020. Samples were initially tested in the field for temperature, pH, dissolved oxygen (DO), electrical conductivity (EC), and total dissolved solids (TDS). In the lab, collected samples were filtered and fixed with nitric acid (HNO3) for the detection of CrT using inductively coupled plasma mass spectrometry (ICP-MS). Hazard quotient (HQ) and carcinogenic risk assessments were considered to evaluate the risks of CrT to inhabitants. Results showed that concentration of CrT ranged from 1.79 to 1017.05 μg L-1, and a total of 25 stations illuminated CrT concentrations above the WHO standards (50 μg L-1). HQ demonstrated HQ < 1 for 90.37% of studied samples with negligible hazard, whereas 9.63% of stations illuminated HQ ≥ 1 meaning the presence of non-carcinogenic risk for water consumers. Carcinogenic risk (CR) exhibited CR > 1.00E-04 in 81.93% of qanats while 18.07% of stations had 1.00E-06 < CR < 1.00E-04 meaning no acceptable and acceptable CR for the studied qanats, respectively. Zoning map displayed that qanats in the south of South Khorasan possessed the highest HQ, but north regions showed the lowest ones. Together, CrT in qanats of South Khorasan is above the WHO limit, which results in a high risk of carcinogenicity for residents, and in turn, more efforts should be made to provide hygienic groundwater for consumers.
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Affiliation(s)
- Ali Kazemi
- Department of Environmental Science and Engineering, Faculty of Agriculture and Environment, Arak University, Arak, Iran.
| | - Milad Esmaeilbeigi
- Department of Marine Sciences, Tarbiat Modares University, Noor, Mazandaran, Iran
| | | | - Amir Ansari
- Department of Environmental Science and Engineering, Faculty of Agriculture and Environment, Arak University, Arak, Iran
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Thompson CM, Aardema MJ, Heintz MM, MacGregor JT, Young RR. A review of mammalian in vivo genotoxicity of hexavalent chromium: implications for oral carcinogenicity risk assessment. Crit Rev Toxicol 2022; 51:820-849. [DOI: 10.1080/10408444.2021.2000934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Inferred inactivation of the Cftr gene in the duodena of mice exposed to hexavalent chromium (Cr(VI)) in drinking water supports its tumor-suppressor status and implies its potential role in Cr(VI)-induced carcinogenesis of the small intestines. Toxicol Appl Pharmacol 2021; 433:115773. [PMID: 34688701 DOI: 10.1016/j.taap.2021.115773] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 10/12/2021] [Accepted: 10/19/2021] [Indexed: 12/12/2022]
Abstract
Carcinogenicity of hexavalent chromium [Cr (VI)] has been supported by a number of epidemiological and animal studies; however, its carcinogenic mode of action is still incompletely understood. To identify mechanisms involved in cancer development, we analyzed gene expression data from duodena of mice exposed to Cr(VI) in drinking water. This analysis included (i) identification of upstream regulatory molecules that are likely responsible for the observed gene expression changes, (ii) identification of annotated gene expression data from public repositories that correlate with gene expression changes in duodena of Cr(VI)-exposed mice, and (iii) identification of hallmark and oncogenic signature gene sets relevant to these data. We identified the inactivated CFTR gene among the top scoring upstream regulators, and found positive correlations between the expression data from duodena of Cr(VI)-exposed mice and other datasets in public repositories associated with the inactivation of the CFTR gene. In addition, we found enrichment of signatures for oncogenic signaling, sustained cell proliferation, impaired apoptosis and tissue remodeling. Results of our computational study support the tumor-suppressor role of the CFTR gene. Furthermore, our results support human relevance of the Cr(VI)-mediated carcinogenesis observed in the small intestines of exposed mice and suggest possible groups that may be more vulnerable to the adverse outcomes associated with the inactivation of CFTR by hexavalent chromium or other agents. Lastly, our findings predict, for the first time, the role of CFTR inactivation in chemical carcinogenesis and expand the range of plausible mechanisms that may be operative in Cr(VI)-mediated carcinogenesis of intestinal and possibly other tissues.
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den Braver-Sewradj SP, van Benthem J, Staal YCM, Ezendam J, Piersma AH, Hessel EVS. Occupational exposure to hexavalent chromium. Part II. Hazard assessment of carcinogenic effects. Regul Toxicol Pharmacol 2021; 126:105045. [PMID: 34506880 DOI: 10.1016/j.yrtph.2021.105045] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 08/30/2021] [Accepted: 09/06/2021] [Indexed: 11/18/2022]
Abstract
Hexavalent chromium (Cr(VI)) compounds have been studied extensively and several agencies have described their toxicological profile. In the past, personnel of the Dutch Ministry of Defence may have been exposed to Cr(VI) during maintenance activities on NATO equipment. To investigate if this exposure may have caused irreversible adverse health effects, the Dutch National Institute for Public Health and the Environment (RIVM) summarized all available knowledge from previous evaluations. This information was complemented with a scoping review to retrieve new scientific literature. All scientific evidence was evaluated in workshops with external experts to come to an overview of irreversible adverse health effects that could be caused by occupational exposure to Cr(VI) compounds. This review provides the hazard assessment for occupational exposure to Cr(VI) and carcinogenic effects by integrating and weighting evidence provided by international agencies complemented with newly published studies. It was concluded that occupational exposure to Cr(VI) can cause lung cancer, nose and nasal sinus cancer in humans. Cr(VI) is suspected to cause stomach cancer and laryngeal cancer in humans. It is currently insufficiently clear if Cr(VI) can cause cancer of the small intestine, oral cavity, pancreas, prostate or bladder in humans.
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Affiliation(s)
| | - Jan van Benthem
- National Institute for Public Health and the Environment (RIVM), P.O. Box 1, 3720BA Bilthoven, the Netherlands
| | - Yvonne C M Staal
- National Institute for Public Health and the Environment (RIVM), P.O. Box 1, 3720BA Bilthoven, the Netherlands
| | - Janine Ezendam
- National Institute for Public Health and the Environment (RIVM), P.O. Box 1, 3720BA Bilthoven, the Netherlands
| | - Aldert H Piersma
- National Institute for Public Health and the Environment (RIVM), P.O. Box 1, 3720BA Bilthoven, the Netherlands
| | - Ellen V S Hessel
- National Institute for Public Health and the Environment (RIVM), P.O. Box 1, 3720BA Bilthoven, the Netherlands
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Liang Y, Liang N, Ma Y, Tang S, Ye S, Xiao F. Role of Clusterin/NF-κB in the secretion of senescence-associated secretory phenotype in Cr(VI)-induced premature senescent L-02 hepatocytes. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 219:112343. [PMID: 34020271 DOI: 10.1016/j.ecoenv.2021.112343] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 05/10/2021] [Accepted: 05/12/2021] [Indexed: 06/12/2023]
Abstract
Hexavalent chromium [Cr(VI)] and its compounds have caused serious environmental pollution and health damage. Senescent cells can actively change the surrounding environment by secreting some factors, which are called senescence associated secretory phenotype (SASP). Our previous work has confirmed that premature senescent hepatocytes induced by Cr(VI) expressed high level of Clusterin (CLU) and secrete interleukin-6 (IL-6) and IL-8. CLU is involved in the regulation of tumor development and drug resistance, but whether CLU regulates SASP components and participates in Cr(VI)-induced malignant transformation is unclear. In this study we demonstrated that Cr(VI) induced the secretion of tumor promoting components of SASP such as IL-6, IL-8, and granulocyte-macrophage colony stimulating factor (GM-CSF) in senescent L-02 hepatocytes, while the levels of the anti-tumor components of SASP such as chemokine (c-x-c motif) ligand-1 (CXCL-1) and monocyte chemoattractant protein-1 (MCP-1) were not altered. CLU shRNA interference significantly reduced the levels of IL-6, IL-8, and GM-CSF in the culture medium of senescent cells, suggesting CLU may regulate SASP. The NF-κB inhibitor PDTC significantly alleviated Cr(VI)-induced increase of IL-6, IL-8, and GM-CSF, confirming that NF-κB can regulate the tumor promoting components of SASP. CLU shRNA interference aggravated the inhibitory effect of PDTC on SASP secretion, indicating that CLU regulated the secretion of SASP in Cr(VI)-induced senescent hepatocytes through the NF-κB signaling. We speculated that SASP secreted by Cr(VI)-induced premature senescent hepatocytes was tightly related to the carcinogenic effect of Cr(VI). Therefore, elucidation of upstream regulatory mechanism of SASP is of great significance. In addition to further clarifying the carcinogenic mechanisms associated with Cr(VI), we could also seek out new targets for treatment of Cr(VI)-related cancer.
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Affiliation(s)
- Yuehui Liang
- Xiangya School of Public Health, Central South University, Changsha 410078, PR China
| | - Ningjuan Liang
- Xiangya School of Public Health, Central South University, Changsha 410078, PR China
| | - Yu Ma
- Xiangya School of Public Health, Central South University, Changsha 410078, PR China
| | - Sixuan Tang
- Xiangya School of Public Health, Central South University, Changsha 410078, PR China
| | - Shuzi Ye
- Xiangya School of Public Health, Central South University, Changsha 410078, PR China
| | - Fang Xiao
- Xiangya School of Public Health, Central South University, Changsha 410078, PR China.
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Magnetron Sputtering vs. Electrodeposition for Hard Chrome Coatings: A Comparison of Environmental and Economic Performances. MATERIALS 2021; 14:ma14143823. [PMID: 34300746 PMCID: PMC8307072 DOI: 10.3390/ma14143823] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/30/2021] [Accepted: 07/03/2021] [Indexed: 11/16/2022]
Abstract
The coating of materials with specific films is widely used to improve material properties and many technologies exist to perform it. In the last few years, the replacement of wet electrodeposition processes has been continuously encouraged in the EU due to the problematic waste management linked to those processes. In this paper, magnetron sputtering is studied as an alternative to conventional electrodeposition by comparing the technologies' environmental impacts and costs. From the study, it appears that while magnetron sputtering greatly reduces hexavalent chromium emissions over the production, it has an increased electricity consumption mostly due to its lower production capacity, thus leading to more greenhouse gas emissions. Furthermore, a short discussion on the quantification of the impact of hexavalent chromium emissions is conducted. Regarding costs, the electrodeposition process has a lower cost of investment and of consumables, but requires more work time for the different steps of the process, making the total price per functional unit roughly equal. However, the cost per functional unit strongly depends on assumptions on the required work time, for which a sensitivity study is performed. Finally, the impacts of these two competing coating processes are discussed to complete the technological comparison for the case of hard chromium deposition.
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Melatonin Alleviated Potassium Dichromate-Induced Oxidative Stress and Reprotoxicity in Male Rats. BIOMED RESEARCH INTERNATIONAL 2021; 2021:3565360. [PMID: 34222468 PMCID: PMC8221856 DOI: 10.1155/2021/3565360] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 04/07/2021] [Accepted: 05/27/2021] [Indexed: 01/24/2023]
Abstract
Melatonin (ML) is a potent antioxidant that reduces oxidative stress. This study was designed to examine the protective effect of melatonin on potassium dichromate- (PDC-) induced male reproductive toxicity. Forty rats were divided into five groups: the control group, rats administered PDC orally (10 mg/kg body weight) for eight weeks, rats administered ML intraperitoneally at doses of either 2.5 or 5 mg/kg followed by the administration of PDC, and rats administered 5 mg/kg ML only. The treatment of rats with PDC led to a decrease in the levels of plasma sex hormones, glutathione, superoxide dismutase, catalase, carnitine, sperm count, and motility. Testicular malondialdehyde levels, nitric oxide concentrations, and abnormalities increased significantly in the PDC group. Melatonin administration to the PDC-treated rats reduced the increase of malondialdehyde and restored the activity of antioxidant enzymes (superoxide dismutase and catalase), glutathione, and sex hormone levels. Moreover, ML attenuated PDC-induced increase in levels of tumor necrosis factor-alpha or interleukin-6. ML alleviated histopathological changes and an increase of p53-positive immune reaction due to PDC. Furthermore, ML inhibited PDC-induced decrease in the DNA content of spermatogenic cells. This study proposed that melatonin may be useful in mitigating oxidative stress-induced testicular damage due to potassium dichromate toxicity.
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Zhang Z, Costa M. p62 functions as a signal hub in metal carcinogenesis. Semin Cancer Biol 2021; 76:267-278. [PMID: 33894381 DOI: 10.1016/j.semcancer.2021.04.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 04/06/2021] [Accepted: 04/15/2021] [Indexed: 12/13/2022]
Abstract
A number of metals are toxic and carcinogenic to humans. Reactive oxygen species (ROS) play an important role in metal carcinogenesis. Oxidative stress acts as the converging point among various stressors with ROS being the main intracellular signal transducer. In metal-transformed cells, persistent expression of p62 and erythroid 2-related factor 2 (Nrf2) result in apoptosis resistance, angiogenesis, inflammatory microenvironment, and metabolic reprogramming, contributing to overall mechanism of metal carcinogenesis. Autophagy, a conserved intracellular process, maintains cellular homeostasis by facilitating the turnover of protein aggregates, cellular debris, and damaged organelles. In addition to being a substrate of autophagy, p62 is also a crucial molecule in a myriad of cellular functions and in molecular events, which include oxidative stress, inflammation, apoptosis, cell proliferation, metabolic reprogramming, that modulate cell survival and tumor growth. The multiple functions of p62 are appreciated by its ability to interact with several key components involved in various oncogenic pathways. This review summarizes the current knowledge and progress in studies of p62 and metal carcinogenesis with emphasis on oncogenic pathways related to oxidative stress, inflammation, apoptosis, and metabolic reprogramming.
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Affiliation(s)
- Zhuo Zhang
- Department of Environmental Medicine, NYU School of Medicine, 341 East 25th Street, New York, NY 10010, USA
| | - Max Costa
- Department of Environmental Medicine, NYU School of Medicine, 341 East 25th Street, New York, NY 10010, USA.
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Katram N, Garlapati PK, Yadavalli C, Methal RE, Rajappa SBG, Raghavan AK. Aegle marmelos extract rich in marmelosin exacted ameliorative effect against chromium-induced oxidative stress and apoptosis through regulation of Gadd45 in HepG2 cell line. J Food Biochem 2021; 45:e13704. [PMID: 33719131 DOI: 10.1111/jfbc.13704] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/03/2021] [Accepted: 03/02/2021] [Indexed: 11/28/2022]
Abstract
Hexavalent chromium [Cr (VI)] is highly toxic compared to other valence states of chromium. In the process of metabolic reduction, Cr (VI) converts to trivalent chromium. Aegle marmelos (Bael), a sacred plant of India and its fruits are being consumed as traditional formulations against various diseases such as ulcer, gastric mucosal damage, inflammations, febrile delirium, acute bronchitis, anxiety, etc. The present study assessed the protective effects of marmelosin (MAR) from Aegle marmelos against K2 Cr2 O7 -induced toxic effects in HepG2 cell line through its antiapoptotic mechanism. Results of the study revealed that pretreatment of MAR ameliorated cell viability, mitochondrial damage, and DNA damage induced by K2 Cr2 O7 in HepG2 cell line as evidenced by cell morphology, MTT, LDH, and MMP assays. Pretreatment of MAR attenuated K2 Cr2 O7 -induced oxidative stress by downregulating intracellular ROS and RNS. Further, pretreatment of MAR significantly downregulated K2 Cr2 O7 -induced apoptotic markers, such as Bax, Caspase 3, and Gadd45. Our results suggested that application of marmelosin could be beneficial in ameliorating chromium-induced apoptotic cell death by suppressing oxidative stress and regulating excessive DNA damage. PRACTICAL APPLICATIONS: The study focused on protective mechanism of marmelosin from Aegle marmelos against chromium-induced oxidative stress for the first time. In this research, we reported that marmelosin effectively ameliorated K2 Cr2 O7 -induced morphological changes such as oxidative stress and apoptotic cell death by regulating Gadd45, Bcl-2, Bax, and Caspase 3 gene expressions, and inhibition of intracellular ROS and RNS. The study provides a better understanding of the pharmacological mechanisms of Aegle marmelos and its bioactive compound, that is, marmelosin in the management of intoxication of heavy metals associated with excessive DNA damage.
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Affiliation(s)
- Navya Katram
- Defence Food Research Laboratory (DFRL), Defence Research and Defence Organization (DRDO), Mysore, India
| | - Phani Kumar Garlapati
- Defence Food Research Laboratory (DFRL), Defence Research and Defence Organization (DRDO), Mysore, India
| | | | - Ramya Edavalath Methal
- Defence Food Research Laboratory (DFRL), Defence Research and Defence Organization (DRDO), Mysore, India
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Chappell GA, Wikoff DS, Thompson CM. Assessment of Mechanistic Data for Hexavalent Chromium-Induced Rodent Intestinal Cancer Using the Key Characteristics of Carcinogens. Toxicol Sci 2021; 180:38-50. [PMID: 33404626 PMCID: PMC7916733 DOI: 10.1093/toxsci/kfaa187] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Oral exposure to hexavalent chromium (Cr[VI]) induces intestinal tumors in mice. Mutagenic and nonmutagenic modes of action (MOAs) have been accepted by different regulatory bodies globally, the latter involving cytotoxicity-induced regenerative cell proliferation. However, concerns persist that all possible MOAs have not been fully considered. To address the potential for alternative MOAs, mechanistic data not represented in the existing two MOAs were evaluated. Relevant data were identified and organized by key characteristics of carcinogens (KCCs); literature related to epigenetics, immunosuppression, receptor-mediated effects, and immortalization were reviewed to identify potential key events associated with an alternative MOA. Over 200 references were screened for these four KCCs and further prioritized based on relevance to the research objective (ie, in vivo, oral exposure, gastrointestinal tissue). Minimal data were available specific to the intestine for these KCCs, and there was no evidence of any underlying mechanisms or key events that are not already represented in the two proposed MOAs. For example, while epigenetic dysregulation of DNA repair genes has been demonstrated, epigenetic effects were not measured in intestinal tissue, and it has been shown that Cr(VI) does not cause DNA damage in intestinal tissue. High-throughput screening data related to the KCCs were also evaluated, with activity generally limited to the two recognized MOAs. Collectively, no plausible alternative MOAs (or key events) were identified in addition to those previously proposed for Cr(VI) small intestine tumors.
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Microbial Mechanisms for Remediation of Hexavalent Chromium and their Large-Scale Applications; Current Research and Future Directions. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2021. [DOI: 10.22207/jpam.15.1.32] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The increase of anthropogenic activities has led to the pollution of the environment by heavy metals, including chromium (Cr). There are two common oxidative states of Cr that can be found in industrial effluents the trivalent chromium Cr(III) and the hexavalent chromium Cr(VI). While the hexavalent chromium Cr(VI) is highly toxic and can trigger serious human health issues, its reduced form, the trivalent chromium Cr(III), is less toxic and insoluble. Leather tanning is an important industry in many developing countries and serves as a major source of Cr(VI) contamination. Globally, tannery factories generate approximately 40 million m3 of Cr-containing wastewater annually. While the physico-chemical treatments of tannery wastewater are not safe, produce toxic chemicals and require large amounts of chemical inputs, bioremediation using chromium-resistant bacteria (CRB) is safer, efficient and does not produce toxic intermediates. Chromium-resistant bacteria (CRB) utilise three mechanisms for Cr(VI) removal: biotransformation, biosorption and bioaccumulation. This review will evaluate the three Cr(VI) detoxification mechanisms used by bacteria, their limitations and assess their applications for large-scale remediation of Cr(VI). This can be helpful for understanding the nature of Cr(VI) remediation mechanisms used by bacteria, therefore, bridging the gap between laboratory findings and industrial application of microorganisms for Cr(VI) removal.
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Bieber VS, Ozcelik E, Cox HJ, Ottley CJ, Ratan JK, Karaman M, Tabakci M, Beaumont SK, Badyal JPS. Capture and Release Recyclable Dimethylaminomethyl-Calixarene Functional Cloths for Point-of-Use Removal of Highly Toxic Chromium Water Pollutants. ACS APPLIED MATERIALS & INTERFACES 2020; 12:52136-52145. [PMID: 33151052 DOI: 10.1021/acsami.0c14772] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Chromium(VI) contamination of drinking water arises from industrial activity wherever there is a lack of environmental legislation enforcement regarding the removal of such pollutants. Although it is possible to remove such harmful metal ions from drinking water through large-scale facilities, there currently exists no safe and simple way to filter chromium(VI) oxoanions at the point of use (which is potentially safer and necessary in remote locations or humanitarian scenarios). High-surface-area cloth substrates have been functionalized with calixarene molecules for the selective capture of aqueous chromium(VI) oxoanions in the presence of structurally similar anions. This is accomplished by pulsed plasmachemical deposition of a linker layer and subsequent functionalization with dimethylaminomethyl-calixarene (5,11,17,23-tetrakis[(dimethylamino)methyl]-25,26,27,28-tetrahydroxycalix[4]arene). Chromium(VI) oxoanions are captured by simply passing polluted water through the functionalized cloth, while other ions not harmful/beneficial to human health remain in the water. These cloth filters are simple to use, highly selective, and easily recyclable-thus making them attractive for point-of-use application in geographic regions lacking appropriate wastewater treatment plants or flawed environmental monitoring systems. Chromium(VI) pollutants have been successfully removed from real-world contaminated industrial wastewater streams using the dimethylaminomethyl-calixarene functionalized cloths.
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Affiliation(s)
- Vera S Bieber
- Chemistry Department, Durham University, Durham DH1 3LE, England, U.K
| | - Egemen Ozcelik
- Chemical Engineering Department, Konya Technical University, Konya 42075, Turkey
| | - Harrison J Cox
- Chemistry Department, Durham University, Durham DH1 3LE, England, U.K
| | | | - Jatinder K Ratan
- Chemical Engineering Department, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar 144011, Punjab, India
| | - Mustafa Karaman
- Chemical Engineering Department, Konya Technical University, Konya 42075, Turkey
| | - Mustafa Tabakci
- Chemical Engineering Department, Konya Technical University, Konya 42075, Turkey
| | - Simon K Beaumont
- Chemistry Department, Durham University, Durham DH1 3LE, England, U.K
| | - Jas Pal S Badyal
- Chemistry Department, Durham University, Durham DH1 3LE, England, U.K
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Bhat VS, Cohen SM, Gordon EB, Wood CE, Cullen JM, Harris MA, Proctor DM, Thompson CM. An adverse outcome pathway for small intestinal tumors in mice involving chronic cytotoxicity and regenerative hyperplasia: a case study with hexavalent chromium, captan, and folpet. Crit Rev Toxicol 2020; 50:685-706. [PMID: 33146058 DOI: 10.1080/10408444.2020.1823934] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Small intestinal (SI) tumors are relatively uncommon outcomes in rodent cancer bioassays, and limited information regarding chemical-induced SI tumorigenesis has been reported in the published literature. Herein, we propose a cytotoxicity-mediated adverse outcome pathway (AOP) for SI tumors by leveraging extensive target species- and site-specific molecular, cellular, and histological mode of action (MOA) research for three reference chemicals, the fungicides captan and folpet and the transition metal hexavalent chromium (Cr(VI)). The gut barrier functions through highly efficient homeostatic regulation of SI epithelial cell sloughing, regenerative proliferation, and repair, which involves the replacement of up to 1011 cells per day. This dynamic turnover in the SI provides a unique local environment for a cytotoxicity mediated AOP/MOA. Upon entering the duodenum, cytotoxicity to the villous epithelium is the molecular initiating event, as indicated by crypt elongation, villous atrophy/blunting, and other morphologic changes. Over time, the regenerative capacity of the gut epithelium to compensate declines as epithelial loss accelerates, especially at higher exposures. The first key event (KE), sustained regenerative crypt proliferation/hyperplasia, requires sufficient durations, likely exceeding 6 or 12 months, due to extensive repair capacity, to create more opportunities for the second KE, spontaneous mutation/transformation, ultimately leading to proximal SI tumors. Per OECD guidance, biological plausibility, essentiality, and empirical support were assessed using modified Bradford Hill considerations. The weight-of-evidence also included a lack of induced mutations in the duodenum after up to 90 days of Cr(VI) or captan exposure. The extensive evidence for this AOP, along with the knowledge that human exposures are orders of magnitude below those associated with KEs in this AOP, supports its use for regulatory applications, including hazard identification and risk assessment.
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Affiliation(s)
| | - Samuel M Cohen
- Havlik-Wall Professor of Oncology, Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA
| | | | - Charles E Wood
- Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield, CT, USA
| | - John M Cullen
- North Carolina State University, Raleigh, NC, USA.,EPL, Inc., Sterling, VA, USA
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Kojima Y, Machida YJ. DNA-protein crosslinks from environmental exposure: Mechanisms of formation and repair. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2020; 61:716-729. [PMID: 32329115 PMCID: PMC7575214 DOI: 10.1002/em.22381] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 04/08/2020] [Accepted: 04/15/2020] [Indexed: 05/19/2023]
Abstract
Many environmental carcinogens cause DNA damage, which can result in mutations and other alterations in genomic DNA if not repaired promptly. Because of the bulkiness of the lesions, DNA-protein crosslinks (DPCs) are one of the types of toxic DNA damage with potentially deleterious consequences. Despite the importance of DPCs, how cells remove these complex DNA adducts has been incompletely understood. However, major progress in the DPC repair field over the past 5 years now supports the view that cells are equipped with multiple mechanisms to cope with DPCs. Here, we first provide an overview of environmental substances that induce DPCs, describing the sources of exposure and mechanisms of DPC formation. We then review current models of DPC repair and discuss their significance for environmental carcinogens.
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Affiliation(s)
- Yusuke Kojima
- Department of Oncology, Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905, USA
| | - Yuichi J. Machida
- Department of Oncology, Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905, USA
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905, USA
- Correspondence to Yuichi J. Machida.
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ATF4-mediated autophagy-dependent glycolysis plays an important role in attenuating apoptosis induced by Cr (VI) in A549 cells. Toxicol Lett 2020; 331:178-187. [PMID: 32569804 DOI: 10.1016/j.toxlet.2020.06.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 05/26/2020] [Accepted: 06/18/2020] [Indexed: 12/12/2022]
Abstract
Chromium (Cr) (VI) compounds are known to be serious toxic and carcinogenic, but the mechanism is not clear. In our previous study, we found that Cr (VI)-induced ER stress plays an important role in the crosstalk between apoptosis and autophagy, while autophagy was apoptosis-dependent and subsequently prevents apoptosis cell death to keep A549 cells resistant to Cr (VI)-induced toxicity. In this study, we found that Cr (VI) could induce aerobic glycolysis in A549 cells. Both ER stress inhibitor, phenylbutyric acid (4-PBA) and the inhibitor of autophagy, 3-MA, repressed Cr (VI)-induced glycolysis, indicating that both ER stress and autophagy were involved in Cr (VI)-induced glycolysis in A549 cells. Co-treatment of the inhibitor of aerobic glycolysis, 2-DG and Cr (VI) for 24 h increased Cr (VI)-induced cleaved caspase-3, caspase-9 and the number of apoptotic cells, demonstrating that aerobic glycolysis played an important role in attenuating Cr (VI)-induced apoptosis. Furthermore, knockdown of ATF4 by siATF4 significantly decreased Cr (VI)-induced aerobic glycolysis and apoptosis, suggesting that ATF4 was involved in Cr (VI)-induced aerobic glycolysis and its effect of attenuating apoptosis in A549 cells. Taken together, our results demonstrated that autophagy-dependent glycolysis played a role in attenuating Cr (VI)-induced apoptosis. ER stress was involved in facilitating glycolysis, whose induction was mediated by ATF4. These findings open a window for the development of therapeutic interventions to prevent Cr (VI)-induced toxicity.
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Wang G, Zhang C, Huang B. Transcriptome analysis and histopathological observations of Geloina erosa gills upon Cr(VI) exposure. Comp Biochem Physiol C Toxicol Pharmacol 2020; 231:108706. [PMID: 31927119 DOI: 10.1016/j.cbpc.2020.108706] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 12/09/2019] [Accepted: 12/21/2019] [Indexed: 10/25/2022]
Abstract
The heavy metal contamination like Cr(VI) has been increased by human activities and that threats the ecosystem health of mangrove areas. Bioindicator is an emerging tool in the environmental contamination assessment. The objective of this study was to investigate the Geloina erosa response mechanisms and sensitivities of several biomarkers in the Cr(VI) exposure and identify the G. erosa capability of being used as heavy metals bioindicator. In this study, G. erosa was exposed to 100 μmol·L-1 Cr(VI) for 48 h. After transcriptome sequencing, a total of 134,817 unigenes were obtained, including 12,555 up-regulated and 18,829 down-regulated differentially expressed genes and were validated through quantitative real-time PCR. In addition, a total of 12,185 SSRs and 1,428,214 candidate SNPs were identified from all the G. erosa transcriptome libraries. Histopathology of the gill indicated the Cr(VI) exposure induced damage of the organ leading to its immunization, detoxification or apoptosis reactions. Among eight genes of the selected biomarkers, Calm, HSP70, CYP450, ATG5, TLR2, MYD88 and CASP8 were up-regulated, while TLR4 was down-regulated in response to the Cr(VI) exposure.
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Affiliation(s)
- Gongsi Wang
- College of Marine Sciences, Hainan University, Haikou, Hainan 570228,PR China; Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Haikou, Hainan 570228, PR China; Key Laboratory of Tropical Biological Resources in Hainan University, Haikou, Hainan 570228, PR China
| | - Chengkai Zhang
- College of Marine Sciences, Hainan University, Haikou, Hainan 570228,PR China; Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Haikou, Hainan 570228, PR China; Key Laboratory of Tropical Biological Resources in Hainan University, Haikou, Hainan 570228, PR China
| | - Bo Huang
- College of Marine Sciences, Hainan University, Haikou, Hainan 570228,PR China; Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Haikou, Hainan 570228, PR China; Key Laboratory of Tropical Biological Resources in Hainan University, Haikou, Hainan 570228, PR China.
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Mihai O, Kawamoto MS, LeBlanc KL, Grinberg P, Nogueira ARDA, Mester Z. Determination of chromium picolinate and trace hexavalent chromium in multivitamins and supplements by HPLC-ICP-QQQ-MS. J Food Compost Anal 2020. [DOI: 10.1016/j.jfca.2020.103421] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Zhang Y, Ma Y, Liang N, Liang Y, Lu C, Xiao F. Blockage of ROS-ERK-DLP1 signaling and mitochondrial fission alleviates Cr(VI)-induced mitochondrial dysfunction in L02 hepatocytes. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 186:109749. [PMID: 31622878 DOI: 10.1016/j.ecoenv.2019.109749] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/23/2019] [Accepted: 10/01/2019] [Indexed: 06/10/2023]
Abstract
Hexavalent chromium [Cr(VI)] is a common heavy metal pollutant widely used in various industrial fields. It is well known that mitochondria are the most vulnerable targets of heavy metals, but the key molecule/event that directly mediated mitochondrial dysfunction after Cr(VI) exposure is still unclear. The present study was aimed to explore whether Cr(VI) exposure could affect the mitochondrial fission/fusion process, and whether the related abnormal mitochondrial dynamics have been implicated in Cr(VI)-induced mitochondrial dysfunction. We found that the mitochondrial dysfunction caused by Cr(VI) exposure was characterized by decreased mitochondrial respiratory chain complex (MRCC) I/II activities and levels, collapsed mitochondrial membrane potential (MMP), depleted ATP, and increased reactive oxygen species (ROS) level. Cr(VI) induced abnormal mitochondrial fission/fusion events, the antioxidant Nacetyl-L-cysteine (NAC) restored the abnormal mitochondrial function as well as the fission/fusion dynamics. ROS was the up-stream regulator of extracellular regulated protein kinases (ERK) signaling, and the application of a specific ERK1/2 inhibitor PD98059 confirmed that activation of ERK1/2 signaling was associated with the abnormal mitochondrial fission/fusion and mitochondrial dysfunction. We also demonstrated that treatment with dynamic-like protein 1 (DLP1)-siRNA rescued mitochondrial dysfunction in Cr(VI)-exposed L02 hepatocytes. We reached the conclusion that blockage of ROS-ERK-DLP1 signaling and mitochondrial fission alleviates Cr(VI)-induced mitochondrial dysfunction in L02 hepatocytes, which may provide the new avenue for developing effective strategies to protect against Cr(VI)-induced hepatotoxicity.
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Affiliation(s)
- Yujing Zhang
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, Changsha, 410078, PR China
| | - Yu Ma
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, Changsha, 410078, PR China
| | - Ningjuan Liang
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, Changsha, 410078, PR China
| | - Yuehui Liang
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, Changsha, 410078, PR China
| | - Chan Lu
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, Changsha, 410078, PR China
| | - Fang Xiao
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, Changsha, 410078, PR China.
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Wang Z, Lin HP, Li Y, Tao H, Yang P, Xie J, Maddy D, Kondo K, Yang C. Chronic Hexavalent Chromium Exposure Induces Cancer Stem Cell-Like Property and Tumorigenesis by Increasing c-Myc Expression. Toxicol Sci 2019; 172:252-264. [PMID: 31504995 PMCID: PMC6876261 DOI: 10.1093/toxsci/kfz196] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Hexavalent chromium [Cr(VI)] is one of the most common environmental carcinogen causing lung cancer in humans; however, the mechanism of Cr(VI) carcinogenesis remains elusive. Cancer stem cells (CSCs) are considered as cancer initiating and maintaining cells. Ours and other recent studies showed that chronic Cr(VI) exposure induces CSC-like property representing an important mechanism of Cr(VI) carcinogenesis. However, how Cr(VI) exposure induces CSC-like property remains largely unknown. In this study, we found that stably knocking down the expression of c-Myc, a proto-oncogene and one of key stemness factors playing critical roles in cancer initiation and progression, in Cr(VI)-transformed human bronchial epithelial cells [BEAS-2B-Cr(VI)] significantly decreased their CSC-like property and tumorigenicity in mice. Moreover, stably knocking down c-Myc expression in parental nontransformed BEAS-2B cells significantly impaired the capability of chronic Cr(VI) exposure to induce CSC-like property and cell transformation. It was also found that stably overexpressing c-Myc alone in parental nontransformed BEAS-2B cells is capable of causing CSC-like property and cell transformation. Mechanistic studies showed that chronic Cr(VI) exposure increases c-Myc expression by down-regulating the level of microRNA-494 (miR-494). It was further determined that overexpressing miR-494 significantly reduces Cr(VI)-induced CSC-like property, cell transformation, and tumorigenesis mainly through down-regulating c-Myc expression. Together, these findings indicate that chronic low dose Cr(VI) exposure induces CSC-like property and tumorigenesis by increasing c-Myc expression through down-regulating the level of miR-494, revealing an important role of the proto-oncogene c-Myc in Cr(VI) carcinogenesis.
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Affiliation(s)
- Zhishan Wang
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
| | - Hsuan-Pei Lin
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
| | - Yunfei Li
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
| | - Hua Tao
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
| | - Ping Yang
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
- School of Public Health, Guangzhou Medical University, Guangzhou, Guangdong 511436, P.R. China
| | - Jie Xie
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
- School of Health Sciences, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Drew Maddy
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
| | - Kazuya Kondo
- Department of Oncological Medical Services, Graduate School of Biomedical Sciences, Tokushima University Graduate School, Tokushima City 770-8509, Japan
| | - Chengfeng Yang
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
- Center for Research on Environmental Disease, University of Kentucky College of Medicine, Lexington, Kentucky 40536
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Wang Z, Lin HP, Li Y, Tao H, Yang P, Xie J, Maddy D, Kondo K, Yang C. Chronic Hexavalent Chromium Exposure Induces Cancer Stem Cell-Like Property and Tumorigenesis by Increasing c-Myc Expression. Toxicol Sci 2019. [PMID: 31504995 DOI: 10.1093/toxsci/kfzl96] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023] Open
Abstract
Hexavalent chromium [Cr(VI)] is one of the most common environmental carcinogen causing lung cancer in humans; however, the mechanism of Cr(VI) carcinogenesis remains elusive. Cancer stem cells (CSCs) are considered as cancer initiating and maintaining cells. Ours and other recent studies showed that chronic Cr(VI) exposure induces CSC-like property representing an important mechanism of Cr(VI) carcinogenesis. However, how Cr(VI) exposure induces CSC-like property remains largely unknown. In this study, we found that stably knocking down the expression of c-Myc, a proto-oncogene and one of key stemness factors playing critical roles in cancer initiation and progression, in Cr(VI)-transformed human bronchial epithelial cells [BEAS-2B-Cr(VI)] significantly decreased their CSC-like property and tumorigenicity in mice. Moreover, stably knocking down c-Myc expression in parental nontransformed BEAS-2B cells significantly impaired the capability of chronic Cr(VI) exposure to induce CSC-like property and cell transformation. It was also found that stably overexpressing c-Myc alone in parental nontransformed BEAS-2B cells is capable of causing CSC-like property and cell transformation. Mechanistic studies showed that chronic Cr(VI) exposure increases c-Myc expression by down-regulating the level of microRNA-494 (miR-494). It was further determined that overexpressing miR-494 significantly reduces Cr(VI)-induced CSC-like property, cell transformation, and tumorigenesis mainly through down-regulating c-Myc expression. Together, these findings indicate that chronic low dose Cr(VI) exposure induces CSC-like property and tumorigenesis by increasing c-Myc expression through down-regulating the level of miR-494, revealing an important role of the proto-oncogene c-Myc in Cr(VI) carcinogenesis.
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Affiliation(s)
- Zhishan Wang
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
| | - Hsuan-Pei Lin
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
| | - Yunfei Li
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
| | - Hua Tao
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
| | - Ping Yang
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
- School of Public Health, Guangzhou Medical University, Guangzhou, Guangdong 511436, P.R. China
| | - Jie Xie
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
- School of Health Sciences, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Drew Maddy
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
| | - Kazuya Kondo
- Department of Oncological Medical Services, Graduate School of Biomedical Sciences, Tokushima University Graduate School, Tokushima City 770-8509, Japan
| | - Chengfeng Yang
- Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, Kentucky 40536
- Center for Research on Environmental Disease, University of Kentucky College of Medicine, Lexington, Kentucky 40536
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Lin CH, Lai CH, Peng YP, Wu PC, Chuang KY, Yen TY, Xiang YK. Comparative health risk of inhaled exposure to organic solvents, toxic metals, and hexavalent chromium from the use of spray paints in Taiwan. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:33906-33916. [PMID: 29974442 DOI: 10.1007/s11356-018-2669-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/26/2018] [Indexed: 06/08/2023]
Abstract
The study investigated the exposure of spray painters to organic solvents, toxic metals, and hexavalent chromium over 21 working days in 2017. The results found these concentrations of 12 VOCs to be below the short-term exposure limit (STEL) established by the US Occupational Safety and Health Administration (OSHA). The mass concentration of total particulate matter (PM) exposure to workers was 20.01 ± 10.78 mg/m3, which exceeds OSHA's permissible exposure level of 15 mg/m3. The mean concentration of the total metals for all particle sizes was 109.1 ± 12.0 μg/m3, and those for lead (496,017.0 ng/m3) and iron (252,123.8 ng/m3) were the highest of metal elements. Significantly, the mean concentrations of Pb and As exceeded OSHA's permissible exposure limits (PELs) of 0.05 and 0.01 mg/m3, respectively. The total hexavalent chromium concentration was 1163.01 ng/m3, and the individual particle sizes (PM1-2.5, PM1, and PM0.25) were strongly and positively correlated with the Cr(VI) concentrations for PM2.5. The study determined that approximately 56.14% of the hexavalent chromium inhaled during the spray-painting process was deposited in the upper respiratory system of the head airway region, followed by the alveolar and tracheobronchial regions, with fractions of 11.93 and 0.05%, respectively. Although the mean ratio of hexavalent chromium to total chromium was only 3.6% for all particle sizes, the cancer risk of the total particles in Cr(VI) (1.6 × 10-3) exceeded the acceptable risk value (10-6). The cancer risks of As and Cr(VI) associated with quasi-ultrafine particles, PM0.5-1, PM1-2.5, and PM> 2.5, also exceeded 10-6. Comparison of the carcinogenicity risk of VOCs and metals suggests that the adverse health effect of inhaled particles on spray-painting workers is more serious than that from VOC exposure.
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Affiliation(s)
- Chia-Hua Lin
- Department of Biotechnology, National Formosa University, Huwei, Yunlin, 63208, Taiwan
| | - Chia-Hsiang Lai
- Department of Safety Health and Environmental Engineering, Central Taiwan University of Science and Technology, Taichung, Taiwan.
| | - Yen-Ping Peng
- Department of Environmental Science and Engineering, Tung Hai University, Taichung, Taiwan
| | - Pei-Chun Wu
- Institute of Safety Health and Environmental Engineering, Central Taiwan University of Science and Technology, Taichung, Taiwan
| | - Kuen-Yuan Chuang
- Department of Safety Health and Environmental Engineering, Central Taiwan University of Science and Technology, Taichung, Taiwan
| | - Ting-Yu Yen
- Institute of Safety Health and Environmental Engineering, Central Taiwan University of Science and Technology, Taichung, Taiwan
| | - Yao-Kai Xiang
- Institute of Safety Health and Environmental Engineering, Central Taiwan University of Science and Technology, Taichung, Taiwan
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Tseng CH, Lee IH, Chen YC. Evaluation of hexavalent chromium concentration in water and its health risk with a system dynamics model. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 669:103-111. [PMID: 30878918 DOI: 10.1016/j.scitotenv.2019.03.103] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 03/07/2019] [Accepted: 03/07/2019] [Indexed: 06/09/2023]
Abstract
This study is the first to use reliable data sources to establish a reasonable mass balance of Cr(VI) contamination in river water, sediment, and farmland soil. A system dynamics model was used to establish the interrelationships among water, Cr(VI) contamination, and health effects in the Wu River watershed (between Taichung city and Changhua county) between 2018 and 2048 (30 years). The results show very little Cr(VI) contamination in rivers; most flowed downstream or settled in sediment, and the accumulation of Cr(VI) in the sediment increased throughout the study period. The highest Cr(VI) concentrations in farmland soil (338.46 mg/kg) were reached in Changhua county as a result of greater Cr(VI) contamination from upstream and local factories. This Cr(VI) contamination led to gastric cancer risks of 5.24 × 10-4 and 4.38 × 10-6 in Changhua county and Taichung city, respectively. Although most of the Cr(VI) contamination was discharged from Taichung City, greater health risks and losses occurred downstream in Changhua county; medical costs were 55 times higher. For total quality control, a reduction rate of at least 68% should be reached in the study area. These findings will be helpful in predicting the transmission of Cr(VI) contamination over long study periods with a systematic model.
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Affiliation(s)
- Chao-Heng Tseng
- Institute of Environmental Engineering and Management, National Taipei University of Technology, Taipei City 106, Taiwan, ROC
| | - I-Hsuan Lee
- Institute of Environmental Engineering and Management, National Taipei University of Technology, Taipei City 106, Taiwan, ROC
| | - Ying-Chu Chen
- Department of Civil Engineering, National Taipei University of Technology, Taipei City 106, Taiwan, ROC.
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Satgurunathan T, Bhavan PS, Joy RDS. Green Synthesis of Chromium Nanoparticles and Their Effects on the Growth of the Prawn Macrobrachium rosenbergii Post-larvae. Biol Trace Elem Res 2019; 187:543-552. [PMID: 29948910 DOI: 10.1007/s12011-018-1407-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 06/03/2018] [Indexed: 02/08/2023]
Abstract
This study deals with synthesis of chromium nanoparticles (CrNPs) from potassium dichromate using the aqueous extract of Allium sativum. They were characterized through UV-VIS light, FE-SEM, EDX, XRD, and FT-IR, which revealed uniform, mono-dispersive, and highly stable CrNPs of 31-64-nm size. The Artemia nauplii was enriched with 4.94 mg/L of CrNPs (24-h LC50) at different durations (½, 1, 2, and 4 h) and then fed to Macrobrachium rosenbegii post-larvae (PL) for 30 days as live feed. The results showed that ½- and 1-h enriched Artemia nauplii led to significant improvements in nutritional indices including growth and survival, and concentrations of tissue biochemical constituents, such as total protein, amino acid, carbohydrate, and lipid of M. rosenbergii PL (P < 0.05), which suggests that this concentration of CrNPs was non-toxic to M. rosenbergii PL. This was confirmed by the insignificant alterations recorded in activities of SOD and CAT (P > 0.05) in M. rosenbergii PL fed with ½- and 1-h enriched Artemia nauplii as live feed. After that, SOD and CAT activities started to increase. Therefore, this optimized concentration of CrNPs (4.94 mg/L) is recommended for enrichment of Artemia nauplii for ½-1-h duration as a sustainable material in the nursery of M. rosenbergii.
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Younan S, Sakita GZ, Coluna JGY, Rufino MN, Keller R, Bremer-Neto H. Probiotic mitigates the toxic effects of potassium dichromate in a preclinical study: a randomized controlled trial. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:183-190. [PMID: 29851070 DOI: 10.1002/jsfa.9159] [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: 12/28/2017] [Revised: 04/19/2018] [Accepted: 05/28/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND The present study aimed to evaluate the nutritional, physiological and biochemical effects of dietary supplementation of an association of probiotic bacteria in rats intoxicated with chromium (VI). Ninety-six male rats, recently weaned, were randomly divided into eight groups (n = 12): Control, DK12, DK24 and DK36 (0, 0.12, 0.24 and 0.36 g kg-1 of K2 Cr2 O7 incorporated in the basal feed, respectively) and groups Prob, DK12 + Prob, DK24 + Prob and DK36 + Prob received a progressive dose of 0, 0.12, 0.24 and 0.36 g kg-1 of K2 Cr2 O7 incorporated in the basal feed and supplemented with 0.02 g kg-1 of an association of probiotic bacteria (Lactobacillus acidophilus, Enterococcus faecium, Bifidobacterium thermophilum and Bifidobacterium longum). RESULTS After 90 days, we observed significant (P < 0.05) and dose-dependent alterations from incorporation of increasing doses of chromium (VI) related to nutritional, physiological and biochemical parameters. These changes were attenuated (P < 0.05) with probiotic supplementation. CONCLUSION Supplementation with probiotics in the diet beneficially modified the nutritional and physiological parameters, as well as hepatic, renal, glycemic and lipid profiles, of animals intoxicated with increasing doses of K2 Cr2 O7 . © 2018 Society of Chemical Industry.
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Affiliation(s)
- Soraia Younan
- Department of Functional Sciences, Universidade do Oeste Paulista, Presidente Prudente, Brazil
| | - Gabriel Zanuto Sakita
- Animal Nutrition Laboratory, Universidade de São Paulo, Centro de Energia Nuclear na Agricultura, Piracicaba, Brazil
| | - João Gabriel Younan Coluna
- Faculty of Medicine, Department of Functional Sciences, Universidade do Oeste Paulista, Presidente Prudente, Brazil
| | - Marcos Natal Rufino
- Department of Functional Sciences, Universidade do Oeste Paulista, Presidente Prudente, Brazil
| | - Rogéria Keller
- Department of Functional Sciences, Universidade do Oeste Paulista, Presidente Prudente, Brazil
| | - Hermann Bremer-Neto
- Department of Functional Sciences, Universidade do Oeste Paulista, Faculty of Medicine, Presidente Prudente, Brazil
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Zhang C, Cai K, Feng Q, Xu Y, Zhang Z. Chromium(VI) promotes cell migration through targeting epithelial-mesenchymal transition in prostate cancer. Toxicol Lett 2018; 300:10-17. [PMID: 30315950 DOI: 10.1016/j.toxlet.2018.10.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 08/28/2018] [Accepted: 10/08/2018] [Indexed: 01/27/2023]
Abstract
Chromium (Cr) is widely used in industry, making its toxicity a matter of concern. Although hexavalent Cr [Cr(VI)] can promote cancer cell proliferation in several cancers, there is little evidence implicating Cr(VI) in cancer cell migration, especially in prostate cancer. We show that the Cr concentration is higher in the serum of prostate cancer patients, and is closely associated with unfavorable outcomes for the patients. Additionally, low dose trivalent Cr [Cr(III)] exposure has no obvious carcinogenic effects in prostate cancer. However, Cr(VI) can promote proliferation and invasion of prostate cancer cell line PC3 cells in vitro and in vivo. In seeking the molecular mechanism of Cr(VI) exposure on cancer progression, we found that Cr(VI) could down-regulate the epithelial protein marker, E-cadherin, and up-regulate mesenchymal protein markers, such as N-cadherin and Snail. Together, these data indicate that Cr(VI) is a newly verified carcinogen in prostate cancer, and can promote cell migration by affecting the Epithelial-Mesenchymal Transition (EMT) pathway. Thus, inhibition of Cr(VI)-EMT signaling is a prospective approach toward limiting prostate tumor progression.
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Affiliation(s)
- Changwen Zhang
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, China
| | - Keke Cai
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, China
| | - Qijin Feng
- Department of Orthopaedics, The Second Affiliated Hospital of Tianjin University of Traditional Chinese Medicine, China
| | - Yong Xu
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, China.
| | - Zhihong Zhang
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, China.
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Séby F, Vacchina V. Critical assessment of hexavalent chromium species from different solid environmental, industrial and food matrices. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2017.11.019] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Shipkowski KA, Sheth CM, Smith MJ, Hooth MJ, White KL, Germolec DR. Assessment of immunotoxicity in female Fischer 344/N and Sprague Dawley rats and female B 6C 3F 1 mice exposed to hexavalent chromium via the drinking water. J Immunotoxicol 2018; 14:215-227. [PMID: 29141474 DOI: 10.1080/1547691x.2017.1394932] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Sodium dichromate dihydrate (SDD), an inorganic compound containing hexavalent chromium (Cr(VI)), is a common environmental contaminant of groundwater sources due to widespread industrial use. There are indications in the literature that Cr(VI) may induce immunotoxic effects following dermal exposure, including acting as both an irritant and a sensitizer; however, the potential immunomodulatory effects of Cr(VI) following oral exposure are relatively unknown. Following the detection of Cr(VI) in drinking water sources, the National Toxicology Program (NTP) conducted extensive evaluations of the toxicity and carcinogenicity of SDD following drinking water exposure, including studies to assess the potential for Cr(VI) to modulate immune function. For the immunotoxicity assessments, female Fischer 344/N (F344/N) and Sprague Dawley (SD) rats and female B6C3F1 mice were exposed to SDD in drinking water for 28 consecutive days and evaluated for alterations in cellular and humoral immune function as well as innate immunity. Rats were exposed to concentrations of 0, 14.3, 57.3, 172, or 516 ppm SDD while mice were exposed to concentrations of 0, 15.6, 31.3, 62.5, 125, or 250 ppm SDD. Final mean body weight and body weight gain were decreased relative to controls in 250 ppm B6C3F1 mice and 516 ppm SD rats. Water consumption was significantly decreased in F344/N and SD rats exposed to 172 and 516 ppm SDD; this was attributed to poor palatability of the SDD drinking water solutions. Several red blood cell-specific parameters were significantly (5-7%) decreased in 250 ppm mice; however, these parameters were unaffected in rats. Sporadic increases in the spleen IgM antibody response to sheep red blood cells (SRBC) were observed, however, these increases were not dose-dependent and were not reproducible. No significant effects were observed in the other immunological parameters evaluated. Overall, exposure to Cr(VI) in drinking water had limited effects on the immune system in both rats and mice.
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Affiliation(s)
- Kelly A Shipkowski
- a Division of the National Toxicology Program , National Institute of Environmental Health Sciences , Research Triangle Park , NC , USA
| | - Christopher M Sheth
- b Center for Drug Evaluation and Research , Food and Drug Administration , Silver Spring , MD , USA
| | - Matthew J Smith
- c Richard Bland College of William & Mary , Petersburg , VA , USA
| | - Michelle J Hooth
- a Division of the National Toxicology Program , National Institute of Environmental Health Sciences , Research Triangle Park , NC , USA
| | - Kimber L White
- d Department of Pharmacology and Toxicology (retired) , Virginia Commonwealth University , Richmond , VA , USA
| | - Dori R Germolec
- a Division of the National Toxicology Program , National Institute of Environmental Health Sciences , Research Triangle Park , NC , USA
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Progress in Understanding the Mechanism of CrVI Removal in Fe0-Based Filtration Systems. WATER 2018. [DOI: 10.3390/w10050651] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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40
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Moffat I, Martinova N, Seidel C, Thompson CM. Hexavalent Chromium in Drinking Water. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/awwa.1044] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ivy Moffat
- Water and Air Quality Bureau; Health Canada; Ottawa Ont. Canada
| | - Nadia Martinova
- Water and Air Quality Bureau; Health Canada; Ottawa Ont. Canada
| | - Chad Seidel
- Corona Environmental Consulting; Louisville Colo
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Takahashi N, Yoshida T, Kojima S, Yamaguchi S, Ohtsuka R, Takeda M, Kosaka T, Harada T. Pathological and Clinical Pathological Changes Induced by Four-week, Repeated-dose, Oral Administration of the Wood Preservative Chromated Copper Arsenate in Wistar Rats. Toxicol Pathol 2018; 46:312-323. [PMID: 29587599 DOI: 10.1177/0192623318765392] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Chromated copper arsenate (CCA) is used as a wood preservative worldwide. Exposure to it may adversely affect human health. Some events have increased human exposure to CCA, including the Great East Japan Earthquake, which generated a large amount of lumber debris from CCA-treated woods. We elucidated the toxicity due to daily exposure to CCA over a 4-week period at doses of 0, 8, 40, and 80 mg/kg/day in Wistar Hannover rats. Chromium (Cr) and arsenic (As), but not copper, were detected in the plasma samples of rats treated with various doses of CCA. Males and females showed sedation, and males had poor body weight gain. The clinical pathologies observed in both sexes included hypochromic and microcytic anemia, hepatic and renal dysfunction, and changes in lipid and glucose levels. Histopathologically, males and females showed forestomach hyperkeratosis, mucosal epithelial hyperplasia in the small intestine, rectal goblet cell hypertrophy, and lipofuscin deposition in the proximal renal tubule. Females showed diffuse hepatocellular hypertrophy with increased 8-hydroxydeoxyguanosine levels. These results indicated that oral administration of CCA mainly affected hematopoietic, gastrointestinal, hepatic, and renal systems owing to the toxic effects of As and/or Cr. Major toxic effects were observed in both sexes receiving 40 and 80 mg/kg/day.
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Affiliation(s)
- Naofumi Takahashi
- 1 The Institute of Environmental Toxicology, Joso-shi, Ibaraki, Japan
| | - Toshinori Yoshida
- 2 Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Fuchu-shi, Tokyo, Japan
| | - Sayuri Kojima
- 1 The Institute of Environmental Toxicology, Joso-shi, Ibaraki, Japan
| | - Satoru Yamaguchi
- 1 The Institute of Environmental Toxicology, Joso-shi, Ibaraki, Japan
| | - Ryoichi Ohtsuka
- 1 The Institute of Environmental Toxicology, Joso-shi, Ibaraki, Japan
| | - Makio Takeda
- 1 The Institute of Environmental Toxicology, Joso-shi, Ibaraki, Japan
| | - Tadashi Kosaka
- 1 The Institute of Environmental Toxicology, Joso-shi, Ibaraki, Japan
| | - Takanori Harada
- 1 The Institute of Environmental Toxicology, Joso-shi, Ibaraki, Japan
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Zhang D, Liu J, Qi T, Ge B, Wang Z, Jiang S, Liu Q, Zhang H, Ding G, Tang B. Transcriptome Analysis of Hepatopancreas from the Cr (VI)-Stimulated Mantis Shrimp ( Oratosquilla oratoria) by Illumina Paired-End Sequencing: Assembly, Annotation, and Expression Analysis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:2598-2606. [PMID: 29425446 DOI: 10.1021/acs.jafc.7b05074] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Cr (VI), the pathogenicity factor, is widely known to cause toxic effects in living organisms. Given the economic importance of the mantis shrimp ( Oratosquilla oratoria), the understanding of impacts by Cr (VI) is considered important. In this study, transcriptome of mantis shrimp was characterized by a comparison between control and Cr (VI)-treated samples using RNA-seq approach. Totally, 88 234 826 bp and 13.24G clean reads were obtained. The total length and number of unigenes were 68 411 206 bp and 100 918, respectively. The maximal and average length of unigenes was 24 906 bp and 678 bp, respectively (N50, 798 bp). 7115 of these unigenes accounted for 7.05% of the total that were annotated in all databases. After annotation of assembled unigenes, 35 619 of them were assigned into 3 functional categories and 56 subcategories using Gene Ontology; 18 580 of them were assigned into 26 functional categories using Clusters of Orthologous Groups of proteins; 16 864 of them were assigned into 5 major categories and 32 subclasses using KEGG. Finally, 1730 genes were differentially expressed (DGEs), 9 up-regulated pathways (protein digestion and absorption, neuroactive ligand-receptor interaction, pancreatic secretion, tyrosine metabolism, amoebiasis, ECM-receptor interaction, riboflavin metabolism, amino sugar and nucleotide sugar metabolism and AGE-RAGE signaling pathway in diabetic complications) were significantly enriched ( q < 0.05), and one down-regulated pathway ( Staphylococcus aureus infection) was significantly enriched ( q < 0.05). Up-regulation of genes in pathways of protein digestion/absorption ( PepT1/SLC15A and ATP1B) and environment information processing ( COL1AS, COL4A; LAMA3_5, LAMB3; FN1 and TN) may imply the potentially positive toxicity resistance mechanisms.
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Affiliation(s)
- Daizhen Zhang
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture , Yancheng Teachers University , Yancheng 224051 , China
| | - Jun Liu
- Key Laboratory of Biotechnology in Lianyungang Normal College , Lianyungang 222006 , China
| | - Tingting Qi
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture , Yancheng Teachers University , Yancheng 224051 , China
| | - Baoming Ge
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture , Yancheng Teachers University , Yancheng 224051 , China
| | - Zhengfei Wang
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture , Yancheng Teachers University , Yancheng 224051 , China
| | - Senhao Jiang
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture , Yancheng Teachers University , Yancheng 224051 , China
| | - Qiuning Liu
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture , Yancheng Teachers University , Yancheng 224051 , China
| | - Huabin Zhang
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture , Yancheng Teachers University , Yancheng 224051 , China
| | - Ge Ding
- Chemical and Biological Engineering College , Yancheng Institute of Technology , Yancheng 224003 , China
| | - Boping Tang
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture , Yancheng Teachers University , Yancheng 224051 , China
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43
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Thompson CM, Kirman CR, Hays SM, Suh M, Harvey SE, Proctor DM, Rager JE, Haws LC, Harris MA. Integration of mechanistic and pharmacokinetic information to derive oral reference dose and margin-of-exposure values for hexavalent chromium. J Appl Toxicol 2018; 38:351-365. [PMID: 29064106 PMCID: PMC5813206 DOI: 10.1002/jat.3545] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 08/28/2017] [Accepted: 09/05/2017] [Indexed: 01/18/2023]
Abstract
The current US Environmental Protection Agency (EPA) reference dose (RfD) for oral exposure to chromium, 0.003 mg kg-1 day-1 , is based on a no-observable-adverse-effect-level from a 1958 bioassay of rats exposed to ≤25 ppm hexavalent chromium [Cr(VI)] in drinking water. EPA characterizes the confidence in this RfD as "low." A more recent cancer bioassay indicates that Cr(VI) in drinking water is carcinogenic to mice at ≥30 ppm. To assess whether the existing RfD is health protective, neoplastic and non-neoplastic lesions from the 2 year cancer bioassay were modeled in a three-step process. First, a rodent physiological-based pharmacokinetic (PBPK) model was used to estimate internal dose metrics relevant to each lesion. Second, benchmark dose modeling was conducted on each lesion using the internal dose metrics. Third, a human PBPK model was used to estimate the daily mg kg-1 dose that would produce the same internal dose metric in both normal and susceptible humans. Mechanistic research into the mode of action for Cr(VI)-induced intestinal tumors in mice supports a threshold mechanism involving intestinal wounding and chronic regenerative hyperplasia. As such, an RfD was developed using incidence data for the precursor lesion diffuse epithelial hyperplasia. This RfD was compared to RfDs for other non-cancer endpoints; all RfD values ranged 0.003-0.02 mg kg-1 day-1 . The lowest of these values is identical to EPA's existing RfD value. Although the RfD value remains 0.003 mg kg-1 day-1 , the confidence is greatly improved due to the use of a 2-year bioassay, mechanistic data, PBPK models and benchmark dose modeling.
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Affiliation(s)
| | | | - Sean M Hays
- Summit Toxicology, LLP, Bozeman, MT, 59722, USA
| | - Mina Suh
- ToxStrategies, Inc., Mission Viejo, CA, 92692, USA
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Wang Z, Wu J, Humphries B, Kondo K, Jiang Y, Shi X, Yang C. Upregulation of histone-lysine methyltransferases plays a causal role in hexavalent chromium-induced cancer stem cell-like property and cell transformation. Toxicol Appl Pharmacol 2018; 342:22-30. [PMID: 29391238 PMCID: PMC5825290 DOI: 10.1016/j.taap.2018.01.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 01/24/2018] [Accepted: 01/28/2018] [Indexed: 02/08/2023]
Abstract
While hexavalent chromium [Cr(VI)] is generally considered as a genotoxic environmental carcinogen, studies showed that Cr(VI) exposure also causes epigenetic changes. However, whether Cr(VI)-caused epigenetic dysregulations plays an important role in Cr(VI) carcinogenicity remain largely unknown. The aim of this study was to determine if chronic low dose Cr(VI) exposure causes epigenetic changes, the underlying mechanism and whether chronic low dose Cr(VI) exposure-caused epigenetic dysregulation contributes causally to Cr(VI)-induced cancer stem cell (CSC)-like property and cell transformation. Two immortalized human bronchial epithelial cell lines (BEAS-2B and 16HBE) were exposed to 0.25 μM of K2Cr2O7 for 20 and 40 weeks to induce cell transformation, respectively. Cr(VI)-induced epigenetic changes were examined in Cr(VI)-transformed cells and Cr(VI) exposure-caused human lung cancer tissues. Pharmacological inhibitors and gene knockdown experiments were used to determine the role of epigenetic dysregulation in Cr(VI) carcinogenicity. We found that chronic Cr(VI) exposure causes epigenetic dysregulation as evidenced by the increased levels of histone H3 repressive methylation marks (H3K9me2 and H3K27me3) and the related histone-lysing methyltransferases (HMTases). Pharmacological inhibition or knockdown of HMTases reduces H3 repressive methylation marks and malignant phenotypes of Cr(VI)-transformed cells. Moreover, knockdown of HMTases in parental cells significantly reduces chronic Cr(VI) exposure-induced CSC-like property and cell transformation. Further mechanistic study revealed that knockdown of HMTases decreases Cr(VI) exposure-caused DNA damage. Our findings indicate that chronic Cr(VI) exposure increases H3 repressive methylation marks by increasing the related HMTases expression; and that increased expression of HMTases plays a causal role in Cr(VI)-induced CSC-like property and cell transformation.
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Affiliation(s)
- Zhishan Wang
- Center for Research on Environmental Disease, University of Kentucky College of Medicine, Lexington, KY, USA; Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Jianjun Wu
- Center for Research on Environmental Disease, University of Kentucky College of Medicine, Lexington, KY, USA; Institute for Chemical Carcinogenesis, State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, Guangdong, PR China
| | - Brock Humphries
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA
| | - Kazuya Kondo
- Department of Oncological Medical Services, Graduate School of Biomedical Sciences, Tokushima University Graduate School, Tokushima city, Japan
| | - Yiguo Jiang
- Institute for Chemical Carcinogenesis, State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, Guangdong, PR China
| | - Xianglin Shi
- Center for Research on Environmental Disease, University of Kentucky College of Medicine, Lexington, KY, USA; Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Chengfeng Yang
- Center for Research on Environmental Disease, University of Kentucky College of Medicine, Lexington, KY, USA; Department of Toxicology and Cancer Biology, University of Kentucky College of Medicine, Lexington, KY, USA.
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45
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Thompson CM, Wolf JC, McCoy A, Suh M, Proctor DM, Kirman CR, Haws LC, Harris MA. Comparison of Toxicity and Recovery in the Duodenum of B6C3F1 Mice Following Treatment with Intestinal Carcinogens Captan, Folpet, and Hexavalent Chromium. Toxicol Pathol 2017; 45:1091-1101. [PMID: 29161989 PMCID: PMC5761716 DOI: 10.1177/0192623317742324] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
High concentrations of hexavalent chromium (Cr(VI)), captan, and folpet induce duodenal tumors in mice. Using standardized tissue collection procedures and diagnostic criteria, we compared the duodenal histopathology in B6C3F1 mice following exposure to these 3 carcinogens to determine whether they share similar histopathological characteristics. B6C3F1 mice ( n = 20 per group) were exposed to 180 ppm Cr(VI) in drinking water, 12,000 ppm captan in feed, or 16,000 ppm folpet in feed for 28 days. After 28 days of exposure, villous enterocyte hypertrophy and mild crypt epithelial hyperplasia were observed in all exposed mice. In a subset of mice allowed to recover for 28 days, duodenal samples were generally indistinguishable from those of unexposed mice. Changes in the villi and lack of observable damage to the crypt compartment suggest that toxicity was mediated in the villi, which is consistent with earlier studies on each chemical. These findings indicate that structurally diverse agents can induce similar (and reversible) phenotypic changes in the duodenum. These intestinal carcinogens likely converge on common pathways involving irritation and wounding of the villi leading to crypt regenerative hyperplasia that, under protracted high-dose exposure scenarios, increases the risk of spontaneous mutation and tumorigenesis.
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Affiliation(s)
| | - Jeffrey C. Wolf
- Experimental Pathology Laboratories, Inc., Sterling, Virginia, USA
| | | | - Mina Suh
- ToxStrategies, Inc., Mission Viejo, California, USA
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Thompson CM, Suh M, Proctor DM, Haws LC, Harris MA. Ten factors for considering the mode of action of Cr(VI)-induced gastrointestinal tumors in rodents. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2017; 823:45-57. [DOI: 10.1016/j.mrgentox.2017.08.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 08/26/2017] [Accepted: 08/28/2017] [Indexed: 12/28/2022]
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Mitochondrial Biogenesis in Response to Chromium (VI) Toxicity in Human Liver Cells. Int J Mol Sci 2017; 18:ijms18091877. [PMID: 28906435 PMCID: PMC5618526 DOI: 10.3390/ijms18091877] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 08/24/2017] [Accepted: 08/25/2017] [Indexed: 12/31/2022] Open
Abstract
Hexavalent chromium (Cr(VI)) is a ubiquitous environmental pollutant, which poses a threat to human public health. Recent studies have shown that mitochondrial biogenesis can be activated by inflammatory and oxidative stress. However, whether mitochondrial biogenesis is involved in Cr(VI)-induced hepatotoxicity is unclear. Here, we demonstrated the induction of inflammatory response and oxidative stress, as indicated by upregulation of inflammatory factors and reactive oxygen species (ROS). Subsequently, we demonstrated that mitochondrial biogenesis, comprising the mitochondrial DNA copy number and mitochondrial mass, was significantly increased in HepG2 cells exposed to low concentrations of Cr(VI). Expression of genes related to mitochondrial function complex I and complex V was upregulated at low concentrations of Cr(VI). mRNA levels of antioxidant enzymes, including superoxide dismutase 1 and 2 (SOD1 and SOD2, respectively), kech like ECH associate protein 1 (KEAP1) and nuclear respiratory factor 2 (NRF-2), were also upregulated. Consistent with the above results, mRNA and protein levels of key transcriptional regulators of mitochondrial biogenesis such as the peroxisome-proliferator-activated receptor γ coactivator-1α (PGC-1α), NRF-1 and mitochondrial transcription factor A (TFAM) were increased by low concentrations of Cr(VI) in HepG2 cells. Moreover, we found that PGC-1α and NRF-1 tended to translocate into the nucleus. The expression of genes potentially involved in mitochondrial biogenesis pathways, including mRNA level of silent information regulator-1 (SIRT1), forkhead box class-O (FOXO1), threonine kinase 1 (AKT1), and cAMP response element-binding protein (CREB1), was also upregulated. In contrast, mitochondrial biogenesis was inhibited and the expression of its regulatory factors and antioxidants was downregulated at high and cytotoxic concentrations of Cr(VI) in HepG2 cells. It is believed that pretreatment with α-tocopherol could be acting against the mitochondrial biogenesis imbalance induced by Cr(VI). In conclusion, our study suggests that the homeostasis of mitochondrial biogenesis may be an important cellular compensatory mechanism against Cr(VI)-induced toxicity and a promising detoxification target.
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Qayyum MA, Shah MH. Study of trace metal imbalances in the blood, scalp hair and nails of oral cancer patients from Pakistan. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 593-594:191-201. [PMID: 28343039 DOI: 10.1016/j.scitotenv.2017.03.169] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 03/17/2017] [Accepted: 03/18/2017] [Indexed: 06/06/2023]
Abstract
Oral cancer is an important cause of cancer morbidity and mortality globally and exposure to trace metals alongside tobacco, alcohol and HPV are the important etiological factors in its development. Selected essential and toxic trace metals (Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) were measured in the blood, scalp hair and nails of oral cancer patients and counterpart controls by atomic absorption spectrometry. Mean concentrations of Cd, Ni and Pb were found to be significantly higher (p<0.05) and those of Cu, Fe and Zn were considerably lower in the blood, scalp hair and nails of the patients than the controls. Most of the metal concentrations exhibited higher dispersion and asymmetry in the blood, scalp hair and nails of the patients compared with the controls. The correlation study revealed significantly diverse relationships among the metals in blood, scalp hair and nails of both donor groups. Variations in the metal levels were also noted for various stages (I, II, III & IV) as well as the types (adenocarcinoma and squamous cell carcinoma) of oral cancer. Multivariate cluster analysis of the metal levels in the patients were also significantly dissimilar than the controls. The study evidenced considerably divergent variations in the metal levels in oral cancer patients in comparison with the controls.
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Affiliation(s)
| | - Munir H Shah
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan.
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Wang Y, Su H, Gu Y, Song X, Zhao J. Carcinogenicity of chromium and chemoprevention: a brief update. Onco Targets Ther 2017; 10:4065-4079. [PMID: 28860815 PMCID: PMC5565385 DOI: 10.2147/ott.s139262] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Chromium has two main valence states: hexavalent chromium (Cr[VI]) and trivalent chromium (Cr[III]). Cr(VI), a well-established human carcinogen, can enter cells by way of a sulfate/phosphate anion-transport system, and then be reduced to lower-valence intermediates consisting of pentavalent chromium (Cr[V]), tetravalent chromium (Cr[IV]) or Cr(III) via cellular reductants. These intermediates may directly or indirectly result in DNA damage or DNA–protein cross-links. Although Cr(III) complexes cannot pass easily through cell membranes, they have the ability to accumulate around cells to induce cell-surface morphological alteration and result in cell-membrane lipid injuries via disruption of cellular functions and integrity, and finally to cause DNA damage. In recent years, more research, including in vitro, in vivo, and epidemiological studies, has been conducted to evaluate the genotoxicity/carcinogenicity induced by Cr(VI) and/or Cr(III) compounds. At the same time, various therapeutic agents, especially antioxidants, have been explored through in vitro and in vivo studies for preventing chromium-induced genotoxicity/carcinogenesis. This review aims to provide a brief update on the carcinogenicity of Cr(VI) and Cr(III) and chemoprevention with different antioxidants.
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Affiliation(s)
- Yafei Wang
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, People's Republic of China
| | - Hong Su
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, People's Republic of China
| | - Yuanliang Gu
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, People's Republic of China
| | - Xin Song
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, People's Republic of China
| | - Jinshun Zhao
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, People's Republic of China.,Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV, USA
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50
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Zhong X, Zeng M, Bian H, Zhong C, Xiao F. An evaluation of the protective role of vitamin C in reactive oxygen species-induced hepatotoxicity due to hexavalent chromium in vitro and in vivo. J Occup Med Toxicol 2017. [PMID: 28638434 PMCID: PMC5472873 DOI: 10.1186/s12995-017-0161-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Backgroud Drinking water contamination with hexavalent chromium [Cr (VI)] has become one of the most serious public health problems, thus the investigation of Cr (VI)-induced hepatotoxicity has attracted much attention in recent years. Methods In the present study, by determining the indices of hepatotoxicity induced by Cr (VI), the source of accumulated reactive oxygen species (ROS), and the protective effect of the antioxidant Vitamin C (Vit C), we explored the mechanisms involved in Cr (VI)-induced hepatotoxicity in vitro and in vivo. Results We found Cr (VI) caused hepatotoxicity characterized by the alterations of several enzymatic and cytokine markers including aspartate aminotransferase (AST), alanine aminotransferase (ALT), interleukine-1β (IL-1β), and tumor necrosis factor-α (TNF-α), etc. ROS production after Cr (VI) exposure was origins from the inhibition of electron transfer chain (ETC) and antioxidant system. Vit C inhibited ROS accumulation thus protected against Cr (VI)-induced hepatotoxicity in L-02 hepatocytes and in the rat model. Conclusions We concluded that ROS played a role in Cr (VI)-induced hepatotoxicity and Vit C exhibited protective effect. Our current data provides important clues for studying the mechanisms involved in Cr (VI)-induced liver injury, and may be of great help to develop therapeutic strategies for prevention and treatment of liver diseases involving ROS accumulation for occupational exposure population.
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Affiliation(s)
- Xiali Zhong
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, NO. 238 Shangmayuanling Road, Kaifu District, Changsha, 410078 Hunan People's Republic of China
| | - Ming Zeng
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, NO. 238 Shangmayuanling Road, Kaifu District, Changsha, 410078 Hunan People's Republic of China
| | - Huanfeng Bian
- Shajing Institution of Health Supervision of Baoan District, Shenzhen, 518104 People's Republic of China
| | - Caigao Zhong
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, NO. 238 Shangmayuanling Road, Kaifu District, Changsha, 410078 Hunan People's Republic of China
| | - Fang Xiao
- Department of Health Toxicology, Xiangya School of Public Health, Central South University, NO. 238 Shangmayuanling Road, Kaifu District, Changsha, 410078 Hunan People's Republic of China
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