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Choi EM, Suh KS, Yun SJ, Park J, Park SY, Chin SO, Chon S. Oleuropein attenuates the 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-perturbing effects on pancreatic β-cells. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:752-761. [PMID: 33985414 DOI: 10.1080/10934529.2021.1923312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 04/20/2021] [Accepted: 04/22/2021] [Indexed: 06/12/2023]
Abstract
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is an endocrine disrupting compound and persistent organic pollutant that has been associated with diabetes in several epidemiological studies. Oleuropein, a major phenolic compound in olive fruit, is a superior antioxidant and radical scavenger. This study aimed to examine the effects of oleuropein against TCDD-induced stress response in a pancreatic beta cell line, INS-1 cells. Cells were pre-incubated with various concentrations of oleuropein and then stimulated with TCDD (10 nM) for 48 hrs. When treated with TCDD, INS-1 cells produced robust amounts of prostaglandin E2 (PGE2) compared to the untreated control, and this increase was inhibited by oleuropein treatment. TCDD increased Ca2+-independent phospholipase A2 (iPLA2β) level, but had no effect on Group 10 secretory phospholipase A2 (PLA2G10) level, while oleuropein deceased the levels of iPLA2β and PLA2G10 in the presence of TCDD. Cyclooxygenase-1 (COX-1) was significantly increased by TCDD treatment and attenuated with oleuropein pretreatment. Oleuropein decreased TCDD-mediated production of JNK, TNF-α, and ROS. In addition, oleuropein increased Akt and GLUT2 levels suppressed by TCDD in INS-1 cells. Thus, the results suggest that oleuropein prevents pancreatic beta cell impairment by TCDD.
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Affiliation(s)
- Eun Mi Choi
- Department of Endocrinology & Metabolism, Kyung Hee University Hospital, Seoul, Republic of Korea
| | - Kwang Sik Suh
- Department of Endocrinology & Metabolism, Kyung Hee University Hospital, Seoul, Republic of Korea
- Department of Endocrinology & Metabolism, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Soo Jin Yun
- Department of Endocrinology & Metabolism, Kyung Hee University Hospital, Seoul, Republic of Korea
- Department of Medicine, Graduate School, Kyung Hee University, Seoul, Republic of Korea
| | - Jinsun Park
- Department of Endocrinology & Metabolism, Kyung Hee University Hospital, Seoul, Republic of Korea
- Department of Medicine, Graduate School, Kyung Hee University, Seoul, Republic of Korea
| | - So Young Park
- Department of Endocrinology & Metabolism, Kyung Hee University Hospital, Seoul, Republic of Korea
| | - Sang Ouk Chin
- Department of Endocrinology & Metabolism, Kyung Hee University Hospital, Seoul, Republic of Korea
- Department of Endocrinology & Metabolism, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Suk Chon
- Department of Endocrinology & Metabolism, Kyung Hee University Hospital, Seoul, Republic of Korea
- Department of Endocrinology & Metabolism, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
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Sabarwal A, Kumar K, Singh RP. Hazardous effects of chemical pesticides on human health-Cancer and other associated disorders. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 63:103-114. [PMID: 30199797 DOI: 10.1016/j.etap.2018.08.018] [Citation(s) in RCA: 234] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Revised: 07/21/2018] [Accepted: 08/27/2018] [Indexed: 05/27/2023]
Abstract
Poisoning from pesticides is a global public health problem and accounts for nearly 300,000 deaths worldwide every year. Exposure to pesticides is inevitable; there are different modes through which humans get exposed to pesticides. The mode of exposure is an important factor as it also signifies the concentration of pesticides exposure. Pesticides are used extensively in agricultural and domestic settings. These chemicals are believed to cause many disorders in humans and wildlife. Research from past few decades has tried to answer the associated mechanism of action of pesticides in conjunction with their harmful effects. This perspective considers the past and present research in the field of pesticides and associated disorders. We have reviewed the most common diseases including cancer which are associated with pesticides. Pesticides have shown to be involved in the pathogenesis of Parkinson's and Alzheimer's diseases as well as various disorders of the respiratory and reproductive tracts. Oxidative stress caused by pesticides is an important mechanism through which many of the pesticides exert their harmful effects. Oxidative stress is known to cause DNA damage which in turn may cause malignancies and other disorders. Many pesticides have shown to modulate the gene expression at the level of non-coding RNAs, histone deacetylases, DNA methylation patterns suggesting their role in epigenetics.
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Affiliation(s)
- Akash Sabarwal
- School of Life Sciences, Central University of Gujarat, Gandhinagar, Gujarat, India; Cancer Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Kunal Kumar
- School of Life Sciences, Central University of Gujarat, Gandhinagar, Gujarat, India
| | - Rana P Singh
- School of Life Sciences, Central University of Gujarat, Gandhinagar, Gujarat, India; Cancer Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India.
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De Tata V. Association of dioxin and other persistent organic pollutants (POPs) with diabetes: epidemiological evidence and new mechanisms of beta cell dysfunction. Int J Mol Sci 2014; 15:7787-811. [PMID: 24802877 PMCID: PMC4057704 DOI: 10.3390/ijms15057787] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 04/16/2014] [Accepted: 04/21/2014] [Indexed: 12/23/2022] Open
Abstract
The worldwide explosion of the rates of diabetes and other metabolic diseases in the last few decades cannot be fully explained only by changes in the prevalence of classical lifestyle-related risk factors, such as physical inactivity and poor diet. For this reason, it has been recently proposed that other "nontraditional" risk factors could contribute to the diabetes epidemics. In particular, an increasing number of reports indicate that chronic exposure to and accumulation of a low concentration of environmental pollutants (especially the so-called persistent organic pollutants (POPs)) within the body might be associated with diabetogenesis. In this review, the epidemiological evidence suggesting a relationship between dioxin and other POPs exposure and diabetes incidence will be summarized, and some recent developments on the possible underlying mechanisms, with particular reference to dioxin, will be presented and discussed.
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Affiliation(s)
- Vincenzo De Tata
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via Roma, 55, Scuola Medica, 56126 Pisa, Italy.
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Nishimura J, Saegusa Y, Dewa Y, Jin M, Kawai M, Kemmochi S, Harada T, Hayashi SM, Shibutani M, Mitsumori K. Antioxidant enzymatically modified isoquercitrin or melatonin supplementation reduces oxidative stress-mediated hepatocellular tumor promotion of oxfendazole in rats. Arch Toxicol 2009; 84:143-53. [DOI: 10.1007/s00204-009-0497-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2009] [Accepted: 12/02/2009] [Indexed: 02/06/2023]
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Dehydroascorbate protection against dioxin-induced toxicity in the beta-cell line INS-1E. Toxicol Lett 2009; 189:27-34. [PMID: 19414064 DOI: 10.1016/j.toxlet.2009.04.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2009] [Accepted: 04/27/2009] [Indexed: 11/22/2022]
Abstract
Oxidative stress has been proposed as a mechanism of the toxicity of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). The aim of this research was to evaluate the protective effects of increased intracellular ascorbate levels against TCDD acute toxicity in the insulin-secreting beta-cell line INS-1E. Ascorbate is considered a potent antioxidant, but its therapeutic efficacy is greatly limited by its slow achievement of high intracellular levels. This might be circumvented by administration of dehydroascorbate (DHA), which is transported at a much higher rate and undergoes rapid intracellular reduction to ascorbate. Indeed, 30 min incubation of INS-1E cells with various concentrations of DHA caused a remarkable, dose-related increase of the intracellular ascorbate levels. INS-1E cells preincubated with 0.5 and 1.0mM DHA showed a greater viability than control cells after 1h exposition to cytotoxic TCDD concentrations. In our experimental conditions, TCDD surprisingly failed to increase ROS production in INS-1E cells, but induced a dose-related mitochondrial depolarisation which was significantly improved by DHA preincubation. Furthermore, DHA preincubation completely prevented the low dose TCDD-induced inhibition of glucose-stimulated insulin secretion. Thus, our results suggest that DHA preincubation protects INS-1E cells against TCDD acute toxicity by partially preserving mitochondrial function.
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Muguruma M, Unami A, Kanki M, Kuroiwa Y, Nishimura J, Dewa Y, Umemura T, Oishi Y, Mitsumori K. Possible involvement of oxidative stress in piperonyl butoxide induced hepatocarcinogenesis in rats. Toxicology 2007; 236:61-75. [PMID: 17498859 DOI: 10.1016/j.tox.2007.03.025] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2007] [Revised: 03/27/2007] [Accepted: 03/28/2007] [Indexed: 12/20/2022]
Abstract
To clarify the possible mechanism of non-genotoxic hepatocarcinogenesis induced by piperonyl butoxide (PBO), male F344 rats were administered an i.p. injection of N-diethylnitrosamine (DEN) to initiate hepatocarcinogenesis. Two weeks later, the rats were administered a PBO-containing (0, 1, or 2%) diet for 6 weeks and subjected to a two-third partial hepatectomy 1 week later. After sacrificing them on week 8, their livers were histopathologically examined and analyzed for gene expression using a microarray and real-time RT-PCR. Reactive oxygen species (ROS) products were also measured using liver microsomes. Hepatocytes exhibited centrilobular hypertrophy and increased glutathione S-transferase placental form (GST-P) positive foci formation. ROS products increased significantly in liver microsomes. In the microarray analysis, the expressions of genes related to metabolism and oxidative stress - NAD(P)H dehydrogenase, quinone 1 (Nqo1), UDP-glucuronosyltransferase (UDPGTR-2), glutathione peroxidase 2 (Gpx2), glutathione reductase (GRx) - multidrug resistance associated protein 3 (Abcc3), and solute carrier family 7 (cationic amino acid transporter, y+ system) member 5 (Slc7a5) were up-regulated in the PBO group in comparison to the 0% PBO group; this was confirmed by real-time RT-PCR. Additionally, a significant up-regulation of stress response related genes such as CYP1A1 was observed in PBO-treated groups in real-time RT-PCR. HPLC analysis revealed that the level of 8-OHdG in the 2% PBO group was significantly higher than that in the 0% PBO group. This suggests that PBO has the potential to generate ROS via metabolic pathways and induce oxidative stress, including oxidative DNA damage, resulting in the induction of hepatocellular tumors in rats.
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Affiliation(s)
- Masako Muguruma
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Fuchu City, Tokyo 183-8509, Japan.
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Piaggi S, Novelli M, Martino L, Masini M, Raggi C, Orciuolo E, Masiello P, Casini A, De Tata V. Cell death and impairment of glucose-stimulated insulin secretion induced by 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in the beta-cell line INS-1E. Toxicol Appl Pharmacol 2007; 220:333-40. [PMID: 17363022 DOI: 10.1016/j.taap.2007.01.017] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2006] [Revised: 01/24/2007] [Accepted: 01/25/2007] [Indexed: 01/28/2023]
Abstract
The aim of this research was to characterize 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) toxicity on the insulin-secreting beta-cell line INS-1E. A sharp decline of cell survival (below 20%) was observed after 1 h exposure to TCDD concentrations between 12.5 and 25 nM. Ultrastructurally, beta-cell death was characterized by extensive degranulation, appearance of autophagic vacuoles, and peripheral nuclear condensation. Cytotoxic concentrations of TCDD rapidly induced a dose-dependent increase in intracellular calcium concentration. Blocking calcium entry by EGTA significantly decreased TCDD cytotoxicity. TCDD was also able to rapidly induce mitochondrial depolarization. Interestingly, 1 h exposition of INS-1E cells to very low TCDD concentrations (0.05-1 nM) dramatically impaired glucose-stimulated but not KCl-stimulated insulin secretion. In conclusion, our results clearly show that TCDD exerts a direct beta-cell cytotoxic effect at concentrations of 15-25 nM, but also markedly impairs glucose-stimulated insulin secretion at concentrations 20 times lower than these. On the basis of this latter observation we suggest that pancreatic beta-cells could be considered a specific and sensitive target for dioxin toxicity.
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Affiliation(s)
- Simona Piaggi
- Dipartimento di Patologia Sperimentale, Biotecnologie Mediche, Infettivologia ed Epidemiologia,Sezione di Patologia Generale, Pisa, Italy
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Moto M, Okamura M, Muguruma M, Ito T, Jin M, Kashida Y, Mitsumori K. Gene expression analysis on the dicyclanil-induced hepatocellular tumors in mice. Toxicol Pathol 2007; 34:744-51. [PMID: 17162532 DOI: 10.1080/01926230600932471] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Our previous studies showed the possibility that oxidative stress, including oxidative DNA damage, is involved in the mechanism of dicyclanil (DC)-induced hepatocarcinogenesis at the preneoplastic stage in mice. In this study, the expression analyses of genes, including oxidative stress-related genes, were performed on the tissues of hepatocellular tumors in a two-stage liver carcinogenesis model in mice. After partial hepatectomy, male ICR mice were injected with N-diethylnitrosamine (DEN) and given a diet containing 0 or 1500 ppm of DC for 20 weeks. Histopathological examinations revealed that the incidence of hepatocellular tumors (adenomas and carcinomas) significantly increased in the DEN + DC group. Gene expression analysis on the microdissected liver tissues of the mice in the DEN + DC group showed the highest expression levels of oxidative stress-related genes, such as Cyp1a1 and Txnrd1, in the tumor areas. However, no remarkable up-regulation of Ogg1-an oxidative DNA damage repair gene-was observed in the tumor areas, but the expression of Trail-an apoptosis-signaling ligand gene-was significantly down-regulated in the tumor tissues. These results suggest the possibility that the inhibition of apoptosis and a failure in the ability to repair oxidative DNA damage occur in the hepatocellular DC-induced tumors in mice.
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Affiliation(s)
- Mitsuyoshi Moto
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Fuchu, 183-8509 Tokyo, Japan.
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Yokouchi Y, Muguruma M, Moto M, Takahashi M, Jin M, Kenmochi Y, Kohno T, Dewa Y, Mitsumori K. Molecular Analysis on the Possible Mechanism of .BETA.-Naphthoflavone-Induced Hepatocarcinogenesis in Rats. J Toxicol Pathol 2007. [DOI: 10.1293/tox.20.29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Yusuke Yokouchi
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Masako Muguruma
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Mitsuyoshi Moto
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Miwa Takahashi
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Meilan Jin
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Yusuke Kenmochi
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Taichi Kohno
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Yasuaki Dewa
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Kunitoshi Mitsumori
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
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Moto M, Okamura M, Muto T, Kashida Y, Machida N, Mistumori K. Molecular pathological analysis on the mechanism of liver carcinogenesis in dicyclanil-treated mice. Toxicology 2005; 207:419-36. [PMID: 15664270 DOI: 10.1016/j.tox.2004.10.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2004] [Revised: 10/26/2004] [Accepted: 10/27/2004] [Indexed: 11/29/2022]
Abstract
To investigate the mechanism of hepatocarcinogenesis due to dicyclanil (DC), an insect growth regulator for sheep, histopathological and molecular biological analyses were performed in the liver of male ICR mice fed on a diet containing 1500 ppm of DC for 2 weeks (Experiment I; Exp. I). In gene expression analyses using a large-scale cDNA microarray and RT-PCR, fluctuations of expressions of metabolism-/oxidation-/reduction-related genes, such as CYP1A, aldehyde dehydrogenase family 1 subfamily A1 (Aldh1a1), and thioredoxin reductase 1 (Txnrd1), were predominantly observed in the liver of the DC-treated group. In Experiment II (Exp. II), small-scale and metabolism/oxidative stress-specific cDNA microarray, real-time RT-PCR, and measurement of NF-kappaB protein were performed in the mice liver using a two-stage hepatocarcinogenesis model, in which the male ICR mice were fed on a diet containing 1500 ppm of DC for 7 weeks after a single injection of dimethylnitrosamine (DMN). These mice were subjected to two-thirds partial hepatectomy (PH) at week 3. During histopathological examinations, a remarkable increase in gamma-glutamyltransferase-positive cells was observed in the DMN+DC+PH group. During the microarray and PCR analyses, the metabolism and oxidative stress-related genes, such as Cyp1a, P450 oxidoreductase (Por), and thioredoxin reductase 1 (Txnrd1); a few DNA damage/repair genes, such as 8-oxoguanine DNA-glycosylase 1 (Ogg1); and growth arrest and DNA-damage-inducible 45 alpha (Gadd45a), were fluctuated in this group, together with a slight increase in the concentration of activated NF-kappaB. These results suggest that DNA damages due to oxidative stress may be involved in the mechanism of DC-induced hepatocarcinogenesis in mice.
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Affiliation(s)
- Mitsuyoshi Moto
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan.
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