1
|
Fang Y, Bai Z, Cao J, Zhang G, Li X, Li S, Yan Y, Gao P, Kong X, Zhang Z. Low-intensity ultrasound combined with arsenic trioxide induced apoptosis of glioma via EGFR/AKT/mTOR. Life Sci 2023; 332:122103. [PMID: 37730111 DOI: 10.1016/j.lfs.2023.122103] [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: 02/23/2023] [Revised: 09/04/2023] [Accepted: 09/15/2023] [Indexed: 09/22/2023]
Abstract
AIMS This study aimed to explore whether low-intensity ultrasound (LIUS) combined with low-concentration arsenic trioxide (ATO) could inhibit the proliferation of glioma and, if so, to clarify the potential mechanism. MAIN METHODS The effects of ATO and LIUS alone or in combination on glioma were examined by CCK8, EdU, and flow cytometry assays. Western blot analysis was used to detect changes in expression of apoptosis-related proteins and their effects on the EGFR/AKT/mTOR pathway. The effects of ATO and LIUS were verified in vivo in orthotopic xenograft models, and tumor size, arsenic content in brain tissue, survival, and immunohistochemical changes were observed. KEY FINDINGS LIUS enhanced the inhibitory effect of ATO on the proliferation of glioma, and EGF reversed the proliferation inhibition and protein changes induced by ATO and LIUS. The anti-glioma effect of ATO combined with LIUS was related to downstream AKT/mTOR pathway changes caused by inhibition of EGFR activation, which enhanced apoptosis of U87MG and U373 cells. In vivo experiments showed significant increases in arsenic content in brain tissue, as well as decreased tumor sizes and longer survival times in the combined treatment group compared with other groups. The trends of immunohistochemical protein changes were consistent with the in vitro results. SIGNIFICANCE This study showed that LIUS enables ATO to exert anti-glioma effects at a safe dose by inhibiting the activation of EGFR and the downstream AKT/mTOR pathway to regulate apoptosis. LIUS in combination with ATO is a promising novel method for treating glioma and could improve patient prognosis.
Collapse
Affiliation(s)
- Yi Fang
- Department of Ultrasound, The First Affiliated Hospital, China Medical University, Shenyang, Liaoning, China
| | - Zhiqun Bai
- Department of Ultrasound, The First Affiliated Hospital, China Medical University, Shenyang, Liaoning, China
| | - Jibin Cao
- Department of Radiology, The First Affiliated Hospital, China Medical University, Shenyang, Liaoning, China
| | - Gaosen Zhang
- Department of Ultrasound, The First Affiliated Hospital, China Medical University, Shenyang, Liaoning, China
| | - Xiang Li
- Department of Ultrasound, The First Affiliated Hospital, China Medical University, Shenyang, Liaoning, China
| | - Shufeng Li
- Department of Ultrasound, The First Affiliated Hospital, China Medical University, Shenyang, Liaoning, China
| | - Yudie Yan
- Department of Ultrasound, The First Affiliated Hospital, China Medical University, Shenyang, Liaoning, China
| | - Peirong Gao
- Department of Ultrasound, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xiangkai Kong
- Department of Ultrasound, Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, Zhejiang, China
| | - Zhen Zhang
- Department of Ultrasound, The First Affiliated Hospital, China Medical University, Shenyang, Liaoning, China.
| |
Collapse
|
2
|
Pan X, Huang J, Liu S, Shao Y, Xi J, He R, Shi T, Zhuang R, Yu W. pH-Responsive and liver-targeting drug delivery system for combination delivery of artesunate with arsenic trioxide prodrug against hepatocellular carcinoma. Drug Dev Ind Pharm 2023; 49:485-496. [PMID: 37470495 DOI: 10.1080/03639045.2023.2239342] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 06/03/2023] [Accepted: 07/17/2023] [Indexed: 07/21/2023]
Abstract
OBJECTIVE Arsenic trioxide (ATO) exerts therapeutic effects on various solid tumors, and artesunate (ART) synergizes with antitumor drugs. We herein combined ART and an ATO prodrug (ATOP) in pH-responsive and liver-targeting liposomes to improve targeted hepatocellular carcinoma (HCC) treatment. METHODS 1,2-Distearoyl-sn-glycero-3-phosphoethanolamine (DSPE)-hydrazone (HYD)-polyethylene glycol (PEG)-glycyrrhetinic acid (GA) (DSPE-HYD-PEG-GA) was synthesized and characterized. The optimal ratio of ART and ATOP was selected. Calcium arsenate nanoparticles (CaAs NPs) and DSPE-HYD-PEG-GA@ART/CaAs NPs liposomes were prepared and their physicochemical properties were characterized. Their intracellular uptake, intracellular localization, uptake pathway identification, cytotoxicity, proapoptotic effects, and relevant mechanisms were studied. RESULTS The DSPE-HYD-PEG-GA was successfully synthesized. The best ratio of ART and ATOP was 7:1. The particle size of CaAs NPs under transmission electron microscopy was 142.39 ± 21.50 nm. Arsenic (As), calcium, and oxygen elements were uniformly distributed in CaAs NPs, and the drug loading and encapsulation efficiency of As are 37.28% and 51.40%, respectively. The liposomes were elliptical, and the particle size was 100.91 ± 39.31 nm. The liposome cell intake was significantly increased in Huh-7 cells. The liposomes entered the cell through macropinocytosis and caveolin-mediated endocytosis and were predominantly distributed in the cytoplasm. They exerted an excellent inhibitory effect on Huh-7 cells and promoted tumor cell apoptosis through lipid peroxidation, mitochondrial membrane potential reduction, and cell-cycle blockage. CONCLUSIONS The pH-responsive and liver-targeting drug delivery system for the combination delivery of ART with ATOP showed promising effects on hepatocellular carcinoma (HCC).
Collapse
Affiliation(s)
- Xuwang Pan
- Department of Pharmaceutical Preparation, Affiliated Hangzhou Xixi Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jinsong Huang
- Department of Hepatology, Affiliated Hangzhou Xixi Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Shourong Liu
- Department of Hepatology, Affiliated Hangzhou Xixi Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yidan Shao
- Department of Pharmaceutical Preparation, Affiliated Hangzhou Xixi Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jianjun Xi
- Department of Pharmaceutical Preparation, Affiliated Hangzhou Xixi Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Ruoyu He
- Department of Pharmaceutical Preparation, Affiliated Hangzhou Xixi Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Tingting Shi
- Department of Pharmaceutical Preparation, Affiliated Hangzhou Xixi Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Rangxiao Zhuang
- Department of Pharmaceutical Preparation, Affiliated Hangzhou Xixi Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Wenying Yu
- Key Laboratory of Neuropsychiatric Drug Research of Zhejiang Province, Hangzhou Medical College, Hangzhou, Zhejiang, China
| |
Collapse
|
3
|
Prakash C, Chhikara S, Kumar V. Mitochondrial Dysfunction in Arsenic-Induced Hepatotoxicity: Pathogenic and Therapeutic Implications. Biol Trace Elem Res 2022; 200:261-270. [PMID: 33566285 DOI: 10.1007/s12011-021-02624-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 02/01/2021] [Indexed: 12/16/2022]
Abstract
Mitochondria are vital cellular organelles associated with energy production as well as cell signaling pathways. These organelles, responsible for metabolism, are highly abundant in hepatocytes that make them key players in hepatotoxicity. The literature suggests that mitochondria are targeted by various environmental pollutants. Arsenic, a toxic metalloid known as an environmental pollutant, readily contaminates drinking water and exerts toxic effects. It is toxic to various cellular organs; among them, the liver seems to be most affected. A growing body of evidence suggests that within cells, arsenic is highly toxic to mitochondria and reported to cause oxidative stress and alter an array of signaling pathways and functions. Hence, it is imperative to highlight the mechanisms associated with altered mitochondrial functions and integrity in arsenic-induced liver toxicity. This review provides the details of mechanistic aspects of mitochondrial dysfunction in arsenic-induced hepatotoxicity as well as various ameliorative measures undertaken concerning mitochondrial functions.
Collapse
Affiliation(s)
- Chandra Prakash
- Neurobiology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Sunil Chhikara
- Applied Sciences, UIET, Maharshi Dayanand University, Rohtak, Haryana, 124001, India
| | - Vijay Kumar
- Department of Biochemistry, Maharshi Dayanand University, Rohtak, Haryana, 124001, India.
| |
Collapse
|
4
|
Fang Y, Zhang Z. Arsenic trioxide as a novel anti-glioma drug: a review. Cell Mol Biol Lett 2020; 25:44. [PMID: 32983240 PMCID: PMC7517624 DOI: 10.1186/s11658-020-00236-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 09/15/2020] [Indexed: 02/08/2023] Open
Abstract
Arsenic trioxide has shown a strong anti-tumor effect with little toxicity when used in the treatment of acute promyelocytic leukemia (APL). An effect on glioma has also been shown. Its mechanisms include regulation of apoptosis and autophagy; promotion of the intracellular production of reactive oxygen species, causing oxidative damage; and inhibition of tumor stem cells. However, glioma cells and tissues from other sources show different responses to arsenic trioxide. Researchers are working to enhance its efficacy in anti-glioma treatments and reducing any adverse reactions. Here, we review recent research on the efficacy and mechanisms of action of arsenic trioxide in the treatment of gliomas to provide guidance for future studies.
Collapse
Affiliation(s)
- Yi Fang
- Department of Ultrasound, First Affiliated Hospital of China Medical University, Shenyang, 110001 Liaoning People's Republic of China
| | - Zhen Zhang
- Department of Ultrasound, First Affiliated Hospital of China Medical University, Shenyang, 110001 Liaoning People's Republic of China
| |
Collapse
|
5
|
Fu WR, Chen JL, Li XY, Dong JX, Liu Y. Bidirectional Regulatory Mechanisms of Jaceosidin on Mitochondria Function: Protective Effects of the Permeability Transition and Damage of Membrane Functions. J Membr Biol 2019; 253:25-35. [PMID: 31712855 DOI: 10.1007/s00232-019-00102-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 10/29/2019] [Indexed: 01/20/2023]
Abstract
Many natural products could induce apoptosis through mitochondrial pathways. However, direct interactions between natural products and mitochondria have rarely been reported. In this work, the effects and regulatory mechanisms of Jaceosidin on the isolated rat liver mitochondria have been studied. The results of the experiments which by introducing exogenous Ca2+ illustrated that Jaceosidin has the protective effects on the structure and function of the isolated mitochondria. These protective effects were related to the chelation of Ca2+ with Jaceosidin. Besides, Jaceosidin could scavenge reactive oxygen species produced during electron transport, and weaken the mitochondrial lipid peroxidation rate, which may be attributed to the antioxidant effect of phenolic hydroxyl groups of Jaceosidin. In addition, Jaceosidin has some damage effects on mitochondrial function, such as the inhibition of mitochondrial respiration and the increase of mitochondrial membrane fluidity. These results of this work provided comprehensive information to clarify the mechanisms of Jaceosidin on mitochondria, which may be the bidirectional regulatory mechanisms.
Collapse
Affiliation(s)
- Wen-Rong Fu
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, People's Republic of China
| | - Ji-Lei Chen
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (MOE), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, People's Republic of China
| | - Xue-Yi Li
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, People's Republic of China
| | - Jia-Xin Dong
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, People's Republic of China.
| | - Yi Liu
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (MOE), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, People's Republic of China. .,Key Laboratory of Coal Conversion and New Carbon Materials of Hubei Province, College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, 430081, People's Republic of China. .,Guangxi Key Laboratory of Natural Polymer Chemistry, College of Chemistry and Material Sciences, Nanning Normal University, Nanning, 530001, People's Republic of China.
| |
Collapse
|
6
|
Xiang X, Gao T, Zhang BR, Jiang FL, Liu Y. Surface functional groups affect CdTe QDs behavior at mitochondrial level. Toxicol Res (Camb) 2018; 7:1071-1080. [PMID: 30542601 DOI: 10.1039/c8tx00160j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 08/21/2018] [Indexed: 12/15/2022] Open
Abstract
Quantum dots (QDs) are used in the bio-medical area because of their excellent optical properties. Their biomedical utilization has remained a serious biosecurity concern. Cytotoxicity experiments have shown that QD toxicity is connected to the properties of the QDs. In this paper, the toxicity of QDs was studied from the aspect of surface functional groups at the mitochondrial level. Three types of ligands, thioglycollic acid (TGA), mercaptoethylamine (MEA) and l-cysteine (l-Cys), which have similar structures but different functional groups were used to coat CdTe QDs. The effects of the three types of CdTe QDs on mitochondria were then observed. The experimental results showed the three types of CdTe QDs could impair mitochondrial respiration, destroy membrane potential and induce mitochondrial swelling. Interestingly, MEA-CdTe QDs showed similar effects on membrane potential and mitochondrial swelling as did l-Cys-CdTe QDs, while TGA-CdTe QDs showed stronger effects than that of the two other QDs. Moreover, the three types of CdTe QDs showed significantly different effects on mitochondrial membrane fluidity. MEA-CdTe QDs decreased mitochondrial membrane fluidity, l-Cys-CdTe QDs showed no obvious influence on mitochondrial membrane fluidity and TGA-CdTe QDs increased mitochondrial membrane fluidity. The interaction mechanism of CdTe QDs on mitochondrial permeability transition (MPT) pores as well as Cd2+ release by CdTe QDs were checked to determine the reason for their different effects on mitochondria. The results showed that the impact of the three types of CdTe QDs on mitochondria was not only related to the released metal ion, but also to their interaction with MPT pore proteins. This work emphasizes the importance of surface functional groups in the behavior of CdTe QDs at the sub-cellular level.
Collapse
Affiliation(s)
- Xun Xiang
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (MOE) , College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , P. R. China . ; ; ; Tel: +86-27-68756667
| | - Tao Gao
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (MOE) , College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , P. R. China . ; ; ; Tel: +86-27-68756667
| | - Bo-Rui Zhang
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (MOE) , College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , P. R. China . ; ; ; Tel: +86-27-68756667
| | - Feng-Lei Jiang
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (MOE) , College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , P. R. China . ; ; ; Tel: +86-27-68756667
| | - Yi Liu
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (MOE) , College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , P. R. China . ; ; ; Tel: +86-27-68756667.,College of Chemistry and Chemical Engineering , Wuhan University of Science and Technology , Wuhan 430081 , PR China.,College of Chemistry and Material Science , Guangxi Teachers Education University , Nanning , 530001 , PR China
| |
Collapse
|
7
|
Xiang X, Wu C, Zhang BR, Gao T, Zhao J, Ma L, Jiang FL, Liu Y. The relationship between the length of surface ligand and effects of CdTe quantum dots on the physiological functions of isolated mitochondria. CHEMOSPHERE 2017; 184:1108-1116. [PMID: 28672691 DOI: 10.1016/j.chemosphere.2017.06.091] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 06/16/2017] [Accepted: 06/20/2017] [Indexed: 06/07/2023]
Abstract
The potential toxicity of Quantum dots (QDs) should be assessed comprehensively for their fast spreading applications. Many studies have shown the toxicity of QDs is associated with their surface ligands. In this work, two analog ligands with one carbon difference, 2-mercaptoacetic acid (TGA) and 3-mercaptopropionic acid (MPA) were used as coating materials in the syntheses of two types of CdTe QDs with similar physicochemical properties. Then the biological effects of QDs on isolated mitochondria were studied. It was found that the two types of QDs could impair mitochondrial respiration and induce mitochondrial permeability transition (MPT). However, as compared with TGA-CdTe QDs, MPA-CdTe QDs had a stronger effect on MPT. The weaker effect of TGA-CdTe QDs on MPT might be owing to their better stability and thus less amount of released Cd2+, which could be further explained by the stronger affinity between the ligand (TGA) and the cadmium complexes in the crystal growth of QDs. These results highlighted the importance of ligands responsible for the toxicity of QDs at the sub-cellular level.
Collapse
Affiliation(s)
- Xun Xiang
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China
| | - Can Wu
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China; College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, PR China
| | - Bo-Rui Zhang
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China
| | - Tao Gao
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China
| | - Jie Zhao
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China
| | - Long Ma
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China
| | - Feng-Lei Jiang
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China.
| | - Yi Liu
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China; College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, PR China.
| |
Collapse
|
8
|
Arsenite Effects on Mitochondrial Bioenergetics in Human and Mouse Primary Hepatocytes Follow a Nonlinear Dose Response. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:9251303. [PMID: 28163822 PMCID: PMC5253485 DOI: 10.1155/2017/9251303] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 11/10/2016] [Accepted: 11/20/2016] [Indexed: 01/27/2023]
Abstract
Arsenite is a known carcinogen and its exposure has been implicated in a variety of noncarcinogenic health concerns. Increased oxidative stress is thought to be the primary cause of arsenite toxicity and the toxic effect is thought to be linear with detrimental effects reported at all concentrations of arsenite. But the paradigm of linear dose response in arsenite toxicity is shifting. In the present study we demonstrate that arsenite effects on mitochondrial respiration in primary hepatocytes follow a nonlinear dose response. In vitro exposure of primary hepatocytes to an environmentally relevant, moderate level of arsenite results in increased oxidant production that appears to arise from changes in the expression and activity of respiratory Complex I of the mitochondrial proton circuit. In primary hepatocytes the excess oxidant production appears to elicit adaptive responses that promote resistance to oxidative stress and a propensity to increased proliferation. Taken together, these results suggest a nonlinear dose-response characteristic of arsenite with low-dose arsenite promoting adaptive responses in a process known as mitohormesis, with transient increase in ROS levels acting as transducers of arsenite-induced mitohormesis.
Collapse
|
9
|
Flora SJS. Arsenic and dichlorvos: Possible interaction between two environmental contaminants. J Trace Elem Med Biol 2016; 35:43-60. [PMID: 27049126 DOI: 10.1016/j.jtemb.2016.01.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Revised: 01/04/2016] [Accepted: 01/26/2016] [Indexed: 02/01/2023]
Abstract
Metals are ubiquitously present in the environment and pesticides are widely used throughout the world. Environmental and occupational exposure to metal along with pesticide is an area of great concern to both the public and regulatory authorities. Our major concern is that combination of these toxicant present in environment may elicit toxicity either due to additive or synergistic interactions or 'joint toxic actions' among these toxicants. It poses a rising threat to human health. Water contamination particularly ground water contamination with arsenic is a serious problem in today's scenario since arsenic is associated with several kinds of health problems, such arsenic associated health anomalies are commonly called as 'Arsenism'. Uncontrolled use and spillage of pesticides into the environment has resulted in alarming situation. Moreover serious concerns are being addressed due to their persistence in the environmental matrices such as air, soil and surface water runoff resulting in continuous exposure of these harmful chemicals to human beings and animals. Bio-availability of these environmental toxicants has been enhanced much due to anthropological activities. Dreadfully very few studies are available on combined exposures to these toxicants on the animal or human system. Studies on the acute and chronic exposure to arsenic and DDVP are well reported and well defined. Arsenic is a common global ground water contaminant while dichlorvos is one of the most commonly and widely employed organophosphate based insecticide used in agriculture, horticulture etc. There is thus a real situation where a human may get exposed to these toxicants while working in a field. This review highlights the individual and combined exposure to arsenic and dichlorvos on health.
Collapse
Affiliation(s)
- Swaran J S Flora
- Division of Regulatory Toxicology, Defence Research and Development Establishment, Jhansi Road, Gwalior 474002, India.
| |
Collapse
|