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Das A, Mitra A, Ghosh S, Sarkar S, Pal PK, Bandyopadhyay D, Chattopadhyay S. Arsenic-induced transition of thymic inflammation-to-fibrosis involves Stat3-Twist1 interaction: Melatonin to the rescue. Biofactors 2024. [PMID: 39096306 DOI: 10.1002/biof.2110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 07/19/2024] [Indexed: 08/05/2024]
Abstract
Groundwater arsenic is a notorious toxicant and exposure to environmentally relevant concentrations persists as a healthcare burden across the world. Arsenic has been reported to jeopardize the normal functioning of the immune system, but there are still gaps in the understanding of thymic T cell biology. Immunotoxic influence of arsenic in thymic integrity demands a potent restorative molecule. The objectives of this study were to examine key signaling cross-talks associated with arsenic-induced immune alterations in the thymus and propose melatonin as a potential candidate against immunological complications arising from arsenic exposure. Swiss albino mice were exposed to sodium arsenite (0.05 mg/L; in drinking water) and melatonin (IP:10 mg/kg BW) for 28 days. Melatonin successfully protected thymus from arsenic-mediated tissue degeneration and maintained immune homeostasis including T cell maturation and proliferation by mitigating oxidative stress through Nrf2 upregulation. Additionally, melatonin exerted ameliorative effect against arsenic-induced apoptosis and inflammation by inhibiting p53-mediated mitochondrial cell death pathway and NF-κB-p65/STAT3-mediated proinflammatory pathway, respectively. For the first time, we showed that arsenic-induced profibrotic changes were inhibited by melatonin through targeting of inflammation-associated EMT. Our findings clearly demonstrate that melatonin can be a viable and promising candidate in combating arsenic-induced immune toxicity with no collateral damage, making it an important research target.
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Affiliation(s)
- Ankur Das
- Department of Physiology, University of Calcutta, Kolkata, India
| | - Ankan Mitra
- Department of Physiology, University of Calcutta, Kolkata, India
| | - Sourav Ghosh
- Department of Physiology, University of Calcutta, Kolkata, India
| | - Swaimanti Sarkar
- Department of Physiology, University of Calcutta, Kolkata, India
| | - Palash Kumar Pal
- Department of Physiology, University of Calcutta, Kolkata, India
| | | | - Sreya Chattopadhyay
- Department of Physiology, University of Calcutta, Kolkata, India
- Centre for Research in Nanoscience and Nanotechnology (CRNN), University of Calcutta, Kolkata, India
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Zhang R, Tu L, Yang Y, Sun J, Liang T, Li Y, Chen R, Chen B, Luan T. Altered generation pattern of reactive oxygen species triggering DNA and plasma membrane damages to human liver cells treated with arsenite. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 900:165821. [PMID: 37506919 DOI: 10.1016/j.scitotenv.2023.165821] [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: 05/30/2023] [Revised: 07/11/2023] [Accepted: 07/24/2023] [Indexed: 07/30/2023]
Abstract
Human exposure to arsenic via drinking water is one of globally concerned health issues. Oxidative stress is regarded as the denominator of arsenic-inducing toxicities. Therefore, to identify intracellular sources of reactive oxygen species (ROS) could be essential for addressing the detrimental effects of arsenite (iAsIII). In this study, the contributions of different pathways to ROS formation in iAsIII-treated human normal liver (L-02) cells were quantitatively assessed, and then concomitant oxidative impairs were evaluated using metabolomics and lipidomics approaches. Following iAsIII treatment, NADPH oxidase (NOX) activity and expression levels of p47phox and p67phox were upregulated, and NOX-derived ROS contributed to almost 60.0 % of the total ROS. Moreover, iAsIII also induced mitochondrial superoxide anion and impaired mitochondrial respiratory function of L-02 cells with a decreasing ATP production. The inhibition of NOX activity significantly rescued mitochondrial membrane potential in iAsIII-treated L-02 cells. Purine and glycerophospholipids metabolisms in L-02 cells were disrupted by iAsIII, which might be used to represent DNA and plasma membrane damages, respectively. Our study supported that NOX could be the primary pathway of ROS overproduction and revealed the potential mechanisms of iAsIII toxicity related to oxidative stress.
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Affiliation(s)
- Ruijia Zhang
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Lanyin Tu
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Yuanzhu Yang
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Jin Sun
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
| | - Tong Liang
- Intensive Care Unit, Guangzhou Eighth People's Hospital, Guangzhou 510440, China
| | - Yizheng Li
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
| | - Ruohong Chen
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Baowei Chen
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China.
| | - Tiangang Luan
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China; Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China.
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3
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Effects of Prenatal Exposure to Arsenic on T Cell Development in Children. CURRENT OPINION IN TOXICOLOGY 2023. [DOI: 10.1016/j.cotox.2023.100389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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4
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Linear non-threshold (LNT) fails numerous toxicological stress tests: Implications for continued policy use. Chem Biol Interact 2022; 365:110064. [DOI: 10.1016/j.cbi.2022.110064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 06/24/2022] [Accepted: 07/18/2022] [Indexed: 11/16/2022]
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Tsakanova G, Babayan N, Karalova E, Hakobyan L, Abroyan L, Avetisyan A, Avagyan H, Hakobyan S, Poghosyan A, Baghdasaryan B, Arakelova E, Ayvazyan V, Matevosyan L, Navasardyan A, Davtyan H, Apresyan L, Yeremyan A, Aroutiounian R, Osipov AN, Grigoryan B, Karalyan Z. Low-Energy Laser-Driven Ultrashort Pulsed Electron Beam Irradiation-Induced Immune Response in Rats. Int J Mol Sci 2021; 22:ijms222111525. [PMID: 34768958 PMCID: PMC8584044 DOI: 10.3390/ijms222111525] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 10/18/2021] [Accepted: 10/20/2021] [Indexed: 11/16/2022] Open
Abstract
The development of new laser-driven electron linear accelerators, providing unique ultrashort pulsed electron beams (UPEBs) with low repetition rates, opens new opportunities for radiotherapy and new fronts for radiobiological research in general. Considering the growing interest in the application of UPEBs in radiation biology and medicine, the aim of this study was to reveal the changes in immune system in response to low-energy laser-driven UPEB whole-body irradiation in rodents. Forty male albino Wistar rats were exposed to laser-driven UPEB irradiation, after which different immunological parameters were studied on the 1st, 3rd, 7th, 14th, and 28th day after irradiation. According to the results, this type of irradiation induces alterations in the rat immune system, particularly by increasing the production of pro- and anti-inflammatory cytokines and elevating the DNA damage rate. Moreover, such an immune response reaches its maximal levels on the third day after laser-driven UPEB whole-body irradiation, showing partial recovery on subsequent days with a total recovery on the 28th day. The results of this study provide valuable insight into the effect of laser-driven UPEB whole-body irradiation on the immune system of the animals and support further animal experiments on the role of this novel type of irradiation.
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Affiliation(s)
- Gohar Tsakanova
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
- CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
- Correspondence: ; Tel.: +374-941-23070
| | - Nelly Babayan
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
- Department of Genetics and Cytology, Faculty of Biology, Yerevan State University, Yerevan 0025, Armenia
| | - Elena Karalova
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
- Experimental Laboratory, Yerevan State Medical University after Mkhitar Heratsi, Yerevan 0025, Armenia
| | - Lina Hakobyan
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
| | - Liana Abroyan
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
| | - Aida Avetisyan
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
- Experimental Laboratory, Yerevan State Medical University after Mkhitar Heratsi, Yerevan 0025, Armenia
| | - Hranush Avagyan
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
- Experimental Laboratory, Yerevan State Medical University after Mkhitar Heratsi, Yerevan 0025, Armenia
| | - Sona Hakobyan
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
| | - Arpine Poghosyan
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
| | - Bagrat Baghdasaryan
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
| | - Elina Arakelova
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
- CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
| | - Violetta Ayvazyan
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
| | - Lusine Matevosyan
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
- CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
| | - Arpine Navasardyan
- CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
| | - Hakob Davtyan
- CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
| | - Lilit Apresyan
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
| | - Arsham Yeremyan
- CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
| | - Rouben Aroutiounian
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
- Department of Genetics and Cytology, Faculty of Biology, Yerevan State University, Yerevan 0025, Armenia
| | - Andreyan N. Osipov
- Group for Radiation Biochemistry of Nucleic Acids, N.N. Semenov Federal Research for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia;
- Laboratory for the Development of Innovative Drugs and Agricultural Biotechnology, Moscow Institute of Physics and Technology, 141701 Moscow, Russia
- Experimental Radiobiology and Radiation Medicine Department, State Research Center—Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, 123098 Moscow, Russia
| | - Bagrat Grigoryan
- CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
| | - Zaven Karalyan
- Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
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Ma H, Song X, Huang P, Zhang W, Ling X, Yang X, Wu W, Xu H, Wang W. Myricetin protects natural killer cells from arsenite induced DNA damage by attenuating oxidative stress and retaining poly(ADP-Ribose) polymerase 1 activity. Mutat Res 2021; 865:503337. [PMID: 33865543 DOI: 10.1016/j.mrgentox.2021.503337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 01/30/2021] [Accepted: 02/17/2021] [Indexed: 12/11/2022]
Abstract
Environmental exposure to arsenite (As+3) is known to induce immunotoxicity. Natural killer (NK) cells are innate lymphoid cells act as professional killers of tumor cells. Our previous report indicated that 500 ppb As+3 drinking water exposure induced significant DNA damage in the NK cells of C57BL/6 mice. Myricetin is a plant-derived flavonoid known as a strong antioxidant. In this study, daily administration of myricetin at 20 mg/kg was found to alleviate the cell population decrease and DNA damage in the NK cells of BALB/c mice exposed to 500 and 1000 ppb As+3 via drinking water. Oxidative stress and poly(ADP-ribose) polymerase 1 (PARP-1) inhibition were induced by As+3 at 1 and 2 μM in isolated mouse NK cells in vitro, which were attenuated by 20 μM myricetin. The mitigatory effect of myricetin on the PARP-1 inhibition in NK cells treated with As+3 was also found to be the result of its prevention of the zinc loss induced by As+3 on PARP-1. Collectively, these results demonstrated, for the first time, that myricetin could protect NK cells from As+3 induced DNA through attenuating oxidative stress and retaining PARP-1 activity, indicating that myricetin may be utilized for the prevention of the immunotoxicity induced by As+3 in NK cells.
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Affiliation(s)
- Huijuan Ma
- East China University of Science and Technology, State Key Laboratory of Bioreactor Engineering, Shanghai, 200237, China; East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai, 200237, China
| | - Xiaodong Song
- Medical Laboratory Department, Hua Shan Hospital North, Fudan University, Shanghai, 201907, China
| | - Ping Huang
- East China University of Science and Technology, State Key Laboratory of Bioreactor Engineering, Shanghai, 200237, China; East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai, 200237, China
| | - Weiwei Zhang
- East China University of Science and Technology, State Key Laboratory of Bioreactor Engineering, Shanghai, 200237, China; East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai, 200237, China
| | - Xinyue Ling
- East China University of Science and Technology, State Key Laboratory of Bioreactor Engineering, Shanghai, 200237, China; East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai, 200237, China
| | - Xiaoning Yang
- East China University of Science and Technology, State Key Laboratory of Bioreactor Engineering, Shanghai, 200237, China; East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai, 200237, China
| | - Wenwei Wu
- East China University of Science and Technology, State Key Laboratory of Bioreactor Engineering, Shanghai, 200237, China; East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai, 200237, China
| | - Huan Xu
- East China University of Science and Technology, State Key Laboratory of Bioreactor Engineering, Shanghai, 200237, China; East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai, 200237, China.
| | - Wei Wang
- East China University of Science and Technology, State Key Laboratory of Bioreactor Engineering, Shanghai, 200237, China; East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai, 200237, China; Department of Pharmacology and Toxicology and BIO5 Institute, University of Arizona, Tucson, AZ, 85721-0207, USA.
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Medina S, Zhou X, Lauer FT, Zhang H, Liu KJ, Lewis J, Burchiel SW. Modulation of PARP activity by Monomethylarsonous (MMA +3) acid and uranium in mouse thymus. Toxicol Appl Pharmacol 2021; 411:115362. [PMID: 33279514 PMCID: PMC7855914 DOI: 10.1016/j.taap.2020.115362] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 11/02/2020] [Accepted: 12/01/2020] [Indexed: 01/01/2023]
Abstract
Arsenic exposure is well established to impair the function of zinc finger proteins, including PARP-1. Previous studies from our lab show that early developing T cells in the thymus are very sensitive to arsenite (As+3)-induced genotoxicity mediated through PARP-1 inhibition. Additionally, it has been shown that uranium (in the form of uranyl acetate, UA) also suppresses PARP-1 activity in HEK cells. However, very little is known about whether the As+3 metabolite, monomethylarsonous acid (MMA+3), also inhibits PARP-1 activity and if this is modified by combined exposures with other metals, such as uranium. In the present study, we found that MMA+3 significantly suppressed PARP-1 function, whereas UA at high concentrations significantly increased PARP-1 activity. To evaluate whether the effects on PARP-1 activity were mediated through oxidative stress, we measured the induction of hemoxygenase-1 (Hmox-1) expression by qPCR. MMA+3, but not UA, significantly induced oxidative stress; however, the inhibition of PARP-1 produced by MMA+3 was not reversed by the addition of the antioxidant, Tempol. Further evaluation revealed minimal interactive effects of MMA+3 and UA on PARP-1 function. Collectively, our results show that contrary to As+3, the suppressive effects of MMA+3 on PARP-1 were not substantially driven by oxidative stress. in mouse thymus cells. Results for this study provide important insights into the effects of MMA+3 and uranium exposures on PARP-1 function, which is essential for future studies focused on understanding the effects of complex environmentally relevant metal mixtures.
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Affiliation(s)
- Sebastian Medina
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, Albuquerque, NM, USA; Department of Biology, New Mexico Highlands University, Las Vegas, NM, USA
| | - Xixi Zhou
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Fredine T Lauer
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Haikun Zhang
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Ke Jian Liu
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Johnnye Lewis
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Scott W Burchiel
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, Albuquerque, NM, USA.
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Medina S, Lauer FT, Castillo EF, Bolt AM, Ali AMS, Liu KJ, Burchiel SW. Exposures to uranium and arsenic alter intraepithelial and innate immune cells in the small intestine of male and female mice. Toxicol Appl Pharmacol 2020; 403:115155. [PMID: 32710956 PMCID: PMC7490749 DOI: 10.1016/j.taap.2020.115155] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/12/2020] [Accepted: 07/18/2020] [Indexed: 12/25/2022]
Abstract
Human exposures to environmental metals, including uranium (U) and arsenic (As) are a global public health concern. Chronic exposures to U and As are linked to many adverse health effects including, immune suppression and autoimmunity. The gastrointestinal (GI) tract is home to many immune cells vital in the maintenance of systemic immune health. However, very little is known about the immunotoxicity of U and As at this site. The present study examined the burden of U and As exposure in the GI tract as well as the resultant immunotoxicity to intraepithelial lymphocytes (IELs) and innate immune cells of the small intestine following chronic drinking water exposures of male and female mice to U (in the form of uranyl acetate, UA) and As (in the form of sodium arsenite, As3+). Exposure to U or As3+ resulted in high levels of U or As in the GI tract of male and female mice, respectively. A reduction of small intestinal CD4+ IELs (TCRαβ+, CD8αα+) was found following As3+ exposure, whereas U produced widespread suppression of CD4- IEL subsets (TCRαβ+ and TCRγδ+). Evaluation of innate immune cell subsets in the small intestinal lamina propria revealed a decrease in mature macrophages, along with a corresponding increase in immature/proinflammatory macrophages following As3+ exposures. These data show that exposures to two prevalent environmental contaminants, U and As produce significant immunotoxicity in the GI tract. Collectively, these findings provide a critical framework for understanding the underlying immune health issues reported in human populations chronically exposed to environmental metals.
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Affiliation(s)
- Sebastian Medina
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Fredine T Lauer
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Eliseo F Castillo
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, The University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Alicia M Bolt
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Abdul-Mehdi S Ali
- Department of Department of Earth and Planetary Sciences, The University of New Mexico, Albuquerque, NM, USA
| | - Ke Jian Liu
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Scott W Burchiel
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, NM, USA.
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Lou K, Huang P, Ma H, Wang X, Xu H, Wang W. Orlistat increases arsenite tolerance in THP-1 derived macrophages through the up-regulation of ABCA1. Drug Chem Toxicol 2019; 45:274-282. [PMID: 31665930 DOI: 10.1080/01480545.2019.1683571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Orlistat is an FDA-approved over-the-counter drug to treat obesity through the inhibition of lipase activity. Macrophages, which express high levels of lipoprotein lipase (LPL), are important phagocytes in the innate immune system. Our previous studies indicated that environmentally relevant concentrations of arsenite (As+3) could inhibit the major immune functions of macrophages. As the down-regulation of LPL is known to increase the expression of ABCA1, the cholesterol exporter demonstrated to be related to the resistance of arsenic toxicity. We examined if orlistat could reverse the inhibitive effects of As+3 on macrophage functions. The results showed that 50 μM orlistat reversed As+3-induced suppressions on phagocytosis, NO production and cytokine secretion in THP-1 derived macrophages. The expression of ABCA1 was significantly increased by orlistat in As+3 co-treated macrophages, which was associated with decreased intracellular As+3 levels. Collectively, these results indicated that orlistat could reverse the suppressive effects induced by As+3 in macrophages through the increased expression of ABCA1, which has the potential to be developed as a therapeutic agent for arsenic-induced immunosuppression.
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Affiliation(s)
- Kaiyan Lou
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China.,Department of Pharmaceutical Sciences, School of Pharmacy, East China University of Science and Technology, Shanghai, China
| | - Ping Huang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China.,Department of Pharmaceutical Sciences, School of Pharmacy, East China University of Science and Technology, Shanghai, China
| | - Huijuan Ma
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China.,Department of Pharmaceutical Sciences, School of Pharmacy, East China University of Science and Technology, Shanghai, China
| | - Xiaolei Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China.,Department of Pharmaceutical Sciences, School of Pharmacy, East China University of Science and Technology, Shanghai, China
| | - Huan Xu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China.,Department of Pharmaceutical Sciences, School of Pharmacy, East China University of Science and Technology, Shanghai, China
| | - Wei Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China.,Department of Pharmaceutical Sciences, School of Pharmacy, East China University of Science and Technology, Shanghai, China.,Department of Pharmacology and Toxicology and BIO5 Institute, University of Arizona, Tucson, AZ, USA
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10
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Cao AL, Beaver LM, Wong CP, Hudson LG, Ho E. Zinc deficiency alters the susceptibility of pancreatic beta cells (INS-1) to arsenic exposure. Biometals 2019; 32:845-859. [PMID: 31542844 DOI: 10.1007/s10534-019-00217-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 09/14/2019] [Indexed: 02/06/2023]
Abstract
Pancreatic beta cells produce and release insulin, a hormone that regulates blood glucose levels, and their dysfunction contributes to the development of diabetes mellitus. Zinc deficiency and inorganic arsenic exposure both independently associate with the development of diabetes, although the effects of their combination on pancreatic beta cell health and function remain unknown. We hypothesized zinc deficiency increases the toxicity associated with arsenic exposure, causing an increased susceptibility to DNA damage and disruption of insulin production. Zinc deficiency decreased cell proliferation by 30% in pancreatic INS-1 rat insulinoma cells. Arsenic exposure (0, 50 or 500 ppb exposures) significantly decreased cell proliferation, and increased mRNA levels of genes involved in stress response (Mt1, Mt2, Hmox1) and DNA damage (p53, Ogg1). When co-exposed to both zinc deficiency and arsenic, zinc deficiency attenuated this response to arsenic, decreasing the expression of Mt1, Hmox1, and Ogg1, and significantly increasing DNA double-strand breaks 2.9-fold. Arsenic exposure decreased insulin expression, but co-exposure did not decrease insulin levels beyond the arsenic alone condition, but did result in a further 33% decline in cell proliferation at the 500 ppb arsenic dose, and a significant increase in beta cell apoptosis. These results suggest zinc deficiency and arsenic, both independently and in combination, adversely affect pancreatic beta cell health and both factors should be considered in the evaluation of health outcomes for susceptible populations.
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Affiliation(s)
- Annie L Cao
- School of Biological and Population Health Sciences, Oregon State University, 103 Milam Hall, Corvallis, OR, 97331, USA
| | - Laura M Beaver
- School of Biological and Population Health Sciences, Oregon State University, 103 Milam Hall, Corvallis, OR, 97331, USA.,Linus Pauling Institute, Oregon State University, 307 Linus Pauling Science Center, Corvallis, OR, 97331, USA
| | - Carmen P Wong
- School of Biological and Population Health Sciences, Oregon State University, 103 Milam Hall, Corvallis, OR, 97331, USA.,Linus Pauling Institute, Oregon State University, 307 Linus Pauling Science Center, Corvallis, OR, 97331, USA
| | - Laurie G Hudson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, NM, 87131, USA
| | - Emily Ho
- School of Biological and Population Health Sciences, Oregon State University, 103 Milam Hall, Corvallis, OR, 97331, USA. .,Linus Pauling Institute, Oregon State University, 307 Linus Pauling Science Center, Corvallis, OR, 97331, USA. .,Moore Family Center for Whole Grain Foods, Nutrition and Preventive Health, Oregon State University, 103 Milam Hall, Corvallis, OR, 97331, USA.
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11
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Navasumrit P, Chaisatra K, Promvijit J, Parnlob V, Waraprasit S, Chompoobut C, Binh TT, Hai DN, Bao ND, Hai NK, Kim KW, Samson LD, Graziano JH, Mahidol C, Ruchirawat M. Exposure to arsenic in utero is associated with various types of DNA damage and micronuclei in newborns: a birth cohort study. Environ Health 2019; 18:51. [PMID: 31174534 PMCID: PMC6555940 DOI: 10.1186/s12940-019-0481-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 04/16/2019] [Indexed: 05/07/2023]
Abstract
BACKGROUND Growing evidence indicates that in utero arsenic exposures in humans may increase the risk of adverse health effects and development of diseases later in life. This study aimed to evaluate potential health risks of in utero arsenic exposure on genetic damage in newborns in relation to maternal arsenic exposure. METHODS A total of 205 pregnant women residing in arsenic-contaminated areas in Hanam province, Vietnam, were recruited. Prenatal arsenic exposure was determined by arsenic concentration in mother's toenails and urine during pregnancy and in umbilical cord blood collected at delivery. Genetic damage in newborns was assessed by various biomarkers of early genetic effects including oxidative/nitrative DNA damage (8-hydroxydeoxyguanosine, 8-OHdG, and 8-nitroguanine), DNA strand breaks and micronuclei (MN) in cord blood. RESULTS Maternal arsenic exposure, measured by arsenic levels in toenails and urine, was significantly increased (p < 0.05) in subjects residing in areas with high levels of arsenic contamination in drinking water. Cord blood arsenic level was significantly increased in accordance with maternal arsenic exposure (p < 0.001). Arsenic exposure in utero is associated with genotoxic effects in newborns indicated as increased levels of 8-OHdG, 8-nitroguanine, DNA strand breaks and MN frequency in cord blood with increasing levels of maternal arsenic exposure. Maternal toenail arsenic level was significantly associated with all biomarkers of early genetic effects, while cord blood arsenic levels associated with DNA strand breaks and MN frequency. CONCLUSIONS In utero arsenic exposure is associated with various types of genetic damage in newborns potentially contributing to the development of diseases, including cancer, later in life.
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Affiliation(s)
- Panida Navasumrit
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
- Center of Excellence on Environmental Health and Toxicology, CHE, Ministry of Education, Ratchathewi, Bangkok, 10400 Thailand
| | - Krittinee Chaisatra
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
| | - Jeerawan Promvijit
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
| | - Varabhorn Parnlob
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
| | - Somchamai Waraprasit
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
| | - Chalida Chompoobut
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
| | - Ta Thi Binh
- National Institute of Occupational and Environmental Health, Hanoi, Vietnam
| | - Doan Ngoc Hai
- National Institute of Occupational and Environmental Health, Hanoi, Vietnam
| | - Nguyen Duy Bao
- National Institute of Occupational and Environmental Health, Hanoi, Vietnam
| | - Nguyen Khac Hai
- National Institute of Occupational and Environmental Health, Hanoi, Vietnam
| | - Kyoung-Woong Kim
- International Environmental Research Center, Gwangju Institute of Science and Technology, Gwangju, South Korea
| | - Leona D. Samson
- Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, USA
| | - Joseph H. Graziano
- Department of Environmental Health Sciences, Columbia University, New York, USA
| | - Chulabhorn Mahidol
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
| | - Mathuros Ruchirawat
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
- Center of Excellence on Environmental Health and Toxicology, CHE, Ministry of Education, Ratchathewi, Bangkok, 10400 Thailand
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12
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Bolt AM, Medina S, Lauer FT, Liu KJ, Burchiel SW. Minimal uranium immunotoxicity following a 60-day drinking water exposure to uranyl acetate in male and female C57BL/6J mice. Toxicol Appl Pharmacol 2019; 372:33-39. [PMID: 30978399 DOI: 10.1016/j.taap.2019.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 04/03/2019] [Accepted: 04/05/2019] [Indexed: 12/21/2022]
Abstract
Historical uranium (U) mining in the Southwestern United States resulted in significant environmental contamination throughout this region and presents a significant risk of chronic metal exposure and toxicity for communities living in close proximity to mine waste sites. Uranium exposure is associated with numerous deleterious health effects including immune dysfunction; however, its effects on the immune system have yet to be fully characterized. We recently published that drinking water exposure to U, in the form of uranyl acetate (UA), results in low overall tissue retention of U (<0.01%), with very little accumulation in immune organs (blood, bone marrow, spleen, and thymus) of male and female mice. In the present study we characterized the immunotoxicity of U, in the form of UA, following a 60-day drinking water exposure to 5 and 50 ppm in male and female C57BL/6J mice. The following immunotoxicity endpoints were evaluated: hematology, immune tissue weights and total cell recoveries, immunophenotying of the spleen and thymus, and immune cell function (lymphocyte mitogenesis and T-dependent antibody response). Uranium exposure had subtle impacts on the immune endpoints evaluated, likely due to low U accumulation at these sites. The only significant alterations were a slight decrease in the percentages of splenic natural killer T-cells and macrophages in exposed male mice. Despite minimal immunological effects, this study highlights the importance of investigating toxicological endpoints in both sexes and developing accurate animal models that model epidemiological exposures in the future.
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Affiliation(s)
- Alicia M Bolt
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States of America.
| | - Sebastian Medina
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States of America
| | - Fredine T Lauer
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States of America
| | - Ke Jian Liu
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States of America
| | - Scott W Burchiel
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States of America
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13
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Wu S, Xia X, Wang D, Zhou Z, Wang G. Gene function and expression regulation of RuvRCAB in bacterial Cr(VI), As(III), Sb(III), and Cd(II) resistance. Appl Microbiol Biotechnol 2019; 103:2701-2713. [DOI: 10.1007/s00253-019-09666-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 01/23/2019] [Accepted: 01/24/2019] [Indexed: 12/24/2022]
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14
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Xu H, Wang X, Wang W. Functional suppression of macrophages derived from THP-1 cells by environmentally-relevant concentrations of arsenite. Comp Biochem Physiol C Toxicol Pharmacol 2018; 214:36-42. [PMID: 30189257 DOI: 10.1016/j.cbpc.2018.08.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 08/27/2018] [Accepted: 08/31/2018] [Indexed: 01/16/2023]
Abstract
Environmental exposure to arsenic is known to induce immunotoxicity. Macrophages are the professional phagocytes that are important in the immune system. In this study, we utilized the macrophages derived from the THP-1 human monocyte cell line as the experimental model to study the functional suppression induced by arsenite (As+3), one of the most prevalent forms of inorganic arsenic, at environmentally-relevant concentrations. Apoptosis was observed in the THP-1 derived macrophages treated with 500 nM As+3 for 18 h. Suppression of phagocytosis was induced by 18 h As+3 treatment starting from 100 nM. Suppressive effects on the production of two pro-inflammatory cytokines, IL-1β and TNF-α, were also found with the treatment of low to moderate doses of As+3 in lipopolysaccharides-stimulated THP-1 derived macrophages. The nitric oxide production was also inhibited by As+3 treatments, which was negatively correlated with the production of superoxide. Collectively, the results from the study demonstrated that environmentally-relevant concentrations of As+3 induced cytotoxicity and suppressed the major cellular functions in THP-1 derived macrophages. The macrophages were showed to be relatively sensitive to As+3, and could be the essential target of the toxicity induced by environmental arsenic exposures.
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Affiliation(s)
- Huan Xu
- East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai 200237, China; East China University of Science and Technology, State Key Laboratory of Bioreactor Engineering, Shanghai 200237, China.
| | - Xiaolei Wang
- East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai 200237, China
| | - Wei Wang
- East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai 200237, China; East China University of Science and Technology, State Key Laboratory of Bioreactor Engineering, Shanghai 200237, China; University of New Mexico, Department of Chemistry and Chemical Biology, Albuquerque, NM 87131, USA.
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15
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Xu H, Wang X, Burchiel SW. Toxicity of environmentally-relevant concentrations of arsenic on developing T lymphocyte. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 62:107-113. [PMID: 29986278 DOI: 10.1016/j.etap.2018.07.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 07/02/2018] [Indexed: 05/14/2023]
Abstract
Arsenic is a ubiquitous environmental contaminant that exists in many inorganic and organic forms. In particular, arsenite is known to induce immunotoxicity in humans and animals. There are still major gaps in our understanding of the mechanism(s) of the immunotoxicity induced by arsenic at environmentally-relevant concentrations. T cells are an essential part of the immune system required for host resistance to infections and protection from cancer. Developing T cells in the thymus have been shown to be particularly prone to arsenite-induced toxicity at low concentrations. Suppression of DNA repair proteins and oxidative stress have been identified as a mechanism of genotoxicity that occurs at low to moderate concentrations. Inhibition of the IL-7 signaling pathway was thought to be responsible for the non-genotoxicity induced by low to moderate doses of arsenic. Interestingly, T cells at different stages of their development had distinct sensitivities to arsenite, which was regulated by arsenite exporters. The current evidence strongly suggests that low to moderate doses of arsenic induces toxic effects in the developing T cells and accumulates to highest levels in the early cells that are least capable to pump out arsenic, which may be the mechanism of the high arsenic sensitivity. Therefore, quantification of the exposure levels should be encouraged in future arsenic toxicity studies.
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Affiliation(s)
- Huan Xu
- East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai, 200237, China.
| | - Xiaolei Wang
- East China University of Science and Technology, School of Pharmacy, Department of Pharmaceutical Sciences, Shanghai, 200237, China
| | - Scott W Burchiel
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM, 87131, USA.
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16
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Monomethylarsonous acid: Induction of DNA damage and oxidative stress in mouse natural killer cells at environmentally-relevant concentrations. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2018; 832-833:1-6. [DOI: 10.1016/j.mrgentox.2018.05.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/21/2018] [Accepted: 05/21/2018] [Indexed: 12/11/2022]
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17
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Beaver LM, Truong L, Barton CL, Chase TT, Gonnerman GD, Wong CP, Tanguay RL, Ho E. Combinatorial effects of zinc deficiency and arsenic exposure on zebrafish (Danio rerio) development. PLoS One 2017; 12:e0183831. [PMID: 28837703 PMCID: PMC5570330 DOI: 10.1371/journal.pone.0183831] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Accepted: 08/11/2017] [Indexed: 11/19/2022] Open
Abstract
Zinc deficiency and chronic low level exposures to inorganic arsenic in drinking water are both significant public health concerns that affect millions of people including pregnant women. These two conditions can co-exist in the human population but little is known about their interaction, and in particular, whether zinc deficiency sensitizes individuals to arsenic exposure and toxicity, especially during critical windows of development. To address this, we utilized the Danio rerio (zebrafish) model to test the hypothesis that parental zinc deficiency sensitizes the developing embryo to low-concentration arsenic toxicity, leading to altered developmental outcomes. Adult zebrafish were fed defined zinc deficient and zinc adequate diets and were spawned resulting in zinc adequate and zinc deficient embryos. The embryos were treated with environmentally relevant concentrations of 0, 50, and 500 ppb arsenic. Arsenic exposure significantly reduced the amount of zinc in the developing embryo by ~7%. The combination of zinc deficiency and low-level arsenic exposures did not sensitize the developing embryo to increased developmental malformations or mortality. The combination did cause a 40% decline in physical activity of the embryos, and this decline was significantly greater than what was observed with zinc deficiency or arsenic exposure alone. Significant changes in RNA expression of genes that regulate zinc homeostasis, response to oxidative stress and insulin production (including zip1, znt7, nrf2, ogg1, pax4, and insa) were found in zinc deficient, or zinc deficiency and arsenic exposed embryos. Overall, the data suggests that the combination of zinc deficiency and arsenic exposure has harmful effects on the developing embryo and may increase the risk for developing chronic diseases like diabetes.
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Affiliation(s)
- Laura M. Beaver
- Biological and Population Health Sciences, Oregon State University, Corvallis, Oregon, United States of America
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon, United States of America
| | - Lisa Truong
- Department of Environmental and Molecular Toxicology, Sinnhuber Aquatic Research Laboratory, Oregon State University, Corvallis, Oregon, United States of America
- The Environmental Health Sciences Center, Oregon State University, Corvallis, Oregon, United States of America
| | - Carrie L. Barton
- Department of Environmental and Molecular Toxicology, Sinnhuber Aquatic Research Laboratory, Oregon State University, Corvallis, Oregon, United States of America
- The Environmental Health Sciences Center, Oregon State University, Corvallis, Oregon, United States of America
| | - Tyler T. Chase
- Biological and Population Health Sciences, Oregon State University, Corvallis, Oregon, United States of America
| | - Greg D. Gonnerman
- Department of Environmental and Molecular Toxicology, Sinnhuber Aquatic Research Laboratory, Oregon State University, Corvallis, Oregon, United States of America
- The Environmental Health Sciences Center, Oregon State University, Corvallis, Oregon, United States of America
| | - Carmen P. Wong
- Biological and Population Health Sciences, Oregon State University, Corvallis, Oregon, United States of America
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon, United States of America
| | - Robert L. Tanguay
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon, United States of America
- Department of Environmental and Molecular Toxicology, Sinnhuber Aquatic Research Laboratory, Oregon State University, Corvallis, Oregon, United States of America
- The Environmental Health Sciences Center, Oregon State University, Corvallis, Oregon, United States of America
- Center for Genome Research and Biocomputing, Oregon State University, Corvallis, Oregon, United States of America
| | - Emily Ho
- Biological and Population Health Sciences, Oregon State University, Corvallis, Oregon, United States of America
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon, United States of America
- The Environmental Health Sciences Center, Oregon State University, Corvallis, Oregon, United States of America
- Center for Genome Research and Biocomputing, Oregon State University, Corvallis, Oregon, United States of America
- Moore Family Center for Whole Grain Foods, Nutrition and Preventive Health, Oregon State University, Corvallis, Oregon, United States of America
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18
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Xu H, Medina S, Lauer FT, Douillet C, Liu KJ, Stýblo M, Burchiel SW. Genotoxicity induced by monomethylarsonous acid (MMA +3) in mouse thymic developing T cells. Toxicol Lett 2017; 279:60-66. [PMID: 28760575 DOI: 10.1016/j.toxlet.2017.07.897] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 07/17/2017] [Accepted: 07/27/2017] [Indexed: 02/08/2023]
Abstract
Drinking water exposure to arsenic is known to cause immunotoxicity. Our previous studies demonstrated that monomethylarsonous acid (MMA+3) was the major arsenical species presented in mouse thymus cells after a 30 d drinking water exposure to arsenite (As+3). MMA+3 was also showed to be ten times more toxic than As+3 on the suppression of IL-7/STAT5 signaling in the double negative (DN) thymic T cells. In order to examine the genotoxicity induced by low to moderate doses of MMA+3, isolated mouse thymus cells were treated with 5, 50 and 500nMMMA+3 for 18h in vitro. MMA+3 suppressed the proliferation of thymus cells in a dose dependent manner. MMA+3 at 5nM induced DNA damage in DN not double positive (DP) cells. Differential sensitivity to double strand breaks and reactive oxygen species generation was noticed between DN and DP cells at 50nM, but the effects were not seen at the high dose (500nM). A stronger apoptotic effect induced by MMA+3 was noticed in DN cells than DP cells at low doses (5 and 50nM), which was negated by the strong apoptosis induction at the high dose (500nM). Analysis of intracellular MMA+3 concentrations in DN and DP cells, revealed that more MMA+3 accumulated in the DN cells after the in vitro treatment. Collectively, these results suggested that MMA+3 could directly induce strong genotoxicity in the early developing T cells in the thymus. The DN cells were much more sensitive to MMA+3 induced genotoxicity and apoptosis than DP cells, probably due to the higher intracellular levels of MMA+3.
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Affiliation(s)
- Huan Xu
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Sebastian Medina
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Fredine T Lauer
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27516, United States
| | - Ke Jian Liu
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27516, United States
| | - Scott W Burchiel
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States.
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Ronci L, De Matthaeis E, Chimenti C, Davolos D. Arsenic-contaminated freshwater: assessing arsenate and arsenite toxicity and low-dose genotoxicity in Gammarus elvirae (Crustacea; Amphipoda). ECOTOXICOLOGY (LONDON, ENGLAND) 2017; 26:581-588. [PMID: 28332024 DOI: 10.1007/s10646-017-1791-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/04/2017] [Indexed: 06/06/2023]
Abstract
Arsenic (As) contamination of freshwater is largely due to geogenic processes, but As is also released into the environment because of improper anthropic activities. The European regulatory limits in drinking water are of 10 μg L-1 As. However, knowledge of the genotoxic effects induced by low doses of As in freshwater environments is still scanty. This study was designed to investigate arsenate (As(V)) and arsenite (As(III)) toxicity and low-dose genotoxicity in Gammarus elvirae, which has proved to be a useful organism for genotoxicity assays in freshwater. As(V) and As(III) toxicity was assessed on the basis of the median lethal concentration, LC(50), while estimates of DNA damage were based on the Comet assay. The G. elvirae LC (50-240 h) value we calculated was 1.55 mg L-1 for As(V) and 1.72 mg L-1 for As(III). Arsenic exposure (240 h) at 5, 10, and 50 µg L-1 of As in assays with either arsenate or arsenite-induced DNA damage in hemocytes of G. elvirae in a concentration-dependent manner. Our study provides a basis for future genotoxic research on exposure to freshwater that contains low levels of arsenic.
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Affiliation(s)
- Lucilla Ronci
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Viale dell'Università 32, Rome, Italy
| | - Elvira De Matthaeis
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Viale dell'Università 32, Rome, Italy
| | - Claudio Chimenti
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Viale dell'Università 32, Rome, Italy
| | - Domenico Davolos
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Viale dell'Università 32, Rome, Italy.
- Department of Technological Innovations and Safety of Plants, Products and Anthropic Settlements, INAIL, Research Area, Via R. Ferruzzi 38/40, Rome, Italy.
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20
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Xu H, Medina S, Lauer FT, Douillet C, Liu KJ, Hudson LG, Stýblo M, Aleksunes LM, Burchiel SW. Efflux Transporters Regulate Arsenite-Induced Genotoxicity in Double Negative and Double Positive T Cells. Toxicol Sci 2017; 158:127-139. [PMID: 28472378 PMCID: PMC6257016 DOI: 10.1093/toxsci/kfx075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Arsenite (As+3) exposure is known to cause immunotoxicity in human and animal models. Our previous studies demonstrated that As+3 at 50-500 nM concentrations induced both genotoxicity and nongenotoxicity in mouse thymus cells. Developing T cells at CD4-CD8- double negative (DN) stage, the first stage after early T cells are transported from bone marrow to thymus, were found to be more sensitive to As+3 toxicity than the T cells at CD4 + CD8 + double positive (DP) stage in vitro. Induction of Mdr1 (Abcb1) and Mrp1 (Abcc1), 2 multidrug resistance transporters and exporters of As+3, was associated with the reversal of As+3-induced double strand breaks and DNA damage. In order to confirm that the thymus cell populations have different sensitivity to As+3in vivo, male C57BL/6J mice were exposed to 0, 100, and 500 ppb As+3 in drinking water for 30 d. A significant decrease in DN cell percentage was observed with exposure to 500 ppb As+3. Low to moderate concentrations of As+3 were shown to induce higher genotoxicity in sorted DN than DP cells in vitro. Calcein AM uptake and Mdr1/Mrp1 mRNA quantification results revealed that DN cells not only had limited As+3 exporter activity, but also lacked the ability to activate these exporters with As+3 treatments, resulting in a higher accumulation of intracellular As+3. Knockdown study of As+3 exporters in the DN thymic cell line, D1 using siRNA, demonstrated that Mdr1 and Mrp1 regulate intracellular As+3 accumulation and genotoxicity. Taken together, the results indicate that transporter regulation is an important mechanism for differential genotoxicity induced by As+3 in thymocytes at different developmental stages.
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Affiliation(s)
- Huan Xu
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Sebastian Medina
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Fredine T. Lauer
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516
| | - Ke Jian Liu
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Laurie G. Hudson
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27516
| | - Lauren M. Aleksunes
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854
| | - Scott W. Burchiel
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, Albuquerque, New Mexico 87131
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Ding X, Zhou X, Cooper KL, Huestis J, Hudson LG, Liu KJ. Differential sensitivities of cellular XPA and PARP-1 to arsenite inhibition and zinc rescue. Toxicol Appl Pharmacol 2017; 331:108-115. [PMID: 28552776 DOI: 10.1016/j.taap.2017.05.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 05/18/2017] [Accepted: 05/24/2017] [Indexed: 12/20/2022]
Abstract
Arsenite directly binds to the zinc finger domains of the DNA repair protein poly (ADP ribose) polymerase (PARP)-1, and inhibits PARP-1 activity in the base excision repair (BER) pathway. PARP inhibition by arsenite enhances ultraviolet radiation (UVR)-induced DNA damage in keratinocytes, and the increase in DNA damage is reduced by zinc supplementation. However, little is known about the effects of arsenite and zinc on the zinc finger nucleotide excision repair (NER) protein xeroderma pigmentosum group A (XPA). In this study, we investigated the difference in response to arsenite exposure between XPA and PARP-1, and the differential effectiveness of zinc supplementation in restoring protein DNA binding and DNA damage repair. Arsenite targeted both XPA and PARP-1 in human keratinocytes, resulting in zinc loss from each protein and a pronounced decrease in XPA and PARP-1 binding to chromatin as demonstrated by Chip-on-Western assays. Zinc effectively restored DNA binding of PARP-1 and XPA to chromatin when zinc concentrations were equal to those of arsenite. In contrast, zinc was more effective in rescuing arsenite-augmented direct UVR-induced DNA damage than oxidative DNA damage. Taken together, our findings indicate that arsenite interferes with PARP-1 and XPA binding to chromatin, and that zinc supplementation fully restores DNA binding activity to both proteins in the cellular context. Interestingly, rescue of arsenite-inhibited DNA damage repair by supplemental zinc was more sensitive for DNA damage repaired by the XPA-associated NER pathway than for the PARP-1-dependent BER pathway. This study expands our understanding of arsenite's role in DNA repair inhibition and co-carcinogenesis.
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Affiliation(s)
- Xiaofeng Ding
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of New Mexico, Albuquerque, NM 87131, United States; College of Life Science, Hunan Normal University, Changsha, Hunan 410081, China
| | - Xixi Zhou
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of New Mexico, Albuquerque, NM 87131, United States
| | - Karen L Cooper
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of New Mexico, Albuquerque, NM 87131, United States
| | - Juliana Huestis
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of New Mexico, Albuquerque, NM 87131, United States
| | - Laurie G Hudson
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of New Mexico, Albuquerque, NM 87131, United States.
| | - Ke Jian Liu
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of New Mexico, Albuquerque, NM 87131, United States
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22
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Rao CV, Pal S, Mohammed A, Farooqui M, Doescher MP, Asch AS, Yamada HY. Biological effects and epidemiological consequences of arsenic exposure, and reagents that can ameliorate arsenic damage in vivo. Oncotarget 2017; 8:57605-57621. [PMID: 28915699 PMCID: PMC5593671 DOI: 10.18632/oncotarget.17745] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 04/27/2017] [Indexed: 01/18/2023] Open
Abstract
Through contaminated diet, water, and other forms of environmental exposure, arsenic affects human health. There are many U.S. and worldwide "hot spots" where the arsenic level in public water exceeds the maximum exposure limit. The biological effects of chronic arsenic exposure include generation of reactive oxygen species (ROS), leading to oxidative stress and DNA damage, epigenetic DNA modification, induction of genomic instability, and inflammation and immunomodulation, all of which can initiate carcinogenesis. High arsenic exposure is epidemiologically associated with skin, lung, bladder, liver, kidney and pancreatic cancer, and cardiovascular, neuronal, and other diseases. This review briefly summarizes the biological effects of arsenic exposure and epidemiological cancer studies worldwide, and provides an overview for emerging rodent-based studies of reagents that can ameliorate the effects of arsenic exposure in vivo. These reagents may be translated to human populations for disease prevention. We propose the importance of developing a biomarker-based precision prevention approach for the health issues associated with arsenic exposure that affects millions of people worldwide.
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Affiliation(s)
- Chinthalapally V Rao
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hematology/Oncology Section, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
| | - Sanya Pal
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hematology/Oncology Section, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
| | - Altaf Mohammed
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hematology/Oncology Section, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
| | - Mudassir Farooqui
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hematology/Oncology Section, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
| | - Mark P Doescher
- Stephenson Cancer Center and Department of Family and Preventive Medicine, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
| | - Adam S Asch
- Stephenson Cancer Center, Department of Medicine, Hematology/Oncology Section, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
| | - Hiroshi Y Yamada
- Center for Cancer Prevention and Drug Development, Department of Medicine, Hematology/Oncology Section, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
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23
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Xu H, McClain S, Medina S, Lauer FT, Douillet C, Liu KJ, Hudson LG, Stýblo M, Burchiel SW. Differential sensitivities of bone marrow, spleen and thymus to genotoxicity induced by environmentally relevant concentrations of arsenite. Toxicol Lett 2016; 262:55-61. [PMID: 27659730 DOI: 10.1016/j.toxlet.2016.09.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/08/2016] [Accepted: 09/17/2016] [Indexed: 01/28/2023]
Abstract
It is known in humans and mouse models, that drinking water exposures to arsenite (As+3) leads to immunotoxicity. Previously, our group showed that certain types of immune cells are extremely sensitive to arsenic induced genotoxicity. In order to see if cells from different immune organs have differential sensitivities to As+3, and if the sensitivities correlate with the intracellular concentrations of arsenic species, male C57BL/6J mice were dosed with 0, 100 and 500ppb As+3via drinking water for 30d. Oxidation State Specific Hydride Generation- Cryotrapping- Inductively Coupled Plasma- Mass Spectrometry (HG- CT- ICP- MS) was applied to analyze the intracellular arsenic species and concentrations in bone marrow, spleen and thymus cells isolated from the exposed mice. A dose-dependent increase in intracellular monomethylarsonous acid (MMA+3) was observed in both bone marrow and thymus cells, but not spleen cells. The total arsenic and MMA+3 levels were correlated with an increase in DNA damage in bone marrow and thymus cells. An in vitro treatment of 5, 50 and 500nM As+3 and MMA+3 revealed that bone marrow cells are most sensitive to As+3 treatment, and MMA+3 is more genotoxic than As+3. These results suggest that the differential sensitivities of the three immune organs to As+3 exposure are due to the different intracellular arsenic species and concentrations, and that MMA+3 may play a critical role in immunotoxicity.
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Affiliation(s)
- Huan Xu
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Shea McClain
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Sebastian Medina
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Fredine T Lauer
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27516, United States
| | - Ke Jian Liu
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Laurie G Hudson
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27516, United States
| | - Scott W Burchiel
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States.
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24
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Xu H, Lauer FT, Liu KJ, Hudson LG, Burchiel SW. Editor's Highlight: Interactive Genotoxicity Induced by Environmentally Relevant Concentrations of Benzo(a)Pyrene Metabolites and Arsenite in Mouse Thymus Cells. Toxicol Sci 2016; 154:153-161. [PMID: 27503386 DOI: 10.1093/toxsci/kfw151] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Arsenic and polycyclic aromatic hydrocarbon (PAH) exposures affect many people worldwide leading to cancer and other diseases. Arsenite (As+3) and certain PAHs are known to cause genotoxicity. However, there is limited information on the interactions between As+3 and PAHs at environmentally relevant concentrations. The thymus is the primary immune organ for T cell development in mammals. Our previous studies showed that environmentally relevant concentrations of As+3 induce genotoxicity in mouse thymus cells through Poly(ADP-ribose) polymerase (PARP) inhibition. Certain PAHs, such as the metabolites of benzo(a)pyrene (BaP), are known to cause DNA damage by forming DNA adducts. In the present study, primary mouse thymus cells were examined for DNA damage following 18 hr in vitro treatments with 5 or 50 nM As+3 and 100 nM BaP, benzo[a]pyrene-7,8-dihydrodiol (BP-Diol), or benzo[a]pyrene-7,8-dihydrodiol-9,10-epoxide (BPDE). An interactive increase in genotoxicity and apoptosis were observed following treatments with 5 nM As + 3 + 100 nM BP-diol and 50 nM As + 3 + 100 nM BPDE. We attribute the increase in DNA damage to inhibition of PARP inhibition leading to decreased DNA repair. To further support this hypothesis, we found that a PARP inhibitor, 3,4-dihydro-5[4-(1-piperindinyl) butoxyl]-1(2H)-isoquinoline (DPQ), also interacted with BP-diol to produce an increase in DNA damage. Interestingly, we also found that As+3 and BP-diol increased CYP1A1 and CYP1B1 expression, suggesting that increased PAH metabolism may also contribute to genotoxicity. In summary, these results show that the suppression of PARP activity and induction of CYP1A1/CYP1B1 may act together to increase DNA damage produced by As+3 and PAHs.
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Affiliation(s)
- Huan Xu
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, New Mexico 87131
| | - Fredine T Lauer
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, New Mexico 87131
| | - Ke Jian Liu
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, New Mexico 87131
| | - Laurie G Hudson
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, New Mexico 87131
| | - Scott W Burchiel
- Department of Pharmaceutical Sciences, The University of New Mexico College of Pharmacy, New Mexico 87131
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25
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Xu H, Lauer FT, Liu KJ, Hudson LG, Burchiel SW. Environmentally relevant concentrations of arsenite and monomethylarsonous acid inhibit IL-7/STAT5 cytokine signaling pathways in mouse CD3+CD4-CD8- double negative thymus cells. Toxicol Lett 2016; 247:62-8. [PMID: 26921788 DOI: 10.1016/j.toxlet.2016.02.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 02/04/2016] [Accepted: 02/22/2016] [Indexed: 12/20/2022]
Abstract
Environmental arsenic exposure is a public health issue. Immunotoxicity induced by arsenic has been reported in humans and animal models. The purpose of this study was to evaluate mechanisms of As(+3) and MMA(+3) toxicity in mouse thymus cells. Because we know that MMA(+3) inhibits IL-7 signaling in mouse bone marrow pre-B cells, we studied the influence of As(+3) and MMA(+3) on T cell development in the thymus at the earliest stage of T cell development (CD4-CD8-, double negative, DN) which requires IL-7 dependent signaling. We found in a DN thymus cell line (D1) that a low concentration of MMA(+3) (50 nM) suppressed IL-7 dependent JAK1, 3 and STAT5 signaling. As(+3) suppressed STAT5 and JAK3 at higher concentrations (500 nM). Cell surface expression of the IL-7 receptor (CD127) was also suppressed by 50 nM MMA(+)3, but was increased by 500 NM As(+3), indicating possible differences in the mechanisms of action of these agents. A decrease in cyclin D1 protein expression was observed in D1 cells exposed to As(+3) at 500 nM and MMA(+3) starting at 50 nM, suggesting that arsenic at these environmentally-relevant doses suppresses early T cell development through the inhibition of IL-7 signaling pathway.
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Affiliation(s)
- Huan Xu
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque NM 87131, United States
| | - Fredine T Lauer
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque NM 87131, United States
| | - Ke Jian Liu
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque NM 87131, United States
| | - Laurie G Hudson
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque NM 87131, United States
| | - Scott W Burchiel
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque NM 87131, United States.
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