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Haque MA, Yoshimoto A, Nakagawa H, Nishimura K. Effect of long-term inorganic arsenic exposure on erythropoietin production in vitro. Toxicol In Vitro 2024; 99:105877. [PMID: 38876227 DOI: 10.1016/j.tiv.2024.105877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 05/28/2024] [Accepted: 06/10/2024] [Indexed: 06/16/2024]
Abstract
Arsenic is widely present in the environment in trivalent and pentavalent forms; long-term arsenic exposure due to environmental pollution has become a problem. Previous reports have shown that 24-h exposure to arsenate (as pentavalent arsenic) potentiates erythropoietin (EPO) production via reactive oxygen species (ROS) in EPO-producing HepG2 cells. However, the effects of long-term arsenate exposure on EPO production remain unclear. In HepG2 cells subcultured for 3 weeks in the presence of arsenate, EPO mRNA levels were lower than those in untreated cells. Levels of ARSENITE METHYLTRANSFERASE mRNA, as well as those of Nuclear factor erythroid 2-related factor 2, glutathione, and superoxide dismutase proteins, were increased compared to untreated cells, but levels of malondialdehyde were not significantly altered. Thus, long-term exposure to arsenate enhances ROS scavenging, suggesting that the ROS-induced accumulation of EPO mRNA is attenuated by arsenate exposure. The induction of EPO accumulation by hypoxia also was attenuated by long-term arsenate exposure, suggesting an impairment in responsivity of EPO production. Furthermore, mRNA levels of SIRTUIN-1, which affects EPO transcription, were potentiated by long-term arsenate exposure. These results suggest that long-term arsenate exposure has multiple, distinct effects on EPO production in vitro.
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Affiliation(s)
- Md Anamul Haque
- Laboratory of Toxicology, Graduate School of Life and Environmental Sciences, Faculty of Veterinary Medicine, Osaka Metropolitan University, 1-58 Rinku Ohrai-Kita, Izumisano, Osaka 598-853, Japan
| | - Akari Yoshimoto
- Laboratory of Toxicology, Graduate School of Life and Environmental Sciences, Faculty of Veterinary Medicine, Osaka Metropolitan University, 1-58 Rinku Ohrai-Kita, Izumisano, Osaka 598-853, Japan
| | - Hiroshi Nakagawa
- Laboratory of Toxicology, Graduate School of Life and Environmental Sciences, Faculty of Veterinary Medicine, Osaka Metropolitan University, 1-58 Rinku Ohrai-Kita, Izumisano, Osaka 598-853, Japan
| | - Kazuhiko Nishimura
- Laboratory of Toxicology, Graduate School of Life and Environmental Sciences, Faculty of Veterinary Medicine, Osaka Metropolitan University, 1-58 Rinku Ohrai-Kita, Izumisano, Osaka 598-853, Japan.
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Nishimura K, Kiriyama N, Ogawa K, Inoue R, Haque MA, Nakagawa H. Effect of pentavalent inorganic arsenic salt on erythropoietin production and autophagy induction. Arch Biochem Biophys 2023; 734:109487. [PMID: 36513130 DOI: 10.1016/j.abb.2022.109487] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 11/21/2022] [Accepted: 12/09/2022] [Indexed: 12/14/2022]
Abstract
Arsenic is abundant in the environment and takes the form of trivalent and pentavalent arsenic compounds. Arsenite has been reported to both promote and suppress erythropoietin (EPO) production and autophagy induction. EPO production is involved in hematopoiesis, and autophagy induction is involved in cytoprotection, both of which are thought to be cellular responses to arsenic stress. While there are reports that show the effects of EPO on autophagy induction, the relationship between EPO production and autophagy induction is unclear. Therefore, this study analyzed the effect of the pentavalent inorganic arsenic salt arsenate on EPO production in vitro and in vivo and EPO-induced autophagy in HepG2 cells. Exposure of HepG2 cells to low-concentration arsenate was observed to increase EPO production and induced autophagy. Moreover, a ROS scavenger suppressed the arsenate-induced increase in autophagy and EPO mRNA levels. Both EPO production and autophagy induction contributed to protection from arsenate-induced cytotoxic stress. HepG2 cells expressed the EPO receptor and production of EPO by HepG2 cells acted in an autoregulatory manner to suppress autophagy induction. In vivo administration of low-concentration arsenate to rats increased EPO mRNA levels in the liver and kidney. These results suggested that low-concentration arsenate promotes EPO production and autophagy induction in HepG2 cells, and the resultant EPO production contributes to cytoprotection of cultured cells via EPO receptor activation.
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Affiliation(s)
- Kazuhiko Nishimura
- Laboratory of Bioenvironmental Sciences, Course of Veterinary Science, Graduate School of Veterinary Science, Osaka Metropolitan University, 1-58 Rinku Ohrai-Kita, Izumisano, Osaka, 598-8531, Japan.
| | - Naotake Kiriyama
- Laboratory of Bioenvironmental Sciences, Course of Veterinary Science, Graduate School of Veterinary Science, Osaka Metropolitan University, 1-58 Rinku Ohrai-Kita, Izumisano, Osaka, 598-8531, Japan
| | - Kazuya Ogawa
- Laboratory of Bioenvironmental Sciences, Course of Veterinary Science, Graduate School of Veterinary Science, Osaka Metropolitan University, 1-58 Rinku Ohrai-Kita, Izumisano, Osaka, 598-8531, Japan
| | - Reo Inoue
- Laboratory of Bioenvironmental Sciences, Course of Veterinary Science, Graduate School of Veterinary Science, Osaka Metropolitan University, 1-58 Rinku Ohrai-Kita, Izumisano, Osaka, 598-8531, Japan
| | - Md Anamul Haque
- Laboratory of Bioenvironmental Sciences, Course of Veterinary Science, Graduate School of Veterinary Science, Osaka Metropolitan University, 1-58 Rinku Ohrai-Kita, Izumisano, Osaka, 598-8531, Japan
| | - Hiroshi Nakagawa
- Laboratory of Bioenvironmental Sciences, Course of Veterinary Science, Graduate School of Veterinary Science, Osaka Metropolitan University, 1-58 Rinku Ohrai-Kita, Izumisano, Osaka, 598-8531, Japan
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Sánchez-Virosta P, Espín S, Ruiz S, Salminen JP, García-Fernández AJ, Eeva T. Experimental manipulation of dietary arsenic levels in great tit nestlings: Accumulation pattern and effects on growth, survival and plasma biochemistry. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 233:764-773. [PMID: 29127934 DOI: 10.1016/j.envpol.2017.10.113] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 10/25/2017] [Accepted: 10/28/2017] [Indexed: 05/24/2023]
Abstract
Arsenic (As) is a ubiquitous metalloid classified as one of the most hazardous substances, but information about its exposure and effects in free-living passerines is lacking. The aim of this study is to elucidate the effect of an As manipulation experiment on survival, growth and physiology of great tits (Parus major). Wild P. major nestlings inhabiting an unpolluted area were dosed with water, 0.2 or 1 μg g-1 d-1 of sodium arsenite (Control, Low and High As groups), whereas those living in a metal-polluted area were dosed with water (Smelter group). Birds accumulated As in tissues (liver, bone and feathers) in a dose-dependent way. Nestlings exposed to 1 μg g-1 d-1 of sodium arsenite showed reduced number of fledglings per successful nest, and those exposed to 0.2 μg g-1 d-1 had reduced wing growth, which could have post-fledging consequences such as increased predation risk. These results suggest that the LOAEL for effects on nestling survival and development in great tits is likely equal to or below 1 μg g-1 d-1. However, limited effects on the biochemical parameters evaluated were found. It has been shown that As may produce oxidative stress and tissue damage, so further research exploring this issue will be carried out in a future study.
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Affiliation(s)
- Pablo Sánchez-Virosta
- Department of Biology, University of Turku, Turku FI-20014, Finland; Area of Toxicology, Department of Socio-Sanitary Sciences, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain.
| | - Silvia Espín
- Department of Biology, University of Turku, Turku FI-20014, Finland; Area of Toxicology, Department of Socio-Sanitary Sciences, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain.
| | - Sandra Ruiz
- Department of Biology, University of Turku, Turku FI-20014, Finland.
| | - Juha-Pekka Salminen
- Laboratory of Organic Chemistry and Chemical Biology, Department of Chemistry, University of Turku, Turku FI-20014, Finland.
| | - Antonio J García-Fernández
- Area of Toxicology, Department of Socio-Sanitary Sciences, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain.
| | - Tapio Eeva
- Department of Biology, University of Turku, Turku FI-20014, Finland.
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