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Barrera-Chimal J, Henley N, Grant MP, Cenatus S, Geraldes P, Pichette V, Gerarduzzi C. Tungsten toxicity on kidney tubular epithelial cells induces renal inflammation and M1-macrophage polarization. Cell Biol Toxicol 2023; 39:3061-3075. [PMID: 37368165 DOI: 10.1007/s10565-023-09817-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 06/06/2023] [Indexed: 06/28/2023]
Abstract
Tungsten is widely used in medical, industrial, and military applications. The environmental exposure to tungsten has increased over the past several years, and few studies have addressed its potential toxicity. In this study, we evaluated the effects of chronic oral tungsten exposure (100 ppm) on renal inflammation in male mice. We found that 30- or 90-day tungsten exposure led to the accumulation of LAMP1-positive lysosomes in renal tubular epithelial cells. In addition, the kidneys of mice exposed to tungsten showed interstitial infiltration of leukocytes, myeloid cells, and macrophages together with increased levels of proinflammatory cytokines and p50/p65-NFkB subunits. In proximal tubule epithelial cells (HK-2) in vitro, tungsten induced a similar inflammatory status characterized by increased mRNA levels of CSF1, IL34, CXCL2, and CXCL10 and NFkB activation. Moreover, tungsten exposure reduced HK-2 cell viability and enhanced reactive oxygen species generation. Conditioned media from HK-2 cells treated with tungsten induced an M1-proinflammatory polarization of RAW macrophages as evidenced by increased levels of iNOS and interleukin-6 and decreased levels of the M2-antiinflammatory marker CD206. These effects were not observed when RAW cells were exposed to conditioned media from HK-2 cells treated with tungsten and supplemented with the antioxidant N-acetylcysteine (NAC). Similarly, direct tungsten exposure induced M1-proinflammatory polarization of RAW cells that was prevented by NAC co-treatment. Altogether, our data suggest that prolonged tungsten exposure leads to oxidative injury in the kidney ultimately leading to chronic renal inflammation characterized by a proinflammatory status in kidney tubular epithelial cells and immune cell infiltration.
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Affiliation(s)
- Jonatan Barrera-Chimal
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Faculté de Médecine, Centre affilié à l'Université de Montréal, Montreal, Quebec, Canada
| | - Nathalie Henley
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Faculté de Médecine, Centre affilié à l'Université de Montréal, Montreal, Quebec, Canada
| | - Michael Philip Grant
- Department of Orthopaedics, Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada
- Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Schrodinger Cenatus
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Faculté de Médecine, Centre affilié à l'Université de Montréal, Montreal, Quebec, Canada
| | - Pedro Geraldes
- Research Center, Centre Hospitalier, Université de Sherbrooke, Quebec, Canada
| | - Vincent Pichette
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Faculté de Médecine, Centre affilié à l'Université de Montréal, Montreal, Quebec, Canada
- Département de Médecine, Faculté de Médecine, Université de Montréal, Montreal, Quebec, Canada
| | - Casimiro Gerarduzzi
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Faculté de Médecine, Centre affilié à l'Université de Montréal, Montreal, Quebec, Canada.
- Département de Médecine, Faculté de Médecine, Université de Montréal, Montreal, Quebec, Canada.
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