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Chaudhury D, Sen U, Biswas S, Shenoy P S, Bose B. Assessment of Threshold Dose of Thoron Inhalation and Its Biological Effects by Mimicking the Radiation Doses in Monazite Placer Deposits Corresponding to the Normal, Medium and Very High Natural Background Radiation Areas. Biol Trace Elem Res 2023; 201:2927-2941. [PMID: 36048359 DOI: 10.1007/s12011-022-03398-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 08/14/2022] [Indexed: 11/02/2022]
Abstract
The dose contributed from thoron (220Rn) and its progeny has been neglected in the dose assessment because of its short half-life (t1/2 = 55.6 s) and generally low concentrations. Recently, concentrations of 220Rn gas and its progeny were found to be pronounced in the traditional residential dwellings in China, on beaches of India and in other countries. Accordingly, we investigated the biological effects of thoron (220Rn) decay products in various mouse organs, succeeding inhalation of thoron gas in BALB/c mouse. We investigated the biological effects upon thoron inhalation on mouse organs with a focus on oxidative stress. These mice were divided into (4 random groups): sham inhalation, thoron inhalation for 1, 4 and 10 days. Various tissues (lung, liver and kidney) were then collected after the time points and subjected to various biochemical analyses. Immediately after inhalation, mouse tissues were excised for gamma spectrometry and 72 h post inhalation for biochemical assays. The gamma spectrometry counts and its subsequent calculation of the equivalent dose showed varied distribution in the lung, liver and kidney. Our results suggest that acute thoron inhalation showed a differential effect on the antioxidant function and exerted pathophysiological alterations via oxidative stress in organs at a higher dose. These findings suggested that thoron inhalation could alter the redox state in organs; however, its characteristics were dependent on the total redox system of the organs as well as the thoron concentration and inhalation time.
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Affiliation(s)
- Debajit Chaudhury
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya (Deemed to be University), University Road, Derlakatte, Mangalore, Karnataka, 575018, India
| | - Utsav Sen
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya (Deemed to be University), University Road, Derlakatte, Mangalore, Karnataka, 575018, India
| | - Siddhartha Biswas
- Department of Onco-Pathology, Yenepoya Medical College, Yenepoya (Deemed to be University), University Road, Derlakatte, Mangalore, Karnataka, 575018, India
| | - Sudheer Shenoy P
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya (Deemed to be University), University Road, Derlakatte, Mangalore, Karnataka, 575018, India.
| | - Bipasha Bose
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya (Deemed to be University), University Road, Derlakatte, Mangalore, Karnataka, 575018, India.
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Chaudhury D, Sen U, Sahoo BK, Bhat NN, Kumara K S, Karunakara N, Biswas S, Shenoy P S, Bose B. Thorium promotes lung, liver and kidney damage in BALB/c mouse via alterations in antioxidant systems. Chem Biol Interact 2022; 363:109977. [DOI: 10.1016/j.cbi.2022.109977] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/20/2022] [Accepted: 05/04/2022] [Indexed: 01/15/2023]
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