1
|
Kuroda K, Ishii Y, Takasu S, Kijima A, Matsushita K, Masumura KI, Nohmi T, Umemura T. Possible contribution of 8-hydroxydeoxyguanosine to gene mutations in the kidney DNA of gpt delta rats following potassium bromate treatment. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2024; 894:503729. [PMID: 38432777 DOI: 10.1016/j.mrgentox.2024.503729] [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: 12/05/2023] [Revised: 01/15/2024] [Accepted: 01/18/2024] [Indexed: 03/05/2024]
Abstract
8-Hydroxydeoxyguanosine (8-OHdG) is well known not only as an effective biomarker of oxidative stress but also as a mutagenic DNA modification. Incorporation of dAMP at the opposite site of 8-OHdG induces G>T or A>C transversions. However, in vivo analyses of gene mutations caused by potassium bromate (KBrO3), which can induce 8-OHdG at carcinogenic target sites, showed that G>T was prominent in the small intestines of mice, but not in the kidneys of rats. Because KBrO3 was a much clearer carcinogen in the kidneys of rats, detailed analyses of gene mutations in the kidney DNA of rats treated with KBrO3 could improve our understanding of oxidative stress-mediated carcinogenesis. In the current study, site-specific reporter gene mutation assays were performed in the kidneys of gpt delta rats treated with KBrO3. Groups of 5 gpt delta rats were treated with KBrO3 at concentrations of 0, 125, 250, or 500 ppm in the drinking water for 9 weeks. At necropsy, the kidneys were macroscopically divided into the cortex and medulla. 8-OHdG levels in DNA extracted from the cortex were dramatically elevated at concentrations of 250 ppm and higher compared with those from the medulla. Cortex-specific increases in mutant frequencies in gpt and red/gam genes were found at 500 ppm. Mutation spectrum and sequence analyses of their mutants demonstrated significant elevations in A>T transversions in the gpt gene and single base deletions at guanine or adenine in the gpt or red/gam genes. While A>T transversions and single base deletions of adenine may result from the oxidized modification of adenine, the contribution of 8-OHdG to gene mutations was limited despite possible participation of the 8-OHdG repair process in guanine deletion.
Collapse
Affiliation(s)
- Ken Kuroda
- Division of Pathology, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan
| | - Yuji Ishii
- Division of Pathology, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan
| | - Shinji Takasu
- Division of Pathology, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan
| | - Aki Kijima
- Division of Pathology, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan
| | - Kohei Matsushita
- Division of Pathology, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan
| | - Ken-Ichi Masumura
- Division of Genetics and Mutagenesis, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan
| | - Takehiko Nohmi
- Division of Pathology, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan
| | - Takashi Umemura
- Division of Pathology, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan; Faculty of Animal Health Technology, Yamzaki University of Animal Health Technology, 4-7-2 Minamiosawa, Hachioji-shi, Tokyo, Japan.
| |
Collapse
|
2
|
Dündar OA, Arar Ö, Arda M. Removal of bromate ions from aqueous solutions via electrodeionization. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 339:122726. [PMID: 37844860 DOI: 10.1016/j.envpol.2023.122726] [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: 04/14/2023] [Revised: 10/08/2023] [Accepted: 10/10/2023] [Indexed: 10/18/2023]
Abstract
Bromate (BrO3-) is a disinfection byproduct formed during the chemical oxidation of water containing bromide. Due to the carcinogenic effect of bromate, its maximum permissible concentration in drinking water has been set to 10 μg/L by the World Health Organization. In this study, the removal of BrO3- ions from aqueous solutions via electrodeionization (EDI) was investigated. The removal rate of BrO3- varied with the applied potential, and at 10 V, a removal rate of 99% was achieved. However, further increasing the applied potential to 30 V had a negative effect on the removal rate. Additionally, a low bromate concentration in the product water was achieved by reducing Na2SO4 conductivity in the electrode compartment. The removal of BrO3- is pH dependent, and at pH 1, only 17.5% was removed. However, increasing the pH of the solution to 5 increased the removal rate to 99.6%. Increasing the operating time and number of cells in the EDI stack improved the removal rate of BrO3-, and its concentration decreased from 5 mg/L to 1.4 μg/L. The calculated flux for BrO3- was 2.17 × 10-5 mol/m2s, specific power consumption was 89.98-W/hg KBrO3, and mass-transfer coefficient was 5.4 × 10-4 m/s at 10 V.
Collapse
Affiliation(s)
| | - Özgür Arar
- Chemistry Department of Ege University, Izmir, Turkey.
| | - Müşerref Arda
- Chemistry Department of Ege University, Izmir, Turkey.
| |
Collapse
|
3
|
Nivetha S, Asha KRT, Srinivasan S, Murali R, Kanagalakshmi A. Hepatoprotective effect of p-Coumaric acid against KBrO 3 -induced apoptosis in HepG2 cells. Cell Biochem Funct 2023; 41:868-875. [PMID: 37573567 DOI: 10.1002/cbf.3837] [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: 06/11/2023] [Revised: 07/30/2023] [Accepted: 08/02/2023] [Indexed: 08/15/2023]
Abstract
In the present study, we investigated the effect of the p-Coumaric acid (PCA), a phenolic acid, on potassium bromate (KBrO3 ) induced oxidative damage, Ras/Raf/MEK signaling, and apoptosis in HepG2 cells. Our findings showed that PCA-treated cells prevented cytotoxicity compared with KBrO3- treated cells. Furthermore, KBrO3 -induced oxidative stress and lipid peroxidation was attenuated by PCA and it also increased the antioxidant levels such as SOD, CAT, and GPX. Additionally, PCA inhibited the KBrO3 -induced DNA damage in HepG2 cells. Moreover, PCA treatment suppressed the activation of Ras/Raf/MEK signaling and increased the expression of PRDX-1. In addition, PCA prevented the KBrO3 -induced apoptosis cascade by altering the expression of proapoptotic, Bax, caspase-3, and antiapoptotic, Bcl-2 proteins. The present study proves that PCA inhibited the KBrO3 -induced oxidative stress, DNA damage, and apoptotic signaling cascade in HepG2 cells.
Collapse
Affiliation(s)
- Selvaraj Nivetha
- Department of Biochemistry and Biotechnology, Annamalai University, Annamalainagar, Tamil Nadu, India
- Department of Biochemistry, Government Arts College, Paramakudi, Tamil Nadu, India
| | | | - Subramani Srinivasan
- Department of Biochemistry and Biotechnology, Annamalai University, Annamalainagar, Tamil Nadu, India
- Department of Biochemistry, Government Arts College for Women, Krishnagiri, Tamil Nadu, India
| | - Raju Murali
- Department of Biochemistry and Biotechnology, Annamalai University, Annamalainagar, Tamil Nadu, India
- Department of Biochemistry, Government Arts College for Women, Krishnagiri, Tamil Nadu, India
| | - Ambothi Kanagalakshmi
- Department of Biochemistry and Biotechnology, Annamalai University, Annamalainagar, Tamil Nadu, India
- Department of Biochemistry, Government Arts College for Women, Krishnagiri, Tamil Nadu, India
| |
Collapse
|
4
|
Akkoyun HT, Uyar A, Bayramoglu Akkoyun M, Bengü AŞ, Melek Ş, Karagözoğlu F, Aydın S, Ekin S, Erdem SA. The protective effect of arbutin against potassium bromate-induced oxidative damage in the rat brain. J Biochem Mol Toxicol 2023; 37:e23248. [PMID: 36284482 DOI: 10.1002/jbt.23248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 09/08/2022] [Accepted: 10/12/2022] [Indexed: 11/11/2022]
Abstract
This study aimed to investigate the protective effects of arbutin (ARB) against brain injury induced in rats with potassium bromate (KBrO3 ). The rats were divided into four groups as Group 1: Control (0.9% NaCl ml/kg/day p.), Group 2: KBrO3 (100 mg/kg (gavage), Group 3: ARB (50 mg/kg/day p.), and Group 4: KBrO3 + ARB (100 mg/kg (gavage) + 50 mg/kg/day p.). At the end of the fifth day of the study, the rats in all groups were killed, and their brain tissues were collected. In the collected brain tissues, malondialdehyde (MDA), superoxide dismutase (SOD), and catalase (CAT) levels were measured, and routine histopathological examinations were made. The MDA levels in the group that was exposed to KBrO3 were significantly higher than those in the control group (p ˂ 0.001). In comparison to the KBrO3 group, the MDA levels in the KBrO3 + ARB group were significantly lower (p ˂ 0.001). It was observed that SOD and CAT enzyme activity levels were significantly lower in the KBrO3 group compared to the control group (p ˂ 0.001), while these levels were significantly higher in the KBrO3 + ARB group than in the KBrO3 group (p ˂ 0.001). Additionally, the group that was subjected to KBrO3 toxicity, as well as ARB administration, had much lower levels of histopathologic signs than the group that was subjected to KBrO3 toxicity only. Consequently, it was found that KBrO3 exposure led to injury in the brain tissues of the rats, and using ARB was effective in preventing this injury.
Collapse
Affiliation(s)
- H Turan Akkoyun
- Department of Physiology, Faculty of Veterinary Medicine, Siirt University, Siirt, Turkey
| | - Ahmet Uyar
- Department of Pathology, Faculty of Veterinary Medicine, Hatay Mustafa Kemal University, Hatay, Turkey
| | | | - Aydın Şükrü Bengü
- Department of Medical Services and Technics, Vocational School of Health, Bingöl University, Bingöl, Turkey
| | - Şule Melek
- Department of Surgery, Faculty of Veterinary Medicine, Bingöl University, Bingöl, Turkey
| | - Fatma Karagözoğlu
- Department of Zootechnique and Animal Nutrition, Faculty of Veterinary Medicine, Bingöl University, Bingöl, Turkey
| | - Sevinç Aydın
- Çemişgezek Vocational School, Munzur University, Tunceli, Turkey
| | - Suat Ekin
- Department of Chemistry, Faculty of Science, Van Yüzüncü Yıl University, Van, Turkey
| | - Sinem Aslan Erdem
- Department of Pharmacognosy, Faculty of Pharmacy, Ankara University, Ankara, Turkey
| |
Collapse
|