1
|
Han G, Tan Z, Jing H, Ning J, Li Z, Gao S, Li G. Comet Assay Evaluation of Lanthanum Nitrate DNA Damage in C57-ras Transgenic Mice. Biol Trace Elem Res 2021; 199:3728-3736. [PMID: 33403576 DOI: 10.1007/s12011-020-02500-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 11/17/2020] [Indexed: 12/24/2022]
Abstract
Due to the wide application of rare-earth elements (REEs) in the last decades, lanthanum has increasingly entered the environment and has gradually accumulated in the human body through the food chain. Lanthanum is worth paying attention in terms of food safety. Although the genotoxicity of lanthanum has been studied in vitro, data on its DNA damage in vivo rodent are limited, moreover, which have also presented some controversy. This study aimed to conduct an in vivo rodent alkaline comet assay, and as a companion test to the lanthanum nitrate carcinogenicity test. We conducted an oral gavage experiment for 180 days (26 weeks) to test for the persistence of DNA damage of long-term low-dose accumulation of lanthanum nitrate (12.5, 25, and 50 mg/kg body weight), in F1 hybrid C57-ras transgenic mice (CB6F1) by using alkaline comet assay in the blood and liver. The comet assay revealed that all the tested concentrations of lanthanum nitrate did not induce DNA damage in any of the tissues investigated, whereas DNA damage was induced in the positive control group. These results could indicate that lanthanum nitrate can accumulate in tissues and organs of the mice after exposure, and does not possess DNA damage in C57-ras transgenic mice after repeated treatments at oral doses up to 50 mg/kg·BW for 26 weeks; also, it did not cause pathological changes in the liver of the mice.
Collapse
Affiliation(s)
- Gaochao Han
- Institute of Toxicology, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine/Beijing Key Laboratory of Diagnostic and Traceablity Technologies for Food Poisoning, No. 16, Hepingli Middle Street, Dongcheng District, Beijing, 100013, China
- School of Public Health, Capital Medical University, No. 10, West Toutiao, Youanmenwai, Fengtai District, Beijing, 100069, China
| | - Zhuangsheng Tan
- Institute of Toxicology, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine/Beijing Key Laboratory of Diagnostic and Traceablity Technologies for Food Poisoning, No. 16, Hepingli Middle Street, Dongcheng District, Beijing, 100013, China
| | - Haiming Jing
- Institute of Toxicology, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine/Beijing Key Laboratory of Diagnostic and Traceablity Technologies for Food Poisoning, No. 16, Hepingli Middle Street, Dongcheng District, Beijing, 100013, China
- School of Public Health, Capital Medical University, No. 10, West Toutiao, Youanmenwai, Fengtai District, Beijing, 100069, China
| | - Junyu Ning
- Institute of Toxicology, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine/Beijing Key Laboratory of Diagnostic and Traceablity Technologies for Food Poisoning, No. 16, Hepingli Middle Street, Dongcheng District, Beijing, 100013, China
- School of Public Health, Capital Medical University, No. 10, West Toutiao, Youanmenwai, Fengtai District, Beijing, 100069, China
| | - Zinan Li
- Institute of Toxicology, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine/Beijing Key Laboratory of Diagnostic and Traceablity Technologies for Food Poisoning, No. 16, Hepingli Middle Street, Dongcheng District, Beijing, 100013, China
- School of Public Health, Capital Medical University, No. 10, West Toutiao, Youanmenwai, Fengtai District, Beijing, 100069, China
| | - Shan Gao
- Institute of Toxicology, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine/Beijing Key Laboratory of Diagnostic and Traceablity Technologies for Food Poisoning, No. 16, Hepingli Middle Street, Dongcheng District, Beijing, 100013, China
| | - Guojun Li
- Institute of Toxicology, Beijing Center for Disease Prevention and Control/Beijing Research Center for Preventive Medicine/Beijing Key Laboratory of Diagnostic and Traceablity Technologies for Food Poisoning, No. 16, Hepingli Middle Street, Dongcheng District, Beijing, 100013, China.
- School of Public Health, Capital Medical University, No. 10, West Toutiao, Youanmenwai, Fengtai District, Beijing, 100069, China.
| |
Collapse
|
2
|
Suguro M, Numano T, Kawabe M, Doi Y, Imai N, Mera Y, Tamano S. Lung Tumor Induction by 26-week Dermal Application of 1,2-Dichloroethane in CB6F1-Tg rasH2 Mice. Toxicol Pathol 2017; 45:427-434. [DOI: 10.1177/0192623317701003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Short-term alternatives to traditional 2-year carcinogenic studies in rodents are being actively pursued. Recently, a 26-week short-term carcinogenicity study using CB6F1-Tg rasH2@Jcl (rasH2) mice has become a worldwide standard for the evaluation of chemical carcinogenesis. However, an acceptable short-term carcinogenic study model for dermally applied products is still lacking. To investigate the suitability of using the rasH2 mouse to test carcinogenic potential, 1,2-dichloroethane (1,2-DCE) was dermally applied to rasH2 mice: 1,2-DCE is a known carcinogen that causes lung bronchiolo-alveolar adenomas and adenocarcinomas when administered topically, orally, or by inhalation exposure; 1,2-DCE at a dose level of 126 mg/mouse in 200 μl acetone or acetone alone (vehicle control) was applied to the dorsal skin of 10 mice of each sex 3 times a week for 26 weeks. As a positive control, 10 mice of each sex received a single intraperitoneal injection of 75 mg/kg of N-methyl- N-nitrosourea. Bronchiolo-alveolar adenomas and adenocarcinomas were significantly increased in 1,2-DCE-treated rasH2 mice of both sexes, and bronchiolo-alveolar hyperplasias were significantly increased in female mice. Overall, almost all mice of each sex developed adenomas and/or adenocarcinomas with 100% of female rasH2 mice developing bronchiolo-alveolar adenocarcinomas.
Collapse
Affiliation(s)
- Mayuko Suguro
- DIMS Institute of Medical Science, Inc., Ichinomiya, Aichi, Japan
| | - Takamasa Numano
- DIMS Institute of Medical Science, Inc., Ichinomiya, Aichi, Japan
| | - Mayumi Kawabe
- DIMS Institute of Medical Science, Inc., Ichinomiya, Aichi, Japan
| | - Yuko Doi
- DIMS Institute of Medical Science, Inc., Ichinomiya, Aichi, Japan
| | - Norio Imai
- DIMS Institute of Medical Science, Inc., Ichinomiya, Aichi, Japan
| | - Yukinori Mera
- DIMS Institute of Medical Science, Inc., Ichinomiya, Aichi, Japan
| | - Seiko Tamano
- DIMS Institute of Medical Science, Inc., Ichinomiya, Aichi, Japan
| |
Collapse
|