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Shao J, Lai C, Zheng Q, Luo Y, Li C, Zhang B, Sun Y, Liu S, Shi Y, Li J, Zhao Z, Guo L. Effects of dietary arsenic exposure on liver metabolism in mice. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 274:116147. [PMID: 38460405 DOI: 10.1016/j.ecoenv.2024.116147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 02/20/2024] [Accepted: 02/22/2024] [Indexed: 03/11/2024]
Abstract
Arsenic, a ubiquitous environmental toxicant with various forms and complex food matrix interactions, can reportedly exert differential effects on the liver compared to drinking water exposure. To examine its specific liver-related harms, we targeted the liver in C57BL/6 J mice (n=48, 8-week-old) fed with arsenic-contaminated food (30 mg/kg) for 60 days, mimicking the rice arsenic composition observed in real-world scenarios (iAsV: 7.3%, iAsIII: 72.7%, MMA: 1.0%, DMA: 19.0%). We then comprehensively evaluated liver histopathology, metabolic changes, and the potential role of the gut-liver axis using human hepatocellular carcinoma cells (HepG2) and microbiota/metabolite analyses. Rice arsenic exposure significantly altered hepatic lipid (fatty acids, glycerol lipids, phospholipids, sphingolipids) and metabolite (glutathione, thioneine, spermidine, inosine, indole-derivatives, etc.) profiles, disrupting 33 metabolic pathways (bile secretion, unsaturated fatty acid biosynthesis, glutathione metabolism, ferroptosis, etc.). Pathological examination revealed liver cell necrosis/apoptosis, further confirmed by ferroptosis induction in HepG2 cells. Gut microbiome analysis showed enrichment of pathogenic bacteria linked to liver diseases and depletion of beneficial strains. Fecal primary and secondary bile acids, short-chain fatty acids, and branched-chain amino acids were also elevated. Importantly, mediation analysis revealed significant correlations between gut microbiota, fecal metabolites, and liver metabolic alterations, suggesting fecal metabolites may mediate the impact of gut microbiota and liver metabolic disorders. Gut microbiota and its metabolites may play significant roles in arsenic-induced gut-liver injuries. Overall, our findings demonstrate that rice arsenic exposure triggers oxidative stress, disrupts liver metabolism, and induces ferroptosis.
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Affiliation(s)
- Junli Shao
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Chengze Lai
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Qiuyi Zheng
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Yu Luo
- Guangzhou Liwan District Center for Disease Control and Prevention, Guangzhou, Guangdong 510176, China
| | - Chengji Li
- Yunfu Disease Control and Prevention Center, Guangdong Province 527300, China
| | - Bin Zhang
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Yanqin Sun
- Department of Pathology, School of Basic Medical Sciences, Guangdong Medical University, Dongguan 523808, China
| | - Shizhen Liu
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Yingying Shi
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Jinglin Li
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Zuguo Zhao
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China.
| | - Lianxian Guo
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China.
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Zhong X, Zhang G, Huang J, Chen L, Shi Y, Wang D, Zheng Q, Su H, Li X, Wang C, Zhang J, Guo L. Effects of Intestinal Microbiota on the Biological Transformation of Arsenic in Zebrafish: Contribution and Mechanism. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:2247-2259. [PMID: 38179619 DOI: 10.1021/acs.est.3c08010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Both the gut microbiome and their host participate in arsenic (As) biotransformation, while their exact roles and mechanisms in vivo remain unclear and unquantified. In this study, as3mt-/- zebrafish were treated with tetracycline (TET, 100 mg/L) and arsenite (iAsIII) exposure for 30 days and treated with probiotic Lactobacillus rhamnosus GG (LGG, 1 × 108 cfu/g) and iAsIII exposure for 15 days, respectively. Structural equation modeling analysis revealed that the contribution rates of the intestinal microbiome to the total arsenic (tAs) and inorganic As (iAs) metabolism approached 44.0 and 18.4%, respectively. Compared with wild-type, in as3mt-/- zebrafish, microbial richness and structure were more significantly correlated with tAs and iAs, and more differential microbes and microbial metabolic pathways significantly correlated with arsenic metabolites (P < 0.05). LGG supplement influenced the microbial communities, significantly up-regulated the expressions of genes related to As biotransformation (gss and gst) in the liver, down-regulated the expressions of oxidative stress genes (sod1, sod2, and cat) in the intestine, and increased arsenobetaine concentration (P < 0.05). Therefore, gut microbiome promotes As transformation and relieves As accumulation, playing more active roles under iAs stress when the host lacks key arsenic detoxification enzymes. LGG can promote As biotransformation and relieve oxidative stress under As exposure.
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Affiliation(s)
- Xiaoting Zhong
- Affiliated Hospital of Guangdong Medical University & Zhanjiang Key Laboratory of Zebrafish Model for Development and Disease, Guangdong Medical University, Zhanjiang 524001, China
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
- Zhanjiang Institute of Clinical Medicine, Central People's Hospital of Zhanjiang, Guangdong Medical University Zhanjiang Central Hospital, Zhanjiang 524045, PR China
| | - Guiwei Zhang
- Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518000, China
| | - Jieliang Huang
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Linkang Chen
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Yingying Shi
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Dongbin Wang
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Qiuyi Zheng
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Hongtian Su
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Xiang Li
- Affiliated Hospital of Guangdong Medical University & Zhanjiang Key Laboratory of Zebrafish Model for Development and Disease, Guangdong Medical University, Zhanjiang 524001, China
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Chunchun Wang
- Affiliated Hospital of Guangdong Medical University & Zhanjiang Key Laboratory of Zebrafish Model for Development and Disease, Guangdong Medical University, Zhanjiang 524001, China
| | - Jingjing Zhang
- Affiliated Hospital of Guangdong Medical University & Zhanjiang Key Laboratory of Zebrafish Model for Development and Disease, Guangdong Medical University, Zhanjiang 524001, China
| | - Lianxian Guo
- Dongguan Key Laboratory of Public Health Laboratory Science, The First Dongguan Affiliated Hospital, School of Public Health, Guangdong Medical University, Dongguan 523808, China
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