文献类型： 外文期刊
作者： Chen, Xiubao 1 ; Song, Chao 1 ; Jiang, Jiazhen 3 ; Jiang, Tao 1 ; Xue, Junren 1 ; Bah, Ibrahim 2 ; Gu, Mengying 2 ; Wang, Meiyi 5 ; Meng, Shunlong 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Wuxi 214081, Peoples R China
2.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Peoples R China
3.China Agr Univ, Coll Sci, Beijing 100193, Peoples R China
4.Minist Fisheries & Marine Resources, Freetown 190, Sierra Leone
5.Dalian Ocean Univ, Coll Marine Sci & Technol & Environm, Dalian 116023, Peoples R China
关键词： cadmium; stable isotope dual-tracer technique; Anodonta woodiana; bioaccumulation; transcriptome; molecular regulatory
期刊名称：TOXICS （ 影响因子：4.1； 五年影响因子：4.6 ）
ISSN：
年卷期： 2025 年 13 卷 8 期
页码：
收录情况： SCI
摘要： Cadmium (Cd) pollution poses a serious threat to freshwater ecosystems. The freshwater mussel Anodonta woodiana is increasingly used as a bioindicator for monitoring Cd pollution in aquatic environments. However, the primary routes of Cd accumulation in A. woodiana remain unclear, and the molecular regulatory mechanisms underlying Cd accumulation are poorly understood. To address these gaps, this study employed a novel stable isotope dual-tracer technique to trace Cd from water (waterborne Cd-112) and the green alga Chlorella vulgaris (dietary Cd-113) during the simultaneous exposure experiment. Comparative transcriptomic analysis was then conducted to characterize molecular responses in A. woodiana following Cd exposure. The results showed that although newly accumulated Cd-112 and Cd-113 increased with exposure concentration and duration, the relative importance of Cd-112 (91.6 +/- 2.8%) was significantly higher than that of Cd-113 (8.4 +/- 2.8%) (p < 0.05). Cd exposure induced differentially expressed genes primarily enriched in the metabolic processes, cellular processes, and/or the ubiquitin-mediated proteolysis pathway. Within the ubiquitin-mediated proteolysis pathway, TRIP12 (E3 ubiquitin-protein ligase TRIP12) and Cul5 (cullin-5) were significantly upregulated. The findings will provide critical insights for interpreting Cd biomonitoring data in freshwater environments using mussels as bioindicators.
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