کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
575752 | 1453060 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impacts of BDE209 addition on Pb uptake, subcellular partitioning and gene toxicity in earthworm (Eisenia fetida)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
Lead (Pb) and decabromodiphenyl ether (BDE209) are the mainly co-existed contaminants at e-waste recycling sites. The potential toxicity of Pb (250 μg gâ1) to earthworm Eisenia fetida in the presence of BDE209 (1, 10 and 100 μg gâ1) was determined during 14-d incubation period. Compared to Pb treatment alone, the co-exposure with 1 μg gâ1 BDE209 barely affected Pb uptake, subcellular partitioning and gene expression; however, histopathological changes in earthworms' body wall (epidermal, circular and longitudinal muscles) demonstrated that 10 and 100 μg gâ1 BDE209 additions enhanced Pb uptake and altered its subcellular partitioning, indicating that Pb redistributed from fractions E (cell debris) and D (metal-rich granules) to fraction C (cytosols); Additionally, BDE209 supply significantly inhibited (p < 0.05) the induction of SOD (superoxide dismutase) and CAT (catalase) gene expressions (maximum down-regulation 59% for SOD gene at Pb + 100 μg gâ1 BDE209 and 89% for CAT gene at Pb + 10 μg gâ1 BDE209), while facilitated (p < 0.05) Hsp90 (heat shock protein 90) gene expression with maximum induction rate of 120% after exposure to Pb + 10 μg gâ1 BDE209. These findings illustrate the importance of considering environmental BDE209 co-exposure when assessing Pb bioaccumulation and toxicity in multi-contaminated soil ecosystems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 300, 30 December 2015, Pages 737-744
Journal: Journal of Hazardous Materials - Volume 300, 30 December 2015, Pages 737-744
نویسندگان
Wei Zhang, Kou Liu, Jing Li, Jun Liang, Kuangfei Lin,