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#36206716   2022/09/29 To Up

Nanoplastics induce molecular toxicity in earthworm: Integrated multi-omics, morphological, and intestinal microorganism analyses.

The toxicity of nanoplastics (NPs) at relatively low concentrations to soil fauna at different organismal levels is poorly understood. We investigated the responses of earthworm (Eisenia fetida) to polystyrene NPs (90-110 nm) contaminated soil at a relatively low concentration (0.02 % w:w) based on multi-omics, morphological, and intestinal microorganism analyses. Results showed that NPs accumulated in earthworms' intestinal tissues. The NPs damaged earthworms' digestive and immune systems based on injuries of the intestinal epithelium and chloragogenous tissues (tissue level) and increased the number of changed genes in the digestive and immune systems (transcriptome level). The NPs reduced gut microorganisms' diversity (Shannon index) and species richness (Chao 1 index). Proteomic, transcriptome, and histopathological analyses showed that earthworms suffered from oxidative and inflammatory stresses. Moreover, NPs influenced the osmoregulatory metabolism of earthworms as NPs damaged intestinal epithelium (tissue level), increased aldosterone-regulated sodium reabsorption (transcriptome level), inositol phosphate metabolism (proteomic level) and 2-hexyl-5-ethyl-furan-3-sulfonic acid, and decreased betaine and myo-inositol concentrations (metabolic level). Transcriptional-metabolic and transcriptional-proteomic analyses revealed that NPs disrupted earthworm carbohydrate and arachidonic acid metabolisms. Our multi-level investigation indicates that NPs at a relatively low concentration induced toxicity to earthworms and suggests that NPs pollution has significant environmental toxicity risks for soil fauna.
Ronggui Tang, Dong Zhu, Yongming Luo, Defu He, Haibo Zhang, Ali El-Naggar, Kumuduni Niroshika Palansooriya, Keyi Chen, Yan Yan, Xinghang Lu, Minshen Ying, Tao Sun, Yuntao Cao, Zhihan Diao, Yuxin Zhang, Yichen Lian, Scott X Chang, Yanjiang Cai

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#6281909   // To Up

[Pseudohypoaldosteronism: familial forms. Eight case-reports, with a review of the literature (author's transl)].

Pseudohypoaldosteronism (PHA) is an uncommon cause of the renal salt loosing syndrome in infancy. The authors describe eight cases in two different families. Hyperaldosteronism persists long after clinical recovery has occurred. Plasma hormone assay allows retrospective recognition of cases overlooked during infancy. This underlines the variability of disease expression among different members of the same family. The high family occurrence rate (over 50%), which is often underestimated, is demonstrated by the study of both families and by a review of published cases. Clinical and biochemical features of familial PHA are discussed. Inheritance is usually on an autosomal dominant basis. However, the small number of reported cases cannot allow any attempt to individualize subgroups of the disorder upon genetic grounds.
C Roy, J Cruveiller, J P Harpey, F Renault, P Debray, B Caille

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