Abstract:
:The present study investigates the nephrotoxic effects of two acute doses of silver nanoparticles (AgNPs) and silver nitrate (AgNO3) on the African catfish, Clarias gariepinus, using biochemical, histochemical, and histopathological changes as biomarkers. AgNP-induced impacts were recorded in some of these characteristics on the bases of their size (20 and 40 nm) and concentration (10 and 100 μg/L) but no significant interaction between size and concentration. AgNO3 had low significant adverse effects on some parameters in comparison with those impacts of AgNPs. The concentrations of creatinine and uric acid exhibited different significant variations under stress in all exposed groups compared with those in the control group. On the tissue and cell levels, histopathological changes were observed. These changes include hypertrophies of glomeruli, proliferation in the haemopoietic tissue, dissociation in renal tubules, shrinkage of glomerulus, hydropic degeneration, dilatation of renal tubules, aggregation of melanomacrophages, rupture of Bowman's capsule, and the glomerular tuft and dilatation of Bowman's space. In more severe cases, the degenerative process leads to tissue necrosis in the kidney of AgNP-exposed fish as well as carbohydrate depletion; a faint coloration was also observed in the brush borders and basement membrane with a large amount of connective tissue fibers around the blood vessels and the renal tubules. Recovery period for 15 days led to improvement of most of the alterations in biochemical, histopathological, and histochemical parameters induced by AgNPs and AgNO3. In conclusion, one can postulate on the sensitivity of the kidney of C. gariepinus to AgNPs and recovery strategy is a must.
journal_name
Fish Physiol Biochemjournal_title
Fish physiology and biochemistryauthors
Mahmoud UM,Mekkawy IAA,Naguib M,Sayed AEHdoi
10.1007/s10695-019-00686-7subject
Has Abstractpub_date
2019-12-01 00:00:00pages
1895-1905issue
6eissn
0920-1742issn
1573-5168pii
10.1007/s10695-019-00686-7journal_volume
45pub_type
杂志文章abstract::High carbonate alkalinity is one of the major stress factors for living organisms in saline-alkaline water areas. Acute and chronic effects of carbonate alkalinity on expression of two genes, carbonic anhydrase 2-like (CA2-like) and Na(+)-K(+)-ATPase α subunit (NKA-α) mRNA in medaka (Oryzias latipes) were evaluated to...
journal_title:Fish physiology and biochemistry
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journal_title:Fish physiology and biochemistry
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abstract::Due to the wide use of glyphosate (GLY) in soybean cultivation, their residues in the environment may affect non-target organisms such as fish, developing toxic effects. Despite GLY being widely used in Brazil, there are few studies comparing the effects of commercial formulations in native freshwater fish species. Si...
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journal_title:Fish physiology and biochemistry
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abstract::Three pepsinogens (PG1, PG2, and PG3) were highly purified from the stomach of freshwater fish rice field eel (Monopterus albus Zuiew) by ammonium sulfate fractionation and chromatographies on DEAE-Sephacel, Sephacryl S-200 HR. The molecular masses of the three purified PGs were all estimated as 36 kDa using SDS-PAGE....
journal_title:Fish physiology and biochemistry
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doi:10.1007/s10695-010-9456-x
更新日期:2011-09-01 00:00:00
abstract::Spotted wolffish Anarhichas minor reproduction in captivity is dependent on in vitro fertilization. However, it is often challenging to acquire sufficient fresh sperm to fertilize the eggs that are obtained. In this study, we evaluate the possibility to store spotted wolffish sperm by refrigeration. Spotted wolffish s...
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abstract::Enzymatic changes that occur in the white somatic muscle of rainbow trout (Oncorhynchus mykiss) in response to spawning were investigated, and the evenness of their distribution across the ventral-dorsal plane of this muscle was assessed. Four enzymes that are involved in energy metabolism were measured (phosphofructo...
journal_title:Fish physiology and biochemistry
pub_type: 杂志文章
doi:10.1007/BF00004344
更新日期:1995-12-01 00:00:00
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journal_title:Fish physiology and biochemistry
pub_type: 杂志文章
doi:10.1007/BF00004304
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journal_title:Fish physiology and biochemistry
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doi:10.1007/s10695-015-0143-9
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pub_type: 杂志文章
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journal_title:Fish physiology and biochemistry
pub_type: 杂志文章
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pub_type: 杂志文章
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