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Imen Rabeh Khaoula Telahigue Safa Bejaoui Tarek Hajji Lassaad Chouba M’hamed EL Cafsi 《Chemistry and Ecology》2019,35(3):204-218
Mercury (Hg) is a ubiquitous and a major environmental metal pollutant in the aquatic ecosystem. The present study was performed to evaluate the effect of mercury graded doses exposure on oxidative stress, redox status, metallothionein levels and genotoxicity in the intestine of sea cucumber Holothuria forskali. Specimens were exposed for 96?h to three concentrations of Hg (40, 80 and 160?µg/L). Exposure of H. forskali to Hg promoted oxidative stress with an increase in malondialdehyde (MDA), protein carbonyl (PCO) and advanced oxidation protein products (AOPP) levels. An increase of glutathione (GSH), vitamin C (ViteC) and non-protein thiols (NPSH) contents was also observed. Additionally, antioxidant activities of catalase (CAT), superoxide dismutase (SOD) and glutathione peroxidase (GPx) increased especially with the highest doses of Hg indicating a great defense of the antioxidant system. Our investigation revealed an increase in total Metallothionein (MT) content which was more pronounced at the sharpest concentrations of Hg. A significant decline of AChE activity was also observed. In the intestine of Hg-treated H. forskali genotoxicity was confirmed by DNA degradation. 相似文献
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Safa Bejaoui Khaoula Telahigue Imene Chetoui Wafa Trabelsi Imen Rabeh Salwa Nechi 《Chemistry and Ecology》2020,36(5):434-457
ABSTRACTLead (Pb) is one of the most toxic heavy metals that affect the physiological status of aquatic organisms. The present investigation evaluated the possible toxic effect of lead chloride (PbCl2) on biomarkers responses, DNA damage and histological alterations in Venus verrucosa gills and digestive gland. Three concentrations of PbCl2 (D1:1µgL?1, D2: 10µgL?1 and D3: 100µgL?1) were chosen for V. verrucosa exposure during six days. At the end of the trial, it was found that Pb tended to accumulate in both gills and digestive gland in a dose-dependent manner. However, gill tissues exhibited the highest metal burden. Our results showed an increase of malondialdehyde, protein carbonyls and advanced oxidation protein product levels in both organs following PbCl2exposure. The induction of both non-enzymatic and enzymatic antioxidant systems; as well as the decrease of the acetylcholinesterase activity and degradation of DNA structure was recorded in the gills and digestive gland. The histopathological alterations observed in gills (disruption of lamellas and cilia filaments?…) and digestive gland (lumens occlusion, necrosis and fibrosis) confirmed the aforementioned results. Our data highlighted the short-term toxicity effects of PbCl2 on V. verrucosa and pointed out a high sensitivity of gills towards this metal. 相似文献
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Agayr Khalid Chanouri Hamza Achiou Brahim Benhida Rachid Khaless Khaoula 《Journal of Material Cycles and Waste Management》2022,24(5):2015-2029
Journal of Material Cycles and Waste Management - Phosphoric acid production industries use the wet process, which leads to enormous quantities of phosphogypsum (PG) as a byproduct. The discharge... 相似文献
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Bouargane Brahim Laaboubi Khaoula Biyoune Mohamed Ghali Bakiz Bahcine Atbir Ali 《Journal of Material Cycles and Waste Management》2023,25(3):1288-1308
Journal of Material Cycles and Waste Management - Phosphogypsum (PG) waste is a by-product generated from wet-process phosphoric acid (H3PO4) manufacturing during phosphate rock... 相似文献
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