10 فروردین 1403
ابراهيم ستوده

ابراهیم ستوده

مرتبه علمی: دانشیار
نشانی: دانشکده علوم و فناوری نانو و زیستی - گروه علوم شیلاتی
تحصیلات: دکترای تخصصی / مهندسی منابع طبیعی
تلفن: 09173740528
دانشکده: دانشکده علوم و فناوری نانو و زیستی

مشخصات پژوهش

عنوان Salinity modulates biochemical and histopathological changes caused by silver nanoparticles in juvenile Persian sturgeon (Acipenser persicus)
نوع پژوهش مقالات در نشریات
کلیدواژه‌ها
Metal nanoparticles, Nanoecotoxicology, Histopathology,Colloidal silver, Persian sturgeon, Gills
مجله ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
شناسه DOI 10.1007/s11356-020-07687-7
پژوهشگران اشکان بنان (نفر اول) ، محمد رضا کلباسی (نفر دوم) ، محمود بهمنی (نفر سوم) ، ابراهیم ستوده (نفر چهارم) ، سیدعلی جوهری (نفر پنجم) ، Alan S Kolok (نفر ششم به بعد) ، Jonathan M Ali (نفر ششم به بعد)

چکیده

The objective of this study was to evaluate the effect of salinity on the acute and sub-chronic toxicity of silver nanoparticles (AgNPs) in Persian sturgeon. This was evaluated by exposing Persian sturgeon to AgNPs in three salinities: freshwater (F: 0.4 ppt), brackish water 1 (B1: 6?±?0.2 ppt), and brackish water 2 (B2: 12?±?0.3 ppt) for 14 days, which was followed by analysis of alterations in plasma chemistry and histopathology of the gills, liver, and intestine. Values of 96-h median lethal concentration (LC50) were calculated as 0.89 mg/L in F, 2.07 mg/L in B1, and 1.59 mg/L in B2. After sub-chronic exposures, plasma cortisol, glucose, potassium, and sodium levels illustrated no significant changes within each salinity level. In F, 0.2 mg/L AgNP caused the highest levels of alkaline phosphatase and osmolality levels. In B1, 0.6 mg/L AgNP induced the highest level of alkaline phosphatase and elevated plasma osmolality was recorded in all AgNP-exposed treatments in comparison with the controls. The B2 treatment combined with 0.6 mg/L AgNP significantly reduced plasma chloride level. The results showed elevating salinity significantly increased osmolality, chloride, sodium, and potassium levels of plasma in the fish exposed to AgNPs. The abundance of the tissue lesions was AgNP concentration-dependent, where the highest number of damages was observed in the gills, followed by liver and intestine, respectively. The histopathological study also confirmed alterations such as degeneration of lamella, lifting of lamellar epithelium, hepatic vacuolation, pyknotic nuclei, and cellular infiltration of the lamina propria elicited by AgNPs in the gills, liver, and intestine of Persian sturgeon. In conclusion, the stability of AgNPs in aquatic environments can be regulated by changing the salinity, noting that AgNPs are more stable in low salinity waters.