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    Assessing the impact of dietary polystyrene nanoplastics on growth performance, immunological parameters, and antioxidant defense in zebrafish (Danio rerio)
    (John Wiley and Sons Inc, 2024) Ahmadifar, Ehsan; Shohreh, Poulin; Kalhor, Naser; Moghadam, Mohsen Shahriari; Yılmaz, Sevdan
    This trial was performed in order to investigate the response of zebrafish (Danio rerio) to dietary exposure to polystyrene nanoplastics (PS-NPs) under laboratory conditions on fish growth and health. Healthy zebrafish (n=240) were divided into 12 tanks and fed with diets including 0 (T0), 100 (T1), 500 (T2), and 1000 (T3) mg kg−1 synthesized polystyrenes nanoplastics (PS-NPs) for 30 days. At the end of trial, fish fed the PS-NPs supplementation showed weight gain percentages of 79.45%, 70.35%, and 61.88% for T1, T2, and T3 groups, respectively, compared with 87.39% in the control fish. The SOD, GPX and MDA activities and cortisol levels increased by 47%, 32% and 35% and 46%, respectively, especially at high-dose administration (p < 0.05). The expression of GPX (T2-81% and T3-82%) and SOD (T2-101% and T3-187%) were remarkably upregulated in T2 and T3 groups. Moreover, the relative gene expression of HSP70, interleukin-1 (IL1), Interferon γ (IFN-γ) and tumor necrosis factor-α (TNF-α) increased by 178%, 202%, 154% and 307%, respectively, especially at high-dose administration (p < 0.05). The results of the present study demonstrated that exposure to PS-NPs especially at high concentrations (500 and 1000 mg kg−1 of diet) negatively influenced growth, health status-, antioxidant-, and immunity-related gene expression responses of zebrafish.
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    Dietary administration of Lactobacillus reuteri and Lactobacillus plantarum reduces whole body oxidative stress and increases immune response, digestive enzyme, growth performance and resistance of zebrafish (Danio rerio) against Aeromonas hydrophila infection
    (Walter De Gruyter Gmbh, 2024) Esfahani, Delaram Eslimi; Ahmadifar, Mehdi; Ebrahimi, Pouya; Ahmadifar, Ehsan; Shohreh, Poulin; Adineh, Hossein; Moghadam, Mohsen Shahriari
    This study evaluated the individual and combined effects of L. plantarum and L. reuteri on the growth performance, digestive enzymes, antioxidant, and immunity-related genes in zebrafish. Six hundred zebrafish (38.19 +/- 1.4 mg) were randomized into twelve tanks (50 fish per), and fed prepared diets comprising un-supplemented (T0), 1 x10(8) CFU/g L. plantarum (T1), 1 x10(11) CFU/kg L. reuteri (T2), and 1 x10(8) CFU/g L. plantarum + 1 x10(11) CFU/kg L. reuteri (T3) for 8 weeks. Experimental diets had meaningful effects on weight gain (WG), final weight (FW), and the highest WG and FW were seen in T3. Fish-fed supplemented diets had higher amylase and lipase activities. No significant differences were seen in protease, pepsin, chymotrypsin, and trypsin activities between treatments. The supplemented groups showed a significant increase in lysozyme activity and total immunoglobulin levels. Meaningful differences were noticed in ACH50, lysozyme activity, total immunoglobulin, and IgM levels. ALT levels were markedly higher in T2 and T3. Catalase (CAT), total antioxidant, and glutathione peroxidase (GPX) activity were significantly impacted by the experimental diets. The experimental diets showed no marked impact on superoxide dismutase (SOD) activity, and malondialdehyde (MDA) values. Relative expressions of CAT, GPX, and SOD genes were notably upper in T3. Moreover, IL1, LYZ, and TNF alpha gene expressions were significantly enhanced in T3 diets. The challenge test with A. hydrophila showed that zebrafish-fed L. plantarum and L. reuteri had a lower mortality rate than the control. Consequently, the combination of L. reuteri and L. plantarum is proposed to improve growth efficiency, immunity, and reduce the negative effects of A. hydrophila infection in zebrafish.
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    Dietray artichoke (Cynara scolymus) extract ameliorated the growth performance, humoral immune parameters and resistance against Aeromonas hydrophila in goldfish (Carassius auratus)
    (Walter De Gruyter Gmbh, 2024) Mousavi, Shalaleh; Mohammadzadeh, Sedigheh; Mood, Sara Mehdizadeh; Ahmadifar, Ehsan; Sheikhzadeh, Najmeh; Kalhor, Naser; Moghadam, Mohsen Shahriari
    This trial investigated the efficacy of artichoke (Cynara scolymus) extract (AE) on the growth performance, immunity, antioxidant parameters, and resistance against Aeromonas hydrophila of goldfish (Carassius auratus). For this purpose, a total number of 470 gold fish with initial weight 5.70 +/- 0.2 g fed with four experimental diets including 0 (T0), 100 (T1), 150 (T2), and 200 (T3) mg kg v diet AE for 8 weeks. At the end of feeding trial, growth performances, serum immune parameters, and mucus antioxidant enzymes were measured. Fish were challenged with A. hydrophila, and the antioxidant and immunity-related gene expression were investigated. Based on the results, the highest final weight (FW) and weight gain (WG) attained in T2 and T3 (P<0.05). Immune factors including ACH50, lysozyme, and total immunoglobulin in T2 and T3 showed the highest values (P<0.05). The expression of GR, IL1 beta, TNF alpha, HSC70, HSP70, and HSP90 beta genes in T1, T2, and T3 were higher than the control (P<0.05). The GST expression was significantly enhanced in T2 (P<0.05). The present study demonstrated that the administration of AE, especially at doses of 150 mg kg(-1), could improve the growth, immunity, and antioxidant parameters, as well as enhance disease resistance against A. hydrophila in goldfish.