Dietary mixed Bacillus strains promoted the growth indices, enzymatic profile, intestinal immunity, and liver and intestinal histomorphology of Nile tilapia, Oreochromis niloticus

俄勒冈 尼罗罗非鱼 生物 益生菌 短小芽孢杆菌 淀粉酶 地衣芽孢杆菌 尿酸 饲料转化率 溶菌酶 消化酶 体重增加 食品科学 枯草芽孢杆菌 微生物学 生物化学 内分泌学 体重 细菌 遗传学 渔业
作者
Mai A.M. El-Son,Gehad E. Elshopakey,Shaymaa Rezk,Elsayed A. Eldessouki,Samia Elbahnaswy
出处
期刊:Aquaculture Reports [Elsevier BV]
卷期号:27: 101385-101385 被引量:11
标识
DOI:10.1016/j.aqrep.2022.101385
摘要

In the current investigation, a 4-week feeding trial was carried out to study the special effects of the dietary probiotic, Sanolife® PRO-F (a combination of Bacillus subtilis 3.25 × 109 CFU/g, Bacillus licheniformis 3.50 × 109 CFU/g, and Bacillus pumilus 3.25 × 109 CFU/g) supplementation on growth performance, serum biochemical immune parameters, intestinal digestive enzymes activities, antioxidants assay, and the expression of pro-inflammatory cytokines and antioxidant-related genes with a specific reference to intestinal histomorphometry of Nile tilapia, Oreochromis niloticus, which fed with Sanolife® PRO-F at 0 (B0), 0.5 (B0.5) and 1 (B1) g kg−1 diet, respectively. At the end of the feeding trial, the achieved results revealed that Bacillus strains probiotic supplementation significantly improved the growth performance including final body weight (FBW), weight gain (WG), specific growth rate (SGR), and feed utilization when matched to the control group (p < 0.05). Concerning serum biochemical parameters, there was a significant reduction in the serum cholesterol and triglyceride levels in fish-fed Bacillus strains (p < 0.01). Serum lysozyme activity showed greater values in the case of the B0.5 and B1 groups (p < 0.01) compared with the control. No changes were estimated in the levels of glucose, hepatic (alanine aminotransferase (ALT) and aspartate aminotransferase (AST), and renal biomarkers (Urea, Creatinine, and Uric acid) in the serum of fish-fed B0.5 and B1 diets. Additionally, the specific activities of protease, amylase, and lipase enzymes were significantly increased upon Bacillus strains՚s incorporation in O. niloticus diets. As well, the antioxidant capacity of catalase (CAT) and superoxide dismutase (SOD) enzymes in the liver and spleen were significantly increased with diminished malondialdehyde (MDA) levels. Correspondingly, the mRNA expression of the antioxidant glutathione peroxidase (GPx) enzyme in the intestinal tissue was notably increased in the control group. The length of intestinal villi, absorptive epithelium, and goblet cell counts were greater in O. niloticus fed on Bacillus strains diets. Given the obtained results, the dietary supplementation of Sanolife® PRO-F to Nile tilapia, O. niloticus at 0.5 g kg 1 and 1 g kg−1 diet can recover the growth, feed utilization, and health condition with the safety of Sanolife® PRO-F probiotic supplementation on liver and kidney function.
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