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Dietary administration effects of exopolysaccharide from potential probiotic strains on immune and antioxidant status and nutritional value of European sea bass (Dicentrarchus labrax L.).
Research in Veterinary Science ( IF 2.2 ) Pub Date : 2020-04-06 , DOI: 10.1016/j.rvsc.2020.04.008 Abdelkarim Mahdhi 1 , Ibtissem Chakroun 1 , Cristóbal Espinosa-Ruiz 2 , Concetta Maria Messina 3 , Rosaria Arena 3 , Hatem Majdoub 4 , Andrea Santulli 3 , Ridha Mzoughi 1 , Maria Angeles Esteban 5
Research in Veterinary Science ( IF 2.2 ) Pub Date : 2020-04-06 , DOI: 10.1016/j.rvsc.2020.04.008 Abdelkarim Mahdhi 1 , Ibtissem Chakroun 1 , Cristóbal Espinosa-Ruiz 2 , Concetta Maria Messina 3 , Rosaria Arena 3 , Hatem Majdoub 4 , Andrea Santulli 3 , Ridha Mzoughi 1 , Maria Angeles Esteban 5
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The use of biological immunostimulants is considered a valuable practice to improve culture conditions in aquaculture sector that may help to increase production and maintain healthy environment. We undertook this study in order to evaluate the potential effect of the administration of two exopolysaccharides (EPS) "EPLB" and "EPB" derived from potential probiotic strains on immune and antioxidant status of European sea bass (Dicentrarchus labrax L.) larvae. In order to find out if the EPSs have an effect on the biochemical composition during the trial period, the nutritional value has been evaluated. The results revealed that expression levels of immune-relevant genes (infg, Il1b, Il8, Il6 and tcr-β) in the gut and head kidney and the scavenging enzymes (cat, sod, gr) genes in the liver were modulated. In fact, the dietary supplementation with the tested EPSs, significantly enhances the expression of immune-associated genes in the head-kidney, particularly infg and tcrβ, as well as catalase gene in liver. During the period of study, EPSs administration did not affect the fatty acid profiles of larvae, which is balanced. This is confirmed by the Docosahexaenoic acid / Eicosapentaenoic acid ratio and demonstrates that EPLB and EPB can be administrated without any negative effect on biochemical composition of European sea bass. The present findings provided evidence that the tested EPSs with antibacterial and antioxidant activities can enhance immune response without negative effect on the biochemical composition. The used EPSs can be considered as a good source of natural functional aquafeed ingredients for European sea bass.
中文翻译：
潜在益生菌菌株的胞外多糖对欧洲鲈鱼（Dicentrarchus labrax L.）的免疫和抗氧化状态及营养价值的饮食管理作用。
生物免疫刺激剂的使用被认为是改善水产养殖部门养殖条件的有价值的实践，这可能有助于增加产量并保持健康的环境。我们进行了这项研究，以评估施用来自潜在益生菌菌株的两种胞外多糖（EPS）“ EPLB”和“ EPB”对欧洲鲈鱼（Dicentrarchus labrax L.）幼虫的免疫和抗氧化状态的潜在影响。为了确定EPS在试验期间是否对生化成分有影响，已对营养价值进行了评估。结果表明，调节了免疫相关基因（infg，Il1b，Il8，Il6和tcr-β）在肠和头肾中的表达水平以及肝脏中的清除酶（cat，sod，gr）基因的表达水平。事实上，在饮食中添加经测试的EPS，可显着增强头肾中免疫相关基因的表达，尤其是infg和tcrβ，以及肝脏中的过氧化氢酶基因。在研究期间，EPS的施用并未影响幼虫的脂肪酸分布，这是平衡的。二十二碳六烯酸/二十碳五烯酸的比例证实了这一点，并证明可以施用EPLB和EPB，而对欧洲鲈鱼的生化成分没有任何负面影响。目前的发现提供了证据，表明具有抗菌和抗氧化活性的被测EPS可以增强免疫反应，而对生化组成没有负面影响。所使用的EPS可被视为欧洲鲈鱼天然功能性水产饲料原料的良好来源。
更新日期：2020-04-14
中文翻译：
潜在益生菌菌株的胞外多糖对欧洲鲈鱼（Dicentrarchus labrax L.）的免疫和抗氧化状态及营养价值的饮食管理作用。
生物免疫刺激剂的使用被认为是改善水产养殖部门养殖条件的有价值的实践，这可能有助于增加产量并保持健康的环境。我们进行了这项研究，以评估施用来自潜在益生菌菌株的两种胞外多糖（EPS）“ EPLB”和“ EPB”对欧洲鲈鱼（Dicentrarchus labrax L.）幼虫的免疫和抗氧化状态的潜在影响。为了确定EPS在试验期间是否对生化成分有影响，已对营养价值进行了评估。结果表明，调节了免疫相关基因（infg，Il1b，Il8，Il6和tcr-β）在肠和头肾中的表达水平以及肝脏中的清除酶（cat，sod，gr）基因的表达水平。事实上，在饮食中添加经测试的EPS，可显着增强头肾中免疫相关基因的表达，尤其是infg和tcrβ，以及肝脏中的过氧化氢酶基因。在研究期间，EPS的施用并未影响幼虫的脂肪酸分布，这是平衡的。二十二碳六烯酸/二十碳五烯酸的比例证实了这一点，并证明可以施用EPLB和EPB，而对欧洲鲈鱼的生化成分没有任何负面影响。目前的发现提供了证据，表明具有抗菌和抗氧化活性的被测EPS可以增强免疫反应，而对生化组成没有负面影响。所使用的EPS可被视为欧洲鲈鱼天然功能性水产饲料原料的良好来源。
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