三丁酸甘油酯、α-酮戊二酸和丙氨酰–谷氨酰胺对罗氏沼虾生长性能、消化酶活性和免疫基因表达的影响
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杨欣(1996–),男,硕士研究生,从事水生动物营养研究.E-mail:yx1174810987@163.com

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S963

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国家自然科学基金项目(31972800).


Effects of tributyrin, α-ketoglutarate, and alanyl-glutamine on the growth performance, digestive enzyme activity, and immune gene expression of Macrobrachium rosenbergii
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    摘要:

    本研究旨在探讨三丁酸甘油酯(tributyrin, TB)、α-酮戊二酸(α-ketoglutarate, AKG)和丙氨酰-谷氨酰胺 (alanyl-glutamine, Ala-Gln)对罗氏沼虾(Macrobrachium rosenbergii)生长性能、消化酶活性和免疫相关基因表达的影响。以添加 40.00%豆粕和 33.70%花生粕两种饲料为对照组(命名为 SM 组和 PM 组), 分别在豆粕饲料中添加 0.10%、 0.20%的 TB (TB1 和 TB2 组), 1.00%、2.00%的 AKG (AKG1 和 AKG2 组), 1.00%、2.00%的 Ala-Gln (AGn1 和 AGn2 组), 配制 8 种等氮等能饲料。选取初始体重为(0.10±0.02) g 的罗氏沼虾 640 尾, 随机分为 8 组, 每组 4 个重复, 每个重复 20 尾, 实验期为 8 周。结果表明, 与 SM 组相比, TB、AKG 和 AGn 组对罗氏沼虾生长性能、血清超氧化物歧化酶活性和丙二醛含量、TOR 和 caspase-3 基因表达无显著影响(P>0.05), TB、AKG 和 AGn 组的消化酶活性显著提高(P<0.05), 且 AGn2 组显著高于其他试验组(P<0.05)。此外, AKG1 组 caspase-8 相对表达量显著高于其他饲料组(P<0.05), PM 组和 TB 组的 TNF-α 相对表达量显著降低(P<0.05)。结果可知, 饲料中添加 TB、AKG 和 Ala-Gln 对罗氏沼虾生长性能和抗氧化功能没有显著影响; 添加 TB、AKG 和 Ala-Gln 对罗氏沼虾消化酶活性均具有明显的改善作用, 其中添加 2% Ala-Gln 改善作用最佳; 豆粕与花生粕相比可上调罗氏沼虾 TNF-α 的表达, 添加 TB 可以抑制这种基因表达。

    Abstract:

    Due to the current low production levels and high price of fish meal, soybean meal has become the best source of protein for replacing fish meal in aquatic feed, as it is rich in crude protein and has a balanced amino acid composition. However, soybeans and their products contain anti-nutritional factors such as trypsin inhibitors, soybean antigen protein, saponins, and oligosaccharides, which cause significant intestinal injury in aquatic animals and are likely to cause intestinal diseases. To maintain the intestinal health of aquatic animals, some functional additives can be added to soybean meal feed to improve intestinal health. Among them, tributyrin (TB), α-ketoglutarate (AKG), and alanyl-glutamine (Ala-Gln) can promote intestinal development and improve intestinal health. This experiment examines the effects of TB, AKG, and Ala-Gln on the growth, digestive enzyme activity, and immune function gene expression of Macrobrachium rosenbergii. Two feeds supplemented with 40% soybean meal and 33.70% peanut meal, respectively, were used as the control groups (named SM group and PM group), while 0.10% and 0.20% TB (TB1 group and TB2 group), 1.00% and 2.00% of AKG (AKG1 group and AKG2 group), 1.00% and 2.00% of Ala-Gln (AGn1 group and AGn2 group) were added to soybean meal feed, respectively, to form 8 kinds of isonitrogenous and isoenergetic feed for M. rosenbergii. A total of 640 M. rosenbergii with an initial weight of (0.10±0.02) g were selected and randomly divided into 8 groups with 4 replicates in each group and 20 tails in each replicate. The trial period was 8 weeks. Compared with the soybean meal group, the TB, AKG, and AGn groups exhibited no significant differences in growth performance, serum superoxide dismutase activity, malondialdehyde content, TOR, or caspase-3 gene expression of M. rosenbergii (P>0.05). Intestinal and hepatopancreas lipase, trypsin, and α-amylase digestive enzyme activities of the TB, AKG, and AGn2 groups were significantly increased (P<0.05), and these activities were significantly higher in the AGn2 group than in other experimental groups (P<0.05). The trypsin activity in the intestine of the AKG2 group was second and was significantly higher than in the other groups (P<0.05). Although the greatest α-amylase activity in the intestine was seen in the AKG1 group and was significantly higher than that in the other groups (P<0.05), and the relative expression of caspase-8 was significantly higher in the AKG1 group than in the other groups (P<0.05), the relative expression of TNF-α was significantly lower in the PM group and the TB group (P<0.05). The results show that the addition of TB, AKG, and Ala-Gln had no effect on the growth performance and antioxidant function of M. rosenbergii. The addition of TB, AKG, and Ala-Gln can improve digestive enzyme activity and the addition of 2% Ala-Gln significantly improved the activity of digestive enzymes. Soybean meal is more effective than peanut meal for up-regulating the expression of TNF-α. Adding TB can reduce the expression of inflammatory proteins and intestinal cell apoptosis caused by TNF-α in M. rosenbergii.

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杨欣,赵静怡,叶金云,杨国梁,徐奇友.三丁酸甘油酯、α-酮戊二酸和丙氨酰–谷氨酰胺对罗氏沼虾生长性能、消化酶活性和免疫基因表达的影响[J].中国水产科学,2022,29(6):854-863
YANG Xin, ZHAO Jingyi, YE Jinyu, YANG Guoliang, XU Qiyou. Effects of tributyrin, α-ketoglutarate, and alanyl-glutamine on the growth performance, digestive enzyme activity, and immune gene expression of Macrobrachium rosenbergii[J]. Journal of Fishery Sciences of China,2022,29(6):854-863

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  • 在线发布日期: 2022-07-19
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