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Ileal alkaline phosphatase is upregulated following functional amino acid supplementation in Salmonella Typhimurium-challenged pigs
Journal of Animal Science ( IF 3.3 ) Pub Date : 2021-12-28 , DOI: 10.1093/jas/skab376
Lucas A Rodrigues 1, 2 , Michael O Wellington 1, 2 , J Caroline González-Vega 3 , John K Htoo 3 , Andrew G Van Kessel 2 , Daniel A Columbus 1, 2
Affiliation  

We recently showed that functional amino acid (FAA) supplementation improves growth performance and immune status of Salmonella Typhimurium (ST)-challenged pigs, which was further improved by a longer adaptation period. It is expected that the effects are associated with increased activity of intestinal alkaline phosphatase (IAP). The objective of this study was to evaluate the effects of FAA supplementation and adaptation period on the ileal, cecal, and colonic activity of IAP in weaned pigs challenged with ST. In experiment 1, a total of 32 mixed-sex weanling pigs were randomly assigned to dietary treatments in a 2 × 2 factorial arrangement with low (LP) or high protein (HP) content and basal (FAA–) or FAA profile (FAA+; Thr, Met, and Trp at 120% of requirements) as factors. In experiment 2, a total of 32 mixed-sex weanling pigs were randomly assigned to one of four dietary treatments, being FAA− fed throughout the experimental period (FAA−) or an FAA profile fed only in the post-inoculation (FAA + 0), for 1 wk pre- and post-inoculation (FAA + 1), or throughout the experimental period (FAA + 2). In experiments 1 and 2, after a 7- and 14-d adaptation period, respectively, pigs were inoculated with saline solution containing ST (3.3 and 2.2 × 109 CFU/mL, respectively). Plasma alkaline phosphatase was measured on days 0 and 7 post-inoculation in experiment 1, and IAP (ileum, cecum, and colon) was measured in experiments 1 and 2. Correlations among ileal IAP and serum albumin and haptoglobin, plasma superoxide dismutase (SOD), malondialdehyde (MDA), and reduced:oxidized glutathione, ileal myeloperoxidase, ST shedding and ileal colonization, and post-inoculation average daily gain, feed intake (ADFI), and gain:feed were also analyzed. In experiment 1, plasma alkaline phosphatase was decreased with ST inoculation and the overall content was increased in LP-FAA+ compared with LP-FAA− (P < 0.05). Moreover, ileal IAP was increased in FAA+ compared with FAA− pigs in both studies (P < 0.05) regardless of adaptation time (P > 0.05). IAP was positively correlated with MDA and ADFI and negatively correlated with SOD and ST shedding in experiment 1 (P < 0.05). These results demonstrate a positive effect of FAA supplementation, but not adaptation period, on ileal alkaline phosphatase activity in Salmonella-challenged pigs, which may be associated with improvements in antioxidant balance.

中文翻译:

在鼠伤寒沙门氏菌攻击的猪中补充功能性氨基酸后回肠碱性磷酸酶上调

我们最近表明,补充功能性氨基酸 (FAA) 可改善鼠伤寒沙门氏菌 (ST) 攻击猪的生长性能和免疫状态,并通过更长的适应期进一步改善。预计这些影响与肠道碱性磷酸酶 (IAP) 的活性增加有关。本研究的目的是评估补充 FAA 和适应期对接受 ST 攻击的断奶仔猪回肠、盲肠和结肠 IAP 活性的影响。在实验 1 中,共有 32 头混合性别的断奶仔猪被随机分配到具有低 (LP) 或高蛋白质 (HP) 含量和基础 (FAA–) 或 FAA 概况 (FAA+; Thr、Met 和 Trp 在 120% 的要求)作为因素。在实验 2 中,总共 32 头混合性别的断奶仔猪被随机分配到四种日粮处理中的一种,在整个实验期间喂养 FAA- (FAA-) 或仅在接种后喂养 FAA 模式 (FAA + 0),对于 1接种前和接种后一周 (FAA + 1),或整个实验期间 (FAA + 2)。在实验 1 和 2 中,分别经过 7 天和 14 天的适应期后,给猪接种含 ST 的盐水溶液(分别为 3.3 和 2.2 × 109 CFU/mL)。在实验 1 中接种后第 0 天和第 7 天测量血浆碱性磷酸酶,在实验 1 和 2 中测量 IAP(回肠、盲肠和结肠)。回肠 IAP 与血清白蛋白和触珠蛋白、血浆超氧化物歧化酶 (SOD) 之间的相关性)、丙二醛 (MDA) 和还原型:氧化型谷胱甘肽、回肠髓过氧化物酶、还分析了 ST 脱落和回肠定植、接种后平均日增重、采食量 (ADFI) 和增重:饲料。在实验 1 中,与 LP-FAA- 相比,接种 ST 后血浆碱性磷酸酶降低,LP-FAA+ 中的总含量增加(P < 0.05)。此外,在两项研究中,与 FAA- 猪相比,FAA+ 猪的回肠 IAP 增加 (P < 0.05),而与适应时间无关 (P > 0.05)。实验1中IAP与MDA、ADFI呈正相关,与SOD、ST脱落呈负相关(P<0.05)。这些结果表明,补充 FAA 对沙门氏菌攻击猪的回肠碱性磷酸酶活性有积极影响,但对适应期没有影响,这可能与抗氧化平衡的改善有关。还分析了采食量 (ADFI) 和增重:采食量。在实验 1 中,与 LP-FAA- 相比,接种 ST 后血浆碱性磷酸酶降低,LP-FAA+ 中的总含量增加(P < 0.05)。此外,在两项研究中,与 FAA- 猪相比,FAA+ 猪的回肠 IAP 增加 (P < 0.05),而与适应时间无关 (P > 0.05)。实验1中IAP与MDA、ADFI呈正相关,与SOD、ST脱落呈负相关(P<0.05)。这些结果表明,补充 FAA 对沙门氏菌攻击猪的回肠碱性磷酸酶活性有积极影响,但对适应期没有影响,这可能与抗氧化平衡的改善有关。还分析了采食量 (ADFI) 和增重:采食量。在实验 1 中,与 LP-FAA- 相比,接种 ST 后血浆碱性磷酸酶降低,LP-FAA+ 中的总含量增加(P < 0.05)。此外,在两项研究中,与 FAA- 猪相比,FAA+ 猪的回肠 IAP 增加 (P < 0.05),而与适应时间无关 (P > 0.05)。实验1中IAP与MDA、ADFI呈正相关,与SOD、ST脱落呈负相关(P<0.05)。这些结果表明,补充 FAA 对沙门氏菌攻击猪的回肠碱性磷酸酶活性有积极影响,但对适应期没有影响,这可能与抗氧化平衡的改善有关。与 LP-FAA- 相比,ST 接种后血浆碱性磷酸酶降低,LP-FAA+ 中的总含量增加(P < 0.05)。此外,在两项研究中,与 FAA- 猪相比,FAA+ 猪的回肠 IAP 增加 (P < 0.05),而与适应时间无关 (P > 0.05)。实验1中IAP与MDA、ADFI呈正相关,与SOD、ST脱落呈负相关(P<0.05)。这些结果表明,补充 FAA 对沙门氏菌攻击猪的回肠碱性磷酸酶活性有积极影响,但对适应期没有影响,这可能与抗氧化平衡的改善有关。与 LP-FAA- 相比,ST 接种后血浆碱性磷酸酶降低,LP-FAA+ 中的总含量增加(P < 0.05)。此外,在两项研究中,与 FAA- 猪相比,FAA+ 猪的回肠 IAP 增加 (P < 0.05),而与适应时间无关 (P > 0.05)。实验1中IAP与MDA、ADFI呈正相关,与SOD、ST脱落呈负相关(P<0.05)。这些结果表明,补充 FAA 对沙门氏菌攻击猪的回肠碱性磷酸酶活性有积极影响,但对适应期没有影响,这可能与抗氧化平衡的改善有关。05) 无论适应时间如何 (P > 0.05)。实验1中IAP与MDA、ADFI呈正相关,与SOD、ST脱落呈负相关(P<0.05)。这些结果表明,补充 FAA 对沙门氏菌攻击猪的回肠碱性磷酸酶活性有积极影响,但对适应期没有影响,这可能与抗氧化平衡的改善有关。05) 无论适应时间如何 (P > 0.05)。实验1中IAP与MDA、ADFI呈正相关,与SOD、ST脱落呈负相关(P<0.05)。这些结果表明,补充 FAA 对沙门氏菌攻击猪的回肠碱性磷酸酶活性有积极影响,但对适应期没有影响,这可能与抗氧化平衡的改善有关。
更新日期:2021-12-28
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