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当前位置: 首页 > 文章 > 乳酸锌对仔猪小肠形态学、小肠黏膜金属硫蛋白1和组织急性期蛋白mRNA表达的影响 动物营养学报 2014,26 (4) 1068-1076
Position: Home > Articles > Effects of Zinc Lactate on Intestinal Morphology,mRNA Expressions of Metallothioneins 1 in Intestinal Mucosa and Acute Phase Proteins in Tissues of Weaner Piglets Chinese Journal of Animal Nutrition 2014,26 (4) 1068-1076

乳酸锌对仔猪小肠形态学、小肠黏膜金属硫蛋白1和组织急性期蛋白mRNA表达的影响

作  者：
王荣蛟;信爱国;张春勇;李美荃;梅文南;安清聪;陈克嶙;郭荣富
单  位：
云南省畜牧兽医科学院;云南农业大学动物科技学院
关键词：
仔猪;乳酸锌;小肠形态学;金属硫蛋白;急性期蛋白
摘  要：
本试验旨在研究乳酸锌对"杜洛克×长白×约克"(DLY)仔猪生长性能、小肠形态学、小肠黏膜金属硫蛋白1(MT1)和组织急性期蛋白(APP)mRNA表达的影响,探索乳酸锌对仔猪免疫调节的机制。选用24头(公母各占1/2)35日龄DLY仔猪为研究对象,试验猪随机分为对照组和试验组,每组12个重复,每个重复1头猪。对照组饲喂基础饲粮,试验组饲喂在基础饲粮中添加乳酸锌,使锌添加量达到100 mg/kg的试验饲粮。试验期25 d。结果表明,添加乳酸锌显著提高仔猪生长性能(P<0.05),极显著增加小肠绒毛长度和降低隐窝深度(P<0.01)。添加乳酸锌显著诱导仔猪十二指肠、空肠、回肠黏膜MT1 mRNA和肝脏、胰脏、脾脏、肾脏、十二指肠、空肠、回肠组织APP mRNA表达上调(P<0.05),小肠MT1 mRNA表达谱为:空肠>十二指肠>回肠;被检测的C-反应蛋白(CRP)、触珠蛋白(HP)、α1-酸性糖蛋白(AGP)和血清淀粉样蛋白A(SAA)mRNA以胰腺、肾脏和肝脏表达量最高,而脾脏和十二指肠则微量表达。结果提示,添加乳酸锌可极显著增加仔猪小肠绒毛长度,降低隐窝深度,改善养分消化利用;通过提高十二指肠、空肠和回肠黏膜MT1 mRNA表达量,诱导机体组织CRP、HP、AGP和SAA mRNA表达上调的方式,增加仔猪的抗病能力,从而改善仔猪的生长性能。
译  名：
Effects of Zinc Lactate on Intestinal Morphology,mRNA Expressions of Metallothioneins 1 in Intestinal Mucosa and Acute Phase Proteins in Tissues of Weaner Piglets
作  者：
WANG Rongjiao;XIN Aiguo;ZHANG Chunyong;LI Meiquan;MEI Wennan;AN Qingcong;CHEN Kelin;GUO Rongfu;Yunnan Animal Nutrition and Feed Laboratory,College of Animal Science and Technology,Yunnan Agricultural University;Yunnan Animal Science and Veterinary Institute;
关键词：
weaner piglets;;zinc lactate;;intestinal morphology;;MTs;;APPs
摘  要：
This study was conducted to investigate the effects of zinc lactate on growth performance,intestinal morphology,metallothioneins l(MTl) in intestinal mucosa and acute phase proteins(APP) mRNA expression in tissues,of 'duroc X landrace X york'(DLY) weaner piglets Twenty-four(half male and half female)35-day-old DLY weaner piglets in this study were randomly divided into control group and experimental group with 12 replicates per group and 1 piglet per replicate.Control group was fed a basal diet,while the experimental group was fed an experimental diet which was the basal diet added with zinc lactate(zinc added level at100 mg/kg).The experiment lasted for 25 days.The results showed that,adding zinc lactate significantly improved the growth performance of weaner piglet(P <0.05),significantly increased villi length and decreased crypt depth of piglets(P <0.01),and significantly induced the upregulation of MTl mRNA expression in duodenum,jejunum and ileum mucosa and APP mRNA expression in liver,pancreas,spleen,kidney,duodenum,jejunum and ileum of piglets(P <0.05).MTl mRNA expression profile in small intestine was jejunum,duodenum and ileum,respectively) mRNA expressions of C-reactive protein(CRP),haptoglobin(HP),αl-acid glycoprotein(AGP) and serum amyloid-A(SAA) were detected the highest in the pancreas,kidney and liver,but trace expression in spleen and duodenum.It is suggested that zinc lactate significantly increase small intestinal villi length,decrease crypt depth,and zinc lactate may improve nutrient utilization,inducing the upregulation of CRP,HP,AGP and SAA mRNA expression in tissues by increasing MTl mRNA expression in duodenum,jejunum and ileum,and increase disease resistance of piglets,thereby growth performance can be improved for weaner piglets.

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