The present research was designed to study the association of polymorphism of natural resistance-associated macrophage proteinl (Nrampl) with some immune function and the production performance in Large White pig. T...The present research was designed to study the association of polymorphism of natural resistance-associated macrophage proteinl (Nrampl) with some immune function and the production performance in Large White pig. The PCR-RFLP technique was applied to analyze the correlation between the polymorphisms of Nrampl gene and immune function [value of Polymorphonuclear Leukocytes (PMN) obtained by Nitroblue Tetrazolium (NBT) Reduction and effect of Cytotoxin in Monocyte] and production performance in 165 Large White pigs. The results showed that there was one Nde I restriction locus in Large White pig, and both values of PMN by NBT Reduction and effect of Cytotoxin in Monocyte in genotype BB were higher than those in genotype AB (P〈0.05). Simultaneously, the weight of 180-day-old pigs with genotype BB was higher than that with genotype AB (P〈0.05). The results indicated that there was a significant correlation between different genotypes of Nrampl gene and Immune function and production performance, and it can be regarded as a candidate gene of disease resistance. All these results provide valuable reference to further studies of pig disease resistance.展开更多
猪天然抗性相关巨噬细胞蛋白基因1(Naturalresistance-associated Marophage Protein 1,Nramp1)作为影响抗病力的重要候选基因之一,在机体的免疫过程中发挥着重要的调控作用。为了在细胞水平上探讨Nramp1基因与引起仔猪腹泻的致病性大...猪天然抗性相关巨噬细胞蛋白基因1(Naturalresistance-associated Marophage Protein 1,Nramp1)作为影响抗病力的重要候选基因之一,在机体的免疫过程中发挥着重要的调控作用。为了在细胞水平上探讨Nramp1基因与引起仔猪腹泻的致病性大肠杆菌的关系及其在大肠杆菌感染过程中发挥的免疫调控作用,本研究利用F18ab、F18ac和K88ac等3种致病性大肠杆菌刺激体外培养的猪肠上皮细胞IPEC-J2,并利用实时荧光定量PCR检测3种菌体刺激IPEC-J2后Nramp1基因的表达变化情况。结果表明:F18ab、F18ac和K88ac 3种大肠杆菌刺激IPEC-J2后,Nramp1基因的表达均发生极显著(P<0.01)上调,差异倍数分别为10、8、11倍,且F18ab和K88ac 2种菌体刺激后Nramp1基因的表达上调程度均极显著高于F18ac。本研究结果提示,Nramp1基因的表达与大肠杆菌的侵染有很大的相关性,其在大肠杆菌侵袭猪肠道中发挥了重要的免疫调控作用。本研究在细胞水平分析探讨了Nramp1基因的表达与3种致病性大肠杆菌侵袭的关系,为Nramp1基因在大肠杆菌侵染机体的过程中发挥的免疫调控作用研究提供了参考依据。展开更多
文摘The present research was designed to study the association of polymorphism of natural resistance-associated macrophage proteinl (Nrampl) with some immune function and the production performance in Large White pig. The PCR-RFLP technique was applied to analyze the correlation between the polymorphisms of Nrampl gene and immune function [value of Polymorphonuclear Leukocytes (PMN) obtained by Nitroblue Tetrazolium (NBT) Reduction and effect of Cytotoxin in Monocyte] and production performance in 165 Large White pigs. The results showed that there was one Nde I restriction locus in Large White pig, and both values of PMN by NBT Reduction and effect of Cytotoxin in Monocyte in genotype BB were higher than those in genotype AB (P〈0.05). Simultaneously, the weight of 180-day-old pigs with genotype BB was higher than that with genotype AB (P〈0.05). The results indicated that there was a significant correlation between different genotypes of Nrampl gene and Immune function and production performance, and it can be regarded as a candidate gene of disease resistance. All these results provide valuable reference to further studies of pig disease resistance.