Background: Marek’s disease(MD) is a highly contagious pathogenic and oncogenic disease primarily affecting chickens. However, the mechanisms of genetic resistance for MD are complex and not fully understood. MD-resi...Background: Marek’s disease(MD) is a highly contagious pathogenic and oncogenic disease primarily affecting chickens. However, the mechanisms of genetic resistance for MD are complex and not fully understood. MD-resistant line 63and MD-susceptible line 72are two highly inbred progenitor lines of White Leghorn. Recombinant Congenic Strains(RCS) were developed from these two lines, which show varied susceptibility to MD.Results: We investigated genetic structure and genomic signatures across the genome, including the line 63and line72, six RCSs, and two reciprocally crossed flocks between the lines 63and 72(F1 63× 72and F1 72× 63) using Affymetrix~? Axiom~? HD 600 K genotyping array. We observed 18 chickens from RCS lines were specifically clustered into resistance sub-groups distributed around line 63. Additionally, homozygosity analysis was employed to explore potential genetic components related to MD resistance, while runs of homozygosity(ROH) are regions of the genome where the identical haplotypes are inherited from each parent. We found several genes including SIK, SOX1, LIG4, SIK1 and TNFSF13B were contained in ROH region identified in resistant group(line 63and RCS), and these genes have been reported that are contribute to immunology and survival. Based on FSTbased population differential analysis, we also identified important genes related to cell death and anti-apoptosis, including AKT1, API5, CDH13, CFDP and USP15,which could be involved in divergent selection during inbreeding process.Conclusions: Our findings offer valuable insights for understanding the genetic mechanism of resistance to MD and the identified genes could be considered as candidate biomarkers in further evaluation.展开更多
The experiment was conducted to study the dynamic changes of immune responses of chicks immunized with March's disease(MD)trivalent vaccine and turkey herpesvirus(HVT)at one day age.Results were found that after i...The experiment was conducted to study the dynamic changes of immune responses of chicks immunized with March's disease(MD)trivalent vaccine and turkey herpesvirus(HVT)at one day age.Results were found that after immunization of chicks with MD vaccines,the intcrlcukinc-2(IL-2)inductive activity and IL-2 receptor expression of T cells from thymus and spleen significantly increased,suggesting that the immunoregulativc function was markedly enhanced in the immune organs;the number of antibody-producing cells,the number and proliferative function of T cells rose markedly in Bursa Fabricius,spleen and thymus,indicating that the cellular and humoral immune responses were elevated remarkablly in the central and peripheral immune organs;the number of T and antibody-producing cells as well as the content of IgG,IgA and IgM obviously mounted in cecal tonsil, Harder tan gland mucosal lymphoid tissues of bronchus along with tears,trachea washings, bile and intestinal fluids,demonstrating that the local and mucosal immunity was raised in the respiratory and digestive tract;the levels of immune responses mentioned above in the trivalent vaccine-immuniaed chicks were apparently higher than those of HVT-immunized birds.展开更多
目的分析频发急性加重慢性阻塞性肺疾病(COPD)表型患者的临床特征。方法收集2016年01月至2017年01月在上海交通大学医学院附属新华医院崇明分院呼吸科住院被诊断为AECOPD患者136例,综合急性加重频率,将AECOPD患者分为频发急性加重型(57...目的分析频发急性加重慢性阻塞性肺疾病(COPD)表型患者的临床特征。方法收集2016年01月至2017年01月在上海交通大学医学院附属新华医院崇明分院呼吸科住院被诊断为AECOPD患者136例,综合急性加重频率,将AECOPD患者分为频发急性加重型(57例),非频发急性加重型(79例)两组,对两组患者的基线资料、肺功能、炎症指标及共患病进行分析比较。结果 COPD评估测试(CAT评分)频发组患者两次入院前稳定期均明显高于非频发组(13.3±4.1 vs 11.4±2.7,P<0.01;13.1±4.3 vs 11.4±2.7,P<0.01);且频发组患者两次住院好转后肺功能检查,其中FEV1值均明显降低(0.85±0.34Lvs 1.00±0.39L,P<0.05;0.83±0.38Lvs 1.00±0.39L,P<0.05),肺功能处于III/IV级患者比例也明显高于非频发组(均P<0.05)。血气分析发现,与非频发组患者相比,频发组患者两次住院动脉血PH、Pa O2均明显降低,且PCO2均升高,差异均有统计学意义(均P<0.05)。频发组患者两次住院白细胞计数均明显高于非频发组(9.7±3.41×109/L vs 8.5±3.36×109/L,P<0.05;10.2±3.18×109/L vs 8.5±3.36×109/L,P<0.05),同时频发组两次入院时CRP明显高于非频发组(68.21±7.38mg/L vs 48.23±5.16mg/L,P<0.05;70.77±7.63mg/L vs48.23±5.16mg/L,P<0.05),频发组两次入院时PCT明显高于非频发组(0.42±0.046 ng/m L vs 0.26±0.030ng/m L,P<0.05;0.48±0.054 ng/m L vs 0.26±0.030ng/m L,P<0.05)。两组在共患病种类上无明显区别,均主要为冠心病、高血压、糖尿病等疾病。结论频发急性加重的COPD患者CAT评分,肺功能较非频发型患者差,白细胞计数、CRP、PCT值高于非频发型组,共患病种类相近。展开更多
基金supported in part by U.S.Department of Agriculture(USDA)-Nation Research Initiative/National Institute of Food and Agriculture(NRI/NIFA)2008–35204-04660,2010–65205-20588 and 2011–67015-30183
文摘Background: Marek’s disease(MD) is a highly contagious pathogenic and oncogenic disease primarily affecting chickens. However, the mechanisms of genetic resistance for MD are complex and not fully understood. MD-resistant line 63and MD-susceptible line 72are two highly inbred progenitor lines of White Leghorn. Recombinant Congenic Strains(RCS) were developed from these two lines, which show varied susceptibility to MD.Results: We investigated genetic structure and genomic signatures across the genome, including the line 63and line72, six RCSs, and two reciprocally crossed flocks between the lines 63and 72(F1 63× 72and F1 72× 63) using Affymetrix~? Axiom~? HD 600 K genotyping array. We observed 18 chickens from RCS lines were specifically clustered into resistance sub-groups distributed around line 63. Additionally, homozygosity analysis was employed to explore potential genetic components related to MD resistance, while runs of homozygosity(ROH) are regions of the genome where the identical haplotypes are inherited from each parent. We found several genes including SIK, SOX1, LIG4, SIK1 and TNFSF13B were contained in ROH region identified in resistant group(line 63and RCS), and these genes have been reported that are contribute to immunology and survival. Based on FSTbased population differential analysis, we also identified important genes related to cell death and anti-apoptosis, including AKT1, API5, CDH13, CFDP and USP15,which could be involved in divergent selection during inbreeding process.Conclusions: Our findings offer valuable insights for understanding the genetic mechanism of resistance to MD and the identified genes could be considered as candidate biomarkers in further evaluation.
文摘The experiment was conducted to study the dynamic changes of immune responses of chicks immunized with March's disease(MD)trivalent vaccine and turkey herpesvirus(HVT)at one day age.Results were found that after immunization of chicks with MD vaccines,the intcrlcukinc-2(IL-2)inductive activity and IL-2 receptor expression of T cells from thymus and spleen significantly increased,suggesting that the immunoregulativc function was markedly enhanced in the immune organs;the number of antibody-producing cells,the number and proliferative function of T cells rose markedly in Bursa Fabricius,spleen and thymus,indicating that the cellular and humoral immune responses were elevated remarkablly in the central and peripheral immune organs;the number of T and antibody-producing cells as well as the content of IgG,IgA and IgM obviously mounted in cecal tonsil, Harder tan gland mucosal lymphoid tissues of bronchus along with tears,trachea washings, bile and intestinal fluids,demonstrating that the local and mucosal immunity was raised in the respiratory and digestive tract;the levels of immune responses mentioned above in the trivalent vaccine-immuniaed chicks were apparently higher than those of HVT-immunized birds.
文摘目的分析频发急性加重慢性阻塞性肺疾病(COPD)表型患者的临床特征。方法收集2016年01月至2017年01月在上海交通大学医学院附属新华医院崇明分院呼吸科住院被诊断为AECOPD患者136例,综合急性加重频率,将AECOPD患者分为频发急性加重型(57例),非频发急性加重型(79例)两组,对两组患者的基线资料、肺功能、炎症指标及共患病进行分析比较。结果 COPD评估测试(CAT评分)频发组患者两次入院前稳定期均明显高于非频发组(13.3±4.1 vs 11.4±2.7,P<0.01;13.1±4.3 vs 11.4±2.7,P<0.01);且频发组患者两次住院好转后肺功能检查,其中FEV1值均明显降低(0.85±0.34Lvs 1.00±0.39L,P<0.05;0.83±0.38Lvs 1.00±0.39L,P<0.05),肺功能处于III/IV级患者比例也明显高于非频发组(均P<0.05)。血气分析发现,与非频发组患者相比,频发组患者两次住院动脉血PH、Pa O2均明显降低,且PCO2均升高,差异均有统计学意义(均P<0.05)。频发组患者两次住院白细胞计数均明显高于非频发组(9.7±3.41×109/L vs 8.5±3.36×109/L,P<0.05;10.2±3.18×109/L vs 8.5±3.36×109/L,P<0.05),同时频发组两次入院时CRP明显高于非频发组(68.21±7.38mg/L vs 48.23±5.16mg/L,P<0.05;70.77±7.63mg/L vs48.23±5.16mg/L,P<0.05),频发组两次入院时PCT明显高于非频发组(0.42±0.046 ng/m L vs 0.26±0.030ng/m L,P<0.05;0.48±0.054 ng/m L vs 0.26±0.030ng/m L,P<0.05)。两组在共患病种类上无明显区别,均主要为冠心病、高血压、糖尿病等疾病。结论频发急性加重的COPD患者CAT评分,肺功能较非频发型患者差,白细胞计数、CRP、PCT值高于非频发型组,共患病种类相近。
