To observe the surface microstructure features by using scanning electron microscope,and study the surface antigen on lymphocytes of Paralichthys oliveaceus by form rosette with sheep red bloods cells and the cross-re...To observe the surface microstructure features by using scanning electron microscope,and study the surface antigen on lymphocytes of Paralichthys oliveaceus by form rosette with sheep red bloods cells and the cross-reactivity by using monoclonal antibody against human CD.Under scanning microscope ,there are two kinds of lymphocytes,type I lymphocytes is characterized with being full of bumpiness and holes, the surface of type II lymphocytes is rather smooth with tiny finger like tubercle. The rosette formation of lymphocytes with sheep red blood cells is obvious however the rosette forming percents of lymphocytes is rather low,lower than 2%. The cross reactivity of lymphocytes with monoclonal antibody against human CD showed that there are 5.25%+0.38% of NK cells in peripherial lymphocytes of Paralichthys oliveaceus,and the CD25^+ percentage of lymphocytes is 5.25%+0.38%.No cross-reactivity with T-cell antigen,B-cell antigen and other activity antigen is found on the lymphocytes surface of Paralichthys oliveaceus.展开更多
目的比较两种免疫程序和途径制备抗血清的效价,并在免疫学溶血反应中的运用效果比较,寻求获取符合实验教学需要的高效价溶血素的较佳方法。方法采用不同浓度的绵羊红细胞(Sheep red blood cells,SRBC)间隔1天和间隔3天腹腔、耳静脉免疫...目的比较两种免疫程序和途径制备抗血清的效价,并在免疫学溶血反应中的运用效果比较,寻求获取符合实验教学需要的高效价溶血素的较佳方法。方法采用不同浓度的绵羊红细胞(Sheep red blood cells,SRBC)间隔1天和间隔3天腹腔、耳静脉免疫家兔,用血球凝集法浓度为1.5%SRBC悬液检测并比较两种免疫程序和途径所制备溶血素的效价结果免疫后获得的溶血素效价几何平均滴度,A组脱纤维绵羊RBC全血皮内多点注射家兔为1:22286.09,B组10%脱纤维绵羊RBC悬液耳静脉注射家兔为1:72407.73。结论 10%脱纤维SRBC悬液耳静脉注射家兔制备的溶血素效价高于脱纤维SRBC全血皮内多点免疫家兔,是获取实验教学用溶血素的较佳免疫程序。展开更多
为筛选太行鸡脾脏组织中绵羊红细胞(sheep red blood cell,SRBC)免疫应答的关键基因和信号通路,本研究采用高通量测序技术,构建了太行鸡SRBC免疫组和对照组脾脏组织的数字基因表达谱,对差异表达的基因进行筛选与注释、GO分析和通路的功...为筛选太行鸡脾脏组织中绵羊红细胞(sheep red blood cell,SRBC)免疫应答的关键基因和信号通路,本研究采用高通量测序技术,构建了太行鸡SRBC免疫组和对照组脾脏组织的数字基因表达谱,对差异表达的基因进行筛选与注释、GO分析和通路的功能显著性富集以及差异基因编码蛋白的互作网络分析。结果表明:太行鸡在免疫6 d后的SRBC抗体滴度平均值为7.653;与对照组相比,差异倍数在2倍以上的共有1 108个基因,其中496个上调表达,612个下调表达,412个上调基因只在免疫组表达,537个下调基因仅在对照组表达;上调基因主要涉及T细胞激活、淋巴细胞增殖和单核细胞增殖等生物学过程,下调基因主要参与免疫效应、防御效应、炎性效应、先天性免疫效应生物学过程;在分子注释系统数据库中注释到的免疫相关的显著调控通路有12条,包括抗原的加工递呈、Toll样受体信号通路、沙门氏菌感染、HTLV-Ⅰ感染和单纯疱疹病毒感染等;56个差异基因编码的蛋白产物存在相互作用,其中16个基因位于网络中心节点,部分差异基因与SRBC相关QTL重叠。初步认为抗原加工与递呈的MHCⅡ类分子途径、T细胞激活等调控通路及RAG2、FOS、MHC B-LBⅢ、HSP90AA1、CXCR4和HSPA8等基因可能是参与调控太行鸡SRBC免疫应答的重要信号通路和基因,但其功能和影响还有待于深入研究。展开更多
An economically-important trait in poultry for which gene identification <span style="font-family:Verdana;">continues to be a challenge is immune response. The objective of the study </span><s...An economically-important trait in poultry for which gene identification <span style="font-family:Verdana;">continues to be a challenge is immune response. The objective of the study </span><span style="font-family:Verdana;">was</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">to quantitate the expression of major histocompatibility complex (MHC) class II <i></i></span><i><i><span style="font-family:Verdana;">BLB2</span></i><span style="font-family:Verdana;"></span></i> gene at cytolytic and latent immune response stages in Nigerian indigenous chickens. </span><span style="font-family:Verdana;">A total of 108 Nigerian indigenous chickens (NIC) were sourced across the South-western states in Nigeria. The birds were inoculated with sheep red blood cells (SRBC), after which blood samples were obtained (5 days post-inoculation) and antibody haemagglutination test was carried out to place the birds into groups of high and low antibody titre levels.</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">The categorisation of the birds resulted in six groups of normal feather high, normal feather low, naked neck high, naked neck low, frizzle feather high and frizzle feather low antibody groups. </span><span style="font-family:Verdana;">A total of 48 chicks w</span></span><span style="font-family:Verdana;">ere</span><span style="font-family:Verdana;"> selected from the progeny for gene expression studies. </span><span style="font-family:Verdana;">Surgical excision of thymus and spleen was carried out for the detection of cytolytic and latent responses of the birds. β-actin was used as the endogenous control and the critical threshold method</span><span> </span><span style="font-family:Verdana;">(2<span style="white-space:nowrap;"><sup></sup></span><sup></sup></span><span style="font-family:;" "=""><span style="font-family:Verdana;"><sup>–ΔΔCт</sup><span style="white-space:nowrap;"></span>) was carried out for the determination of fold change. The fold change of spleen tissue expression at cytolytic immune response of the birds was 30,362.44 compared to latent response 294.07;and the fold change of thymus expression at cytolytic immune response of the birds was 51.98 compared to latent response 5.24</span><i><span style="font-family:Verdana;">. </span></i><span style="font-family:Verdana;">At both cytolytic and latent stages of immune response to SRBC antigen, <i></i></span><i><i><span style="font-family:Verdana;">BLB2</span></i><span style="font-family:Verdana;"></span></i> expression in the spleen was comparatively higher than in the thymus and the height of transcriptional activity was associated with the cytolytic stage</span><i><span style="font-family:Verdana;">. </span></i><span style="font-family:Verdana;">The birds of high titre at both the cytolytic and the latent responses had higher mRNA expression.</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">This study concluded that <i></i></span><i><i><span style="font-family:Verdana;">BLB2</span></i><span style="font-family:Verdana;"></span></i> gene expression in the Nigerian indigenous chicken was induced at the cytolytic stage and repressed at the latent stage. During avian infections, the category of high immune response birds would perform better than the low immune response counterpart;and the protective response that <i></i></span><i><i><span style="font-family:Verdana;">BLB2</span></i><span style="font-family:Verdana;"></span></i> gene <span style="font-family:Verdana;">offers </span><span style="font-family:Verdana;">will be repressed from one time point to the other.</span>展开更多
An inexpensive and rapid test for determining titers of Human Immunodeficiency Virus (HIV) in plasmas was developed. Washed sheep red blood cells were applied onto HIV positive plasmas, in V-bottomed microtiter plates...An inexpensive and rapid test for determining titers of Human Immunodeficiency Virus (HIV) in plasmas was developed. Washed sheep red blood cells were applied onto HIV positive plasmas, in V-bottomed microtiter plates, to complement the HIV antigens and antibodies present in plasmas. The setup was incubated for 30 minutes at 37℃. Reciprocal of the highest dilution of each plasma which gave passive agglutination of the RBCs was read as its HIV titer. Mean HIV load of five samples, was ≥ 4096.00 ± 0.00 after one day of storage at 4℃ but it reduced to 256.00 ± 70.10, 28.80 ± 3.20, 7.20 ± 0.80 and 1.60 ± 0.98 on days 2, 3, 4 and 7, respectively. HIV antibodies were still detectable, by ELISA, in plasma dilutions that were tested negative with the new test. It was concluded that when HIV antibodies have been confirmed, or added to plasmas, passive hemagglutination test can be applied to assess their viral loads.展开更多
文摘To observe the surface microstructure features by using scanning electron microscope,and study the surface antigen on lymphocytes of Paralichthys oliveaceus by form rosette with sheep red bloods cells and the cross-reactivity by using monoclonal antibody against human CD.Under scanning microscope ,there are two kinds of lymphocytes,type I lymphocytes is characterized with being full of bumpiness and holes, the surface of type II lymphocytes is rather smooth with tiny finger like tubercle. The rosette formation of lymphocytes with sheep red blood cells is obvious however the rosette forming percents of lymphocytes is rather low,lower than 2%. The cross reactivity of lymphocytes with monoclonal antibody against human CD showed that there are 5.25%+0.38% of NK cells in peripherial lymphocytes of Paralichthys oliveaceus,and the CD25^+ percentage of lymphocytes is 5.25%+0.38%.No cross-reactivity with T-cell antigen,B-cell antigen and other activity antigen is found on the lymphocytes surface of Paralichthys oliveaceus.
文摘目的比较两种免疫程序和途径制备抗血清的效价,并在免疫学溶血反应中的运用效果比较,寻求获取符合实验教学需要的高效价溶血素的较佳方法。方法采用不同浓度的绵羊红细胞(Sheep red blood cells,SRBC)间隔1天和间隔3天腹腔、耳静脉免疫家兔,用血球凝集法浓度为1.5%SRBC悬液检测并比较两种免疫程序和途径所制备溶血素的效价结果免疫后获得的溶血素效价几何平均滴度,A组脱纤维绵羊RBC全血皮内多点注射家兔为1:22286.09,B组10%脱纤维绵羊RBC悬液耳静脉注射家兔为1:72407.73。结论 10%脱纤维SRBC悬液耳静脉注射家兔制备的溶血素效价高于脱纤维SRBC全血皮内多点免疫家兔,是获取实验教学用溶血素的较佳免疫程序。
文摘An economically-important trait in poultry for which gene identification <span style="font-family:Verdana;">continues to be a challenge is immune response. The objective of the study </span><span style="font-family:Verdana;">was</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">to quantitate the expression of major histocompatibility complex (MHC) class II <i></i></span><i><i><span style="font-family:Verdana;">BLB2</span></i><span style="font-family:Verdana;"></span></i> gene at cytolytic and latent immune response stages in Nigerian indigenous chickens. </span><span style="font-family:Verdana;">A total of 108 Nigerian indigenous chickens (NIC) were sourced across the South-western states in Nigeria. The birds were inoculated with sheep red blood cells (SRBC), after which blood samples were obtained (5 days post-inoculation) and antibody haemagglutination test was carried out to place the birds into groups of high and low antibody titre levels.</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">The categorisation of the birds resulted in six groups of normal feather high, normal feather low, naked neck high, naked neck low, frizzle feather high and frizzle feather low antibody groups. </span><span style="font-family:Verdana;">A total of 48 chicks w</span></span><span style="font-family:Verdana;">ere</span><span style="font-family:Verdana;"> selected from the progeny for gene expression studies. </span><span style="font-family:Verdana;">Surgical excision of thymus and spleen was carried out for the detection of cytolytic and latent responses of the birds. β-actin was used as the endogenous control and the critical threshold method</span><span> </span><span style="font-family:Verdana;">(2<span style="white-space:nowrap;"><sup></sup></span><sup></sup></span><span style="font-family:;" "=""><span style="font-family:Verdana;"><sup>–ΔΔCт</sup><span style="white-space:nowrap;"></span>) was carried out for the determination of fold change. The fold change of spleen tissue expression at cytolytic immune response of the birds was 30,362.44 compared to latent response 294.07;and the fold change of thymus expression at cytolytic immune response of the birds was 51.98 compared to latent response 5.24</span><i><span style="font-family:Verdana;">. </span></i><span style="font-family:Verdana;">At both cytolytic and latent stages of immune response to SRBC antigen, <i></i></span><i><i><span style="font-family:Verdana;">BLB2</span></i><span style="font-family:Verdana;"></span></i> expression in the spleen was comparatively higher than in the thymus and the height of transcriptional activity was associated with the cytolytic stage</span><i><span style="font-family:Verdana;">. </span></i><span style="font-family:Verdana;">The birds of high titre at both the cytolytic and the latent responses had higher mRNA expression.</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">This study concluded that <i></i></span><i><i><span style="font-family:Verdana;">BLB2</span></i><span style="font-family:Verdana;"></span></i> gene expression in the Nigerian indigenous chicken was induced at the cytolytic stage and repressed at the latent stage. During avian infections, the category of high immune response birds would perform better than the low immune response counterpart;and the protective response that <i></i></span><i><i><span style="font-family:Verdana;">BLB2</span></i><span style="font-family:Verdana;"></span></i> gene <span style="font-family:Verdana;">offers </span><span style="font-family:Verdana;">will be repressed from one time point to the other.</span>
文摘An inexpensive and rapid test for determining titers of Human Immunodeficiency Virus (HIV) in plasmas was developed. Washed sheep red blood cells were applied onto HIV positive plasmas, in V-bottomed microtiter plates, to complement the HIV antigens and antibodies present in plasmas. The setup was incubated for 30 minutes at 37℃. Reciprocal of the highest dilution of each plasma which gave passive agglutination of the RBCs was read as its HIV titer. Mean HIV load of five samples, was ≥ 4096.00 ± 0.00 after one day of storage at 4℃ but it reduced to 256.00 ± 70.10, 28.80 ± 3.20, 7.20 ± 0.80 and 1.60 ± 0.98 on days 2, 3, 4 and 7, respectively. HIV antibodies were still detectable, by ELISA, in plasma dilutions that were tested negative with the new test. It was concluded that when HIV antibodies have been confirmed, or added to plasmas, passive hemagglutination test can be applied to assess their viral loads.