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1.
试验选用1日龄健康爱拔益加(AA)肉鸡和北京油鸡公雏各72只。检测新城疫抗体效价,牛血清白蛋白抗体水平,外周血T、B淋巴细胞转化率以及T淋巴细胞亚群等指标。结果表明:北京油鸡二免后第7天的新城疫抗体效价和二免后第6天的牛血清白蛋白抗体水平都比AA肉鸡的高,但均无显著性差异(P>0.05)。北京油鸡的脂多糖(LPS)刺激指数始终比AA肉鸡的高(P>0.05);21日龄时,北京油鸡的刀豆素(A ConA)刺激指数、CD4+、CD8+T淋巴细胞数量以及CD4+/CD8+都比AA肉鸡的高,但均无显著性差异(P>0.05);而42日龄时,AA肉鸡的ConA刺激指数、CD4+、CD8+T淋巴细胞数量以及CD4+/CD8+却高于北京油鸡(P<0.05)。本试验结果提示,AA肉鸡和北京油鸡的体液免疫和细胞免疫功能之间存在一定的差异,但差异不显著。 相似文献
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应用流式细胞仪检测缺乳仔鼠CD3+、CD4+和CD8+T淋巴细胞含量,研究添加不同剂量的板蓝根多糖(RIP)对缺乳仔鼠免疫器官及T淋巴细胞亚群的影响。结果表明,RIP可以提高缺乳仔鼠胸腺指数和脾脏指数,对胸腺指数和脾脏指数效果最佳的RIP剂量随日龄增大而减小;RIP可以增加缺乳仔鼠外周血CD3+、CD4+、CD8+T淋巴细胞数量,CD3+T淋巴细胞数量在7-28日龄时,A、C、D组与B组差异显著(P0.05);CD4+T淋巴细胞数量在7-21日龄时,A、C、D组与B组差异显著(P0.05);各处理组CD3+、CD4+、CD8+T淋巴细胞数量以及CD4+/CD8+比值随着日龄的增加有所下降。结果表明,一定剂量的RIP可以促进缺乳仔鼠免疫器官发育,提高T淋巴细胞亚群的水平。 相似文献
3.
H9亚型禽流感油乳剂灭活苗免疫产生期内T淋巴细胞表型亚类的检测与研究 总被引：2，自引：0，他引：2
采用免疫荧光法、使用流式细胞检测仪对经H9亚型禽流感病毒人工感染SPF鸡、H9亚型禽流感油乳剂灭活苗免疫SPF鸡以及经免疫后使用H9亚型禽流感病毒攻毒后的SPF鸡外周血、脾脏、胸腺中T细胞表型亚类(CD4+、CD8+、TCR1+)的变化规律进行了监测,结果表明,H9亚型禽流感油乳剂灭活苗免疫后抗原的缓慢释放可在一定程度上激发机体的细胞免疫应答,使免疫活性T淋巴细胞得到活化,免疫后鸡体外周血中CD4+、CD8+和TCR1+T细胞的数量呈现出一明显升高的过程;同时,人工感染免疫鸡后,脾脏和胸腺TCR1+T细胞的数量上升,外周血CD4+、CD8+和TCR1+T细胞的数量少量降低或维持不变,随后短期即恢复正常;而人工感染SPF对照鸡后,外周血CD4+、CD8+和TCR1+T细胞的数量呈现下降趋势. 相似文献
4.
《中国兽医杂志》2019,(4)
为了研究金银花复方制剂对人工感染NDV雏鸡免疫器官T淋巴细胞及其亚群以及B淋巴细胞的影响,本试验以21日龄雏鸡为研究对象,随机分成感染组、中药治疗组、空白组。中药治疗组饮水给予复方金银花制剂。应用流式细胞仪检测技术,细胞培养技术研究了金银花复方制剂对人工感染NDV雏鸡免疫器官(胸腺、脾脏、腔上囊)T淋巴细胞及其亚群以及B淋巴细胞的影响,旨在揭示金银花复方制剂对人工感染NDV雏鸡免疫器官细胞免疫和体液免疫功能的影响及其机理。研究结果发现,金银花复方制剂能够提高人工感染NDV雏鸡免疫器官胸腺及脾脏CD3~+、CD4~+T淋巴细胞百分率,使CD4~+/CD8~+T淋巴细胞值升高,提高免疫器官脾脏及腔上囊B淋巴细胞百分率,表明金银花复方制剂能够提高雏鸡的免疫功能。 相似文献
5.
试验应用流式细胞术检测缺乳仔鼠CD3+、CD4+和CD8+ T淋巴细胞含量来研究添加不同剂量的板蓝根多糖(RIP)对缺乳仔鼠免疫器官及T淋巴细胞亚群的影响。结果表明:①RIP可增加缺乳仔鼠胸腺指数和脾脏指数。对胸腺指数和脾脏指数效果最好的RIP剂量随日龄增大而减小。②RIP可以增加缺乳仔鼠外周血CD3+、 CD4+ 、CD8+ T淋巴细胞数量。7~28日龄时初乳组(A组)、缺乳+中RIP组(C组)和缺乳+高RIP组(D组)3组CD3+ T淋巴细胞含量与缺乳组(B组)相比差异显著(P<0.05)。7~21日龄时初乳组(A组)、缺乳+中RIP组(C组)和缺乳+高RIP组(D组)3组CD4+ T淋巴细胞含量与缺乳组(B组)相比差异显著(P<0.05)。各处理组CD3+、 CD4+、CD8+ T淋巴细胞含量及CD4+/CD8+比值随着日龄的增加有所下降。适宜剂量的RIP可促进缺乳仔鼠免疫器官发育,提高T淋巴细胞亚群的水平。 相似文献
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以SPF雏鸡为研究对象,应用细胞培养、MTT及流式细胞检测技术,通过T淋巴细胞对刀豆蛋白A的增殖能力及其CD4+和CD8+T淋巴细胞亚型数量的检测,较全面系统的研究了传染性法氏囊病病毒(IBDV)感染21日龄SPF雏鸡后,其免疫器官(胸腺、脾脏、法氏囊)T细胞增殖能力及其亚型的动态变化,结果发现:IBDV感染SPF雏鸡后,其胸腺和脾脏T淋巴细胞增殖能力于病毒感染后3～7 d显著降低,CD4+和CD8+T淋巴细胞数量于病毒感染初期明显低于对照雏鸡;法氏囊中CD4+和CD8+T淋巴细胞数量在病毒感染初期迅速增加,而后持续低于对照雏鸡.表明SPF雏鸡感染IBDV后,其免疫器官细胞免疫功能受抑制,而作为病毒侵袭的主要靶器官,法氏囊在病毒感染初期有大量T细胞浸润,该项研究为进一步阐明IBDV的免疫致病机制提供了重要的参考依据. 相似文献
7.
将14日龄雏鸡随机分为3组,A组灌服1 mL的紫锥萄、黄芪合荆,B、C组灌服生理盐水,连续灌服7 d.21日龄时A、B组雏鸡接种传染性法氏囊病病毒(IBDV),用免疫组化法观察雏鸡胸腺、小肠中CD4+、CD8+T淋巴细胞动态分布的变化.结果表明,用药组和攻毒对照组相比较,CD4+T淋巴细胞差异显著(P<0.05),但是CD8+T淋巴细胞差异不显著(P>0.05),与空白对照组相比CD4+淋巴细胞显著增多.胸腺、小肠中24日龄时CD4+、CD8+T细胞数量较其他日龄差异显著(P<0.05).总试验期胸腺中CD4+、CD8+含量是所测总数的60%.表明紫锥菊、黄芪对机体免疫有显著增强作用,以胸腺中CD4+、CD8+含量多于小肠,能显著降低IBDV对机体造成的损伤. 相似文献
8.
雏鸡淋巴细胞变化规律的流式细胞仪检测研究 总被引：10，自引：0，他引：10
为进一步研究鸡在出孵1个月左右时间内T、B淋巴细胞及其亚群的发育状况，将SPF雏鸡分别在3、5、7、9、11、14、17、22、27、32日龄时取血液、脾脏、法氏囊及胸腺，分离并制成淋巴细胞悬液，流式细胞仪双染色法检测Bu-la^＋B淋巴细胞、CD3^＋、CD4^＋、CD8^＋和TCRγδ^＋CD3^＋T淋巴细胞含量及血液淋巴细胞的凋亡规律。结果：在出孵1个月内T、B细胞处于分化发育阶段的初期，除胸腺外，呈上升趋势，但T细胞亚群的变化无规律，B细胞在法氏囊中和T细胞在脾脏中3～9日龄发育最快；血液淋巴细胞凋亡趋于下降，尤其是在9日龄以后：此间不断有成熟的淋巴细胞产生，不断进入血液和脾脏，使其数量有上升趋势。但是，血液中第7日龄时Bu—la^＋B淋巴细胞和CD3^＋、CD4^＋、CD8^＋T淋巴细胞数量均最低，说明体液免疫和细胞免疫水平第7日龄时都最低，并在17日龄时进入水平较高的又一个低谷。TCRγδ^＋CD3^＋T细胞则变化幅度不大。 相似文献
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10.
为了研究桦木酸对小鼠淋巴细胞和巨噬细胞的影响.从白桦树皮中提取桦木醇,经琼斯试剂氧化制备中间产物桦木酮酸后,用硼氢化钠还原合成桦木酸;取6周龄KM小鼠168只,随机分为4组,按0、0.25、0.5和1 mg·kg-1体质量连续灌胃14 d,检测桦木酸对淋巴细胞的增殖,脾和胸腺淋巴细胞亚群以及脾淋巴细胞的溶血空斑数和巨噬细胞的吞噬能力的影响.结果表明,桦木酸能提高小鼠的免疫器官指数,协同促进ConA或LPS诱导的小鼠脾脏T淋巴细胞或B淋巴细胞的增殖活性,提高胸腺淋巴细胞CD4+百分率,脾淋巴细胞的CD19+百分率以及CD4+/CD8+的百分比;桦木酸增加SRBC免疫小鼠溶血空斑数,还能显著增强腹腔巨噬细胞吞噬中性红的能力.结果提示,桦木酸具有一定的免疫调节作用,对小鼠的细胞免疫、体液免疫功能和非特异免疫有明显的增强作用. 相似文献
11.
The 43 monoclonal antibody raised against feline T cells was found to react with a single-chain glycoprotein of Mr 72,000 that is present on most thymocytes, 60% of lymph node cells, 20% of splenocytes, and 45% of blood mononuclear cells. All CD4+ and CD8+ T cells were found to express the 43-reactive determinant, as did a small subpopulation of CD4-/CD8-/IgM- lymphocytes in the periphery. The 43-reactive determinant was not detected on B cells, macrophages, or other types of blood cells. The 43 antigen was phosphorylated in resting and activated T cells. Its expression was upregulated by stimulation with phorbol myristate acetate and with phytohemagglutinin. When added to concanavalin A-stimulated T-cell cultures in low concentrations, the 43 antibody was found to augment mitogenesis. The data indicate that this antibody may identify a CD5 homologue on feline T cells. 相似文献
12.
Available data on the normal levels of white blood cell populations in healthy rhesus macaques (Macaca mulatta) originated and living in China is scanty. To obtain such data, blood samples from 150 Chinese rhesus macaques were collected and the normal range of white blood cells and their subsets were analyzed according to age and sex by flow cytometry. CBC data showed that the count of total white blood cells and lymphocytes decreased with age. Phenotypic analysis of CD4 and CD8 expression on CD3+ T lymphocytes showed that the percentage of CD4+ T cells (51.4+/-9.6%), CD4-CD8- T cells (8.5+/-4.1%) and the ratio of CD4+ T to CD8+ T cells (1.26+/-0.55) decreased with age; and the percentage of CD8+ T cells (42.0+/-9.7%), CD4+CD8+ T cells (1.3+/-0.9%) and CD3+ lymphocytes (55.3+/-13.3%) increased with age. However, no statistically significant difference was observed between the male and female groups in most parameters in these monkeys except for the percentage of CD4+CD8+ T cells. This study provided basic information about blood cell count and T lymphocyte subsets in Chinese rhesus macaques. It may be useful for comparative studies using Indian and Chinese rhesus macaques. 相似文献
13.
试验旨在明确T淋巴细胞在中国恒河猴各组织中的表型与分布,为疾病模型研究提供基础数据。取外周血、腹股沟淋巴结、肠系膜淋巴结及肠道组织,从中分离出淋巴细胞。使用流式细胞术检测分析各种表型的淋巴细胞在组织间的分布。结果表明,淋巴结中CD4+ /CD8+ T细胞比值高于外周血,肠道固有层中最低,三者差异显著。记忆性T细胞在外周血和肠道固有层T细胞中比重较大,而淋巴结中主要为幼稚T细胞。CD4+ T细胞中中心记忆T细胞Tcm为主要亚群,而CD8+ T细胞主要为效应记忆细胞Tem。外周血与肠道固有层中增殖T细胞比例相当,而淋巴结中T细胞增殖水平相对较低。各组织中CXCR4受体表达量普遍高于CCR5受体,其中肠道固有层CCR5受体表达水平最高。值得注意的是,有一小群表型CD3+ CD4+ CD8low的细胞仅在肠道固有层中存在,经分析其功能活性应高于肠道CD4单阳性T细胞。因此,测定了健康中国恒河猴各表型T淋巴细胞在多种淋巴组织中的基础数值,为相关模型研究奠定基础。 相似文献
14.
为进一步明确柔嫩艾美耳球虫对球虫易感性差异鸡种的致病性,本研究以1×105个柔嫩艾美耳球虫孢子化卵囊的剂量分别感染对球虫具有抗性的藏鸡和易感的隐性白羽鸡,接种后观察记录各组鸡的临床表征、血便记分、死亡率、增重、盲肠病变记分、卵囊产量,并于感染前和感染后3、6和8 d每个品种分别随机选择5只鸡采集抗凝血,应用流式细胞仪（FCAS）检测外周血CD4+T和CD8+T淋巴细胞亚群数量。结果显示,柔嫩艾美耳球虫感染后藏鸡相对增重率高于隐性白羽鸡,死亡率、血便记分和盲肠病变记分均低于隐性白羽鸡,但卵囊产量高于隐性白羽鸡。外周血T淋巴细胞亚群变化方面,感染前,藏鸡CD4+T淋巴细胞数及CD4+/CD8+比值均高于隐性白羽鸡。感染后第3天,藏鸡CD4+、CD8+ T淋巴细胞数及CD4+/CD8+比值下降,隐性白羽鸡CD8+ T淋巴细胞数略有下降,CD4+T淋巴细胞数及CD4+/CD8+比值上升,但CD4+/CD8+比值仍显著低于藏鸡（P<0.05）。感染后第6天,2个品种鸡CD4+ T淋巴细胞数及CD4+/CD8+比值均下降,其中藏鸡表现为显著下降（P<0.05）,而隐性白羽鸡仅CD4+/CD8+比值显著降低（P<0.05）,隐性白羽鸡CD8+ T淋巴细胞数显著升高（P<0.05）。感染后第8天,2个品种鸡CD4+/CD8+比值显著下降（P<0.05）,藏鸡CD8+ T淋巴细胞数显著高于隐性白羽鸡（P<0.05）,但CD4+/CD8+比值显著低于隐性白羽鸡（P<0.05）。结果表明,球虫对藏鸡和隐性白羽鸡的致病性存在差异,这种差异与T淋巴细胞介导的免疫应答反应密切相关。 相似文献
15.
The aim of this study was to investigate the immune state of chicken lung in different periods.With lung tissue of Hy-line White chicken at different ages,the distribution and quantity changes of CD4+ and CD8+T lymphocytes in lung were studied using immunohistochemistry staining.The results showed that CD8+T lymphocytes appeared firstly in embryonic at 18 d,while CD4+T lymphocytes appeared at 1-day-old chicken.At 4-day-old,there were aggregates of lymphocytes at the junction of the primary and secondary bronchi,which formed obvious broncho-associated lymphoid tissue (BALT).CD4+T lymphocytes of each age mainly occupied the central area of BALT,while CD8+T lymphocytes mainly surrounded the periphery.Since 56 days old,CD8+T lymphocytes are distributed in the inner wall of third-order bronchial airway,atrial septum,gas exchange area and interlobular connective tissue,and are distributed throughout the lung.In terms of quantity change,with the growth of daily age,the number of CD4+T lymphocytes and CD8+T lymphocytes gradually increased,and the number of CD4+ T lymphocytes was more than that of CD8+ T lymphocytes before 35 days of age,while the number of CD8+ T lymphocytes was significantly more than that of CD4+ T lymphocytes at the same age thereafter.The results showed that the distribution and number of CD4+ and CD8+T lymphocytes in the lungs of chickens were correlated with the age,and the changes could reflect that the lungs before the age of 35 days were dominated by humoral immunity,while the lungs after that tended to be cellular immunity. 相似文献
16.
旨在系统分析伯氏疟原虫感染引起宿主T细胞、NK细胞、Tim-3表达及细胞因子的变化。选取64只雌性C57BL/6小鼠随机分为8组,每组8只,分别于感染后0、4、7、9、11、13、16和19 d获取小鼠脾及外周血免疫细胞,利用流式细胞术检测小鼠主要免疫细胞亚群及免疫检查点分子Tim-3表达水平的变化;同时检测血清中细胞因子的变化。结果表明,感染疟原虫后,小鼠脾CD3+CD4+ T细胞、CD3+CD8+ T细胞及NK细胞的比例均逐渐降低（P<0.01）,且伴随着3种细胞Tim-3表达量的升高（P<0.01）。小鼠外周血CD3+CD4+ T细胞的比例呈先降低后升高趋势,CD3+CD8+ T细胞的比例呈先升高后降低趋势（P<0.05）;小鼠外周血CD3-NK1.1+细胞的比例呈先降低后升高趋势,但感染末期,其比例仍低于未感染组（P<0.05）。Tim-3分子在外周血CD3+CD4+ T细胞、CD3+CD8+ T细胞及CD3-NK1.1+细胞的表达均显著升高（P<0.05）。感染疟原虫后,小鼠血清中促炎细胞因子IL-2的分泌量均显著高于未感染组（P<0.05）;促炎细胞因子IFN-γ、TNF-α和IL-6在血清中分泌均呈先升高后降低趋势（P<0.05）;具有免疫抑制作用的细胞因子IL-10呈逐渐升高趋势,且感染后期急剧升高（P<0.001）。以上结果表明,感染疟原虫后,小鼠的特异性免疫反应发挥了一定的杀伤作用,但由于Tim-3免疫检查点分子及一些发挥免疫抑制作用的细胞因子（IL-10）的过度表达,有利于疟原虫逃避宿主的免疫捕杀作用。该研究提示了从宿主免疫抑制角度研究疟原虫感染的重要性。 相似文献
17.
The aim of this study was to investigate changes in selected parameters of cellular immune response in the conditions of endotoxin fever and pyrogenic tolerance in pigeons. On the first day of observation the experimental birds (n = 18) were intravenously injected with Escherichia coli LPS at a dose of 10 microg/kg b.w., while the control animals (n = 6) received apyrogenic physiological saline also in the form of injection. On the second and the third day of the experiment LPS was injected additionally at 24 h intervals. Four and a half hours after the saline and pyrogen administration blood samples were collected from the control and experimental pigeons. The following immunological assays were performed: WBC, leucogram and immunophenotyping of lymphocyte subsets in peripheral blood, i.e. CD 3+ (T lymphocytes), CD 4+ (T helper lymphocytes) and CD 8+ (T suppressor/cytotoxic lymphocytes) cells. In the conditions of endotoxin fever (i.e. after the first LPS injection) leucopenia, monocytopenia, heterophilia and eosinophilia were observed. Additionally, the immunophenotyping of peripheral blood lymphocytes indicated an increase in percentage of CD 3+, CD 4+ and CD 8+ cells in response to the single injection of LPS. In contrast, the consecutive injections of LPS, which created a pyrogenic tolerance effect, caused a decrease in WBC value, heteropenia, eosinopenia and lymphocytosis. Moreover, during this state an increase in percentage of CD 3+ and CD 8+ cells was demonstrated in contrast to the percentage of CD 4+ lymphocytes. The general tendencies in cellular immune response of the affected pigeons in the conditions of endotoxin fever and pyrogenic tolerance aim at activation of defence mechanisms against LPS for its prompt elimination from the animal's organism. 相似文献
18.
Otani I Ohta K Ishikawa A Yamada T Ishinazaka T Ohtaki T Tsumagari S Kanayama K 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2008,70(3):285-287
Lymphocyte subsets in canine umbilical cord blood were flow cytometrically analyzed and compared with those of the dams' peripheral blood. The proportion of CD3+ T lymphocytes, CD21+CD3- B lymphocytes, and CD3-CD21- non-T non-B lymphocytes in umbilical cord blood was 52.9%, 30.4%, and 16.7%, respectively. T lymphocyte/B lymphocyte ratio was significantly lower in the umbilical cord blood than in the dams' peripheral blood (2.1 +/- 1.4 versus 11.0 +/- 8.1, P < 0.001). In contrast, CD4+ lymphocyte/CD8+ lymphocyte ratio was significantly higher in the umbilical cord blood than in the dams' peripheral blood (7.6 +/- 2.2 versus 1.8 +/- 0.6, P<0.001). These findings clarified the phenotypic characters of canine umbilical cord blood lymphocytes. 相似文献
19.
A Villaescusa M García-Sancho F Rodríguez-Franco A Sainz 《Veterinary immunology and immunopathology》2012,149(1-2):126-131
A longitudinal study of peripheral blood lymphocyte subsets from 7 to 15 months of age was performed in Beagle dogs employing a multiparametric flow cytometry. The data were compared with data obtained from adult Beagle dogs that were housed in the same animal facilities and that were subjected to the same controls during the 34 weeks of the study. Absolute counts of total lymphocytes and CD3+ T, CD3+CD4+ Th and CD21+ B lymphocytes decreased during the entire 34 weeks period of the study in the young dogs group. The same was observed with regard to the percentage of CD3+CD4+ Th lymphocytes and the CD4/CD8 ratio, while the percentage of CD3+CD8+ Tc lymphocytes increased from 7 to 15 months of age. These age-related changes found in lymphocyte subsets distribution of young dogs led to level the absolute and relative values of adult dog lymphocytes. The observations of this longitudinal study illustrate the changes related to maturation of lymphocyte subsets that occur during early life in Beagle dogs. 相似文献