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将含萧山鸡白细胞介素2基因的真核表达质粒pCI-IL-2的减毒鼠伤寒沙门氏茵ZJ111(ZJ111/pCI-IL-2)口服接种小鼠和雏鸡,并与传染性法氏囊病病毒(IBDV)DNA疫苗联合免疫雏鸡观察其免疫效力.结果表明:利用减毒沙门氏菌作为栽体的鸡白细胞介素2口服免疫增强剂具有相对的安全性,重组ZJ111/pCI-IL-2茵能明显增强IBDV DNA疫苗对强毒株攻击保护率;增强IBDV DNA疫苗诱导的抗体的效价(P<0.05);增强IBDV DNA疫苗所诱导的T淋巴细胞和B淋巴细胞的增殖反应(P<0.05),上述结果初步表明以减毒沙门氏菌为载体的白细胞介素2免疫增强剂具有良好的安全性和免疫增强作用,为研制低成本、实用化的禽类口服免疫增强剂奠定了基础. 相似文献
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为了观察芦荟多糖( Aloe polysaccharide,AP)对黄羽肉鸡免疫器官发育和新城疫(Newcastle disease,ND)疫苗免疫效果的改善和增强作用,在接种ND疫苗的同时颈部皮下注射AP溶液(AP实际注射剂量分别为每次3.75,7.50,11.25,15.00,0 mg·只-1),就AP不同质量浓度... 相似文献
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HUANG Jun SHI Jin-gu CHEN Ming HUANG Yan-hua WEN Hua-cheng PENG Min-yi WANG Rui LIANG Wan-wen 《广西农业科学》2012,43(6)
免疫佐剂是一种先于或与抗原同时使用,能够增强机体的非特异性免疫能力及相应抗原的免疫原性,但其本身不具备抗原特性的物质.文章对鱼用口服疫苗免疫佐剂的作用机理以及霍乱毒素(CT)、大肠杆菌不耐热肠毒素(LT)、细胞因子等几种主要鱼用口服疫苗免疫佐剂的应用情况进行综述,发现鱼用口服疫苗免疫佐剂的研究应用过程中仍存在作用机理研究相对滞后、忽略肠道黏膜免疫机理特殊性、使用成本过高、安全性等问题,建议今后加强对鱼类肠道黏膜免疫机理以及口服疫苗免疫佐剂作用机理的研究,优化口服疫苗免疫佐剂的免疫剂量和程序,降低生产成本,研发出更为广泛、廉价的口服疫苗免疫佐剂,提高其安全性等,以促进水产养殖业的健康发展. 相似文献
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免疫佐剂是一种先于或与抗原同时使用,能够增强机体的非特异性免疫能力及相应抗原的免疫原性,但其本身不具备抗原特性的物质.文章对鱼用口服疫苗免疫佐剂的作用机理以及霍乱毒素(CT)、大肠杆菌不耐热肠毒素(LT)、细胞因子等几种主要鱼用口服疫苗免疫佐剂的应用情况进行综述,发现鱼用口服疫苗免疫佐剂的研究应用过程中仍存在作用机理研究相对滞后、忽略肠道黏膜免疫机理特殊性、使用成本过高、安全性等问题,建议今后加强对鱼类肠道黏膜免疫机理以及口服疫苗免疫佐剂作用机理的研究,优化口服疫苗免疫佐剂的免疫剂量和程序,降低生产成本,研发出更为广泛、廉价的口服疫苗免疫佐剂,提高其安全性等,以促进水产养殖业的健康发展. 相似文献
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试验观察基因工程乙肝疫苗对亚洲象的免疫应答作用。通过近四年的临床观察监测,该头象免疫接种后3个月即产生了HbsAb,说明该疫苗可用于免疫亚洲象。 相似文献
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鸽新城疫油佐剂灭活苗的研制与应用 总被引:5,自引:0,他引:5
利用当地分离的鸽新城疫病毒研制出鸽新城疫油佐剂灭活苗,疫苗接种试验鸽无不良反应,实验室小批试验免疫后20 d抗体水平达到高峰,强毒攻击的保护率为100;,抗体水平在5 log2以上可维持120 d以上,表明初步研制的鸽新城疫病毒油佐剂灭活苗可使鸽产生较高水平的抗体,有较长的免疫持续期.为保证疫苗免疫持续期达到6个月以上和油佐剂灭活苗的稳定性,工厂化生产中增加了疫苗中的抗原含量,同时改进了制苗工艺.35日龄的童鸽,按照传统习惯在断乳后仅免疫一次,鸽群免疫后180 d抗体水平仍然在7 log2以上.大量的田间试用,效果理想,对鸽新城疫的防制起到了免疫预防的作用. 相似文献
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目的观察加用含镁极化液治疗脑卒中后癫痫的疗效和对神经元保护的作用。方法120例脑卒中后癫痫患者随机分为治疗组和对照组(各60例)。对照组按脑卒中治疗原则及抗痫治疗,治疗组在常规治疗的基础上加用含镁极化液。结果治疗组癫痫临床治愈、有效和无效的例数分别为34、24、2,对照组为32、23、5,治疗组优于对照组(Hc=4.463,P<0.05)。治疗组神经功能缺损痊愈、显著进步、进步、无变化和恶化的例数分别为8、35、8、3、6;对照组为3、24、12、13、8,治疗组优于对照组(Hc=8.759,P<0.01)。治疗后治疗组总智商评分较治疗前低,差异有统计学意义(P<0.05);治疗后对照组总智商、数字广度、词汇、言语智商评分低于治疗前,差异有统计学意义(P<0.05)。治疗后治疗组总智商、数字广度、词汇、言语智商评分高于对照组,差异有统计学意义(P<0.01或0.05)。结论在常规治疗基础上加用含镁离子极化液可提高脑卒中后癫痫患者的癫痫控制率,同时具有神经元保护作用,减少神经功能缺损,能提高患者的认知功能。 相似文献
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《农业科学与工程前沿(英文版)》2015,(1)
The Neospora caninum immune mapped protein 1(Nc IMP1) was identified as a membrane protein,and a previous study indicated that Nc IMP1 could be a promising vaccine candidate against neosporosis. In this study, the immune response and protection efficacy of Nc IMP1 were evaluated. The coding sequence of Nc IMP1 was inserted into the eukaryotic expression vector pc DNA3.1(+), resulting in the recombination plasmid pc DNAIMP1, which was used for the intramuscular immunization of BALB/c mice. After immunization, the immune response was evaluated using a lymphoproliferative assay and cytokine and antibody measurements. Quantification of the cerebral parasite burden of mice challenged with 2106 N. caninum was performed 14 days after the last immunization. The results showed that the mice immunized with pc DNA-IMP1 developed a high level of specific antibody responses against recombinant Nc IMP1,with a mixed Ig G1/Ig G2 a response and a predominance of Ig G2 a production. The cellular immune response was associated with the production of IFN-γ, IL-2, IL-4 and IL-10 cytokines. The experiment was terminated 30 days p.i.,and the cerebral parasite burden in each mouse was assessed by quantitative PCR. The parasite burden was significantly reduced in the pc DNA-IMP1-vaccinated mice. These data suggest that IMP1 is a promising vaccine candidate against neosporosis. 相似文献
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Decreased hippocampal inhibition and a selective loss of interneurons in experimental epilepsy 总被引:46,自引:0,他引:46
R S Sloviter 《Science (New York, N.Y.)》1987,235(4784):73-76
The occurrence of seizure activity in human temporal lobe epilepsy or status epilepticus is often associated with a characteristic pattern of cell loss in the hippocampus. An experimental model that replicates this pattern of damage in normal animals by electrical stimulation of the afferent pathway to the hippocampus was developed to study changes in structure and function that occur as a result of repetitive seizures. Hippocampal granule cell seizure activity caused a persistent loss of recurrent inhibition and irreversibly damaged adjacent interneurons. Immunocytochemical staining revealed unexpectedly that gamma-aminobutyric acid (GABA)-containing neurons, thought to mediate inhibition in this region and predicted to be damaged by seizures, had survived. In contrast, there was a nearly complete loss of adjacent somatostatin-containing interneurons and mossy cells that may normally activate inhibitory neurons. These results suggest that the seizure-induced loss of a basket cell-activating system, rather than a loss of inhibitory basket cells themselves, may cause disinhibition and thereby play a role in the pathophysiology and pathology of the epileptic state. 相似文献
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设施栽培番木瓜对环斑病的防治作用 总被引:2,自引:0,他引:2
对网室栽培和地膜覆盖栽培的番木瓜(Carica papaya L.)环斑病发生规律及对该病的防治效果进行了研究。结果表明,网室栽培对番木瓜环斑病具有较好的防治效果,能显著减少发病及推迟发病高峰期。 相似文献
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Vaccination against experimental allergic encephalomyelitis with T cell receptor peptides 总被引:33,自引:0,他引:33
M D Howell S T Winters T Olee H C Powell D J Carlo S W Brostoff 《Science (New York, N.Y.)》1989,246(4930):668-670
Experimental allergic encephalomyelitis (EAE) is an autoimmune disease of the central nervous system mediated by CD4+ T cells reactive with myelin basic protein (MBP). Rats were rendered resistant to the induction of EAE by vaccination with synthetic peptides corresponding to idiotypic determinants of the beta chain VDJ region and J alpha regions of the T cell receptor (TCR) that are conserved among encephalitogenic T cells. These findings demonstrate the utility of TCR peptide vaccination for modulating the activity of autoreactive T cells and represent a general therapeutic approach for T cell-mediated pathogenesis. 相似文献
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建立高效、灵敏、特异的禽腺病毒4型(fowl adenovirus serotype 4,FAdV-4)检测方法。
将重组酶辅助扩增技术(recombinase aided amplification,RAA)与规律间隔性成簇短回文重复序列相关 Cas13a 蛋白(clustered regularly interspaced short palindromic repeats associated protein 13a,CRISPR-Cas13a)技术相结合,针对FAdV-4
本研究所建立的方法反应过程均在 37 ℃恒温条件下完成,反应体系可检测的最低扩增拷贝数为101 copies/μL,灵敏度高,且与FAdV-1、FAdV-7、FAdV-8b、FAdV-9、FAdV-10、鸡传染性喉气管炎病毒、传染性法氏囊病毒、传染性支气管炎病毒、禽流感H9亚型疫苗和新城疫病毒等禽病原核酸检测无交叉反应。该方法检测30份临床样本与 qPCR 检测的阳性检出率一致。
建立的RAA-Cas13a 方法检测 FAdV-4 具有简便、灵敏、特异等特点,可用于FAdV-4的快速检测和流行病学监测。