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植物血凝素是一种具有较强的免疫调节作用的高分子糖蛋白。它对T淋巴细胞、B淋巴细胞、CIK细胞等多种免疫细胞活性均有较强的促进作用。能够刺激机体产生γ-干扰素(IFN-γ)、白细胞介素-2(IL-2)、IL-4、IL-18等多种细胞因子。临床上用于各种病毒性疾病的治疗和预防、免疫功能低下疾病的过继免疫治疗、肿瘤的治疗、免疫接种时的辅助用药以及在实验室中作为刺激淋巴细胞增殖的试剂。本文对植物血凝素在各个方面的研究进展和应用现状作一综述。 相似文献
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<正>细胞因子是指由免疫细胞和某些非免疫细胞经刺激而合成分泌的一类生物活性物质,多属多肽或糖蛋白。细胞因子与内分泌激素不同,多数细胞因子不出现在血清中,而是以自分泌和(或)旁分泌形式发挥作用。1细胞因子产生的两个重要途径(1)Th1分泌的细胞因子有IL-1、IL-2、IL-6、IL-8、IFN-γ、CM-CSF、TNF-α等,参与细胞介导的免疫过程及组织炎症反应,即巨噬细胞活化,淋巴毒素作用, 相似文献
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《畜牧兽医学报》2015,(8)
为了研究猪IL-2、IL-4和IFN-γ对口蹄疫合成肽疫苗的免疫佐剂效应,将经测定具有生物学活性的猪重组IL-2、IL-4和IFN-γ与口蹄疫合成肽疫苗配伍免疫仔猪,检测仔猪抗口蹄疫抗体水平和血清细胞因子IL-4、IL-10、IL-17和IFN-γ含量的变化,观察其免疫佐剂效应。结果表明:制备的IL-2、IL-4和IFN-γ重组蛋白质均有较好的生物学活性,其中IL-2和IFN-γ重组蛋白质均能极显著提高仔猪抗口蹄疫抗体水平(P0.01),而IL-4重组蛋白质抑制口蹄疫抗体的产生(P0.01)。血清细胞因子检测结果发现口蹄疫疫苗+IL-4组的IL-4和IL-10含量均较空白疫苗免疫猪显著升高(P0.05),口蹄疫疫苗+IL-2组及口蹄疫疫苗+IFN-γ组的IFN-γ含量较空白疫苗免疫猪极显著升高(P0.01)。结果提示,重组细胞因子IL-2和IFN-γ分别作为免疫佐剂与口蹄疫疫苗联用,能显著增强机体的体液和细胞免疫应答。 相似文献
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为了研究骨髓源肥大细胞（BMMCs）通过甘露糖受体对口蹄疫病毒样颗粒（FMDV-VLPs）的细胞因子应答效应，本研究构建了重组pCMV-HA-HBcAg-VP1-VP4质粒，并转染CHO-K1细胞以制备FMDV-VLPs。用FMDV-VLPs负载经甘露糖受体（MR）抑制剂Mannan处理的BMMCs （iMR-VLP组），并设置只负载FMDV-VLPs组（VLP组）和单纯细胞组（Control组）作为对照，收集细胞上清液，用细胞因子芯片检测不同处理组BMMCs细胞上清中细胞因子的含量。结果显示：与Control组相比，VLPs组BMMCs表达IL-1α、IL-2、IL-4、IL-15、IL-17A、IL-21、TNF-α、IFN-γ、CC17和CCL21均显著上调（P<0.05），而IL-10没有显著变化，iMR-VLP组BMMCs表达IL-1α、IL-2、IL-4、IL-15、IL-17A、TNF-α、IFN-γ、CCL-17和L-Selectin显著下调（P<0.05），而IL-9、IL-10、CCL19和CCL21的表达则呈上调变化。综上所述，FMDV-VLPs可以促进BMMCs一系列细胞因子的分泌，而抑制MR后，BMMCs分泌细胞因子能力受到了一定程度的抑制，表明FMDV-VLPs可能通过BMMCs的甘露糖受体增强Th1型细胞因子分泌、有效抑制能引起免疫抑制的IL-10的分泌，并降低介导T细胞的再循环的CCL19和CCL21的形成。研究结果为基于肥大细胞甘露糖受体应答效应的口蹄疫新型疫苗的研发提供了理论依据和新思路。 相似文献
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《中国畜牧兽医》2010,(10)
CpG ODN诱导不同物种先天性免疫反应的分析结果表明,诱导细胞因子(CK)分布的种类和水平存在明显的异同。试验对3类CpG ODNs(A、B、C类)如何激活猪先天性免疫生物标记及猪免疫细胞在体内外培养(含CpGODNs)中的先天性免疫反应动力学进行了研究。利用实时定量PCR(SYBR Green)分析了细胞因子和趋化因子基因的mRNA表达水平。结果发现,A-类CpG ODN可显著诱发IFN-γ、IL-12(P40)、IL-6、IL-4、TNF-αmRNA的瞬间表达;C-类CpG ODN可显著诱发IFN-γ、IFN-α、IL-12 mRNA的表达,并使IL-4(Th-2型)mRNA降至最低表达水平,GCODNs可刺激使一些细胞因子的表达水平降至最低;B-classGpC ODN7909能显著影响IL-12(P35)mRNA表达水平。值得注意的是,12 h时3类CpG ODNs刺激均可显著诱导IP-10的mRNA表达。体内外试验结果表明,IP-10可作为CpG ODNs诱发猪免疫活性的生物标记。 相似文献
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植物血凝素是一种具有较强的免疫调节作用的高分子糖蛋白。它对T淋巴细胞、B淋巴细胞、CIK细胞等多种免疫细胞活性均有较强的促进作用。能够刺激机体产生γ-干扰素（IFN-γ）、白细胞介素-2（IL-2）、IL-4、IL-18等多种细胞因子。临床上用于各种病毒性疾病的治疗和预防、免疫功能低下疾病的过继免疫治疗、肿瘤的治疗、免疫接种时的辅助用药以及在实验室中作为刺激淋巴细胞增殖的试剂。本文对植物血凝素在各个方面的研究进展和应用现状作一综述。 相似文献
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《畜牧兽医学报》2015,(7)
本研究旨在揭示BLec1、BNK及细胞因子在B21和B19两种单倍型鸡对马立克病(MD)抗性差异中的可能机制。分别对B21和B19单倍型1日龄鸡腹腔接种马立克病毒(MDV)超强毒株,在攻毒后不同时间检测鸡外周血淋巴细胞中BLec1、BNK及IFN-γ、IL-4、IL-10和IL-18的基因转录水平。结果显示,在第4、7天,两种鸡BNK、BLec1和4种细胞因子水平表现出不同程度的降低。在第10天,B21单倍型鸡中BNK、BLec1、IFN-γ、IL-4和IL-18基因转录量出现不同程度的升高,而B19单倍型鸡中细胞因子转录水平有所下降。在第13天,B21单倍型鸡中BNK、BLec1、IL-18和IL-10基因转录量表现出不同程度的升高,而B19单倍型鸡中则有所下降。以上结果总体表明,MD耐受型鸡在感染沉默期BNK、BLec1和细胞因子转录量高于敏感型,不同遗传基因型鸡对MD的抗性差异与耐受基因及细胞因子的转录情况有着密切的关系。 相似文献
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《中国兽医学报》2019,(2):276-280
选取120只1日龄的SPF雏鸡,随机分为低硒饲料组和正常饲料组。分别在试验期7,14,21,28d对雏鸡进行剖杀并取其空肠与回肠,用实时荧光定量PCR法检测IL-2、IL-4和IFN-γ基因转录结果,以明确硒缺乏对雏鸡肠黏膜免疫功能的影响。结果表明:试验组与对照组相比,试验组雏鸡在试验期14和21d时,空肠中IL-4基因转录结果极显著降低(P0.01),IL-2和IFN-γ基因转录结果极显著升高(P0.01);28d时,IL-4基因转录结果极显著降低(P0.01),IL-2基因转录结果显著降低(P0.05),IFN-γ基因转录结果无明显差异。试验组与对照组相比,试验组雏鸡在试验期14和21d时,回肠中IL-4基因转录结果极显著降低(P0.01),IL-2和IFN-γ基因转录结果极显著升高(P0.01);28d时,IL-2、IL-4、IFN-γ基因转录结果极显著降低(P0.01)。结果说明,硒对雏鸡肠黏膜部分细胞因子IL-2、IL-4、IFN-γ的分泌具有一定的调节作用,为硒调控肠黏膜免疫的机制研究奠定基础。 相似文献
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《中国兽医学报》2014,(10):1598-1602
以实时荧光定量PCR方法检测了艾美尔球虫(Eimeria tenella)子孢子体外刺激鸡异嗜白细胞和巨噬细胞炎性细胞因子IFN-γ、IL-6、IL-10和IL-12mRNA表达水平。结果发现,与不刺激对照组相比,活的E.tenella子孢子刺激异嗜白细胞(4h)和巨噬细胞IL-6mRNA表达水平显著增加(P<0.05)。灭活的E.tenella子孢子刺激异嗜白细胞和巨噬细胞IFN-γ、IL-6、IL-10和IL-12mRNA表达水平均高于活的E.tenella子孢子,差异显著(P<0.05)。与不刺激对照组相比,灭活的E.tenella子孢子刺激异嗜白细胞IL-6、IL-10、IL-12(2h)和IFN-γ(4h)mRNA表达水平均显著增加(P<0.05),灭活的E.tenella子孢子刺激巨噬细胞IL-6、IL-12和IFN-γmRNA表达水平显著上调(P<0.05)。表明,鸡异嗜白细胞和巨噬细胞受到E.tenella子孢子刺激后炎性细胞因子的显著上调可能与机体清除球虫感染有关。 相似文献
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Tomoya Kono Hiroaki Takayama Ryusuke Nagamine Hiroki Korenaga Masahiro Sakai 《Veterinary immunology and immunopathology》2013,151(1-2):90-101
To monitor the expression of cytokine genes in Japanese pufferfish, a novel platform for quantitative multiplexed analysis was developed. This custom-designed multiplex RT-PCR assay was used to analyze the expression profiles of 19 cytokine genes, including pro-inflammatory (IL-1β, IL-6, IL-17A/F3, IL-18, TNF-α, TNF-N), anti-inflammatory (IL-4/13A, IL-4/13B, IL-10), T-cell proliferation/differentiation (IL-2, IL-15, IL-21, TGF-β1), B-cell activation/differentiation (IL-7, IL-6, IL-4/13A, IL-4/13B), NK cell stimulation (IL-12p35 and IL-12p40), induction of anti-viral activity (I-IFN-1 and IFN-γ), and monocyte/macrophage progenitor cell proliferation (M-CSF1b) cytokines in head kidney cells under immune stimulatory conditions. The expression profiles were dissimilar in the unstimulated control and immune-stimulated cells. Moreover, increased expression profile was observed due to different stimulations for IL-1β, IL-6, IL-10, IL-12p35, IL-12p40, IL-21, TNF-α, TNF-N, I-IFN-1 and IFN-γ genes. These results suggest that cytokine genes could be used as biomarkers to know the immune status of fish. The constructed multiplex RT-PCR assay will enhance understanding on immune regulation by cytokines in fish. 相似文献
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Regulation of TLR responses is required in the intestine to prevent unnecessary responses to commensal microorganisms and maintain tissue homeostasis. Several mechanisms have been proposed for the regulation of TLR responses in intestinal epithelial and lamina propria cells. However, whether this regulation occurs in Peyer's patches (PP) is not known. While investigating cellular responses to the TLR9 agonist CpG ODN, we observed that PP cells responded poorly to CpG ODN stimulation despite expressing TLR9. We hypothesized that PP cells produced the immunoregulatory cytokine IL-10 which suppressed TLR-induced cytokine responses. In vitro neutralization of IL-10 or depletion of CD21+ B cells from PP resulted in significant increases in IL-12, IFNγ and IFNα responses in PP cells stimulated with CpG ODN. Essentially, our investigation have identified a novel population of IL-10-secreting B cells in PP with regulatory functions (B(regs)). These B(regs) may play an important role in the maintenance of intestinal homeostasis. 相似文献
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通过体外试验观察干扰素-α(IFN-α)对滤泡辅助性T细胞(Tfh)分化及功能的影响。无菌分离小鼠脾细胞,磁珠分选CD4^+T细胞,加入抗CD3单克隆抗体、抗CD28单克隆抗体,重组IL-21、IL-6进行刺激,同时加入重组IFN-α(设不加IFN-α的阴性对照)进行培养,分别在培养后的1、3、5d,流式细胞术检测Tfh细胞(CD4^+CXCR5^+)和CD4^+CXCR5^+PD-1^+细胞的比例;ELISA检测细胞上清中Tfh细胞功能性细胞因子IL-4、IL-21的水平;real-time PCR检测培养3d后Tfh细胞相关转录因子STAT1、Bcl-6以及细胞因子IL-21mRNA的表达水平。结果表明,与阴性组相比,IFN-α能明显促进Tfh细胞的分化及Tfh细胞中PD-1的表达(P<0.05),能提高Tfh细胞功能性细胞因子IL-4、IL-21的分泌水平(P<0.05);IFN-α能正向调控Tfh细胞相关转录因子STAT1、Bcl-6以及细胞因子IL-21mRNA的表达水平(P<0.05)。说明IFN-α可通过正向调控STAT1、Bcl-6的表达,促进Tfh细胞的分化和细胞因子的分泌。 相似文献
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Hughes KJ Nicolson L Da Costa N Franklin SH Allen KJ Dunham SP 《Veterinary immunology and immunopathology》2011,140(1-2):82-89
Inflammatory airway disease (IAD) is a common disorder of performance horses and is associated with poor performance and accumulation of mucus and inflammatory cells in lower airway secretions. Horses with IAD frequently have increased relative counts of neutrophils in bronchoalveolar lavage fluid (BALF); less commonly relative counts of eosinophils and/or mast cells may be increased. The aetiopathogenesis of IAD is unknown and may involve innate and/or acquired immune responses to various factors including respirable dust constituents, micro-organisms, noxious gases and unconditioned air. The molecular pathways and role of the immune system in the pathogenesis of IAD remain poorly defined and it is unknown whether polarised T cell responses occur in the disease, as have been reported to occur in equine recurrent airway obstruction and asthma in humans. Elucidating cytokine responses that develop in horses with IAD may allow a greater understanding of the possible aetiopathological pathway(s) involved and could contribute to development of novel treatments. We compared the mRNA expression of tumour necrosis factor-alpha (TNF-α), interferon-gamma (IFN-γ), interleukin (IL)-1β, IL-2, IL-4, IL-8, IL-13, IL-17 and IL-23 in cell pellets extracted from BALF of horses with IAD (n=21) and horses free of respiratory tract disease (n=17). Horses with IAD had significantly increased levels of TNF-α, IL-1β and IL-23 mRNA; no significant differences in the other cytokine mRNAs were detected. The results of this study indicate that IAD of horses is associated with increased mRNA expression of pro-inflammatory cytokines in BALF cells, which may reflect stimulation of the innate immune responses to inhaled antigens. There was no evidence of a polarised T-cell cytokine response suggesting hypersensitivity responses may not be involved in the aetiopathogenesis of IAD. 相似文献
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Wang J Fang J Guo J Teng Q Huang Z Gu J Shen H Zhou J 《Veterinary immunology and immunopathology》2007,117(3-4):266-274
The IL-2Ralpha chain (CD25, Tac) is an essential component of high affinity IL-2Rs, playing critical role for the immune specificity of antigen-activated T-cell clonal expansion. Up to now, no duck cytokine receptor has been described. Here, the cDNA segment of a duck cytokine receptor (duCD25), encoding a 226 aa precursor protein with a 20 aa signal peptide, was isolated. Then a novel mouse monoclonal antibody (mAb) was generated using the prokaryotically expressed duCD25 protein as immunogen. Using this mAb, the endogenous duCD25 molecule was localized on the surface of duck lymphocytes, and the duck IL-2-induced lymphocyte proliferation was further inhibited. Furthermore, flow cytometry analysis showed that duCD25 positive cells were upregulated in ducks infected with avian influenza virus (H9N2). Our findings confirm that duCD25 is a receptor of duck interleukin-2, and duCD25 positive cells play a potential role in H9N2 virus infection. 相似文献
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Th细胞和IL在小鼠寄生虫免疫中的作用 《畜牧与饲料科学》2016,37(11):104-104
Th17细胞（T helper 17 cells,Th17）是CD4~＋T细胞分化的亚群细胞之一,能够特异性地分泌细胞因子IL-17（interleukin-17,IL-17）,通过IL-17、IL-21、IL-23等细胞因子介导炎症反应和针对细菌的抗感染免疫,同时在寄生虫免疫中发挥重要作用。 相似文献
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Erin E. McCandless Catherine A. Rugg Gregory J. Fici James E. Messamore Michelle M. Aleo Andrea J. Gonzales 《Veterinary immunology and immunopathology》2014,157(1-2):42-48
The canine cytokine IL-31 induces pruritus in dogs and can be detected in dogs with atopic dermatitis; however very little is understood around its interactions with specific canine cells. We hypothesize that IL-31 is involved in the progression of allergic skin disease by coordinating the interaction between the immune system with skin and neuronal systems. The goal of the following work was to identify cells that produce IL-31 as well as cells that may respond to this cytokine. Peripheral blood mononuclear cells (PBMCs) were collected from naïve and house dust mite (HDM) allergen-sensitized beagle dogs and used for ex vivo characterization of cytokine production assessed using ELISpot and quantitative immunoassay. Sensitization to HDM allergen induced a T-helper type 2 (Th2) cell phenotype characterized by an increase in the production of IL-4 protein. Interestingly, repeated allergen challenge over time also resulted in an increase in IFN-γ. Further evaluation showed that co-stimulation of Th2 polarized cells with antigen and the bacterial component Staphylococcus enterotoxin B (SEB) produced higher levels of IL-31 compared to either stimulant alone. Production of IL-31 when PBMCs were stimulated by T cell mitogens suggests T cells as a source of IL-31. Quantitative real-time PCR was utilized to determine expression of the IL-31 receptor alpha chain in canine cell lines and tissue. Canine monocytic cells, keratinocytes, and dorsal root ganglia were shown to express the IL-31 receptor alpha chain mRNA. In a multifaceted disease such as canine atopic dermatitis, the combination of Th2 polarization and microbial presence may lead to IL-31 mediated effects driving inflammation and pruritus by immune cells, keratinocytes, and direct neuronal stimulation. 相似文献