Search Results Heading

MBRLSearchResults

mbrl.module.common.modules.added.book.to.shelf
Title added to your shelf!
View what I already have on My Shelf.
Oops! Something went wrong.
Oops! Something went wrong.
While trying to add the title to your shelf something went wrong :( Kindly try again later!
Are you sure you want to remove the book from the shelf?
Oops! Something went wrong.
Oops! Something went wrong.
While trying to remove the title from your shelf something went wrong :( Kindly try again later!
    Done
    Filters
    Reset
  • Discipline
      Discipline
      Clear All
      Discipline
  • Is Peer Reviewed
      Is Peer Reviewed
      Clear All
      Is Peer Reviewed
  • Item Type
      Item Type
      Clear All
      Item Type
  • Subject
      Subject
      Clear All
      Subject
  • Year
      Year
      Clear All
      From:
      -
      To:
  • More Filters
9 result(s) for "白细胞介素2"
Sort by:
CD25siRNA纳米粒抑制大鼠高危角膜移植免疫排斥的实验研究
目的探讨EntransterTM-CD25siRNA纳米粒对大鼠高危角膜移植术后免疫排斥反应的抑制及延长角膜植片存活时间的作用。方法以SD大鼠为受体(n=96),Wistar大鼠为供体(n=48)。受体右眼碱烧伤后14d行穿透性角膜移植手术。术后将大鼠随机分为阴性对照组(A组)、对照siRNA治疗组(B组)、治疗1组(C组,术后2h给予EntransterTMCD25siRNA复合物点眼)、治疗2组(D组,术后2h和术后第7天给予EntransterTM-CD25siRNA复合物点眼),每组24只。裂隙灯下观察大鼠角膜情况并对其排斥反应进行评分,HE染色检测角膜组织病理学变化,透射电镜观察植片超微结构改变,免疫组化和荧光定量PCR法检测角膜CD25的表达。结果与A、B组比较,C、D两组角膜植片存活时间明显延长,差异有统计学意义(P〈0.05)。HE染色显示A、B组角膜植片增厚、水肿,胶原纤维排列紊乱,大量炎性细胞浸润;C、D组植片排斥程度较A、B组明显减轻。免疫组化染色显示各组角膜上皮层、基质层、内皮层均有CD25表达,且在A、B组中的表达明显多于C、D组。透射电镜观察显示C、D组角膜植片基质层成纤维细胞凋亡及坏死较A、B组减轻,超微结构改变具有明显差异。荧光定量PCR检测显示A、B两组角膜植片中CD25 mRNA的表达明显高于C、D组,差异有统计学意义(P〈0.05)。结论 CD25siRNA纳米粒可减轻角膜移植术后的免疫排斥反应并有效延长角膜植片存活时间。
白藜芦醇对小鼠胰岛样细胞团的抗移植排斥作用及其IL-2、IL-10表达的影响
目的探讨白藜芦醇(Res)对小鼠胰岛样细胞团(ICCs)的抗移植排斥作用及相关细胞因子表达的影响。方法采用BALB/c小鼠胚胎干细胞系B/c-ES在体外定向诱导形成ICCs,DIPA标记后移植至近交系昆明小鼠皮下。将小鼠随机分为环孢素A(CsA)组(阳性对照)、Res组、CsA+Res组和PBS组(阴性对照),每组6只,移植前3d开始给药(CsA及Res剂量均为50mg/kg),每天1次直至取材日。分别于ICCs移植后第5天和第10天取移植物常规病理切片,观察免疫排斥情况,部分切片行免疫组化染色,检测IL-2、IL-10表达情况。结果移植后第5天各组均出现不同程度的移植排斥反应,除不用免疫抑制剂的PBS组外,其余各组均有移植细胞存活;Res组和CsA+Res组IL-2表达率分别为17.5%及14.5%,明显低于CsA组(59.5%,P〈0.05),而Res组与CsA+Res组比较差异无统计学意义(P〉0.05);Res组和CsA+Res组IL-10阳性表达率(分别为23%和48%)明显高于CsA组(12.5%,P〈0.05),且CsA+Res组明显高于Res组(P〈0.05)。移植后第10天,仅CsA+Res组有少量移植细胞存活,其余各组未见移植细胞;CsA组IL-2和IL-10表达明显减弱,其余各组几乎不表达IL-2和IL-10。结论 Res可抑制小鼠ICCs移植后的急性排斥反应,其机制可能与下调IL-2表达及上调IL-10表达有关。
超滤膜提取当归补血汤对荷瘤小鼠脾细胞IL-2和IFN-γ的诱生作用
目的观察超滤膜提取当归补血汤对荷瘤小鼠脾细胞白细胞介素-2(IL-2)和γ-干扰素(IFN-γ)的诱生作用,探讨其对荷瘤小鼠免疫系统的调节机制。方珐采用超滤膜分离技术提取当归补血汤,用双抗体夹心ELISA法检测培养脾淋巴细胞上清液中IL-2和IFN-γ的含量,用反转录-聚合酶链式反应(RT—PCR)法测定脾淋巴细胞IL-2和IFN-γ mRNA的表达水平。结果超滤膜提取当归补血汤各剂量组小鼠脾淋巴细胞培养上清液中IL-2和IFN-γ的含量均较模型组增高,大剂量组与模型组比较有显著性差异(P〈0.05)。各剂量组小鼠脾淋巴细胞IL-2和IFN-γ mRNA的表达水平均增高,中剂量组和大剂量组与模型组比较,均有显著性差异(P〈0.05)。砖论超滤膜提取当归补血汤能够促进荷瘤小鼠脾淋巴细胞细胞因子IL-2和IFN-γ的分泌及其mRNA的表达,从而发挥免疫调节作用。
白细胞介素-2对小鼠神经病理性痛的镇痛作用
目的 探讨白细胞介素-2(IL-2)对神经病理性痛的镇痛作用及其可能的机制,为临床治疗神经病理性痛筛选新的镇痛药物奠定基础。方法 通过结扎雄性C57BL/6小鼠单侧L5/L6脊神经建立神经病理性痛模型,然后利用机械刺激和冷刺激诱发的痛觉超敏实验分别观察腹腔注射不同剂量(1.0×10^6、2.5×10^6、5.0×10^6u/kg)IL-2对疼痛模型小鼠患侧脚掌痛阈的影响;同时,通过5.0×10^6u/kg IL-2注射前30min腹腔注射纳洛酮(1mg/kg)以观察阿片受体拮抗剂对IL-2镇痛作用的影响。结果 腹腔注射IL-2可产生剂量依赖性镇痛作用,其中5.0×10^6u/kg和2.5×10^6u/kgIL-2均可显著提高模型小鼠患侧脚掌的50%缩足阈值(P〈0.01)和降低5min抬足次数(P<0.05),镇痛效应分别维持30min和15min,而1.0<10^6u/kgIL-2无明显的镇痛作用。IL-2产生的镇痛效应不能被纳洛酮阻断。结论 IL-2对小鼠神经病理性痛具有镇痛作用,其镇痛效应除受阿片受体介导外还可能有其他分子参与。
重组人白细胞介素-2序贯治疗80岁以上急性髓系白血病的观察
随着有效治疗方案的推出,年轻发病的急性髓系细胞性白血病(Acute Myelogenous Leukemia,AML)的预后已取得了巨大的进展。然而,老年患者,尤其是高龄患者(年龄≥80岁),由于其生理特征、发病特点及预后因素的特征,治疗效果及预后极差。随着人口老龄化现象日益明显,老年AML发病不断增加,高龄AML也相应增加。国外报道超过10%AML患者的年龄在80岁以上,而国内报道也在7.5%。由于脏器功能衰退及其生物遗传学特点,导致老年AML疗效差,预后不良。特别是高龄AML,多采用以对症支持治疗为主的姑息疗法。
白细胞介素-2协同白细胞介素-18活化自然杀伤细胞活性的作用
目的 研究白细胞介素-2(IL-2)和白细胞介素-18(IL-18)诱导自然杀伤(NK)细胞活化和抗骨髓瘤细胞活性的协同作用。方法 流式细胞仪方法检测NK细胞表面CD69的表达;阴性细胞纯化法用于获得高纯度的NK细胞;ELISA测定NK细胞培养上清液中干扰素(IFN-γ)的浓度;标准铬^51释放试验评估NK细胞杀伤骨髓瘤细胞的能力。结果 与单一应用IL-18相比,低浓度IL-2和IL-18联合应用显著提高了NK细胞的活性、分泌干扰素(IFN-γ)的水平和杀伤骨髓瘤细胞的作用。结论 低浓度IL-2具有协同IL-18活化NK细胞抗骨髓瘤细胞的作用,此结果为IL-2和IL-18联合应用治疗骨髓瘤奠定了一定的理论基础。
硒对慢性肝病患者外周血单个核细胞膜流动性的影响
目的 探讨硒对慢性肝病患者外周血单个核细胞(PBMC)膜流动性的影响。方法 分离健康人和慢性肝病患者的PBMC,分别体外培养,对比观察了预加硒(1.156×10-7mo1·L-1)和不同剂量脂质过氧化诱导剂叔丁基过氧化氢(tBHP)作用后各组PBMC膜流动性和培养液中过氧化脂质(MDA)含量变化。结果 健康人PBMC膜流动性随tBHP剂量的增加而降低,培养液中MDA含量呈相反变化;慢性肝病患者PBMC膜流动性明显下降,培养液中MDA含量增加。而经硒预保护作用6h后两组细胞上述指标均有改善。结论 脂质过氧化反应可影响人PBMC的膜流动性,硒对此具有保护作用。
The Mechanism of Chemokine Receptor 9 Internalization Triggered by Interleukin 2 and Interleukin 4
In previous study, we found that the chemokine receptor 9 (CCR9) was highly expressed on CD4^+T cells from patients with T-cell lineage acute lymphocytic leukemia (T-ALL) and mediated leukemia cell infiltration and metastasis. Combined use of interleukin 2 (IL-2) and IL-4 promoted the internalization of CCR9 and therefore attenuated leukemia cell infiltration and metastasis. In this study, we preliminarily investigated the mechanism of internalization of CCR9 on MOLT4 cell model (a human leukemia T-cell line, naturally expresses CCR9) and found that IL-2 upregulated the cell surface expression of IL-4Rα (CD124) greatly, whereas IL-4 had no significant influence on α (CD25) and β subunits (CD122) of IL-2R. Moreover, specific inhibitors, such as staurosporine, H89 and heparin, inhibited internalization of CCR9, which indicated a role of protein kinase C (PKC) and G protein-coupled kinase 2 (GRK2), respectively. Furthermore, GRK2 was upregulated and translocated to cell membrane in IL-2 and IL-4 treated cells which indicated that PKC could be a prerequisite for GRK2 activity.
Effect of Moxibustion on IL-1β and IL-2 in Rat Models of Rheumatoid Arthritis
Objective To observe the influence on IL-1β and IL-2 in rat models with rheumatoid arthritis after moxibustion on Shenshu (BL 23) and Zusanli (ST 36) points, and to discuss the mechanism of moxibustion. Methods Fifty male Wistar rats were divided randomly into 5 groups, control group, model group, drug group, moxibustion group, and laser group, 10 for each. Four groups except the normal group were built on the model of rheumatoid arthritis. The changes of body weight and plantar circumference were measured and the level of IL-1β、 IL-2 in sera were examined by ELISA. Results Compared with the model group, the weight and plantar circumference of rats in the moxibustion group were improved significantly after treatment ( P <0.01), and the improvement of plantar circumference also had significant differences compared with the drug group and the laser group ( P <0.05). The level of IL-1β、 IL-2 in sera were down regulated in the moxibustion group and the laser group, which had statistical differences compared with the model group ( P <0.05), but no statistical differences were found when comparing with the drug group. Conclusion Moxibustion obviously improves the toe tumefaction of the rats with rheumatoid arthritis, which is better than CO 2 laser of 10.6 μm. On the aspect of decreasing the amount of IL-1β、 IL-2, CO 2 laser of 10.6 μm is similar with moxibustion.