基于网络药理学探讨活血化瘀药治疗子宫内膜异位症的作用机制

目的 利用网络药理学探究活血化瘀药治疗子宫内膜异位症（endometriosis,EM）的可能作用机制。方法 以桃仁、红花、泽兰、丹参、益母草、川牛膝、王不留行等七味临床常用活血化瘀中药为研究主体。利用中药化学成分数据库TCMSP平台,检索获取七味活血化瘀药有效活性成分,通过Targets information软件获得有效成分对应靶点。使用GeneCards数据库收集EM相关靶基因,利用韦恩图工具得到活血化瘀药有效成分治疗EM的靶基因。应用Cytoscape 3.6.0软件构建活性成分－作用靶点－疾病网络。应用KEGG数据库分析获得靶点基因富集的信号通路。结果 七味活血化瘀药共筛选出94种活性成分,119个作用靶标。其中槲皮素、木犀草素、山柰酚等为关键活性成分,PTGS2、PTGS1、NCOA2、NCOA1等为关键靶点。七味中药共有20条EM相关KGEE通路,涉及性激素、炎症、细胞调亡以及血管生成等各个方面,其中PI3K-Akt、IL-17、TNF-α等炎症相关通路为主要通路。结论 活血化瘀药治疗EM具有多成分、多靶点、多通路的特点,针对EM的疼痛、炎症以及月经紊乱状态均有治疗作用。     

强直性脊柱炎患者外周血中B淋巴细胞亚群、B细胞活化因子及其受体的表达研究

目的 研究强直性脊柱炎(AS)患者外周血中B淋巴细胞亚群、B细胞活化因子(BAFF)及其受体BP3的表达,为进一步探讨AS发病机制提供新的理论依据.方法 采用流式细胞术测定24例AS患者及30名正常健康体检者外周血中CD19+总B细胞、CD19+ CD20+ CD27 -初始B细胞、CD19+ CD20+ CD27+记...     

槲皮素抑制血小板活化因子受体结合作用的研究

目的 :观察槲皮素对氚标记的血小板活化因子与血小板膜上受体结合的影响 ,试图证明该药为一新型血小板激活因子 (PAF)受体拮抗剂。方法 :以放射配基结合试验观察 [3H]PAF与兔血小板受体特异性结合的作用 ;以分光光度法测定PAF诱发血小板黏附的强度。结果 :槲皮素可浓度依赖地抑制2 5 ,5 0 ,10 0nmol·L- 1 [3H]PAF与兔血小板受体的特异性结合 ;该药可明显抑制PAF诱发的血小板黏附 ,具明显的量效关系 ,其IC50 为 39 8μmol·L- 1 。结论 :槲皮素具抗PAF作用 ,为一新的PAF受体拮抗剂。     

血小板活化因子受体拮抗剂干扰实验性肾炎的疗效观察及机理探讨

实验大鼠均制成加速型抗肾小球基膜（GBM）肾炎模型，分为三组：模型组、血小板活化因子（PAF）受体拮抗剂BN－52021组和血栓素A2（TXA2）合成酶抑制剂UK－38485组，结果BN－52021组大鼠各期尿蛋白量较模型组显著减少（P＜0．01），第21天时血清肌酐、肾皮质内TXB2含量较模型组显著降低（P＜0．01）；光镜和电镜下肾组织病理改变明显较模型组为轻；UK-8485组尿蛋白量也倾向于较模型组减少，担无统计学意义．第21天时血清肌酐、肾皮质内TXB2含量也较模型组显著降低（P＜0．01）．本实验表明，PAF受体拮抗剂干扰该大鼠肾炎有效，其有效机理可能部分是通过减少肾皮质TXA2合成而介导的。     

Islet activating protein (IAP) derived from the culture supernatant fluid of Bordetella pertussis: Effect on spontaneous diabetic rats

Summary The early phase of insulin secretion to an oral glucose load was blunted in spontaneous diabetic rats. The blunted insulin secretion was associated with markedly impaired glucose tolerance. A single injection of the islet activating protein (IAP), a protein derived from the culture medium of Bordetella pertussis, into the spontaneous diabetic rats normalised glucose tolerance. The increase in insulin response to glucose was an important contributing factor to the improvement of glucose tolerance. This curative effect of the IAP on the diabetic state was of long duration; glucose tolerance remained virtually normal over a period of one month in the diabetic rats. Perfusion of the isolated pancreas of the diabetic rats pretreated with IAP showed an increase in insulin response to glucose and loss of suppression of glucagon secretion by noradrenaline.     

IP-10-induced recruitment of CXCR3 host T cells is required for small bowel allograft rejection

BACKGROUND & AIMS: Chemokines mediate cell trafficking in inflammatory states such as allograft rejection. However, their role in small-bowel allograft rejection has not been defined. The aim of this study was to examine the roles of type 1 helper T-cell chemokines in small-bowel allograft rejection. METHODS: Mucosal histology, chemokine messenger RNA (real-time polymerase chain reaction), and cell isolates were examined in small-bowel allografts and isografts. Interferon-gamma-inducible protein-10/CXC chemokine receptor (CXCR) 3 interactions were specifically evaluated by using allografts from interferon-gamma-inducible protein-10(-/-) donors and adoptive transfer of CXCR3(-/-) T cells into recombination activating gene (RAG)-1(-/-) recipients of small-bowel allografts. RESULTS: Type 1 helper T-cell cytokine (interferon-gamma) and chemokine (interferon-gamma-inducible protein-10, monokine induced by interferon-gamma, macrophage-inflammatory protein-1 alpha, and regulated on activation, normal T cells expressed and secreted) messenger RNA up-regulation was detected (real-time polymerase chain reaction) by postoperative day 3 in small-bowel allografts. Interferon-gamma-inducible protein-10(+/+) small-bowel allograft rejection was associated with a dramatic (>7-fold) increase in CXCR3(+) host T cells in the graft lamina propria. With interferon-gamma-inducible protein-10(-/-) small-bowel allografts, CXCR3(+) host T-cell infiltration of the graft lamina propria was markedly decreased and rejection was significantly delayed. Whereas adoptive transfer of wild-type B6 (CXCR3(+/+)) T cells into B6 (RAG-1(-/-)) recipients induced rapid rejection of CB6F1 small-bowel allografts, rejection was significantly delayed (29.2 +/- 8.7 days vs. 16.5 +/- 3.1 days; P < 0.01) in B6 (RAG-1(-/-)) mice reconstituted with T cells from B6 (CXCR3(-/-)) mice. CONCLUSIONS: Recruitment of CXCR3(+) host T cells by donor derived interferon-gamma-inducible protein-10 may precipitate small-bowel allograft rejection. These data highlight the importance of type 1 helper T cell-related chemokines in promoting cell-mediated rejection responses in small-bowel allografts and suggest that interferon-gamma-inducible protein-10 is an attractive therapeutic target for humanized monoclonal antibody strategies.     

幽门螺杆菌重组中性粒细胞激活蛋白蛋黄抗体的制备

目的:制备高效价的.抗Nap蛋黄抗体(IgY).方法:大量诱导、培养重组菌pQE30-NapA-DH5α获得重组蛋白Nap,经Ni2 -NTA树脂纯化后,Bradford法测定蛋白浓度.用纯化的Nap蛋白免疫鸡,水稀释结合氯仿有机沉淀法提取IgY.ELISA法测定抗体产生的时间-效价变化.将效价高的Nap-IgY用硫酸铵沉淀法纯化浓缩,间接ELISA法检测效价,Bradford法测定蛋白含量.Western blot检测制备的Nap-IgY的抗体活性.结果:Nap重组蛋白主要以包涵体形式表达,蛋白含量为0.37 g/L.免疫鸡的蛋黄提取物可与Nap发生特异性反应,IgY效价随免疫时间增加而升高,在110 d达最高效价.经纯化浓缩后,Nap-IgY的效价为1:12800,蛋白浓度为23.67 g/L.结论:成功制备了高浓度、高效价的Nap特异性IgY.     

肿瘤坏死因子α对肝细胞脂肪变性模型裂解激活蛋白表达的影响

目的探讨TNFα对油酸诱导的脂肪变性肝细胞模型固醇调节元件结合蛋白裂解激活蛋白（SCAP）的表达及TG含量的影响。方法以正常肝细胞株L02进行细胞培养,用油酸诱导建立肝细胞脂肪变性模型,在对照组（C组）及模型组（F组）中加入TNFα（C1组和F1组）与抗TNFα抗体（C2组和F2组）分组进行培养,采用RT PCR法检测SCAP mRNA的表达,Western blot检测SCAP蛋白的表达,采用油红O染色观察细胞内脂滴的变化,并检测细胞内甘油三酯含量。结果TNFα作用组SCAP mRNA的表达上调,C1组比C组上调67%,F1组比F组上调55%,F-212.98,P〈0.01,差异有统计学意义。TNFα作用组SCAP蛋白的表达也上调,C1组比C组上调45%,F1组比F组上调95%,F-104.3,P〈0.01,差异有统计学意义。而使用抗TNFα抗体作用后表达显著下调,细胞内TG含量,对照组为（2.02±0.67）mg/10^7细胞,模型组为（7.79±1.35）mg/10^7细胞,模型组TNFα组为（13.36±1.99）mg/10^7细胞,F-82.94,P〈0.01,TNFα作用组较对照组脂变细胞数量增多,差异有统计学意义,而使用抗TNFα抗体作用后脂变细胞数量减少,细胞内TG含量显著下降。结论TNFα上调L02肝细胞SCAP的表达,促进细胞内TG的合成,可能参与了肝细胞脂肪变性的形成。