ITP患者骨髓及血液检测指标与疗效关系的探讨

目的：为观察血小板表面相关抗体Ｇ（ＰａＩｇＧ）、外周血血小板计数（ＢＰＣ）、平均血小板容积（ＭＰＶ）、骨髓巨核细胞计数（ＭＫ）与产板型巨核细胞比例（ＰＰＭＫ）对特发性血小板减少性紫癜（ｉｄｉｏｐａｔｈｉｃ ｔｈｒｏｍｂｏｃｙｔｏｐｅｎｉｃｐｕｒｐｕｒａ,ＩＴＰ）患者疗效的预计价值。方法：采用Ｃｏｕｌｔｅｒ全自动血球分析仪及双抗体夹心ＥＬＩＳＡ法等,对７３例ＩＴＰ患者治疗前和治疗后的ＢＰＣ、ＭＰＶ、     

应用动态血压观察氯沙坦钾治疗难治性高血压的临床疗效

目的 :观察氯沙坦钾治疗高血压的临床疗效。方法 :选择 3 2例其他降压药物疗效不佳的高血压患者 ,年龄 4 1～ 67( 55.6± 6.5)岁 ,服用氯沙坦钾 50 mg～ 1 0 0 mg/d,总疗程为 6w。全部病人在服用氯沙坦钾前和服用氯沙坦钾 6w后均行动态血压监测 ( ABPM)、偶测血压及肝肾功能、血脂和血糖检查。结果 :1 .用药后 2 4 h平均血压、日昼和夜间平均血压比用药前下降 ( P<0 .0 1 ) ,用药后收缩压及舒张压负荷均较用药前明显下降 ( P<0 .0 1 )。 2 .偶测血压疗效　服氯沙坦钾降压有效率为 1 0 0 % ,其中 2例需 1 0 0 mg/d,1例加用了双氢克尿噻 1 2 .5mg/d。 3 .降压作用的谷 /峰比值　氯沙坦钾降低收缩压和舒张压的谷 /峰比值分别为 71 .6%和 68.1 %。结论 :Ang II受体拮抗剂是继 ACEI之后的新一类抗高血压药物 ,与 ACEI相比 ,此类药物直接作用于AT1受体 ,降压作用安全可靠 ,副作用少 ,对于其他降压药物疗效不佳的高压患者也有良好效果     

哮喘急性发病与IL-5、sIL-2R及NO关系的研究

目的;探讨白介素－５（ＩＬ－５）、可溶性白介素－２受体（ｓＩＬ－２Ｒ）、一氧化氮（ＮＯ）及嗜酸粒细胞（ＥＯＳ）计数在哮喘急性发病中的意义。方法：对急性发作期哮喘患者及正常对照者血清ＩＬ－５,ｓＩＬ－２Ｒ和ＮＯ水平及ＥＯＳ计数进行了研究。使用ＩＬＩＳＡ法检测血清ＩＬ－５、ｓＩＬ－２Ｒ水平,硝酸还原酶法检测ＮＯ,伊红粉法计数ＥＯＳ。结果：哮喘急性发作组血清ＩＬ－５,ｓＩＬ－２Ｒ,ＮＯ及ＥＯＳ水平均明显     

Single-cell fate mapping reveals widespread clonal ignorance of low-affinity T cells exposed to systemic infection

T cell ignorance is a specific form of immunological tolerance. It describes the maintenance of naivety in antigen-specific T cells in vivo despite the presence of their target antigen. It is thought to mainly play a role during the steady state, when self-antigens are presented in absence of costimulatory signals and at low density or to T cells of low affinity. In how far antigen-specific T cells can also remain clonally ignorant to foreign antigens, presented in the inflammatory context of systemic infection, remains unclear. Using single-cell in vivo fate mapping and high throughput flow cytometric enrichment, we find that high-affinity antigen-specific CD8⁺ T cells are efficiently recruited upon systemic infection. In contrast, most low-affinity antigen-specific T cells ignore the priming antigen and persist in the naïve state while remaining fully responsive to subsequent immunization with a high-affinity ligand. These data establish the widespread clonal ignorance of low-affinity T cells as a major factor shaping the composition of antigen-specific CD8⁺ T cell responses to systemic infection.     

Effects of probenecid and brilliant blue G on rat enteric glial cells following intestinal ischemia and reperfusion

The P2X7 receptor participates in several intracellular events and acts with the pannexin-1 channel. This study examined the effects of probenecid (PB) and brilliant blue G (BBG), which are antagonists of the pannexin-1 channel and P2X7 receptor, respectively, on rat ileum enteric glial cells after on ischemia and reperfusion. The ileal vessels were occluded for 45 min with nontraumatic vascular tweezers, and reperfusion was performed for periods of 24 h and 14 and 28 days. After ischemia (IR groups), the animals were treated with BBG (BG group) or PB (PB group). The double-labeling results demonstrated the following: the P2X7 receptor was present in enteric glial cells (S100β) and enteric neurons positive for HuC/D; enteric glial cells exhibited different phenotypes; some enteric glial cells were immunoreactive to only S100β or GFAP; and the pannexin-1 channel was present in enteric glial cells (GFAP). Density (in cells/cm²) analyses showed that the IR group exhibited a decrease in the number of cells immunoreactive for the P2X7 receptor, pannexin-1, and HuC/D and that treatment with BBG or PB resulted in the recovery of the numbers of these cells. The number of glial cells (S100β and GFAP) was higher in the IR group, and the treatments decreased the number of these cells to the normal value. However, the PB group did not exhibit recovery of S100β-positive glia. The cell profile area (μm²) of S100β-positive enteric glial cells decreased to the normal value after BBG treatment, whereas no recovery was observed in the PB group. The ileum contractile activity was decreased in the IR group and returned to baseline in the BG and PB groups. BBG and PB can effectively induce the recovery of neurons and glia cells and are thus potential therapeutic agents in the treatment of gastrointestinal tract diseases.     

陕西株庚型肝炎病毒(GBV-C/HGV )RNA NS3区 cDNA(4248nt～4465nt)的扩增、克隆和序列分析

目的　了解陕西株庚型肝炎病毒 (HGV,RNA/ GBV-C)的核苷酸序列特点 .方法　从陕西省西安市两位非甲、乙、丙、丁、戊型肝炎患者的血清中 ,应用反转录及套式 PCR技术 ,从血清中提取 RNA,经特异性的反转录引物 P4反转录成c DNA,以此为模板分别用 P3,P4及 P1 ,P2 两对引物进行PCR扩增 ,扩增到 2 18bp的 HGV RNA NS3区部分基因 ,将其克隆入 Pin Point TMXal- T载体 ,挑选阳性克隆并进行了序列分析 .结果　 SG2 与 HGV的核苷酸同源性分别为 85 .6 4%与84.48% ;与 GBV- C的核苷酸同源性为 86 .2 1%与 84.48% ,其二者之间同源性为 97.13% ;二者与 HGV的氨基酸同源性分别为 98.2 8%和 93.10 % ,与 GBV- C的氨基酸同源性也为98.2 8% ,93.10 % ,二者之间的氨基酸同源性达 94.83% .结论　庚型肝炎病毒 NS3区核苷酸同源性较高 ,同义突变率也较高 ,可能是一个对其生存环境较为适应的病毒 .     

非NMDA受体拮抗剂对大鼠牙髓伤害性刺激诱导的延髓Fos表达

目的 研究兴奋性氨基酸非ＮＭＤＡ受体在牙髓伤害性信息传递中的作用,为揭示牙痛的产生机制打下基础。方法 将实验动物随机分为４组。第１组单纯给予机械穿髓刺激;第２组预先侧脑室注射非ＮＭＤＡ受体拮抗剂ＣＮＱＸ,再给予相同的穿髓刺激;第３组只行ＣＮＱＸ侧脑室注射,不予穿髓刺激;第４组为正常对照组。动物存活相同时间后取延髓做Ｆｏｓ蛋白免疫组化反应。观察３组动物Ｆｏｓ免疫反应阳性细胞的数量与第１组比较没有显著     

氧化低密度脂蛋白、低氧和5-HT对血管平滑肌细胞5-HT2A受体及胞内游离钙的影响

目的　为探讨粥样硬化病变动脉对 5 - HT收缩反应增加的机制 ,观察与粥样硬化有关因子氧化低密度脂蛋白 (ox L DL)、低氧、5 - HT对血管平滑肌细胞 5 - HT2 A受体及其基因表达 ,以及细胞 [Ca2 ]i的效应。方法　分别将大鼠主动脉平滑肌细胞单独以 5 0 μg/ m l ox L DL 培养 8h,2 %低氧处理 2 4和 48h,10 μm ol/ L 5 - HT处理30 min,放射配基结合分析测定 5 - HT2 A受体 ;RT- PCR和 Southern杂交检测受体基因的 m RNA;激光共聚焦扫描显微镜测单个细胞 [Ca2 ]i。结果　经 ox L DL、低氧、 5 - HT处理 ,血管平滑肌细胞 5 - HT2 A受体显著上调 (P<0 .0 1) ;ox L DL及低氧处理的受体基因的 m RNA表达增加 ;ox L DL、低氧处理后 ,5 - HT刺激的血管平滑肌细胞[Ca2 ]i升高幅度显著加大 (P<0 .0 5及 P<0 .0 1)。结论　 ox L DL、低氧、5 - HT引起血管平滑肌细胞 5 - HT2 A受体上调及细胞 [Ca2 ]i增加 ,可能是粥样硬化动脉对 5 - HT收缩反应增强的部分原因。     

兔体外循环对胃泌素及其受体的影响

目的　研究体外循环 (CPB)过程中胃泌素及胃泌素受体的释放对胃液 p H值的影响 .方法　采用兔 CPB模型 ,分别测定 CPB过程中胃液的 p H值 ,胃液及血清中胃泌素质量浓度 ,并通过原位杂交的方法检测胃泌素受体 m RNA在胃肠道粘膜中的表达 .结果　 CPB过程中胃液的 p H值 (2 .2 1±0 .2 2 )与血液的 p H值 (7.40± 0 .15 )呈明显相关性 (P<0 .0 1) ,而且胃液的 p H值随 CPB时间增加 ,CPB组 (2 .2 1±0 .2 2 )较对照组明显降低 (5 .30± 0 .17,P<0 .0 1) .胃液及血清中胃泌素质量浓度随体外循环时间延长较对照组明显增高 .胃泌素受体 m RNA的表达量 (0 .43± 0 .0 4) %随 CPB时间增加较对照组明显增加 (0 .2 7± 0 .0 8) % ,(P<0 .0 1) .结论　 CPB过程中随时间延长 ,胃液及血清中胃泌素浓度增高 ,胃液 p H值降低及胃泌素受体 m RNA的表达量增高使胃粘膜处于高酸环境中 ,是 CPB术后发生胃肠道并发症的潜在的危险因素     

卵巢癌患者手术前后IL-2,sIL-2R及mIL-2R水平改变的临床意义

探讨卵巢癌患的细胞状态以及ＩＬ－２血清游离白细胞介素－２受体,外周血单个核细胞膜结构型白细胞介素－２受体与临床的关系。方法＾３Ｈ－ＴｄＲ参入法测３１例卵巢癌患ＩＬ－２产生水平,ＥＬＩＳＡ法检测血清ｓＩＬ－２Ｒ水平,ＡＰＡＡＰ免疫组化检测外周血单个核细胞膜结合型ＩＬ－２Ｒ表达细胞。