MBP对PBMC产生IFN-γ和NO的影响

目的探讨T细胞非特异性活化在CNS脱髓鞘性疾病中的作用。方法分离实验性自身免疫性脑脊髓炎(EAE)易感性BALB/c小鼠外周血单个核细胞(PBMC),采用体外细胞培养方法在体外与碱性髓鞘蛋白(MBP)共培养,测定培养上清液中IFN-γ、NO水平。结果经MBP刺激的PBMC产生IFN-γ[(43.83±6.06)pg/mL]和NO[(180.76±20.75)μmol/L]明显增加,与对照组产生的IFN-γ[(28.52±2.18)pg/mL]和NO[(95.61±13.09)μmol/L]相比差异有统计学意义(P<0.01)。结论在CNS脱髓鞘性疾病发病过程中,活化的T细胞、单核细胞等分泌致炎细胞因子和其他有害物质增多。     

纳洛酮对中重型颅脑损伤病人血浆C-反应蛋白的影响

目的评价纳洛酮对脑外伤的早期疗效及C-反应蛋白(CRP)检测在纳洛酮治疗脑外伤中的应用价值。方法将68例重型脑外伤病人随机分为治疗组30例和对照组38例,对照组给予常规治疗,治疗组在常规治疗的基础上,给予纳洛酮0.4mg·kg-·1d-1治疗。观察病人的GCS评分、颅内压及头颅CT所示脑水肿的变化,并测定治疗前后血清CRP浓度。结果治疗组在提高GCS评分、降低颅内压、控制脑水肿等方面均明显优于对照组(P<0.01)。两组治疗前CRP分别为(73.64±8.64)mg/L(、69.23±7.31)mg/L,差异无统计学意义(P>0.05);治疗后治疗组为(37.25±11.45)mg/L,对照组为(48.54±12.07)mg/L,治疗组明显低于对照组(P<0.01)。结论①纳洛酮综合治疗脑外伤效果明显。②CRP可作为颅脑外伤病情及纳洛酮治疗效果判断的参考指标。     

骨调素和单核细胞趋化蛋白在大鼠梗阻性肾病中的表达及可能作用

目的:探讨骨调素(OPN)和单核细胞趋化蛋白(MCP-1)在大鼠梗阻性模型中的表达及其在肾脏纤维化发病机制中的作用.方法:采用-单侧输尿管结扎制造梗阻性肾病模型,分别于造模后7 d、14 d取肾组织,应用HE染色观察肾脏病理改变,免疫组化方法检测肾组织畔OPN和MCP-1蛋白的表达,应用逆转录-聚合酶链式反应(RT-PCR)法观察肾组织中OPN mRNA和MCP-1 mRNA的变化.结果:OPN、MCP-1表达主要位于肾小管上皮细胞,随着梗阻时间的延长,肾组织中OPN、MCP-1蛋白和mRNA表达明显增加.结论:OPN、MCP-1蛋白和mRNA在梗阻性肾病大鼠肾组织表达明显增加介导炎症过程,参与肾间质纤维化.     

Clinical significance of urinary white blood cell count and serum C-reactive protein level for detection of non-palpable prostate cancer

AIM: The clinical significance of the urinary white blood cell (U-WBC) count and serum C-reactive protein (CRP) level was evaluated in an effort to improve the efficiency of prostate biopsies. METHODS: We enrolled 228 consecutive patients with serum prostate-specific antigen (PSA) ranging from 3.0 to 20.0 ng/mL, normal digital rectal examination findings, and who underwent prostate biopsies between January 2001 and August 2004. Of these, 157 patients had histologically confirmed benign prostatic disease and the remaining 71 patients had prostate cancer. Patients with a pretreatment U-WBC count < or =3 or >3/high power field were defined as non-pyuria and pyuria, respectively. The patients were also separated into two groups based on the serum CRP level prior to biopsy. Several clinical factors were compared among these subgroups. RESULTS: Inflammation was histologically detected at rates of 58.1% and 34.1% in the pyuria and non-pyuria groups, respectively (P = 0.0014). The rates of cancer detection were significantly lower in the pyuria, than in the non-pyuria group (P = 0.0384). The cancer detection rates did not significantly differ according to serum CRP levels prior to biopsy. CONCLUSION: The U-WBC count appears to be a reliable indicator of minute prostatic inflammation. The serum PSA level was elevated in patients with asymptomatic prostatitis. Counting U-WBC is a simple, convenient and non-invasive method that should be valuable part of routine urological examinations.     

非胰岛素依赖型糖尿病患者血清唾液酸的改变

测定20例NIDDM伴有心脑血管病变的患者、20例单纯NIDDM患者的血清唾液酸（SA）水平，并与20例正常人进行比较。结果发现所有NIDDM患者的血清SA水平均显著增高（P＜0．01），其中伴有心脑血管疾病患者的血清SA水平显著高于单纯NIDDM患者（P＜0．05），同时血清SA水平与血清胰岛素及C肽水平、收好压之间存在相关。提示血清SA水平与NIDDM患者的心脑血管疾病关系密切，可能是心脑血管并发症发生的一个危险因素。     

丙型肝炎病毒H株包膜蛋白在昆虫细胞中的表达及意义

目的　获得丙型肝炎病毒 (HCV) H株包膜糖蛋白的重组杆状病毒 ,在昆虫细胞中稳定表达包膜糖蛋白 E1和 E2 ,并初步应用于丙型肝炎患者血清抗体的检测。方法　用 PCR方法自 HCV H株扩增出包膜蛋白 E基因 ,构建重组杆状病毒 ,并在昆虫细胞中稳定表达包膜糖蛋白 E1和 E2。免疫荧光及 Western blot方法鉴定表达产物。用表达的 E1和 E2蛋白与 35例丙型肝炎患者血清反应。结果　昆虫细胞中表达的 E蛋白呈现 3种分子大小 ,E1的相对分子量为 2 1× 10 3和 33× 10 3 ,E2的相对分子量为 6 0× 10 3。在 35份感染者血清中 ,有 4例 E1抗体阳性 ,其中 1例检出 E2抗体。在 9例 PCR检测 HCV RNA阳性而抗 HCV检测阴性的血清中 ,有 3例血清与表达的 E蛋白反应。结论　 HCV E蛋白基因可在昆虫细胞中稳定表达 ,表达的 E1和 E2蛋白可用于 HCV患者的血清学诊断     

Responses of CDKs and p53 in Delayed Ischemic Neuronal Death

Stroke is a debilitating disease that affects millions each year.While in many cases cerebral ischemic in jury can be limited by effectivw resuscitation or thrombolytic treatment,the injured neurons wither in a process known as delayed neuronal death(DND).Mounting evidence indicates that DND is not simply necrosis played out in slow motion but apoptosis is triggered.Of particular interest are two groups of signal proteins that participate in apoptosis-cyclin dependent kinases(CDKs) and p53-among a myriad of signaling events after an ischemic insult.Recent investigations have shown that CDKs,a family of enzymes initially known for their role in cell cycle regulation,are activated in injured neurons in DND.As for p53,new reports suggest that its up-regulation may represent a failed attempt to rescue in jured neurons,although its up-regulation was previously considered an indication of apoptosis.These observations thus rekindle an old quest to identify new neuroprotective targets to minimize the stroke damage.In this review,the author will examine the evidence that indicates the participation of CDKs and p53 in DND and then introduce pre-clinical data to explore CDK inhibition as a potential neuroprotective target.Finally,using CDK inhibition as an example,this paper will discuss the pertinent criteria for a viable neuroprotective strategy for ischemic in jury.