白细胞介素-18逆转录病毒载体的构建及抗乙型肝炎病毒的研究

研究鼠白细胞介素－18（IL－18）基因的转移、表达及其抗乙型肝炎病毒（HBV）的作用。以逆转录聚合酶链反应（RT－PCR）技术从受植物凝血素（PHA）和脂多糖（LPS）刺激BALB/c小鼠脾脏细胞中扩增出IL－18的cDNA，并构建表达IL－8基因的重组逆转录病毒载体pLXSN-IL-18，转染PA317细胞，以逆转录巢式RT－PCR方法，验证细胞培养液上清分泌的假病毒颗粒中IL－18的表达，将假病毒颗粒感染2．2．15细胞，酶联免疫吸附法（ELISA）检测其上清HBsAg和HBeAg，定量检测HBV DNA。成功克隆出580bp的小鼠IL－18全基因并构建逆转录病毒载体，在转染PA317细胞的上清中检测出含IL－18假病毒颗粒，上清感染2．2．15细胞后第3、5、7、14天，HBsAg、HBeAg逐渐下降，到14天时HBsAg已变为阴性，对HBV DNA有明显抑制作用。IL－18能成功地在逆转录病毒载体中表达，并有抑制HBsAg、HBeAg表达的作用。     

Anti-inflammatory cytokine response and the development of multiple organ failure in severe sepsis

BACKGROUND: The production of proinflammatory cytokines activates the systemic inflammatory response in sepsis. Patients also develop a compensatory anti-inflammatory reaction, which may have an important down-regulatory effect on the overactive inflammation. However, the role of this anti-inflammatory response in sepsis is not completely clarified. In this prospective study, we investigated the relationship between the pro- and anti-inflammatory cytokine profiles in severe sepsis and their role in the development of multiple organ failure (MOF). METHODS: Thirty-eight patients meeting the criteria for severe sepsis were studied. MOF was defined as a maximum SOFA score of 10 or higher. Serial measurements of the proinflammatory IL-6 and IL-1beta and the anti-inflammatory IL-10 and IL-1ra were used. The cytokine samples were taken at the onset of sepsis and on the third and fifth day during the ICU period. RESULTS: The initial IL-10 and IL-1ra responses were identical in patients with or without MOF. The anti-inflammatory cytokine levels remained elevated in the MOF patients, whereas in patients without MOF the levels declined. The IL-6/IL-10 ratio was significantly higher in the MOF patients on days 1 and 3 compared with patients without MOF. CONCLUSIONS: We could not demonstrate overproduction of anti-inflammatory IL-10 in MOF patients. On the contrary, the high IL-6/IL-10 ratio indicates that IL-10 deficiency may contribute to the development of MOF in severe sepsis.     

Effect of probiotics on respiratory,gastrointestinal and nutritional outcomes in patients with cystic fibrosis: A systematic review

Background

An increasing body of research investigating the use of probiotics to improve health outcomes in patients with cystic fibrosis (CF) prompted the need to systematically assess and summarise the relevant literature.

Bilateral sympathectomy improves postinfarction left ventricular remodeling and function

Objectives

To evaluate the influence of bilateral or left sympathectomy on left ventricular remodeling and function after myocardial infarction in rats.

Evaluation of interleukin-6 and interleukin-10 in lung transplant patients with human cytomegalovirus infection

Abstract:  We hypothesized that interleukin-6 (IL-6) in plasma and bronchoalveolar lavage (BAL) might serve as additional diagnostic parameter in lung transplant patients with human cytomegalovirus (HCMV) infection. Therefore, we compared IL-6 levels in HCMV-positive vs. HCMV-negative patients. IL-6 was measured by ELISA in plasma and BAL in 111 patients. Furthermore, we investigated the influence of IL-10 on IL-6 production in HCMV-positive patients. For HCMV–DNA detection in plasma and BAL a quantitative polymerase chain reaction (PCR) assay was used. IL-6 levels were significantly higher in the HCMV-positive group (n = 39; BAL p = 0.045; plasma p = 0.017) in comparison to the HCMV-negative group (n = 72). IL-10 did not correlate with IL-6 concentration (p = 0.146). Donor (D) or recipient (R) HCMV-constellation did not influence IL-6 concentration. IL-6 levels were not influenced by elevated levels of HCMV copies. Our data suggest that IL-6 does not serve as a good diagnostic parameter for existence of HCMV infection in lung transplant patients. Because of the wide range of the IL-6 levels in both groups, we were not able to find a breakpoint differentiating between infected and not-infected patients. Another important finding was that IL-6 production is not dependent of the HCMV status of D/R.     

促炎因子在低龄化脓性脑膜炎患儿病情严重程度及预后中的应用价值

目的探讨4种促炎因子在低龄化脓性脑膜炎（purulent meningitis,PM）患儿早期诊断、病情评估和预后中的价值。 方法选取2岁以下的PM患儿25例,其中普通PM组17例,重症PM组8例,同时选取对照组18例,入院后12 h内采集脑脊液（cerebrospinal fluid,CSF）和血液。应用酶联免疫吸附剂测定法测定CSF和血清中肿瘤坏死因子α（tumor necrosis factor-α,TNF-α）、白细胞介素（interleukin,IL）1β、IL-6和IL-8的浓度。随访6个月,评估患儿的预后情况。 结果CSF IL-6和CSF IL-8诊断小儿PM的受试者工作特征(receiver operating characteristic,ROC)曲线的曲线下面积（area under curve,AUC）分别为0.932和0.916,其诊断效能高于其他指标。重症PM组CSF中TNF-α、IL-1β、IL-6和IL-8水平均高于普通PM组的水平（P＜0.05）,普通PM组CSF促炎因子水平高于对照组（P＜0.05）。在区分普通PM和重症PM的ROC曲线中,CSF TNF-α的AUC最大,当CSF TNF-α取截断值为70.4 ng/L时,其区分重症PM的敏感度为100%、特异度为94.1%。预后不良组CSF IL-6水平显著高于预后轻度不良组,预后轻度不良组CSF IL-6水平明显高于预后良好组（P＜0.05）。 结论CSF中的IL-6和IL-8可作为低龄儿童PM的早期辅助诊断指标。CSF中TNF-α水平有助于反映低龄儿童PM病情的严重程度。CSF中IL-6水平可能对PM患儿的远期预后有一定的预测作用。     

慢性乙型肝炎患者TNF-α和IL-6的变化及双利肝对其影响

目的探讨TNF-α、IL-6在慢性乙肝不同阶段的作用及双利肝对于两种细胞因子的影响.方法 55 例慢性乙肝患者在治疗前测定血清TNF-α、IL-6水平及肝功能.在一般保肝治疗基础上口服双利肝,在治疗前后测定血清TNF-α、IL-6水平及肝功能.结果随着肝功能损害加重,TNF-α、IL-6水平显著升高(P＜0.01,P＜0.05),经过双利肝治疗,患者转氨酶、胆红素、TNF-α水平明显下降(P＜0.01),IL-6水平略有上升但无显著性差异(P＞0.05).结论慢性乙肝病程中,TNF-α与肝细胞坏死程度有关,可作为病情轻重的判别指示.IL-6与肝脏损伤过程有关.双利肝可明显降低慢性乙肝患者TNF-α水平,有效地改善肝功能.     

亚低温治疗对急性脑卒中患者血清IL-2、IL-6、α-TNF的影响

目的: 探讨亚低温治疗对急性脑卒中患者血清IL-2、IL-6、α-TNF的影响和临床意义。方法: 将36例脑卒中患者随机分为亚低温治疗和常规治疗组,检测入院第1天(d₁)、第3-5天(d_3-5)、第14天(d₁₄)血清IL-2、IL-6、α-TNF的水平,进行对照比较。记录患者第14天的美国国立卫生院神经功能评分(NIHSS)和病死率。结果: 两组患者d₁、d_3-5、d₁₄血清IL-2、IL-6、α-TNF的水平均高于正常组(P<0.01),亚低温治疗组d_3-5、d₁₄血清IL-2和IL-6的水平均低于同期常规治疗组(P<0.01和P<0.05)。亚低温治疗组第14天的NIHSS明显低于常规治疗组(P<0.001)。两组的病死率分别为31.3%和45.0%,差异无统计学意义(P>0.05)。结论: 亚低温治疗可以降低急性脑卒中患者血清IL-2、IL-6的水平,抑制卒中后炎症反应,保护脑神经细胞。