不同致伤条件撞击对兔钝性胸部创伤伤情影响的实验研究

探讨不同致伤参数对兔钝性胸部创伤后胸部筘器官伤情的影响。方法采用兔钝性胸部创伤型,设置不同的致伤参数,观察其对胸部各器 伤情影响及其对死亡率的影响。结果驱动压力越大,胸部各器官伤情越重;撞击面积越大,对胸壁和肺的损伤较重,但心脏伤情并不随之加重;收缩末期撞击对心脏的损伤较重,舒张末期撞击大血管系统的影响较大,死亡率与驱动压力、撞击面积成正;舒张末期撞击死亡率上升。结论致伤参数不同,对钝化胸部创伤后     

急性脑梗塞的红细胞膜流动性及生化指标改变

目的 探讨急性脑梗塞（ＡＣＩ）的发病机制及治疗措施。方法 采用测定ＡＣＩ患者血浆粘度,纤维蛋白原含量,红细胞膜荧光偏振度Ｐ,过氧化脂质水平,超氧化物歧化酶活性等指标进行对比研究。结果 与同龄健康组比较,ＡＣＩ患者ηｐ,Ｆｇ,ＬＰＯ水平均显著升高,ＳＯＤ活性显著降低。红细胞膜流动性下降。     

单臂多功能外固定支架治疗不稳定性胫腓骨骨折

目的 评估单臂多功能外固定支架治疗不稳定性胫腓骨骨折的疗效。方法 使用单臂多功能外固定支架治疗不稳定性胫腓骨骨折４２例。结果 骨折均愈合,患肢功能恢复良好,愈合平均时间６．２个月。钉道感染率１２％。结论 单臂多功能外固定支架可纵轴方向滑动,起延长加压作用,两端有球状万向关节,可做各方向调节,使用灵活和容许早期活动。单臂多功能外固定支架是治疗不稳定性胫腓骨骨折较好的方法。     

新药Ⅰ期临床耐受性试验中不良事件的评价方法

目的：对新药Ⅰ期临床耐受性试验中不良事件监察的指标、评价方法、结果判定进行探讨。方法：通过对盐酸丙哌维林、两种格列美脲等三种新药单剂量口服的Ⅰ期临床耐受性试验,观察、分析其不良事件。结果：此三种新药在常规口服剂量时,有良好的耐受必性,仅有部发患出现轻度药物不良反应。结论：新药Ⅰ期临床耐受性试验中不良事件评价对发现新药不良反应苗头具有重要意义。     

Naringenin inhibited migration and invasion of glioblastoma cells through multiple mechanisms

Glioblastoma (GBM) is the most mortality brain cancer in the world. Due to high invasion and drug resistance cause the poor prognosis of GBM. Naringenin, an ingredient of citrus, exhibits many cellular functions such as antioxidant, anti‐inflammation, and anticancer. Naringenin inhibits the migration of bladder and lung cancer via modulation of MMP‐2 and/or MMP‐9 activities, Naringenin inhibits migration and trigger apoptosis in gastric cancer cells through downregulation of AKT pathway. However, the effects of naringenin in GBM still remain to be elucidated. In this study, we reveal the molecular mechanisms of naringenin in the inhibition of migration and invasion in GBM. No overt alternation of cell proliferation was found in of GBM 8901 cells treated with different concentration of naringenin. Slight decreased cell viability was found in GBM 8401 cell treated with 200 and 300 μM naringenin. Significant reduction of migration and invasion as assayed by Boyden chamber analysis was found in of GBM cells treated with 100, 200, and 300 μM naringenin. Zymography analysis also revealed that the activities of MMP‐2 and MMP‐9 of GBM cells were significantly inhibited in response to 100, 200, or 300 μM naringenin treatment. Proteins of MMP‐2 and MMP‐9 were downregulated in naringenin treated GBM cells. In addition, naringenin also attenuated the activities of ERK and p38. Naringenin decreased mesenchymal markers (snail and slug) expression as revealed by Western blot analysis. Taken together, our findings indicated that naringenin eliminated the migration and invasion of GBM cells through multiple mechanisms including inhibition of MMPs, ERK, and p38 activities and modulation of EMT markers. Our results also suggested that naringenin may be a potential agent to prevent metastasis of GBM.     

Response‐adaptive treatment allocation for survival trials with clustered right‐censored data

A comparison of 2 treatments with survival outcomes in a clinical study may require treatment randomization on clusters of multiple units with correlated responses. For example, for patients with otitis media in both ears, a specific treatment is normally given to a single patient, and hence, the 2 ears constitute a cluster. Statistical procedures are available for comparison of treatment efficacies. The conventional approach for treatment allocation is the adoption of a balanced design, in which half of the patients are assigned to each treatment arm. However, considering the increasing acceptability of responsive‐adaptive designs in recent years because of their desirable features, we have developed a response‐adaptive treatment allocation scheme for survival trials with clustered data. The proposed treatment allocation scheme is superior to the balanced design in that it allows more patients to receive the better treatment. At the same time, the test power for comparing treatment efficacies using our treatment allocation scheme remains highly competitive. The advantage of the proposed randomization procedure is supported by a simulation study and the redesign of a clinical study.     

还原叶酸载体基因多态性及母亲增补叶酸与神经管缺陷风险之间的关系

神经管缺陷（neural tube defects,NTDs）是最常见的致死、致残性出生缺陷之一,在中国北方地区尤其高发。已经证明,妇女围受孕期增补叶酸可以大大降低胎儿NTDs的风险。此外,与叶酸代谢有关的酶的基因多态性通过影响叶酸或同型半胱氨酸代谢,从而增加个体NTDs的易感性。     

老年冠心病患者血脂与胆红素水平的研究

目的探讨血脂水平及血清胆红素与冠心病的关系。方法96例经临床确诊的老年冠心病患者为观察组,82例老年健康体检者为对照组,采用全自动生化分析仪检测血脂水平及血清胆红素浓度。结果观察组的血清总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)水平高于对照组,差异有统计学意义;而血清高密度脂蛋白胆固醇(HDL-C)、总胆红素(TB il)、直接胆红素(DB il)、间接胆红素(IB il)均低于对照组,差异有统计学意义。结论老年冠心病患者血脂水平较高,而血清胆红素水平较低,提示高血脂及低水平胆红素是冠心病发病的危险因素。     

脑卒中合并吞咽困难早期肠内营养治疗实施模式的效果及护理

[目的]探讨脑卒中合并吞咽困难患者早期应用不同肠内营养的效果及营养支持对患者康复的影响.[方法]42例脑卒中合并吞咽困难患者随机分为治疗组(A组)、对照组(B组),分别于入院72 h内给予:对照组(B组)普通营养制剂牛奶分次胃管注入,治疗组(A组)以瑞素作为肠内营养制剂,连续性经泵滴注,入院3周末测量两组病人多项营养指标,同期观察并发症腹胀、腹泻、应激性溃疡、吸入性肺炎、死亡发生人数(发生率). [结果]3周末A组各营养指标高于B组,差异有统计学意义(P<0.05),A组各并发症出现数低于B组,其中应激性溃疡、腹胀、腹泻、吸入性肺炎人数(发生率) (P<0.05),死亡发生人数(发生率)差异无开统计学意义(P>0.05). [结论]脑卒中合并吞咽困难患者早期应用标准营养制剂连续性经泵滴注肠内营养支持,可改善机体的营养状况,有利于病人的康复.     

羊红膻中新化合物──羊红膻醇的分离和鉴定

从陕西草药羊红膻Pimpinellathellungiana全草的正丁醇部分分得一个环乙烯类化合物（Ⅰ）和一个环乙醇类化合物（Ⅱ），经化学及光谱分析鉴定Ⅰ为3，4，5－trihydroxy－1－cyclohexene－1－carboxylicacid，即莽草酸（shikimicacid），Ⅱ为1－butyl－3，4，5－trihydroxy－cyclohexanol。Ⅰ为从该植物中首次得到，Ⅱ为一新化合物，定名为羊红膻醇（thellungianol）。