重组2型腺相关病毒-转化生长因子β3对实验性肝纤维化大鼠肝脏组织病理学和Ⅰ型胶原表达的影响

Objective To investgate the effects of TGF β 3 on rat hepatic fibrosis. Methods The TGF β 3 cDNA was cloned into rAAV2 vector. Rats were randomly divided into four groups: normal control group, model group, negative control group and TGF β 3 group. Hepatic fibrosis was induced by hypodermic injection of 40% CCI4. Recombinant AAV2-TGF β 3 viral particles were injected via the vena caudalis one week before CCh treatment. Rats were executed 8 weeks after CCI4 treatment, global histological change was observed after HE staining, the distribution of the collagen fibers was observed after masson staining, his-tochemistry was done to observe the expression of collagen Ⅰ; The positive area rate of the collagen fibers and the average optical rate of collagen Ⅰ were quantified. Results HE staining indicated that collagen fibers were reduced in the TGF β 3 group. Masson staining shown that the collagen fibers were distributed around the blood vessel, in the portal area and disse space. Compared to the model group (13.2%±2.2%) and negative control group (12.3%±1.5%), the collagen fibers in liver tissues of TGF β3 group (7.7% ± 1.5%) were significantly decreased (q = 9.456, P < 0.01; q = 8.217, P < 0.01). Histochemistry indicated that the collagen fibers of liver tissues of TGF 15 3 group (0.185±0.033) were significantly higher than those in the model group (0.252±0.042) and the negative control group (0.230±0.029), (q = 6.228, P < 0.01; q = 4.346, P < 0.01). Conclusion TGF β 3 alleviates the damage to hepatic cell and the level offibrosis in CCI4 treated rats and inhibits the expression of collagen Ⅰ.     

How Long Can Hair Follicle Units Be Preserved at 0 and 4°C for Delayed Transplant?

BACKGROUND: Preservation of hair follicle units for the purpose of delayed transplant will help us graft thousands of hair grafts at one session, even in a clinic with fewer assistants and less equipment. OBJECTIVE: This study was undertaken to evaluate and compare the viability of hair follicle units preserved at 0 and 4 degrees C for various periods. MATERIALS AND METHODS: Cell cultures and transplant of hair follicle units into athymic mice were performed. RESULTS: Outer root sheath cells could be cultivated in 96% (0 degrees C group) and 92% (4 degrees C group) of the hair follicles after 24 hours of preservation, whereas 85% (0 degrees C group) and 79% (4 degrees C group) of the follicles implanted into the mice regrew well after the same period of preservation. Then, in both the 0 degrees C and the 4 degrees C group, these rates decreased significantly with length of preservation in cell cultures and mice transplant; however, 0 degrees C seems better than 4 degrees C for preservation of grafts (p<.05). CONCLUSION: Grafts are better preserved at 0 degrees C instead of 4 degrees C. When delayed transplant is an option, it should be completed within 24 hours and no later than 48 hours.     

SPECT/CT同机图像融合诊断股骨头缺血性坏死

目的 评价SPECT/CT同机图像融合技术诊断股骨头缺血性坏死的临床应用价值.方法 53例临床可疑股骨头缺血性坏死患者行全身骨显像及骨盆局部SPECT/CT断层显像并对SPECT和CT同机图像进行重建与融合.结果 ①融合图像诊断阳性率高于断层图像及平面图像,差异具有显著性;②融合图像对早期病变诊断阳性率高于断层显像及平面显像,差异具有显著性.结论 SPECT/CT同机图像融合技术对于股骨头缺血性坏死的早期诊断、鉴别诊断及疾病分期均有一定的临床价值.     

大鼠正畸牙移动过程中胰岛素样生长因子-Ⅰ(IGF-Ⅰ)在牙周膜中的表达

目的:观察大鼠正畸牙周膜改建过程中胰岛素样生长因子-Ⅰ(IGF-Ⅰ)在牙周膜中的表达变化,探讨IGF-Ⅰ与正畸牙齿移动的关系.方法:在大鼠上颌第一磨牙与上颌切牙之间安装正畸装置,于牙齿移动3,7,14,21, 28d后取材分别进行HE和免疫组化染色.结果:IGF-Ⅰ于牙齿移动3d后在牙周膜中表达开始增强,张力侧7d达到高峰,压力侧14d达到高峰,以后表达逐渐降低.结论:IGF-1参与了正畸牙周膜改建过程.     

多层螺旋CT对不同肝叶血流动力学的比较研究

目的研究肝动脉和门静脉在不同肝叶的血流分配情况。方法选择能在同一CT横断面内同时显示肝左内叶、左外叶,肝右前叶、右后叶及门静脉主干或左右主支的健康成人30例,行CT灌注扫描,去卷积算法计算血流动力学参数:肝灌注指数(HPI)、肝血流量(HBF)、肝血容量(HBV)、平均通过时间(MTT)。所得结果按不同肝叶分组,进行方差分析。统计软件为SAS6.12,检验水准α=0.05。结果肝左、右叶的血流灌注指数有显著性差异;右前叶与右后叶、左内叶与左外叶灌注指数无明显差异;合并肝右前、后叶;肝左内、外叶得:肝左叶灌注指数为31.75%±5.28%,肝右叶灌注指数为5.2%±0.96%,两者有显著性差异(Ρ<0.05),HBF、HBV、MTT在不同肝叶无显著性差异。结论肝左叶的灌注指数明显高于肝右叶:肝左叶的动脉供血比例明显大于肝右叶。     

开展药学信息学课程教学的必要性和方法探讨

目的：探讨药学高等教育中开设药学信息学课程的必要性和可行性。方法：通过剖析药学信息学的原理和内容，分析国内药学信息学教育的现状，提出开展药学信息学教育的方法。结栗：药学信息学教育是药学发展和高等教育改革的要求，开展药学信息学教育必须编写系统的专业教材，并注重培养学生的自我运用信息和处理信息的能力。结论：开展药学信息学教育是必要和迫切的。     

异黄酮衍生物的合成Ⅱ.7-氯和6-氯-7-甲氧基-3′-(N,N-二乙胺甲基)-4′-羟基异黄酮的合成

合成了7-氯和-6-氯-7-甲氧基-3′-(N,N-二乙胺甲基)-4′-羟基异黄酮(1478和1481)。它们的合成是由间-氯苯酚或3-羟基-4-氯苯酚与对-硝基苯乙酰氯反应,制得取代的脱氧安息香。它们与原甲酸乙酯环合得到取代的-4′-硝基异黄酮,再将化合物中的硝基用锌粉还原成氨基,再经重氮化和水解,得到取代的-4′-羟基异黄酮。它们经Mannich反应,最后制得7-氯和6-氯-7-甲氧基-3′-(N,N-二乙胺甲基)-4′-羟基异黄酮。它们耐氧作用不如已合成的7-甲氧基-3′-(N,N-二烷胺甲基)-4′-羟基异黄酮。     

上海市区居民高血压药物治疗概况的横断面调查

本文报告上海市区三个中等生活水平居民区中５４０例３５岁以上高皿压患者药物治疗概况。结果显示，高血压患者中有１３．Ｏ／不知自己有高血压，而已知有高血压者中仅５０％规则服用降压药，其中３０．８％患者的血压得到控制。５４Ｏ例高血压患者总的血压控制率仅为２０％。导致血压控制率低的原因之一是患者服药依从性低。就以上发现的意义作了讨论。     

高脂血清对人内皮细胞前列环素、脂质过氧化物的影响及维生素E的保护作用

实验比较了高脂兔血清（ＨＲＳ）和正常兔血清（ＮＲＳ）对培养的人脐静脉内皮细胞（ＥＣ）脂质过氧化物（ＬＰＯ）的形成和ＥＣ利用外源性花生四烯酸（ＡＡ）合成前列环素（ＰＧＩ２）能力的影响；同时观察了抗氧化剂ＶｉｔＥ对ＥＣ的保护作用。结果表明，ＨＲＳ对ＥＣ合成ＰＧＩ２的影响有一时间和浓度相关的反应过程。用ＨＲＳ孵育培养呈融合状的ＥＣ，在４８ｈ前刺激ＰＧＩ２的产生，４８ｈ达最高值，然后急骤下降；而ＬＰＯ含量随着孵育时间的延长呈直线上升（ｒ＝０．９８７）。随着ＨＲＳ浓度的增加，ＬＰＯ含量逐渐升高，ＥＣ合成ＰＧＩ２能力呈下降趋势。ＶｉｔＥ可阻止ＨＲＳ引起的ＥＣ中ＬＰＯ含量的增加和ＰＧＩ２合成能力的下降。     

不同时辰刺激大鼠的交叉上核对血浆中皮质酮含量的影响

应用拉丁方设计，在不同体重组的大鼠，于不同时辰，对交叉上核采取不同强度的刺激，用放射免疫法测定外周血中皮质酮的含量。其结果显示：各体重组间无显著性差异，不同时辰血浆皮质酮的平均含量各组呈现基本相同的节律性变化，无论何时辰刺激交叉上核使之兴奋，均可显著提高血浆皮质酮的含量。完全损毁交叉上核后７２小时血浆皮质酮含量和正常对照组无显著性差异，且其节律性也没有出现明显变化。