大鼠骨髓间充质干细胞转染人TH基因的实验研究

目的评价酪氨酸羟化酶(tyrosine hydroxylase,TH)基因修饰骨髓间充质干细胞(mesenchymalstem cells,MSCs)后TH的表达情况及转染TH基因对MSCs的影响.方法构建含人TH基因的pCMV/hTH质粒,用脂质体转染原代培养的大鼠MSCs;Western blot及免疫细胞化学染色鉴定TH基因的表达及MSCs的分化情况;MTT比色法测定转染后的MSCs细胞活性,并与未转染的MSCs进行细胞活性比较.结果构建的pCMV/hTH质粒经ECoRI酶切后产生1.9okb和5.3kb的片段,与回收的目的基因及载体基因片段大小相符;转基因后的MSCs Western blot及免疫细胞化学染色显示TH染色阳性;转染后MSCs未见有NeuN,GFAP的表达;MTT比色法测定细胞活性,未转染与转染者差异无显著性.结论构建的TH基因能在体外培养的鼠MSCs中较好的表达,转染不会诱导MSCs向神经样细胞分化,对MSCs细胞活性无明显影响.     

大鼠心肌缺血再灌注时心肌细胞凋亡caspase-3活性变化规律及药物对其影响

目的　探讨大鼠心肌缺血再灌注 (Ischemiareperfusion ,IR)不同时相的心肌细胞凋亡、caspase 3活性变化规律及caspase 3抑制剂Ac DEVD CHO的影响。方法　Wistar大鼠 12 2只 ,设立IR组 ,IR +Ac DEVD CHO组和假手术对照组并分设缺血 3 0min后再灌注 1、3、6、12、2 4h 5个时相点 ;以缺口末端标记法 (TUNEL)标记凋亡细胞 ,用荧光分析法检测caspase 3活性 ,行TTC染色测定心肌梗死范围。结果　心肌细胞凋亡与caspase 3活性随心肌再灌注不同时相而变化 ,心肌细胞凋亡指数 (Apoptosisindex ,AI)与caspase 3活性于再灌注 12h最高 [AI :( 3 4 83± 9 3 5 ) % ;caspase 3活性 :( 1 3 4±0 2 ) ] ,其后基本维持在平台状态 ;心肌梗死范围随IR时间逐渐增加 ,至 2 4h仍未见下降趋势 ,三者间呈显著正相关 (P <0 0 5 )。IR +Ac DEVD CHO组上述指标虽也明显增高 ,但比IR组明显减小 (P <0 0 5 )。结论　Caspase 3激活及心肌细胞凋亡参与了心肌缺血再灌注损伤过程 ,Ac DEVD CHO减轻心肌缺血再灌注损伤可能部分与其抑制心肌细胞凋亡有关。     

股骨转子间骨折GAMMA钉治疗临床分析

目的：评价GAMMA钉治疗股骨转子间骨折的效果。方法：对32例股骨转子间骨折采用GAMMA钉治疗。结果：经6～18月随访，所有病例均获骨性愈合，下肢功能及关节活动良好。其中1例为粉碎性骨折内固定后出现髋内翻，按X线评分标准90％病人满意。结论：GAMMA钉治疗股骨转子间骨折效果满意。     

Synthesis, biodistribution and quantitative structure-activity relationship studies of new 99mTc labeled pseudo-peptide complexes.

Twelve new peptide or pseudo-peptide chelators have been synthesized in the course of our continuing investigation of 99mTc-labelled peptides for application for renal imaging agents. All compounds were characterized on the basis of, IR, 1HNMR, 13CNMR spectroscopy, as well as MS and elemental analysis. All peptides yield stable 99mTc complexes using Sn(II) reactive coupling and exhibit renal uptake. Linear regression analysis between Logarithm of renal uptake value (RU) and the parameters obtained by the ZINDO/1 method was performed. Some equations were obtained which showed that molecular polar and charge have some relationship with their renal uptake.     

关木通引起慢性间质性肾炎7例报告

目的　观察关木通所致慢性肾损伤的临床和病理改变特点。方法　本组 7例中 ,男 5例 ,女 2例。 3例服关木通汤药 ,4例服含关木通成药。分析服用时间、累积总量与肾损害首发症状及症状出现时间、肾功能和肾病理改变的关系。结果　汤药组 :服药时间平均 3 3 3个月 ,累积总量平均 82 9 3 g ,首发症状为乏力 3例 ,夜尿增多 2例 ,平均时间为 8 3个月 ,Cr平均 40 2 μmol/L。肾病理 :3例均为重度寡细胞性肾间质纤维化 ,肾小管广泛萎缩。成药组 :服药时间平均 7 5个月 ,累积总量平均 13 6g ,乏力 3例 ,夜尿增多 1例 ,恶心呕吐、头痛头晕 1例 ,平均18 8个月 ,Cr 3 62 8μmol/L。肾病理为重度寡细胞性间质纤维化和灶状纤维化各 2例 ,肾小管灶状萎缩 3例 ,广泛萎缩 1例。结论　汤药组关木通积累大 ,发病时间早 ,肾病理改变重。提示关木通所致肾损其临床表现、病理改变与服用关木通时间、剂量相关。     

Comparison of Minimum Alveolar Concentration between Intravenous Isoflurane Lipid Emulsion and Inhaled Isoflurane in Dogs

Background: As in inhaled isoflurane anesthesia, when isoflurane lipid emulsion (ILE; 8%, vol/vol) is intravenously administered, the primary elimination route is through the lungs. This study was designed to determine the minimum alveolar concentration (MAC) and the time course of washout of isoflurane for intravenously infused ILE by monitoring end-tidal isoflurane concentration.

Methods: Twelve healthy adult mongrel dogs were assigned randomly to an intravenous anesthesia group with 8% ILE or to an inhalation anesthesia group with isoflurane vapor. An up-and-down method and stimulation of tail clamping were used to determine MAC of 8% ILE by intravenous injection in the intravenous anesthesia group and MAC by the inhaled approach in the inhalation anesthesia group, respectively. Isoflurane concentration and partial pressure in end-tidal gas, femoral arterial blood, and jugular venous blood were measured simultaneously just before each tail clamping and during washout.

Results: The induction time in the intravenous anesthesia group (105 +/- 24 s) was shorter than that in the inhalation anesthesia group (378 +/- 102 s; P < 0.01). MAC of 8% ILE by intravenous injection (1.12 +/- 0.18%) was significantly less than MAC by the inhaled approach (1.38 +/- 0.16%; P < 0.05). No significant difference was found between the two groups in the time course of washout of isoflurane.     

民营医院品牌建设:"奇正之法",成功之本

与公立医院相比,民营医院更注重经营,更注重服务,更关注盈利。因此,高水平的服务质量、人性化的服务环境、便捷温馨的服务流程、强势品牌形象就是民营医院竞争制胜的法宝。     

增溶分光光度法测定人发中铝

目的：建立一种测定人发中铝的新方法。方法：以铬天青S－溴化十六烷基三甲铵为表面活性剂增溶分光光度法测定人发中铝。结果：方法检出限为0.006μg/ml，相对标准偏差小于1．3％，加标回收率在91％－104％之间。结论：方法简便，不需要特殊仪器，易于推广使用。     

Parental influences on young girls’ fruit and vegetable, micronutrient, and fat intakes

Objective To evaluate parents’ fruit and vegetable intake and their use of pressure to eat in child feeding as predictors of their 5-year-old daughters’ fruit and vegetable, micronutrient, and fat intakes.Subjects Data were obtained from 191 non-Hispanic white families with 5-year-old girls.Design Parent data included reports of pressure in child feeding and their own fruit and vegetable intake. Girls’ intakes of fruits and vegetables, selected micronutrients, and fat were the main outcomes of interest.Statistical analysis Structural equation modeling was used to test a model describing relationships among parents’ fruit and vegetable intake, parents’ use of pressure in child feeding, and daughters’ fruit and vegetable, micronutrient, and fat intakes.Results The model provided a good fit to the data, revealing that girls’ fruit and vegetable intake was positively related to their parents’ reported fruit and vegetable intake. Parents who consumed fewer fruits and vegetables tended to report greater pressure in child feeding and had daughters who consumed fewer fruits and vegetables. Girls’ reported fruit and vegetable intakes were positively related to their micronutrient intakes and negatively associated with fat intake.Applications/conclusions This research demonstrates that parents’ own fruit and vegetable intake may encourage fruit and vegetable intake in their daughters, leading to higher micronutrient intakes and lower dietary fat intakes. Conversely, pressure to eat may discourage fruit and vegetable intake among young girls. J Am Diet Assoc. 2002;102:58–64.