Effects of basic fibroblast growth factor on biological characteristics of osteoblasts

Objective: To elucidate the effects of exogenous basic fibroblast growth factor ( bFGF ) on biological characteristics of rat osteoblasts cultured in vitro. Methods: The osteoblasts isolated from a Sprague-Dawley rat and cultured in vitro were treated with different concentrations of bFGF ( 5-50 ng/ml) respectively. At 24 hours after treatment, the proliferating cell nuclear antigen was measured with immunocytochemistry, alkaline phosphatase (ALP) activity was determined and the expression of transforming growth factor beta 1 ( TGF-β1 )was detected to observe the effects of bFGF on growth and differentiation of osteoblasts. Resu/ts: bFGF ( 5-50 ng/ml ) could obviously promote the growth of osteoblasts. The intracellular expression of TGF-β1 mRNA increased significantly, but the intracellular ALP content decreased. Conclusions: bFGF can obviously stimulate the proliferation of osteoblasts and promote the synthesis of TGF-β1, but cannot promote the differentiation of osteoblasts.     

特布他林对海水淹溺型肺水肿兔肺组织炎症反应的抑制作用

目的探讨特布他林对海水淹溺型肺水肿兔肺组织炎症反应的影响。方法36只机械通气的麻醉新西兰兔随机分成正常组（N组）、对照组（C组）和特布他林治疗组（T组）。C组和T组经颈动脉注入4ml／kg的配方海水，20min后C组经颈动脉注入2ml生理盐水，而T、组则注入0．15mg／kg特布他林，N组除未注入配方海水外，其余处理同C组。观察肺泡灌洗液（BALF）中TNF-α计量和中性粒细胞计数，取部分右下肺常规病理学检查，并分别用RT-PCR和ELISA检测肺组织中TNF-α、IL-1β和IL-8的mRNA表达及蛋白含量。结果病理学观察显示C组的肺组织内有大量的炎性细胞浸润，肺泡隔断裂、肺泡破裂、相互融合、肺泡大量萎陷，肺泡内有出血及透明膜形成。T组的上述改变轻于C组。T组肺组织内TNF-α、IL-1β和IL-8的mRNA表达及蛋白含量均显著低于C组（P〈0．05），BALF中TNF-α和中性粒细胞计数减少。结论特布他林可以抑制海水淹溺型肺水肿兔肺组织的TNF-α、IL-1β和IL-8，从而减轻肺组织炎症反应。     

肾癌患者组织蛋白酶B检测的临床意义

目的　观察组织蛋白酶B在肾癌癌组织中的表达 ,探讨其临床应用价值。方法　应用免疫组化技术测定组织蛋白酶B在肾癌患者癌组织和癌周组织中阳性的表达。结果　癌组织中组织蛋白酶B平均标记指数在癌组织较癌周组织明显增高 ,两者之间有高度显著性差异 (p <0 .0 0 1 )。结论　组织蛋白酶B在癌组织中表达增强表明 ,组织蛋白酶B与肾癌恶性表现相关 ,是肾癌患者临床监测有效指标     

踝部旋前外展Ⅲ度骨折三种治疗方法的远期疗效比较

目的:探讨手法整复夹板固定和切开复位内固定对踝部旋前外展Ⅲ度骨折的治疗效果及优缺点。方法:不同时期的171例踝部旋前外展Ⅲ度骨折分别应用手法整复夹板固定、切开复位松质骨螺丝钉加三棱髓内针内固定石膏外固定、切开复位张力带钢丝内固定三种方法进行治疗。结果:经2-16年,平均8.4年的随访,手法整复组优良率为39％;松质骨螺丝钉加三棱髓内针内固定石膏外固定组优良率为65％;张力带钢丝内固定组优良率为90％。三种方法疗效差异有显著性意义(P<0.05)。结论:张力带钢丝内固定对踝部旋前外展Ⅲ度骨折是一种较为理想的治疗方法。     

减压后脑肿大早期磁共振弥散加权像和病理的实验研究

目的：探讨减压后脑肿大早期病理基础。方法：利用磁共振弥散加权成像（DWI）对脑水肿检测的敏感性和特异性，于减压后2h、4和6h三个时点，对18只猫作减压后脑肿大动脉DWI检查，每相应时点处死6只猫形成一组，制取脑标本作Evan‘s Blue染色、光镜和电镜检查。结果：减压后2hDWI即显示脑肿大部位为低强度信号区，其范围在减压后4和6h明显扩大，中线向对侧移位加剧；1只猫减压后6h肿大部位原低强度信号区转变为高强度信号区。减压后2h即见脑肿大部位Evan‘s Blue染色，减压后4和6h染色范围明显扩大。减压后2h光镜和电镜检查发现全脑微小血管内淤血，但以脑肿大部位为重并伴有微小血管周围间隙明显扩大；减压后6h肿大脑组织内变性坏死脑细胞增多。结论：减压后脑肿大早期（＜2h)由充血性脑肿胀和血管源性脑水肿共同构成，6h则可能有细胞毒性脑水肿发生。     

大鼠小肠上皮细胞的体外原代培养

目的：探讨大鼠小肠上皮细胞原代培养的原理与方法以及培养过程中常见的问题和克服办法。方法：取生后1周SD大鼠的小肠上皮细胞，经分离纯化后进行原代培养。结果与结论：胶原酶Ⅺ型和中性蛋白酶Ⅰ型配合使用，可以分离到形态完整、容易贴壁生长的小肠绒毛细胞团。进一步利用离心技术纯化得到95％以上的小肠上皮细胞。结果显示，常规体外培养的肠上皮细胞是否增殖分化最终决定于用酶消化后的结构完整性，如果用0．25％胰酶消化，则细胞受损程度较大，不易贴壁生长。     

大型垂体生长激素腺瘤合并重型糖尿病的临床治疗

目的 探讨垂体生长激素腺瘤并发重型糖尿病的临床治疗方法和效果。方法 收治6例大型垂体生长激素腺瘤合并重型糖尿病病人，首先给予大剂量胰岛素控制血糖，待血糖降至10mmol/L左右时手术行肿瘤次全切除，术后常规放疗，DT：50Gy。结果 本组6例病人术后胰岛素所需剂量即明显下降。其中5例获随访0．6～6年，平均随访时间4．5年，均已恢复正常工作，停用任何降糖药物。血糖尿糖复查正常。结论 对大型生长激素腺瘤合并重型糖尿病的病人，积极手术切除肿瘤并辅以放疗是一种迅速有效的治疗选择。     

温血高钾间断灌注心肌保护的临床应用

目的　探讨浅低温体外循环 (CPB)温血间断灌注心肌保护的临床效果。方法　全组随机分为对照组 (A组 )6 8例 ,采用浅低温CPB温血高钾持续灌注心肌保护。实验组 (B组 ) 91例 ,采用浅低温CPB温血高钾间断灌注心肌保护。观察两组术中心肌保护效果的差别。结果　CPB时间、主动脉阻断时间B组明显小于A组 (P <0 .0 5 ) ;库血用量和 2 4h胸腔引流量B组明显少于A组 (P <0 .0 5 ) ;主动脉开放前血钾浓度B组明显低于A组 (P <0 .0 5 ) ;主动脉开放后心脏自动复跳率B组明显高于A组 (P <0 .0 5 ) ;术后心功能临床观察两组无显著差异。结论　浅低温CPB温血高钾间断灌注保护心肌效果良好。     

阿片受体在异氟醚延迟预处理减轻兔心肌缺血再灌注损伤中的作用

Objective To investigate the role of opioid receptors in the protective effects of isoflurane-induced delayed preconditioning against myocardial ischemia-reperfusion (I/R) injury in rabbits. Methods Forty male New Zealand white rabbits weighing 2.0-2.5 kg were randomly assigned into 4 groups ( n = 10 each) : group I sham operation (S); group II I/R; group Ⅲ isoflurane + I/R (Iso) and group IV Iso + naloxone + I/R (Nal). Myocardial I/R was induced by 40 min occlusion of left anterior descending branch (LAD) of coronary artery followed by 120 min reperfusion. In group Ⅲ (Iso) 2% isoflurane in 100% O2 was inhaled for 2 h and I/R was produced 24 h later. In group IV (Nal) naloxone 6 mg/kg was given iv 10 min before 2 h of 2% isoflurane inhalation and I/R was produced 24 h later. At the end of 120 min reperfusion, infarct size (IS) and area at risk (AAR) were determined by Evan's blue and TTC staining. Myocardial ultrastructure was examined by electron microscopy. The phosphorylated p38MAPK protein expression in myocardium was determined by Western blot. Results The IS was significantly smaller in group Iso ( Ⅲ ) ( 19.7% ± 2.8%) than in I/R group ( II ) (37.8% ±1.7%) (P<0.05). The phosphorylated p38MAPK protein expression in myocardium was significantly lower in group Iso than in group I/R. Microscopic examination showed less myocardial damage in Iso group than in group I/R. The protective effects of delayed preconditioning by isoflurane was prevented by naloxone pretreatment. ConclusionOpioid receptors may be involved in the protective effects of delayed preconditioning by isoflurane against myocardial I/R injury.     

口腔修复学多媒体手册的设计与开发

本文介绍了口腔修复学多媒体手册的设计与开发。阐述了多媒体手册开发过程中制作工具的选择、素材的加工、结构的安排，并且对多媒体手册在理论、实验和临床实习中教学应用模式进行了探讨。