罗格列酮对多囊肾囊肿衬里上皮细胞p38促分裂原活化蛋白激酶信号通路的影响

Objective To investigate the effect of rosiglitazone on p38 mitogen-activated protein kinase (p38MAPK) pathway in polycystic kidney cyst-lining epithelial cells. Methods The cyst-lining epithelial cells (PKD cells) from human polycystic kidney were treated with rosiglitazone (10 μmol/L), peroxisome proliferator-activated receptor-γ (PPARγ) inhibitor GW9662 (10 μmol/L), rosiglitazone (10 μmol/L) +GW9662 (10 μmol/L), p38MAPK specific inhibitor SB203580 (10 μmol/L), SB203580 (10 μmol/L)+ rosiglitazone(10 μmol/L) for 2 hours followed by epidermal growth factor (EGF) stimulation. Protein expressions of p38, phuspho-p38 (p-p38) and proliferating cell nuclear antigen (PCNA) were detected by Western blot. p38 mRNA was examined by RT-PCR. Expression of c-fos and c-jun was observed by immunocytochemistry. Results (1) EGF markedly up-regulated the expressions of p38, p-p38, PCNA, c-fos anti c-jun compared with control group (P<0.01). (2) Compared with EGF treated group, rosiglitazone significantly reduced p38 activation and mRNA expression (P<0.01, respectively). Rosiglitazone, rosiglitazone+SB203580 could significantly down-regulated p-p38, PCNA, c-fos and c-jun expression (P<0.01, respectively) with no significant difference between these two groups. (3) GW9662 partially reversed the reduction effect of rosiglitazone. Conclusions Rosiglitazone can inhibit proliferation of autosomal dominant polycystic kidney disease cyst-lining epithelial cells partially through down-regulating p38 activation and reducing c-fos, c-jun and PCNA expression. The above effect of rosiglitazone is in part PPARγ-independcnt.     

骺板软骨细胞复合三维支架体外构建组织工程软骨的研究

目的探讨将骺板软骨细胞复合三维支架经体外培养,构建组织工程软骨的效果及其生物学特点. 方法将3周龄幼兔第1代骺板软骨细胞与液态的生物凝胶混合,接种于聚磷酸钙纤维/L-聚乳酸(CPPF/PLLA)三维支架材料,构建组织工程软骨组织块,连续培养4周.行大体、倒置显微镜及组织学、Ⅰ型和Ⅱ型胶原免疫组织化学光镜观察,定量检测硫酸糖胺多糖(GAG)含量. 结果构建的组织工程软骨块在培养过程中能保持其初始外形,种子细胞呈稳定的三维均相分布,外观逐渐呈乳白色、半透明,硬度亦不断增加.培养1周有软骨细胞陷窝形成,2周后形成富含Ⅱ型胶原和蛋白聚糖、具有典型软骨组织结构的工程化软骨,且Ⅰ型胶原逐渐转为阴性.4周时构建软骨的组织结构与天然骺板软骨相类似,硫酸GAG含量平均为天然骺板软骨的34%以上. 结论骺板软骨细胞复合三维支架体外培养可生成典型软骨,且可形成类似天然骺板软骨的组织结构,能满足修复骺板缺损的基本要求.体外培养1～2周可能是植入体内修复骺板缺损的较佳时机.     

冠状动脉造影正常的急性心肌梗死临床分析

目的对比观察急性心肌梗死(AMI)冠脉造影正常和异常患者的临床表现.方法同期144例AMI患者,于发病12h内行尿激酶溶栓,并于心梗后7～14d内行经皮冠状动脉造影术,梗死相关动脉(IRA)再通且无冠脉病变者为冠脉正常组,再通且有冠脉病变及PTC成功者为冠脉异常组.记录二组患者易患因素,观察ST段抬高总和及90min回落程度,比较二组住院期间心脏事件发生率,并于出院前行超声心动图检查.结果144例患者中冠脉正常组10例,冠脉异常组134例,前者较后者年龄轻,男性,吸烟等诱因多见;造影时TMI 3级多见;ST段抬高总和于90min回落明显(P＜0.05);住院期间心脏事件发生率明显降低(P＜0.05);出院前超声心动图提示左室射血分数较高(P＜0.05).结论AMI冠脉造影正常者相对年龄轻,吸烟诱因多,住院期间心功能和临床预后好.     

田径运动员最大摄氧量和无氧功测试中血乳酸的应用

目的:研究田径运动员最大摄氧量和Wingate测试后血乳酸的变化,分析血乳酸对测试结果的意义。方法:测试田径短跑运动员36例和中长跑运动员29例的最大摄氧量和Wingate无氧功,以及测试后的血乳酸值。结果:最大摄氧量测试后血乳酸数值为9～11mmol/L左右,摄氧量与乳酸值没有直接相关关系,但不同项目之间有一定的差异;Wingate测试后血乳酸数值一般大于12mmol/L,测试的主要评价指标与乳酸值都有较高的相关关系。结论:血乳酸值对于最大摄氧量测试意义不大,但对于Wingate测试可以作为一项辅助评价指标。     

选择性上肢神经阻滞和静脉局部麻醉的进展

临床实践中，尽管臂丛神经阻滞可采用多种人路以满足上肢区域麻醉的需要，但有时仍需应用一些不常见的技术，如选择性上肢神经阻滞和静脉局部麻醉（IVRA），来阻滞非源自臂丛的神经或弥补臂丛神经阻滞不全。     

内镜下套扎与硬化夹心联合法治疗食管静脉曲张出血的研究

目的　了解套扎与硬化夹心联合法 (套扎 硬化 套扎 )能否获得优于单纯内镜下食管静脉曲张结扎 (EVL)的疗效。方法　对 98例肝硬化食管静脉曲张伴活动性出血或近期出血的患者随机采用单纯EVL或夹心法治疗 (EVL组 5 0例 ,夹心法组 4 8例 )。EVL组每条曲张静脉结扎皮圈不超过 3个 ,夹心法组每条曲张静脉结扎 2个皮圈 ,并在两个结扎点之间的曲张静脉内注射 1～ 3ml硬化剂。夹心法组 7例在首次内镜治疗时接受食管静脉造影检查。 7～ 10d重复 1次内镜治疗 ,直至静脉曲张消除。结果　 7例行静脉造影检查 ,其中 6例硬化剂在曲张静脉内滞留时间超过 4 5min。两种方法控制活动性食管静脉曲张出血 (EVB)的止血成功率相同 (10 0 .0 % ) ;两组间静脉曲张消除率相似 (夹心法组 93.8% ,EVL组 90 .2 % ,P >0 .0 5 ) ,但夹心法组一次治疗后静脉曲张消除率明显高于EVL组 (6 6 .7%比10 .0 % ,P <0 .0 0 1) ,达到消除的平均治疗次数明显减少 (1.2± 0 .4比 3.8± 1.5 ,P <0 .0 1) ,所需时间显著缩短 [(13.1± 4 .3)d比 (42 .5± 16 .7)d ,P <0 .0 1];与EVL组相比 ,夹心法组再出血率较低 (8.3%比2 8.0 % ,P <0 .0 5 ) ,随访期内静脉曲张复发率明显下降 (8.3%比 4 4 .0 % ,P <0 .0 0 5 ) ;两组间并发症发生率相似 (夹心法组 1     

吗丁啉联合四磨汤治疗新生儿胃食管反流的临床观察

目的观察吗丁啉联合四磨汤治疗新生儿胃食管反流(GER)的效果。方法经食管钡剂造影诊断明确的68例新生儿胃食管反流者随机分为治疗组34例,对照组34例,治疗组在喂奶前20~30分钟口服或鼻饲吗丁啉(0.3 mg/Kg.次),q8h,并合用四磨汤(1m l/Kg.次),每日3次,对照组仅服用吗丁啉,疗程均为5天。结果治疗组显效26例,有效5例,无效3例,有效率88.2%。对照组显效17例,有效7例,无效10例,有效率70.6%。两组比较结果差异有统计学意义,2χ=4.66,P<0.05。结论吗丁啉联合四磨汤治疗新生儿胃食管反流效果明显,无毒副作用,且有利于生长发育。     

Dynamic observation on thyroid function in severe head injury.

The dynamic changes of thyroid hormone levels in patients with severe head injury were observed. The results showed that the serum thyroid hormone levels changed rapidly within several hours after the injury and the mean levels of serum total T3 and T4 (TT3, TT4) decreased while high reverse triiodothyronine (rT3) increased significantly. Serum TT3, TT4 and rT3 levels returned to normal gradually in 2 to 3 weeks after the injury in the surviving group, whereas serum total T4 gradually declined and rT3 steadily increased in the fatal group. The mean levels of serum TSH remained unchanged in both groups. Therefore, the use of the levels of serum thyroid hormones as adjuvant indices can be helpful in making pertinent judgements of the severity and prognosis of severe head injuries.

     

江西麦饭石对某些实验动物生理功能影响

用江西麦饭石水浸液喂养小鼠116只,自来水喂养39只,食物条件完全相同,一个月后,发现饮用江西麦饭石水浸液的小鼠体重增长和抗疲劳及耐缺氧能力均优于对照组。用麦饭石任氏液灌注离体蛙心后,心肌收缩力有明显增强。     

硝普钠透皮递药系统控释膜的制备

为了寻找能够控制硝普钠释放的控释膜,研究了数种高分子膜的通透性,其中以经过热处理的聚乙烯醇(PVA)膜控制硝普钠释放性能较好。进一步研究了热处理条件对PVA膜通透性的影响,发现只要热处理的温度和时间恰当,就可以获得具有一定通透性的PVA膜。