To evaluatae the role of cathepsin B in the pathogenesis of acute pancreatitis. The experimental dogs were divided into three groups based on the severity. An acute edematous pancreatitis group (n＝11), an acute hemorrhagic necrotizing pancreatitis group (n＝12), and a control group (n＝7). Distribution of cathepsin B in pancreatic aciner cell was studied. Results: there was a redistribution of cathepsin B from the lysosomal fraction to the zymogen fraction. The results indicated that cathepsin B play a important role in the pathoagenesis of acute pancreatitis.
Objective To explore and evaluate the protective effects of soluble fms-like tyrosine kinase recptor-1(sFlt-1) gene 2-3 and 2-4 transcellular region on retinal vascular leakage and phosphatidyl inositol-3 kinase (PI3K)/Akt pathway under hypoxia and/or hyperglycemia. Methods The plasmids pcDNA3.1-EGFP/sFlt-1(2-3) and pcDNA3.1-EGFP/sFlt-1(2-4) were constructed.. Two of these plasmids with carboxy methylation glucan (CMD) magnetic particles were transfected into human umbilical vein endothelial cells (HUVEC), which were cultured under hypoxia and/or hyperglycemia. The blood retinal barrier was evaluated by Evans blue permeation (EBP). Then the expression of p-Akt mRNA and protein were detected by reverse transcriptionpolymerase chain reaction (RT-PCR) and Western blot separately. Results In the diabetic rabbits, The blood retinal barrier breakdown was detected by the retinal vascular leakage of EBP. The expression of p-Akt mRNA and protein in hypoxia and hyperglycemia groups were also obviously increased. These changes were largely prevented by transfection the plasmids pcDNA3.1-EGFP/sFlt-1(2-3) and pcDNA3.1-EGFP/sFlt-1(2-4) (P＜0.01 in both groups). Conclusion Both sFlt-1(2-3) and sFlt-1(2-4) can make the retinal blood vessels less leaky and may be beneficial in preventing vision loss from diabetic retinopathy.
目的 探讨组织蛋白酶B（CB）在膀胱移行细胞癌（TCC）中的表达以及其与TCC浸润的关系。 方法 取TCC标本40例，TCC分级Ⅰ级23例，Ⅱ～Ⅲ级17例；表浅型TCC（Tis，Ta，T1期） 25例，浸润型TCC（T2～4期）15例。另取10例正常膀胱组织作为对照。用链霉素抗生物素蛋白-过氧化物酶连接法行CB免疫组织化学染色观察并计算CB阳性细胞百分率。 结果 正常膀胱组织中基质无明显着色；在TCC癌组织中，CB可为细胞染色，部分基质亦有染色，部分毛细血管内皮细胞及部分成纤维细胞CB表达阳性，在癌周血管内皮细胞的阳性着色CB表达增强。CB在分级和分期高的癌组织中多为弥散阳性染色。TCC分级Ⅰ级组、TCC分级Ⅱ～Ⅲ级组、TCC分期表浅型组、TCC分期浸润型组及正常对照组的CB阳性细胞百分比分别为10.53% ± 3.76%、21.52% ± 3.58%、11.32% ±2.69%、20.57% ± 3.25%、0.11% ± 0.18%，TCC各组均高于正常对照组（P＜0.01）；TCC分级Ⅱ～Ⅲ级组高于TCC分级Ⅰ级组，TCC分期浸润型组高于TCC分期表浅型组，差异均有统计学意义（P＜0.01）。 结论 CB可能成为判断TCC进展和预后的重要指标。