Objective To study the expression of heat shock protein 47 (HSP47) and its correlation to collagen deposition in pathological scar tissues. Methods The tissues of normal skin(10 cases), hypertrophic scar(19 cases), and keloid(16 cases) were obtained. The expression ofHSP47 was detected by immunohistochemistry method. The collagen fiber content was detected by Sirius red staining and polarization microscopy method. Results Compared with normal skin tissues(Mean IOD 13 050.17±4 789.41), the expression of HSP47 in hypertrophic scar(Mean IOD -521 159.50±272994.13) and keloid tissues(Mean IOD 407 440.30±295 780.63) was significantly high(Plt;0.01). And there was a direct correlation between the expression of HSP47 and the total collagen fiber content（r＝0.386，Plt;0.05）. Conclusion The HSP47 is highly expressed in pathological scartissues and it may play an important role in the collagen deposition of pathological scar tissues.
ObjectiveTo investigate the influence of heat shock protein A2 (HSPA2) on the biological behavior of pancreatic adenocarcinoma cells and its mechanism. MethodsThe expressions of HSPA2 were determined in the human pancreatic adenocarcinoma cell lines (PANC-1, BxPC-3, and AsPC-1) using the Western blot. Subsequently, the cells with the lowest and highest HSPA2 expressions among these three lines were selected for conducting overexpression and knockdown experiments targeting HSPA2, respectively. The cellular proliferation, cell clonogenesis, migration, and invasion capabilities were assessed using MTT, clonogenic assay, and Transwell assay, respectively. Additionally, the impact of HSPA2 on the expression of key markers of epithelial-mesenchymal transition (EMT) was examined using the Western blot. The potential target molecules of HSPA2 were identified through immunoprecipitation assay and mass spectrometry. The rescue experiments further explored the regulatory relation between the HSPA2 and its target molecules. The influence of HSPA2 on pancreatic adenocarcinoma growth was investigated through establishment of xenograft tumor model in nude mice. ResultsThe HSPA2 exhibited the lowest expression in the PANC-1 cells and the highest expression in the AsPC-1 cells among the three cell lines. Subsequent functional studies demonstrated that the overexpression of HSPA2 in the PANC-1 cells markedly promoted proliferation, cell clonogenesis, migration, and invasion, while the knockdown of HSPA2 expression in the AsPC-1 cells markedly inhibited these processes. The Western blot analysis further showed that the HSPA2 overexpression downregulated E-cadherin expression and upregulated N-cadherin and Vimentin expressiones, whereas the HSPA2 knockdown produced opposite effects. The rescue experiments indicated that the HSPA2 promoted the EMT in pancreatic adenocarcinoma cells by upregulating Yes associated protein (YAP). The subcutaneous xenograft tumor experiments in the nude mice showed that the HSPA2 knockdown inhibited tumor growth. ConclusionThe results of this study suggest that HSPA2 promotes EMT via upregulating YAP, which facilitates proliferation, migration, and invasion of pancreatic adenocarcinoma cells.
Objective To investigate the effects and mechanisms of pentoxifylline ( PTX )pretreatment on acute lung injury ( ALI) induced by hemorrhagic shock in mice. Methods Ninety mice were randomly divided into three groups, ie. a control group, a hemorrhagic shock group, and a PTX group.Lung histological changes were examined by HE staining. Meanwhile, the wet-to-dry weight ratio ( W/D) and myeloperoxidase ( MPO) activity in lung were measured. The levels of TNF-αand IL-1βin lung homogenatewere measured by ELISA. The expressions of TLR4 mRNA and TLR4 protein in lung were detected by reverse transcription-polymerase chain reaction ( RT-PCR ) and Western blot, respectively. Results Hemorrhagic shock induced obvious ALI changes in lungs of the hemorrhagic shock group. W/D and MPO activity were significantly higher in the hemorrhagic shock group than the control group( P lt; 0. 01) . The expressions of TNF-α, IL-1β, TLR4 mRNA and TLR4 protein were also significantly higher than the control group( P lt;0. 01) . PTX pretreatment could relieve ALI changes induced by hemorrhagic shock, and decrease W/D and MPO activity. The expressions of TNF-α, IL-1β, TLR4 mRNA and TLR4 protein were also decreased by PTX pretreatment. Conclusions PTX pretreatment shows protective effects on ALI afterhemorrhagic shock. Its possible mechanismmay relate to down-regulation of TLR4, thus inhibit the expression of pro-inflammatory cytokins.
Objective To observe the effects of basic fibroblast growth factor (bFGF) on the expression of heat shock protein 70 (HSP70) in ratrs retina after iscbemia/reperfusion injury.Methods The rat model of experimental retinal ischemia/reperfusion injury was made by increasing the intraocular pressure. Tweenty-four Wistar rats were divided into normal (3 rats) and operation group (21 rats) randomly. The latter group was subdivided into group 0 hour, 4, 8, 12, 24, 48 and 72 hours after reperfusion, in which the left eyes of the rats were in the ischemia/reperfusion groups and the right ones were in the treatment groups (bFGF 2 t~g intracameral injection). The expression of HSP70 was observed by strept avidin-biotin complex (SABC) immunohistochemistry. Results No HSP70 positive cells were found in normal group; a few of HSP70 positive cells were found 0 hour after reperfusion [20.8±4. 5) cells/mm2], and increased gradually until reached the peak 24 hours later [(111.2±4.4) cells/mm2] and then decreased gradually. Few HSP70 positive cells were found 72 hours after reperfusion. The amount of HSP70 positive cells increased in treatment group at all time courses, and the peak time was earlier and longer than that in ischemia group. HSP70 positive cells distributed extensively in retinal ganglion cell layer and inner nucleous layer. The difference of the amount of HSP70 positive cells between the two groups was significant (Plt;0.05) 8, 12, 24, 48 and 72 hours after reperfusion.Conclusion bFGF can enhance the expression of HSP70 in rat’s retina after retinal ischemia/reperfusion injury.(Chin J Ocul Fundus Dis，2004，20：37-39)
目的通过漂浮导管（Swan-Ganz导管）监测外周血管阻力指数（SVRI）作为优化的心功能不全状态下感染性休克早期目标导向治疗（EGDT）的临床意义。 方法2012年1月至2014年1月第四军医大学附属西京医院心血管外科ICU收治体外循环心脏术后感染性休克患者8例，其中男7例、女1例，年龄（50.9±11.1）岁。以中心静脉压（CVP）为复苏目标行经验性容量复苏治疗，循环未见改善，则实施漂浮（Swan-Ganz）导管监测血流动力学指标，以外周血管阻力指数（SVRI）为优化目标复苏，观察Swan-Ganz导管复苏前及复苏6 h、24 h后的血流动力学及氧代谢指标，分析复苏达标所需时间。 结果8例患者平均住ICU时间（16.87±3.35）d，发生肺部并发症8例，急性肾功能衰竭5例，急性肝功能衰竭1例，消化道出血1例。6例28 d后病情好转存活，死亡2例。8例感染性休克患者经Swan-Ganz导管目标导向治疗6 h和24 h后平均动脉压（MAP）分别为（65.8±2.76）mm Hg、（67.8±3.79）mm Hg，中心静脉压（CVP）分别为（12.75±3.37）cm H2O、（9.75±2.86）cm H2O，心排血量指数（CI）分别为（2.36±0.12）L·min-1·m-2、（2.41±0.39）L·min-1·m-2，外周血管阻力指数（SVRI）分别为（1 892.60±2 294.62）dyn·s·m2·cm-5、（2 053.90±205.54）dyn·s·m2·cm-5，各项指标均较治疗前升高；治疗6 h和24 h后动脉血乳酸分别为（11.83±1.16）mmol/L、（6.47±2.59）mmol/L，较治疗前[（14.98±0.45）mmol/L]下降。 结论采用Swan-Ganz导管监测SVRI作为优化目标导向治疗心功能不全状态下感染性休克可以提高6 h复苏成功率，改善患者预后。
ObjectiveTo investigate the effect of polymyxin B hemoperfusion on the prognosis of patients with sepsis and septic shock by meta-analysis.MethodsSupplemented by manual search and document traceability, the US National Library of Medicine Pubmed, the Dutch Medical Abstracts Embase database, and the Cochrane clinical trial database were searched. Randomized controlled trials (RCTs) were collected from January 1998 to October 2018 for the treatment of sepsis and septic shock with polymyxin B hemoperfusion, only limited to English publications. The collected RCTs were evaluated and the prognosis of patients with sepsis and septic shock was analyzed by the Cochrane Collaboration.ResultsFinally six RCTs were included, and a total of 926 patients were analyzed, with 471 patients in the polymyxin B hemoperfusion group and 455 patients in the control group. The mortality rate was 36.3% (171/471) in the polymyxin B hemoperfusion group and 39.1% (178/455) in the control group. Hemoperfusion with polymyxin B could not reduce the patient mortality (RR=0.80, 95% CI 0.56 to 1.15, P=0.233). A subgroup analysis was taken on the patients with moderate to severe septic shock. Four RCTs were included in total and 418 patients were analyzed, with 207 patients in the polymyxin B hemoperfusion group and 211 in the control group. The mortality rate was 38.65% (80/207) in the polymyxin B hemoperfusion group and 50.71% (107/211) in the control group were. The hemoperfusion of polymyxin B could significantly reduce the mortality of patients with moderate to severe septic shock (RR=0.70, 95% CI 0.52 to 0.96, P=0.025).ConclusionsOlymyxin B hemoperfusion can not improve the prognosis of patients with sepsis and septic shock. However, compared with conventional treatment, polymyxin B hemoperfusion can improve the 28-day mortality rate of patients of severe septic shock. Due to the limit number of randomized controlled trials, more high-quality trials are needed to a further confirmation.
Objective To study the effects of heat shock proteins (HSPs) in the course of hepatic ischemia reperfusion injury (HIRI), and analyze its mechanism. Methods The relationship between HSPs and HIRI was studied by reviewing literatures. Results HSPs was a kind of stress protein induced after cell was sitmulated by the stress. It could improve body′s tolerance to tough situation. Though hepatic ischemia reperfusion usually results in serious hepatic injury, at the same time it could induce can increase the production of HSPs that can protect liver from and lessen ischemia reperfusion injury. Conclusion HSPs can improve the tolerance to HIRI and lessen injury. In addition, HSPs is thought to be markers of HIRI, and can be used as a efficient indicator to test the level of hepatic injury and assess prognosis.
ObjectiveTo investigate the clinical value of quick sequential organ failure assessment (qSOFA) score in predicting the outcome of patients with septic shock. MethodsWe collected the clinical data of 170 patients with septic shock treated in the Emergency Intensive Care Unit between January 2013 and January 2014. According to the 28-day outcomes of the patients, they were recorded as survival group and non-survival group. We calculated the qSOFA score, acute physiology and chronic health evaluation (APACHE)Ⅱ score on patients' admission. Using receiver operating characteristic (ROC) curve, we analyzed the qSOFA score, the effect of APACHE Ⅱ score in predicting the 28-day prognosis for patients with septic shock. The correlation between qSOFA score and APACHEⅡ score was also assessed. ResultsThe qSOFA and APACHEⅡ scores in non-survivors were higher than those in the survivors. According to ROC curve analysis, the area under the curve for qSOFA score and APACHE Ⅱ score was 0.666 and 0.791, respectively. For qSOFA score with 2 cut-off points to evaluate the prognosis of septic shock, the sensitivity was 62.7%, specificity was 61.1%, positive predictive value was 56.0%, negative predictive value was 67.4%, positive likelihood ratio was 1.61, and negative likelihood ratio was 0.61. For the APACHEⅡ score with 24 cut-off points to evaluate the prognosis of septic shock, the sensitivity was 70.7%, specificity was 80%, positive predictive value was 73.6%, negative predictive value was 67.3%, positive likelihood ratio was 3.54, and negative likelihood ratio was 0.37. The correlation coefficient of qSOFA score and APACHE Ⅱ score was 0.499. ConclusionThe qSOFA score is useful to evaluate the prognosis of the patients with septic shock early in Emergency Department.