茶多酚对5500m低压条件下吸纯氧引起的小鼠心肌自由基代谢异常的保护作用

目的 观察天然抗氧化剂茶多酚（Tea Polyphenols,TP)对模拟飞行低压吸纯氧引起的小鼠心肌自由基代谢异常的保护作用。方法 42只雄性昆明种小鼠随机分为3组（n=14):对照组（A）、5500m低压吸氧组（B）和TP保护组（C）。B、C两组置于动物低压舱在5500m低压下吸氧（＞96％）,2h/d,3d/wk,共8wk。上舱暴露前,C组灌胃给予TP100mg/kg,另2组给予蒸馏水。末次实验后次日将小鼠断头处死,迅速取出心肌组织。测定心肌超氧化物歧化酶（SOD）活性和丙二醛（MDA）、一氧化氮（NO）含量。另外,用免疫组化法对心肌组织Cu,Zn-SOD和诱生型NO合酶（iNOS)的含量进行定性观察。结果 与对照比较,B组MDA水平、SOD添性和Cu,Zn-SOD酶含量明显升高（P＜0．05）;TP有明显保护作用：降低MDA生成（P＜0．01）,SOD活性和含量恢复正常。与之相反,重复5500m低压吸氧暴露后,心肌NO含量和iNOS表达明显降低。重复给予TP使NO代谢恢复正常。结论 天然抗氧化剂茶多酚对模拟飞行低压吸纯氧引起的心肌自由基代谢异常具有保护作用。     

保留假体的序贯疗法治疗骨肿瘤保肢术后假体周围感染

目的:探索应用保留假体的"多米诺"序贯疗法治疗骨肿瘤保肢术后假体周围感染的注意事项和临床疗效。方法:收集并回顾性分析2016年1月至2020年1月共11例采用保留假体的序贯疗法治疗骨肿瘤保肢术后假体周围感染患者资料,其中男8例,女3例;年龄（51.82±15.57）岁（范围21~74岁）。股骨远端肿瘤膝假体6例,胫骨近...     

Ischemic postconditioning inhibits apoptosis after renal ischemia/reperfusion injury in rat.

Ischemic postconditioning is a phenomenon that intermittent interruptions of blood flow in the early phase of reperfusion can protect organ from ischemia/reperfusion (I/R) injury. In the present study, we investigated whether the protective effect of ischemic postconditioning was associated with modulation of apoptosis after renal I/R injury. Rats were subjected to 45 min of renal ischemia, both with and without treatment with ischemic postconditioning. Serum urea nitrogen and creatinine levels, phosphorylation of Akt and ERK1/2 and apoptosis were compared after renal injury. Our data showed that ischemic postconditioning attenuated the renal dysfunction and cell apoptosis induced by I/R and increased phosphorylation of Akt and ERK1/2. The results indicated that ischemic postconditioning decreased apoptosis and improved renal function. This protective effect may be related with the levels of Akt and ERK1/2 activation. These findings may have major implications in the treatment of renal transplantation.     

bFGF喷雾剂对颌面部软组织创伤愈合的影响

目的：观察见林bFGF（外用重组牛碱性成纤维细胞生长因子）喷雾剂治疗颌面部开放性软组织创伤的临床效果，探讨软组织创伤新的治疗途经。方法：对2004～2006年收治的72例颌面部创伤患者，按随机抽取的方法将患者分为见林bFGF剂治疗组及常规外科治疗组。结果：两组患者均治愈，见林bFGF剂治疗法无明显瘢痕增生，平均愈合期5．6天；常规外科治疗法有9例产生瘢痕增生，平均愈合期7．5天。在半年及1年时复查，见林bFGF剂治疗组创口愈合后，创面区域平复无增生，皮肤无异常。结论：见林bFGF喷雾剂治疗颌面部开放性软组织创伤优于常规外科治疗法。     

Ultrasound detection of blunt splenic injury

The purpose of this study was to determine the sensitivity of emergency ultrasound (US) for the detection of blunt splenic injury (BSI), and to describe sonographic parenchymal patterns. Over 3 years, 2138 emergency US were performed, and 162 patients had BSI. CT was performed for 76 patients, and there were 86 laparotomies. Seventy patients (43%) had concomitant intraabdominal injuries. Ultrasound detected free fluid in 109 patients (67%), and parenchymal injury in 31 patients (19%). There were 48 false negative US (30%). Sonographic patterns included a diffuse heterogeneous appearance, hyperechoic and hypoechoic perisplenic crescents, and discrete hypoechoic or hyperechoic areas within the spleen. Overall sensitivity of US for detection of BSI was 69%, but was 86% for grade III or higher injuries. Ultrasound is most sensitive for the detection of grade III or higher BSI based on the presence of haemoperitoneum. Ultrasound may also identify BSI on the basis of parenchymal abnormality, with a diffuse heterogeneous pattern most commonly encountered. Sonographic evaluation for both free fluid and parenchymal injury improves sensitivity of US.     

微波联合腹部按摩预防骨科术后便秘

目的观察微波联合腹部按摩预防骨科术后便秘的效果。方法将60例骨科术后患者随机分为对照组和观察组各30例,两组均予以常规护理,包括饮食指导、康复护理等,观察组在此基础上予以微波联合腹部按摩治疗。结果观察组便秘发生率显著低于对照组(P0.01)。结论微波联合腹部按摩可有效预防骨科术后患者便秘,促进术后康复。     

Apogossypolone, a novel inhibitor of anfiapoptotic Bcl-2 family proteins, induces autophagy of PC-3 and LNCaP prostate cancer cells in vitro

Limited treatment options are available for aggressive prostate cancer. Gossypol has been reported to have a potent anticancer activity in many types of cancer. It can increase the sensitivity of cancer cells to alkylating agents, diminish multidrug resistance and decrease metastasis. Whether or not it can induce autophagy in cancer cells has not yet been determined. Here we investigated the antiproliferative activity of apogossypolone （ApoG2） and （-）-gossypol on the human prostate cancer cell line PC3 and LNCaP in vitro. Exposure of PC-3 and LNCaP cells to ApoG2 resulted in several specific features characteristic of autophagy, including the appearance of membranous vacuoles in the cytoplasm and formation of acidic vesicular organelles. Expression of autophagy-associated LC3-Ⅱ and beclin-1 increased in both cell lines after treatment. Inhibition of autophagy with 3-methyladenine promoted apoptosis of both cell types. Taken together, these data demonstrated that induction of autophagy could represent a defense mechanism against apoptosis in human prostate cancer cells.     

Effect of Radix Paeoniae Rubra on the expression of HO-1 and iHOS in rats with endotoxin-induced acute lung injury

Objective ： To investigate the effect of Radix Paeoniae Rubra （RPR） on the expression of heme oxygenase （ HO- 1 ） and induced nitric oxide synthase （ iNOS ） in endotoxin- induced acute lung injury in rats and its protective mechanism. Methods： Forty Wistar rats were divided randomly into 5 groups with 8 rats in each group： saline control group （NS group ）, lipopolysaccharide group （LPS group）, RPR-treatment group, RPR-prevention group and Hemin group. The effect of RPR on protein content, the ratio of neutrophiles in bronchoalveolar lavage fluid, malondialdehyde （MDA） content in the lung and the activity of serum NO were observed. Arterial blood was drawn for blood-gas analysis. The expression of HO-1 and iNOS in lung tissues was detected by immunohistochemitry and morphometry computer image analysis. The histological changes of the lung were observed under fight microscope. Results： Compared with that in NS group, the expression of HO-1 and iNOS was markedly increased in LPS group （P 〈0.01）. In RPR-treatment, RPR-prevention, and Hemin groups, the expression of iNOS was significantly lower, while the expression of HO-1 was higher than that in LPS group （P〈0.05）. The protein content, the ratio of neutrophiles in bronchouiveolar lavage fluid, the content of MDA and the activity of serum NO in LPS group were significantly higher than those in NS group （ P〈0.01 ）. There was a significant decrease in the level of arterial bicarbonate and partial pressure of oxygen in the LPS group （P 〈0.01）; these parameters of lung injury however, were significantly lower in RPR-treatment, RPR- prevention, and Heroin groups than LPS group （P〈0.05 or P〈0.01 ）. The pathologic changes of lung tissues were substantially attenuated in RPR-treatment, RPR- prevention, and Hemin groups than LPS group. Conclusions ： The high expression of HO-1 reflects an important protective function of the body during lipopolysaccharide-induced acute lung injury. The acute lung injury is related to the inhibition of iNOS expression and the induction of HO-1 expression.     

经导管国产封堵器介入治疗膜周部室间隔缺损患儿的疗效随访

目的  随访观察经导管国产封堵器介入治疗膜周部室间隔缺损（PMVSD）患儿的疗效及并发症。方法  选择2011年7月-2014年12月该院使用国产封堵器行介入治疗的PMVSD患儿52例,所有患儿在X线透视及超声下行室间隔缺损（VSD）封堵术治疗,术后即刻行左心室、升主动脉造影,超声心动图评价治疗效果。术后1 d、1、3、6、12及24个月及以后每隔1年定期复查,评价短期及中远期疗效,包括经胸超声心动图评价分流和返流情况,心脏大小及心功能情况。同时行心电图检查观察有无心律失常。结果  ①48例患儿治疗成功,4例未能封堵成功,手术成功率92.31%。②对48例患儿进行了临床随访,中位随访时间23.6个月（12～48个月）。其中,4例患者术后1 d存在微量或少量残余分流,即刻残余分流率8.33%,术后残余分流量逐渐减少,术后1个月2例分流完全消失,2例仍存在微量或少量分流,残余分流率4.17%。6例患儿出现传导阻滞,其中右束支传导阻滞5例,左束支传导阻滞1例。1例患儿出现交界性室性异搏心率,心律失常发生率为14.58%。术后24个月新出现微量或少量返流2例,无封堵器脱落、血栓栓塞、感染性心内膜炎或猝死等。③患儿术后12和24个月的心脏大小均较术后1 d增大（P <0.05）,但均在正常范围内。而术后12个月、24个月、术后1 d与术前的心功能比较差异无统计学意义（P >0.05）。结论  经导管国产封堵器介入治疗小儿膜周部室间隔缺损成功率较高,术后并发症发生率低,中远期疗效确切,值得临床推广应用。

     

孟鲁司特联合强的松对博莱霉素诱导的肺纤维化大鼠模型的干预作用

目的  研究孟鲁司特联合强的松对博莱霉素诱导的肺纤维化（PF）大鼠模型的干预作用。方法  将60只Wistar大鼠随机分成5组,即空白对照组、模型对照组、孟鲁司特（MK）组、强的松组及联合干预组。空白对照组以生理盐水0.2 ml注入气管内,其余4组以气管内滴注博莱霉素（5 mg/kg）建立PF模型。分别在造模后第7天和第28天5组各处死6只大鼠取材。采用苏木精-伊红和Masson染色法观察肺组织纤维化改变,酶联免疫吸附试验检测血清结缔生长因子（CTGF）、转化生长因子β1（TGF-β1）的水平,免疫组织化学法染色检测肺组织中CTGF和TGF-β1的表达水平。结果  联合干预组和模型对照组比较,第7天肺泡炎评分为（1.63±0.16）和（2.73±0.15）,第28天肺间质纤维评分（1.66±0.10）和（2.76±0.13）分,差异有统计学意义（P <0.01）。第7天,各组肺组织TGF-β1表达水平均低于模型对照组,差异有统计学意义（P <0.05）。第28天,各组肺组织CTGF、TGF-β1表达水平均低于模型对照组,差异有统计学意义（P <0.01）。第7天、第28天血清中CTGF和TGF-β1水平均低于模型对照组,差异有统计学意义（P <0.01）。结论  MK联合强的松更能显著减轻大鼠肺组织肺泡炎及PF程度,其机制与降低血清及组织中CTGF和TGF-β1的表达水平相关。