Objective To evaluate the diagnosis and treatment of primary retroperitoneal tumor. Methods The clinical data of 75 patients with primary retroperitoneal tumor confirmed by operation and pathology in recent 20 years in our hospital were analyzed retrospectively. Results About 57.3% of the patients were diagnosed accurately before the operation. Correct diagnostic rates of ultrasound and CT were 60.0% and 84.0% ,respectively.Of them 57cases(76.0%) were malignant and18 (24.0%) benign tumor. Tumor size was not related to the pathological characteristics.Radical resection was done in 42 patients(56.0%),partial resection in 23 patients (30.7%),and biopsy in 10 patients(13.3%).Conclusions Ultrasonic and CT are the major diagnostic methods. Early operation is recommended after necessary preparation. Surgical resection is a major procedure for the management of primary retroperitoneal tumor and might provide long surrival time.

Objective To study the effect of Tspan 8 on metastasis and invasion of human hepatocellular carcinomas(HCC).Methods RT-PCR and western blot were used to detect the expressions of Tspan 8 in HCC cell lines,HCC and matched nontumorous tissues.The expression of Tspan 8 was then down-regulated by LV/GFP/Tspan 8 in HCC cells.The expressions of Tspan 8 mRNA and protein were determined by RT-PCR and Western blot assay,respectively.The proliferation was examined by MTT,the expression of AMDM12 was assessed by Western blot,and the invasion ability of HCC cells was evaluated by transwells.Results A high level of Tspan 8 was found in high metastatic potential HCC cells,and the expression of Tspan 8 in HCC tissues was much higher than that in the matched nontumorous tissues. Down-regulation of Tspan 8 had no influence on the proliferation of HCC cells (P＞0.05),while it inhibited the expression of ADAM12 and the invasive ability of HCC cells (P＜0.01,P＜0.01 respectively).Conclusion Tspan 8 played an important role in invasion and metastasis of human hepatocellular carcinomas and down-regulation by LV/GFP/Tspan 8 inhibited the invasiveness of human hepatocellular carcinoma cells.

The effects of in vivo local expression of recombined human tissue-type plasminogen activator (t-PA) gene on the thrombosis and neointima formation of vein grafts were explored. Jugular vein-to-artery bypass grafting was performed on 72 New Zealand white rabbits. The rabbits were divided into 3 groups according to the different processing methods: transfected t-PA gene group (n = 24), vector group (n = 24) and blank control group (n = 24). Samples of vein grafts were harvested at different time points after surgery. The expression of t-PA gene in vein graft was detected by RT-PCR and the synthesis of t-PA protein by Western-Blot assay. The t-PA activity was measured by chromogenic substrate assay. The Cr51 labeled platelets accumulation in vein grafts was counted. The histopathological changes were compared in intima hyperplasia index among the three groups after operation. The results showed that at the 2nd, 5th, 14th and 28th day after operation, RT-PCR and Western-blot confirmed the expression of t-PA mRNA and protein at the site of gene transfer. The t-PA activity detected on the 2nd, 5th, 14th and 28th day in experimental group was 370.63 +/- 59.44, 344.13 +/- 48.47, 252.87 +/- 51.80 and 161.75 +/- 68.94 U/g respectively, and disappeared on the 60th day and undetected in the control groups. The number of platelets accumulated in the vein grafts in gene group, vector group and blank control group was (85.04 +/- 21.58) 10(6), (225.87 +/- 85.13) 10(6) and (211.7 +/- 78.02) 10(6) respectively. The number of platelets accumulated in gene group was significantly fewer than that in the control groups. Morphometric analysis revealed that intimal hyperplasia was markedly reduced in the t-PA gene group as compared with that in the control groups. It was suggested that the local expression of t-PA gene in vein graft significantly inhibited the accumulation of platelets, thrombosis and concomitant intimal hyperplasia, by which stenosis of bypass graft could be prevented effectively.

Objective To investigate the effect of occult HBV infection (OBI) on carcinogenesis of cryptogenic hepatocellular carcinoma.Methods Samples of hepatocellular carcinoma (HCC) and pericarcinomatous tissues obtained after hepatectomy from January 2011 to November 2013 at the Third Affiliated Hospital of Sun Yat-Sen University were collected.They were divided into two groups:the cryptogenic HCC group (the CH group,n =26) and the HBV related HCC group (the HH group,n =40).These samples were compared with the normal liver tissues obtained in 30 patients.HBV DNA was identified by the nested polymerase chain reaction and the immunohistochemical method was taken to examine the hepatitis B virus X protein (HBx) and Yes-associated protein (YAP) expressions.Results OBI was identified in 20 (77.8％) cryptogenic HCC patients and 8 (26.7％) in the control group.There was a significant difference between the two groups (x2 =14.072,P ＜ 0.05).HBV DNA was detected in all the HBV-related HCC patients.The HBx protein expression was mainly located in the cytoplasm of liver cells and liver cancer cells,but YAP was expressed in the nucleus.Both of them showed diffuse brown or tan particles.In the HH group and the CH group,the positive expression rates of HBx protein in the tumorous tissues were 80.0％ and 90.0％,respectively,and 85.0％ and 82.5％ in the nontumorous tissues,but only in 40.0％ in the control group.The positive expression rates of YAP in the tumorous tissues were 65.0％ and 67.5％,respectively,15.0％ and 20.0％ in the nontumorous tissues,respectively,but only in 12.5％ in the control group.The HBx expression in the cancerous tissues and para-cancerous tissues of the HH group and the CH group showed no significant difference (P ＞ 0.05),but the YAP expression in the tumor tissues was significantly higher than that in the nontumorous tissues (P ＜ 0.05).The HBx and YAP expressions in the HH group were comparable to the CH group (P ＞ 0.05).However,their expressions in the cancerous tissue of the HH group and the CH group were significantly higher than in the normal liver tissues (P ＜ 0.05).Conclusion A high prevalence of HBV infection was observed in HBsAg-negative HCC and the high expressions of HBx and YAP might be involved in the process of cryptogenic hepatocellular carcinoma.

Objective Total aortic arch replacement and stented elephant trunk surgery is an important surgical method for acute type A aortic dissection, and the short, middle, long term curative effect has been recognized by more and more experts at home and abroad.Circulatory arrest was an independent risk factor for postoperative complications and mortality in patients with type A aortic dissection.The aim of this article is to observed the effection of a new technology to block aortic arch, whicn can shorten the circulatory arrest time to 2 minutes and avoid harm of circulatory arrest on patients.Methods From May 2016 to February 2017, 68 patients with acute type A aortic dissection were divided into the conventional group and the modified group.All the patients underwent total arch replacement and stented elephant trunk surgery.The rectal temperature of the conventional group was 25℃ and circulatory arrest time was 20 min.While the rectal temperature of the modified group was 28℃ and and circulatory arrest time was 2 min.Results In the conventional operation group, 3 patients died after operation while all the patients in the modified group were cured and discharged.There are no differences between the two groups in the time of cardiopulmonary bypass(CPB) and heart arrest time(P>0.05).There are Significant differences in CPB time, circulatory arrest time, postoperative awake time, intubation time, amount of blood used, the amount of drainage during the first two days after operation, the time staying in ICU and the postoperative time in hospital.And the modified group was much better.(P<0.05)Conclusion The results of new technology blocking aortic arch in the patients with acute type A aortic dissection are better than the conventional surgical approach during the perioperative period.This technology is simple and effective.It is worth promoting.

Objective To investigate the role of transmembrane protein C0-029 in epithelial mesenchymal transition (EMT) induced by tumor necrosis factor alpha (TNFα) of intrahepatic cholangiocarcinoma (ICC) cells.Methods RT-PCR and Western blot were conducted to detect the CO-029 expression in ICC cells and tissues.The effect of CO-029 silencing by lenti-virus on EMT induced by TNFα was investigated.Western blot and mass spectrometry after immunoprecipitation were used to confirm whether TNFαR1 can directly or indirectly bind with CO-029 to form complexes in ICC.Results Differential expression of CO-029 was observed in ICC cells and tissues.The expression of CO-029 was significantly reduced by lenti-viral interference in ICC cells,resulting in the failure of TNFα to induce EMT.TNFαR1 in ICC could directly or indirectly form complexes with CO-029.Conclusion CO-029 mediates TNFα/TNFαR1 induced EMT in ICC,which might play an important role in the invasion and metastasis.

Objective To investigate the expressions of tetraspanin CO-029 in intrahepatic cholangiocarcinoma (ICC) and to find out their clinical significance.Methods RT-PCR and western blot were used to detect the expressions of CO-029 in ICC and their matched para-tumorous tissues from 20 patients with ICC,as well as in the HCCC-9810 cell lines.The expressions of CO-029 were further detected via tissue microarray (TMA) in the pathological specimens of 40 patients with ICC.Correlations between the expressions of CO-029 and the clinicopathologic features and prognosis were analyzed.Results A high level of CO-029 was detected in the 20 patients with ICC and the HCCC-9810 cell lines via western blot and RTPCR.Moreover,the expression levels of CO-029 in the ICC tissues were higher than the matched para-tumorous tissues (P ＜ 0.05).TMA detection revealed the positive expression rate of CO-029 to be 65％ (26/40).The expression level of CO-029 was much higher in the early recurrence group (Time to recurrence,TTR ＜ 1 year) than the non-recurrence group (TTR≥ 1 year).On analysis,the correlations were significant between the expressions of CO-029 and tumor encapsulation,hilar lymph node metastasis,TNM stage and prognosis (P ＜0.05).Conclusions CO-029 was highly expressed in ICC.It had close correlations with recurrence,metastasis and prognosis of patients with ICC.

Objective To study the management of vascular injury.Methods Retrospective analysis was made on the clinical data of 59 cases of vascular injury,including 55 cases of vascular injury in neck and(extremity) and 4 cases of portal vein and vena cava injury.Among them,21 cases had femoral artery injury with infection and 4 cases had vascular injury due to intervention therapy.All patients with vascular wound of extremity or neck had undergone hemostasis by compression and antishock treament before hospital admission.All cases of femoral artery injury with infection underwent hemostasis by arterial ligation and incision and(drainage) of abscess.Vascular anastomosis was performed in 11 cases,vascular grafting in 12 cases,and(vascular) repair in 14 cases.Results There were 2 deaths.5 cases had amputation(including a case of(femoral) embolism due to intervention trerapy).Postoperative intermittent claudication,decreased skin(temperature) and other signs of ischemia occurred in 21 cases of femoral artery injury with infection,but none developed limb gangrene. The other cases were discharged in good health.Conclusions In the treatment of vascular injury,wound hemostasis and antishock treatment should be done first to save the patient′s life and the management of the vascular injury depends on the situation,with the aim to try by all means to save the extremity.Vascular reconstruction is the main method for treatment of vassular injury.Vascular ligation can be done in cases of femoral artery injury with infection.

To develop a more efficient antithrombotic way after coronary artery bypass grafting (CABG), the anticoagulant effects were compared of human tissue factor pathway inhibitor (TFPI) gene transfection and aspirin oral administration (traditional method) on vein grafts. An eukaryotic expression plasmid pCMV-(Kozak) TFPI was prepared. Animal model of carotid artery bypass grafting was constructed. In operation, endothelial cells of vein grafts in TFPI group and empty plasmid control group were transfected with pCMV-(Kozak) TFPI and empty plasmid pCMV respectively, while no transfection was conducted in aspirin control group. After operation, aspirin (2 mg.kg(-1).(-1)) was administered (i.g.) in aspirin control group. Three days later, grafts (n=10) were harvested for RT-PCR, Western blotting and immunohistochemical analyses of exogenous gene expression and for pathological, scanning electron microscopic observation of thrombus. Thirty days later, the patency rates of remnant grafts (n=10) were recorded by vessel Doppler ultrasonography. Human TFPI gene products were detected in gene transferred vein grafts. Three days later, thrombi were found in 7 animals of aspirin control group and in 8 animals of empty plasmid control group, but in only 1 of TFPI group (P<0.01). Thirty days later, 5 grafts were occluded in empty plasmid control group, but none of grafts was occluded in the other groups (P<0.05). The endothelial surfaces of grafts in both of the control groups were covered with aggregated erythrocytes and platelets, and it were not seen in TFPI group. It was suggested that the anticoagulant effects on vein grafts of human TFPI gene transfection are better than those of aspirin.
Administration, Oral ; Anticoagulants/*metabolism ; Aspirin/*administration & dosage ; Aspirin/metabolism ; Coronary Artery Bypass ; Disease Models, Animal ; Lipoproteins/*metabolism ; Plasmids/metabolism ; Tissue Transplantation/*methods ; Transfection ; Ultrasonography, Doppler/methods ; Veins/*transplantation ; Venous Thrombosis/metabolism

Objective To summarize the experience in the diagnosis and treatment of hepatic trauma. Methods The clinical data of 260 patients with hepatic trauma admitted from January 1988 to December 2007 were retrospectively reviewed with regard to degree of trauma, treatment methods, therapeutical effects, complications and SO on. Results One hundred and fifty-three eases were treated by operative management,1 07 cases by nonoperative management.236 cases were cured,24 cases died,and the case fatality rate was 10.2%.There were no death among 139 patients with hepatic trauma grades Ⅰ～Ⅱ,22 death among 119 grades Ⅲ～Ⅴ patients, all death of 2 in grade VI, which demonstrated the correlation between death and hepatic trauma grade was statistically significant. Complications appeared in 82 eases, mainly including Secondary hemorrhage, abdominal infection and so on. Conclusions Nonoperative management is suitable for hepatic trauma with stable hemodynamics. Operative management is rapidly selected when the hemodynamics aren't stable. The cooperation of many specialities can enlarge the application of nonoperative management and decrease complications.