Yan Chen

Publications (3)0.86 Total impact

• Source

  Available from: cmj.org

  Article: Role of dissection of secondary branches of splenic pedicle in portal hypertension cases undergoing splenectomy.

  Ying-bin Liu, Ying Kong, Xu-an Wang, Jian-wei Wang, Jiang-tao Li, Yong Wang, Yan Chen, De-qing Chen, Wei-hong Weng, Zhi-ping Zhang, Xiang-song Wu, Xiao-zhou Fei, Zhi-wei Quan, Song-gang Li, Ji-yu Li, Li-ping Cao, Shu-you Peng
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  ABSTRACT: It is well known that conventional splenectomy, which requires careful handling and ligation of tissue of the splenic hilum, can easily cause complications such as splenic fever and pancreatic fistula. Here, we use the technique of dissection of the secondary branches of the splenic pedicle to handle the hilum in the portal hypertension patients who are subjected to splenectomy. We retrospectively compared and analyzed the complications, postoperative hospital stay, operative time, and occurrence of hemorrhage in 121 patients with portal hypertension undergoing splenectomy and devascularization of the gastric cardia from January 1999 to December 2007. The selected cases consisted of 51 patients undergoing conventional splenectomy and 70 patients undergoing dissection of secondary branches of the splenic pedicle. In addition, we analyzed the relationship between size of the spleen and occurrence of complications. The incidence of pancreatic fistula and splenic fever (0/70 and 9/70) was lower in patients undergoing dissection of secondary branches of the splenic pedicle as compared with that of the conventional group (5/51 and 18/51 respectively). In addition, there was no significant difference in operative time and volume of blood loss between two groups. The spleen thickness of those patients who had pancreatic fistula and splenic fever was significantly greater than those without complications. These results indicate that dissection of secondary branches of the splenic pedicle in portal hypertension patients undergoing splenectomy can decrease the incidence of splenic fever and pancreatic fistula, and shorten the postoperative hospital stay, especially in the patients with a large spleen. So dissection of secondary branches of the splenic pedicle is a valuable technique for splenectomy.
  Chinese medical journal 12/2008; 121(22):2250-3. · 0.86 Impact Factor
• Article: [Effects of vascular endothelial growth factor (VEGF) antisense oligodeoxynucleotide on mRNA and expression of VEGF, flt-1, and kinase insert domain containing receptor and VEGF excretion in human gallbladder carcinoma cells].

  He-Qing Fang, Hai-Jun Li, Ying-Bin Liu, Xu-An Wang, Xiao-Ming Ma, Ying Kong, Yan Chen, De-Qin Chen, Wei-Hong Weng, Zhi-Ping Zhang, K-R Devkota, Jian-Wei Wang, Jiang-Tao Li, Li-Ping Cao, Shu-You Peng
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  ABSTRACT: To investigate the effects of vascular endothelial growth factor (VEGF) antisense oligodeoxynucleotide (ASODN) on the mRNA and protein expression of VEGF, Flt-1, and kinase insert domain containing receptor (KDR) and VEGF excretion in human gallbladder carcinoma cells. Human gallbladder carcinoma cells of the line GBC-SD were cultured and transfected with VEGF ASODN and sense oligodeoxynucleotide (SODN) mediated by Oligofectamine. The toxicity of SODN and Oligofectamine to the GBC-SD cells was examined by MTT method. RT-PCR was used to detect the mRNA and expression of VEGF, Flt-1, and KDR, and ELISA was used to detect the protein expression of VEGF. MTT method showed that SODN and Oligofectamine were not toxic to the GBC-SD cells. The mRNA expression levels of VEGF, Flt-1, and KDR of the ASODN and ASODN + Oligofectamine groups were all significantly lower than those of the control group (all P < 0.05), and were the lowest 72 hours after transfection, and then gradually increased. ELISA showed that there were not significant differences in the VEGF protein concentration in the supernatant of the GBC-SD cells among the SODN, SODN + Oligofectamine, and control groups (all P < 0.05), however, the VEGF protein concentration in the supernatant of the GBC-SD cells of the ASDN and ASDN + Oligofectamine groups were significantly lower than that of the control group (both P < 0.05). VEGF ASODN inhibits the mRNA and protein expression of VEGF, Flt-1, and KDR and VEGF excretion in human gallbladder carcinoma cells. Oligofectamine strengthens the effect of ASODN.
  Zhonghua yi xue za zhi 12/2007; 87(47):3329-34.
• Article: [Mesenchymal stem cells inhibit the expression of CD25 on phytohaemagglutinin-activated lymphocytes].

  Ying-bin Liu, Hao-ran Qian, De-fei Hong, Jian-wei Wang, Jiang-tao Li, Xu-an Wang, Ying Kun, Xiao-ming Ma, Yan Chen, De-qin Chen, Wei-hong Weng, Shu-you Peng
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  ABSTRACT: To investigate the regulatory effects of rat mesenchymal stem cell (MSC) on T lymphocyte proliferation by examining the early activated markers such as CD25 and CD69. MSC had been isolated and expanded in vitro. Then it was identified by cell morphology, membrane phenotype, and differentiation potential. Nylon wool column was applied to purify T-lymphocytes. MSCs and T-lymphocytes were cultured together and were stimulated by phytohaemagglutinin (PHA), and then the expressions of CD25 and CD69 were assessed. The levels of TGF-beta1 and IL-10 in the supernatants of MSC cultures were detected by using ELISA. (1) The expression of CD25 is suppressed in a dose-dependent manner when the T-lymphocytes are co-cultured with 10,000 MSCs or more, while 100 MSCs have no detectable effect; (2) The suppression of CD25 can be lasted more than 96 hrs; (3) The down regulation of CD25 is mediated by some soluble factors; (4) The reduced expression of CD25 caused by MSC inhibition is not mediated by TGF-beta1 and IL-10. MSCs have significant immune regulatory effects on PHA-stimulated T-lymphocyte culture. It might provide a remarkable immune suppression in organ-transplantation to achieve better outcome in the near future.
  Zhonghua yi xue za zhi 09/2007; 87(30):2136-9.