Yue-chun Shen

Guangdong Medical College, Shengcheng, Guangdong, China

Are you Yue-chun Shen?

Claim your profile

Publications (5)2.37 Total impact

  • Yue-chun Shen · Bi-hui Luo · Bi-ru Ou · Ai-lan Chen · Xiao-ming Wang · Jun Li
    [Show abstract] [Hide abstract]
    ABSTRACT: To investigate the interaction of deficiency in thrombosis-related gene in a mouse model. To generate mice carrying mutations in alpha-galactosidase A (Gla) and factor V Leiden (Fvl) and analyze the phenotypes, namely, tissue fibrin deposition and thrombus formation in organs. Fibrin deposition in organs of mice carrying both mutations in Gla and Fvl was significantly increased compared with that in mice with single mutaton: [Gla(-/0) Fv(Q/Q)+Gla(-/-)Fv(Q/Q)] vs.[Gla(-/0)Fv(+/+)]=(0.28+/-0.03)% vs.(0.07+/-0.007)%, P<0.01; [Gla(-/0)Fv(Q/Q)+Gla(-/-)Fv(Q/Q)] vs.[Gla(+/0)Fv(Q/Q)+Gla(+/+)Fv(Q/Q)]=(0.28+/-0.03)% vs.(0.11+/-0.02)%, P< 0.01. Meanwhile, the number of thrombi on organ sections of mice carrying both mutations in Gla and Fvl was significantly increased compared with the single mutation carrier: [Gla(-/0)Fv(Q/Q)+Gla(-/-)Fv(Q/Q)] vs.[Gla(-/0)Fv(+/+)]=1.9+/-0.7 vs. 0.0+/-0.0, P<0.05; [Gla(-/0)Fv(Q/Q)+Gla(-/-)Fv(Q/Q)] vs. [Gla(+/0)Fv(Q/Q)+Gla(+/+)Fv(Q/Q)]=1.9+/-0.7 vs. 0.3+/-0.1, P<0.05. These observations demonstrated that there was synergistic effect in Gla and Fvl deficiency in mice. It suggested that there could be a combination of GLA deficiency and FVL or other thrombosis-related gene defect in patients with genetic severe early-onset thrombosis.
    No preview · Article · Jun 2010 · Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical genetics
  • [Show abstract] [Hide abstract]
    ABSTRACT: To evaluate the role of leptin in neointimal formation and related mechanisms. Femoral arterial injury was induced in wild-type (Wt, n = 10), leptin-deficient (Lep(-)/-, n = 12), and leptin receptor-deficient (LepR(-)/-, n = 10) mice. Leptin treatment studies (tail vein injection of adenovirus expressing murine leptin on the RSV promoter, ad-leptin) were performed on Lep(-)/- (n = 5) and LepR(-)/- (n = 4) mice. Intimal (I) and medial (M) areas were measured and the ratio of I/M was calculated. Smooth muscle cells were detected by smooth muscle alpha-actin staining using an alpha-actin monoclonal antibody. Cellular proliferation was analyzed with BrdU Staining Kit and the number of BrdU-positive cells was counted manually. Plasma leptin level was measured by ELISA. The I/M ratio of Lep(-)/- and LepR(-)/- mice was significantly lower than that in Wt separately (Lep(-)/- vs. Wt = 0.80 +/- 0.14 vs. 1.50 +/- 0.22, P < 0.01; LepR(-)/- vs. Wt = 0.55 +/- 0.20 vs. 1.50 +/- 0.22, P < 0.05). Plasma leptin level was significantly increased in Lep(-)/- and LepR(-)/- mice post leptin treatment. I/M was significantly increased in Lep(-)/- mice receiving ad-leptin compared with untreated Lep(-)/- mice (P < 0.05), while I/M was similar between LepR(-)/- mice with and without ad-leptin treatment (P > 0.05). The changes on number of positive alpha-actin and BrdU stained smooth muscle cells were consistent with the neointimal formation findings in various groups. Mice lacking leptin or the leptin receptor were protected from neointimal formation following vascular injury. Leptin treatment increased neointimal formation in Lep(-)/- but not in LepR(-)/- mice, suggesting leptin receptor activation and vascular smooth muscle cell proliferation played a pivotal role on neointimal formation post-injury in this model, giving an evidence that high plasma leptin level is a risk factor for neointimal formation.
    No preview · Article · Jul 2009 · Zhonghua xin xue guan bing za zhi [Chinese journal of cardiovascular diseases]
  • Yue-Chun Shen · Zhao-Chu He · Ru-Li Cai · Jie-Zhen Pan · Xiao-Ming Wang · Jun Li
    [Show abstract] [Hide abstract]
    ABSTRACT: To evaluate the effect of alpha-galactosidase A (Gla) deficiency on FV Leiden (FVL) associated thrombosis in vivo. To generate the mice carrying mutations in Gla and FVL and analyze the tissue fibrin deposition in organs and thrombosis. In the presence of FVL, Gla deficiency greatly increased tissue fibrin deposition compared with that in wild-type [Gla(-/0) FV(Q/Q) vs. Gla(+/0) FV(Q/Q) = (0.24 +/- 0.07)% vs. (0.086 +/- 0.049)%, P < 0.0001; Gla(-/-) FV(Q/Q) vs. Gla(+/+) FV(Q/Q) = (0.32 +/- 0.03)% vs. (0.06 +/- 0.005)%, P < 0.05]. With Gla deficiency, the number of thrombi on organ sections in FVL mice was significantly increased [(Gla(-/-) FV(Q/Q) and Gla(-/0) FV(Q/Q)) vs. (Gla(+/+) FV(Q/Q) and Gla(+/0) FV(Q/Q)) = 1.9 +/- 0.7 vs. 0.3 +/- 0.1, P < 0.05]. Gla deficiency could be an important genetic modifier for the enhanced thrombosis associated with FVL.
    No preview · Article · Mar 2009 · Zhonghua xue ye xue za zhi = Zhonghua xueyexue zazhi
  • Yue-chun Shen · Dong-feng Lu · Jun Wu · Jie-zhen Pan · Chao-chen Zhao · De-xi Hu · Jun Li
    [Show abstract] [Hide abstract]
    ABSTRACT: Factor V Leiden (FvL) causing activated protein C resistance is a genetic risk factor for venous thrombosis in humans, and it's effect on atherosclerosis is controversial. We evaluated the effect of FvL mutation on atherosclerosis in apolipoprotein E deficient mice fed with normal diet. Degree of atherosclerosis and tissue fibrin deposition were determined in Fv+/+ApoE-/-, FvQ/+ApoE-/- and FvQ/QApoE-/- mice. In the presence of ApoE deficiency, homozygous FvL significantly increased atherosclerosis coverage in ApoE-/- mice (FvQ/QApoE-/- vs. Fv+/+ApoE-/-=5.0%+/-1.1% vs. 2.2%+/-0.4%, P<0.005) and tissue fibrin deposition in atherosclerotic lesion (FvQ/QApoE-/- vs. Fv+/+ApoE-/-=3.4% +/- 0.5% vs. 1.8%+/-0.4%, P<0.05). The atherosclerotic lesion of FvQ/+ApoE-/- mice was intermediate between FvQ/Q ApoE-/- and Fv+/+ApoE-/-, and there was no significant difference comparing with any of them. These observations demonstrate that homozygous FvL could promote atherosclerosis and fibrin deposition in apolipoprotein E deficient mice suggesting that Factor V mutation could be an important genetic risk factor for the enhanced atherosclerosis in human.
    No preview · Article · Feb 2009 · Zhonghua xin xue guan bing za zhi [Chinese journal of cardiovascular diseases]
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: To construct and produce a recombinant bispecific humanized single-chain Fv (sFv) /Interleukin-2 (IL-2) fusion protein by using mammalian cells. The sFv/IL-2 protein was genetically engineered, and transfected to mammalian cells to determine whether the mammalian protein folding machinery can produce and secrete active sFv/IL-2 with high efficiency. The fusion protein was constructed and high efficiently expressed with yields up to 102 +/- 4.2 mg/L in culture supernatant of the stably transfected 293 cell line. This recombinant fusion protein consisted of humanized variable heavy (V(H)) and light (V(L)) domains of monoclonal antibody (mAb) 520C9 directed against the human HER-2/neu (c-erbB2) proto-oncogene product p185, and human IL-2 connected by polypeptide linker. The fusion protein was shown to retain the immunostimulatory activities of IL-2 as measured by IL-2-dependent cell proliferation and cytotoxicity assays. In addition to its IL-2 activities, this fusion protein also possessed antigen-binding specificity against p185, as determined by indirect ELISA using p185 positive SKOV 3ip1 cells. The large-scale preparation of the recombinant humanized sFv antibody/IL-2 fusion protein is performed with 293 cells. The recombinant humanized sFv antibody/IL-2 fusion protein may provide an effective means of targeting therapeutic doses of IL-2 to p185 positive tumors without increasing systemic toxicity or immunogenicity.
    Preview · Article · Jul 2006 · World Journal of Gastroenterology

Publication Stats

5 Citations
2.37 Total Impact Points


  • 2010
    • Guangdong Medical College
      Shengcheng, Guangdong, China
  • 2009
    • Guangzhou First People's Hospital
      Shengcheng, Guangdong, China
  • 2006
    • Concordia University‚ÄďAnn Arbor
      Ann Arbor, Michigan, United States