Zheng-Jun Shang

Publications (2)3.58 Total impact

• Article: [Experimental study on ectopic prefabrication of vascularized mandible graft with autogenous ribs.]

  Xiang Wang, Zhe Shao, Han-Zhong Zhang, Fei Zhu, Hui Shen, Zheng-Jun Shang
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  ABSTRACT: OBJECTIVE: To explore a method for ectopic prefabrication of mandible with vascular pedicle. METHODS: Cancellous bone blocks harvested from the dog ribs were packaged with mandible-shaped titanium mesh scaffold and implanted into latissimus dorsi of dog with thoracodorsal artery and vein through the scaffold. After 12 weeks, bone formation and vascularization were evaluated by gross inspection, histological examination and immunohistochemistry. RESULTS: Vascularized mandible with thoracodorsal artery and vein were formed and histological staining and immunohistochemisty confirmed new bone formation and vascularization. CONCLUSIONS: There is feasibility for ectopic prefabrication of vascularized mandible graft using cancellous ribs, which provides a new method for mandibular defect reconstruction.Experimental study on ectopic prefabrication of vascularized mandible graft with autogenous ribs.
  Zhonghua kou qiang yi xue za zhi = Zhonghua kouqiang yixue zazhi = Chinese journal of stomatology 09/2012; 47(9):544-546.
• Article: Tumor necrosis factor-α enhanced fusions between oral squamous cell carcinoma cells and endothelial cells via VCAM-1/VLA-4 pathway.

  Kai Song, Fei Zhu, Han-zhong Zhang, Zheng-jun Shang
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  ABSTRACT: Fusion between cancer cells and host cells, including endothelial cells, may strongly modulate the biological behavior of tumors. However, no one is sure about the driving factors and underlying mechanism involved in such fusion. We hypothesized in this study that inflammation, one of the main characteristics in tumor microenvironment, serves as a prominent catalyst for fusion events. Our results showed that oral cancer cells can fuse spontaneously with endothelial cells in co-culture and inflammatory cytokine tumor necrosis factor-α (TNF-α) increased fusion of human umbilical vein endothelium cells and oral cancer cells by up to 3-fold in vitro. Additionally, human oral squamous cell carcinoma cell lines and 35 out of 50 (70%) oral squamous carcinoma specimens express VLA-4, an integrin, previously implicated in fusions between human peripheral blood CD34-positive cells and murine cardiomyocytes. Expression of VCAM-1, a ligand for VLA-4, was evident on vascular endothelium of oral squamous cell carcinoma. Moreover, immunocytochemistry and flow cytometry analysis revealed that expression of VCAM-1 increased obviously in TNF-α-stimulated endothelial cells. Anti-VLA-4 or anti-VCAM-1 treatment can decrease significantly cancer-endothelial adhesion and block such fusion. Collectively, our results suggested that TNF-α could enhance cancer-endothelial cell adhesion and fusion through VCAM-1/VLA-4 pathway. This study provides insights into regulatory mechanism of cancer-endothelial cell fusion, and has important implications for the development of novel therapeutic strategies for prevention of metastasis.
  Experimental Cell Research 06/2012; 318(14):1707-15. · 3.58 Impact Factor