[Expression and significance of vascular cell adhesion molecule-1 in human oral squamous cell carcinoma].

OBJECTIVE: To study the expression and the location of vascular cell adhesion molecule-1 (VCAM-1) gene and its clinical significance in human oral squamous cell carcinoma (OSCC). METHODS: In situ hybridization, PV-9000 polymer detection system for immunohistochemical staining was used to detect the expression and the location of VCAM-1 mRNA and VCAM-1 protein in 48 cases of OSCC and 10 cases of normal controls. Statistical analysis was performed using chi-square test in SPSS 13.0. RESULTS: VCAM-1 protein was mainly expressed in tumor cell cytoplasm and membrane, VCAM-1 mRNA was mainly expressed in tumor cell cytoplasm. The expression rate of VCAM-1 mRNA and VCAM-1 protein was significantly higher in OSCC than that in normal oral mucosa (P<0.01). The expression of VCAM-1 mRNA was positively correlated with that of VCAM-1 protein (P<0.01). In the clinicopathologic factors, lymph node metastasis and depth of infiltration were closely correlated with VCAM-1 expression (P<0.01). The expression of VCAM-1 was significantly higher in tumor with lymph node metastasis than in tumor without lymph node metastasis (P<0.01). CONCLUSION: Overexpression of VCAM-1 gene in OSCC may play a potential role in the development of OSCC. The overexpression of VCAM-1 gene in OSCC may be related to the tumor infiltration and metastasis.

[Correlations between the expression of vascular cell adhesion molecule-1 gene and clinical pathological characteristics and angiogenesis in oral squamous cell carcinoma].

PURPOSE: To investigate the correlations between the expression of vascular cell adhesion molecule-1 (VCAM-1) gene and clinicopathologic characteristics and microvessel density (MVD) in oral squamous cell carcinoma (OSCC). METHODS: Expression and location of VCAM-1mRNA and protein in 48 OSCCs and 10 normal controls were detected by in situ hybridization and immunohistochemical stainingìMVD was also assessed. Statistical analysis was performed using SPSS13.0 software package for Student's t test and Chi-square test. RESULTS: VCAM-1mRNA was mainly detected in cytoplasm of OSCC.VCAM-1 protein was mainly detected in membrane and cytoplasm of OSCC. The expression of VCAM-1mRNA and protein were significantly higher in OSCC tissues than normal oral tissues (P<0.01). In the clinicopathologic factors, lymph node metastasis and depth of infiltration were closely correlated with VCAM-1 expression (P<0.01), but there was no significant correlation between the positively expression and patients' sex, age and tumor' differentiated degree (P>0.05). CONCLUSIONS: Overexpression of VCAM-1 gene in OSCC may play a potential role in the development of OSCC.It is closely associated with lymph node metastasis and the angiogenesis.

[Use of allogenic acellular dermal matrix combined with autologous epidermal cells for the repair of tissue defect].

OBJECTIVE: To investigate a method for the repair of tissue defect. METHODS: Allogenic acellular dermal matrixes (ADM) were implanted to full-thickness skin defects made on the dorsa of rats. Two weeks later, autologous suspended epidermal cells were transplanted on to the surface of vascularized ADM. Respectively, neoepidermis was macroscopically observed 2, 3, 5 weeks after grafting, and samples were taken to make routine paraffin sections for microscopical examination, and immunohistochemical staining for type IV collagen was also performed. RESULTS: The vascularized ADM could support proliferation and differentiation of epidermal cells, and also could promote the formation of dermal-epidermal junction. Suspended epidermal cells in an artificial culture system in vivo could develop into mature epidermis. The reconstructed skin not only looked like the normal one in appearance in which hair was removed, but also revealed a better function. CONCLUSIONS: Full-thickness skin defect can be repaired by transplanting autologous epidermal cell suspension on to vascularized ADM.