Tyrosine kinase A and vascular endothelial growth factor receptor 2 in the invasion and metastasis of salivary adenoid cystic carcinoma / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To determine the effect of tyrosine kinase A (TrkA) and vascular endothelial growth factor receptor 2 (VEGFR2) in the invasion and metastasis of salivary adenoid cystic carcinoma (SACC).</p><p><b>METHODS</b>The expression of TrkA and VEGFR2 were detected by immunohistochemical staining in 47 cases of SACC of salivary glands. Clinical data were reviewed by multivariate prognostic analysis.</p><p><b>RESULTS</b>The positive rate of TrkA and VEGFR2 in SACC was 87.23% (41/47) and 85.11% (40/47) respectively. Express of TrkA and VEGFR2 in perineural invasion and recurrence group were higher than non-perineural invasion and non-recurrence group. Significant difference was found in microvessel density (MVD) and VEGFR2 expression within different groups (P < 0.05). MVD in perineural invasion group (25.14 +/- 2.83) was significantly higher than that in none perineural invasion group (18.81 +/- 1.33) (P < 0.05). MVD in recurrence or metastasis group (26.58 +/- 2.38) was significantly higher than that (19.06 +/- 1.39) in none recurrence nor metastasis group (P < 0.05).</p><p><b>CONCLUSION</b>Positive correlation between expression of TrkA, VEGFR2 and nerve invasion and vessel metastasis of SACC indicate that TrkA and VEGFR2 play important roles in the invasion and metastasis of SACC. It is possible that TrkA and VEGFR2 could be an aid for evaluating the prognosis of SACC patients.</p>

Correlation between prognosis and cell proliferation, apoptosis in squamous cell carcinoma of tongue / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To study the correlation between prognosis and cell proliferation, apoptosis in squamous cell carcinoma (SCC) of tongue.</p><p><b>METHODS</b>Using TdT-mediated dUTP biotin nick end labeling (TUNEL) for cell apoptosis and immunohistochemical staining for proliferating cell nuclear antigen (PCNA), Bcl-2 and Bax protein expression.</p><p><b>RESULTS</b>In SCC of tongue, the positive rates of apoptosis index (AI), Bcl-2, Bax and PCNA were 55.8%, 65.4%, 73.1% and 100.0% respectively. In the univariate Kaplan-Meier analysis, low expression of Bax, high expression of PCNA, Bcl-2/Bax expression ratio > 1 and high staging were all associated with lower survival rate (Log-rank test, P < 0.05, respectively), AI was only correlated with grading. Bcl-2 did not show a significant association with all features.</p><p><b>CONCLUSIONS</b>The levels of Bax and PCNA expression and Bcl-2/Bax expression ratio have independent prognosis value in squamous cell carcinoma of the tongue. Comprehensive analysis of these parameters can be helpful to identify biological behavior and predict more accurately the prognosis of patients of tongue squamous cell carcinoma.</p>