Correlation between the vascular endothelial growth factor C expression and lymph node metastasis in human nasopharyngeal carcinoma / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To detect the expression of vessel endothelial growth factor C (VEGF-C) and microlymphatic vessel density (MLVD) and probe the relationship between lymphangiogenesis and lymph node micrometastasis in nasopharyngeal carcinoma.</p><p><b>METHODS</b>The expression of VEGF-C, was evaluated in 58 cases with nasopharyngeal carcinoma and 20 samples of nasopharyngitis tissues by immunohistochemical staining SP methods. The MLVD in tumor was counted by immunostaining with the specific antibody lymphatic vessel endothelial hyaluronic acid receptor 1 and analyzed with clinicopathologic parameters.</p><p><b>RESULTS</b>The positive rate of VEGF-C was 84.5% and 15.0% respectively in nasopharyngeal carcinoma and nasopharyngitis tissues, there was significant difference between them (chi2 = 32.309, P <0.01). The microlymphatic vessel density was (28.6 +/- 6.2) pieces per field and (10.5 +/- 3.0) pieces per field respectively in nasopharyngeal carcinoma and nasopharyngitis tissues, there was significant difference between them (t = 12.491, P <0.01). The expression of VEGF-C and the MLVD were significantly higher in nasopharyngeal carcinoma and in lymph node metastasis group than in no-metastasis group. The expression of VEGF-C was positively correlated with MLVD (t =3.512, P <0.01), lymph node metastasis (chi2 =7.715, P <0.01, r =0.712) and clinical stage (chi2 =4.250, P <0.05, r =0.481).</p><p><b>CONCLUSIONS</b>In nasopharyngeal carcinoma, the expression rate of VEGF-C was high. VEGF-C expression was positively correlated with MLVD and lymph node metastasis and tumor staging. It was explained that VEGF-C attached itself to the emergence and infiltration and transfer of NPC. There was close correlation between the expression of VEGF-C and MLVD. It was explained that the expression of VEGF-C in NPC was correlated to neoplasm lymphangiogenesis and that VEGF-C played a vital role in the progression of NPC. VEGF-C was likely to a potential target of anticancer therapy.</p>

The Preliminary Study of Trace Elements in the Hair of Patient With Massive Osteolysis / 环境与健康杂志

Objective To have knowledge of the exact cause of massive osteolysis. Methods Hair of patients from Xinjiang province was collected and 14 trace elements were determined by inductively coupled plasma mass spectrometryICP-MS. Results Trace elements imbalance in the body of patients was disturbed. Chromium and zinc which are benefit to the growth of the bones were only 0.5 ?g/g and 40 ?g/g respectively that were much lower compared with the healthy persons cadmium was much higher than the limit level in healthy person. Moreover the quantity and ratio of potassium and sodium in the patients were obvious abnormal. Conclusion According to the result of the present paper may be the environmental and dietary factors play an important role in pathogenesis of this disease.