非小细胞肺癌外周血树突状细胞含量与血管内皮生长因子浓度的关系

Decline of dendritic cells in the peripheral blood of patients with non-small cell lung cancer and its relation to vascular endothelial growth factor

目的 检测非小细胞肺癌 (NSCLC)外周血树突状细胞 (DC)含量和血管内皮生长因子 (VEGF)水平 ,探讨二者间的相互关系。方法 采用流式细胞技术对 5 5例NSCLC、13例肺部良性病变及 12例正常人外周血DC含量进行检测 ,并用ELISA法检测血浆VEGF浓度。结果 肺部良性病变者的外周血DC含量和VEGF浓度与正常人相比无显著差异 (P >0 .0 5 ) ,但NSCLC患者外周血DC含量显著降低 ,而血浆VEGF浓度显著增高 (P <0 .0 5～ 0 .0 1)。NSCLC外周血DC含量及VEGF浓度与性别、年龄、病理类型及分化程度无明显关系 ,但与临床分期和淋巴结转移有密切关系 (P <0 .0 5 )。外周血DC含量与VEGF浓度呈负相关。结论 NSCLC外周血DC含量降低和VEGF浓度增高与肺癌恶性程度有密切关系。NSCLC过表达VEGF可能是导致DC分化受阻的主要原因之一。

Objective To detect dendritic cells (DC)in the peripheral blood and plasma concentration of vascular endothelial growth factor (VEGF) of patients with non small cell lung cancer (NSCLC) and to evaluate their relationship. Methods The quantitation of DC in the blood was performed in 55 patients with NSCLC, 13 patients with pulmonary benign diseases, and 12 healthy volunteers by a novel flow cytometric assay. The concentration of VEGF in the plasma was measured by ELISA kit. Results No significant difference was found in the levels of DC and VEGF between the patients with pulmonary benign diseases and healthy volunteers (P>0.05). In comparison with subjects of healthy volunteers and pulmonary benign diseases, the level of DC was significantly decreased, while that of VEGF was significantly increased in the patients with NSCLC(P<0.05 to 0.01). The levels of DC and VEGF in the peripheral blood of NSCLC were closely associated with TNM stages and lymph node metastasis. However, no correlation was found among the levels of DC and VEGF and age, gender, cell differentiation and histologic classification. There was a negative correlation between the VEGF concentration and the DC counts. Conclusion The decline of DC count in peripheral blood and the enhancement of plasma VEGF are remarkably related to the malignancy of NSCLC. And VEGF overexpression may be one of mechanisms of DC maturation and differentiation inhibition in patients with NSCLC.