Abstract
背景与目的血管内皮抑素可以抑制肿瘤新生血管的生成,但对肿瘤微淋巴管的形成与发展是否存在抑制效应引起我们关注。本研究旨在探讨重组人血管内皮抑素(recombinant human endostatin injection)对非小细胞肺癌组织中血管内皮生长因子(vascular endothelial growth factor, VEGF)-C、VEGF-D和VEGF受体(VEGFR)-3表达及对外周血循环肿瘤细胞数目的影响。方法荷瘤裸鼠随机分为空白对照组、顺铂组、不同浓度重组人血管内皮抑素组及重组人血管内皮抑素+顺铂组,连续给药2周。1周后检测肿瘤组织中VEGF-C、VEGF-D、VEGFR-3的表达水平和微淋巴管密度。免疫荧光染色诊断和计数循环肿瘤细胞。结果重组人血管内皮抑素组与重组人血管内皮抑素联合顺铂组的表达阳性率、微淋巴管密度均明显低于空白对照组与顺铂组(P < 0.05);较高浓度的重组人血管内皮抑素联合顺铂组与重组人血管内皮抑素组表达阳性率和微淋巴管密度低于相应较低重组人血管内皮抑素浓度的组别(P < 0.05)。各组微淋巴管密度与VEGF-C、VEGF-D、VEGFR-3表达阳性率存在正相关。重组人血管内皮抑素联合顺铂各组的循环肿瘤细胞数目明显低于单独使用顺铂或重组人血管内皮抑素(P < 0.05)。结论重组人血管内皮抑素可以抑制肿瘤新生淋巴管生成,减少循环肿瘤细胞,作用大小与浓度有关。与顺铂联合使用能够更有效的减少循环肿瘤细胞。
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