肿瘤血管生成是肿瘤生长转移的关键步骤，是促血管生成因子和抑制因子作用失衡的结果。
Tumor angiogenesis, resulting from the imbalance of angiogenic cytokines and angiogenesis inhibitors, is crucial for tumor growth and metastasis.
肿瘤细胞释放可溶性的促血管生成因子诱导新生血管生成。
Tumor cells release soluble angiogenic factors inducing neovascularization, a process referred to as the "angiogenic switch".
在一些肿瘤中，它是重要的促血管生成因子。
It has been proved to be a crucial angiogenic factor in certain human tumors.
目的：肿瘤血管生成是肿瘤生长和侵袭的基础，血管内皮细胞生长因子（VEGF）是最重要的血管生成因子，在许多人类肿瘤均可检测到了这种因子。
Objective: Angiogenesis of tumor is the base of tumor growth and invasion. Vascular endothelial growth factor (VEGF) is the most potent angiogenesis factor and has been detected in many human tumours.
目的：肿瘤血管生成是肿瘤生长和侵袭的基础，血管内皮细胞生长因子（VEGF）是最重要的血管生成因子，在许多人类肿瘤均可检测到了这种因子。
Objective: Angiogenesis of tumor is the base of tumor growth and invasion. Vascular endothelial growth factor (VEGF) is the most potent angiogenesis factor and has been detected in many human tumours.
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