胶质瘤血管新生及其调控机制

体内外研究表明实体性肿瘤的生长是依赖血管的，其直径一旦超过2 mm，若没有新生的血管供血则肿瘤的生长就会停止。胶质瘤是人体内血管化程度最高恶性的肿瘤之一。胶质瘤的血管发生与其他实体性肿瘤血管发生一样，由血管形成及血管新生两种方式构成：前者由内皮祖细胞或者血管母细胞形成新的血管；而后者是由组织中既存的成熟血管的内皮细胞发生增殖和游走形成小血管。血管新生是肿瘤血管生成的主要形式，胶质瘤血管新生的机制研究以及抑制其血管生成是胶质瘤治疗的一个新途径，成为近年来的研究热点，本文就胶质瘤血管新生及其调控机制作一综述。

Angiogenesis and the regulation mechanism in glioma

Studies in vitro show that the growth of solid tumor is vessel dependent. Solid tumor usually stops growing when its diameter is over 2 mm due to lack of new vessel to supply blood. Glioma is one of the most malignant tumor in vascularization. As a solid tumor, the vascularization in glioma also includes vasculogenesis and angiogenesis. Vasculogenesis is defined as the differentiation of precursor cells (angioblasts) into endothelial cells and the de novo formation of a primitive vascular network, whereas angiogenesis is defined as the growth of new capillaries from pre-existing blood vessels. Angiogenesis, which plays a significant role in the development of tumor, has become a new target for the prognostic evaluation and therapy of glioma. Recently, the research in exploring the mechanism of angiogenesis has attracted great attention.