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乏氧是影响肿瘤微环境的重要因素之一,是恶性肿瘤的标志,其可通过多种机制使肿瘤细胞适应所处的环境,具有更强的生存能力和侵袭性,并对放疗产生抵抗。血管生成素样蛋白(angiopoietin-like proteins,ANGPTLs)被认为是调控血管生成的决定性因子,其作为炎症致癌介质,以自分泌和旁分泌的方式参与血管生成、慢性炎症发生和肿瘤发生发展的不同阶段。虽然ANGPTLs在肿瘤中的作用尚未完全阐明,但越来越多的证据表明,其在几种侵袭性实体肿瘤中普遍高表达,且在肿瘤细胞的增殖和侵袭中起关键作用[1]。鉴于ANGPTLs在肿瘤细胞和肿瘤微环境中的作用,其具有成为预测肿瘤及其治愈后的生物标志物的潜力,并可作为肿瘤治疗的新靶点。此外,ANGPTLs可能在乏氧诱导的辐射抵抗中发挥重要作用,从而影响肿瘤的治疗效果。本文就ANGPTLs家族的生物学特性、在肿瘤发展以及肿瘤乏氧微环境中可能的作用进行概述。
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