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CD13是一种包括967个氨基酸的同源二聚体跨膜糖蛋白, 是锌离子结合金属蛋白酶超级家族的成员之一, 在体内以可溶形式存在。CD13可以催化小肽上NH2残基的脱落, 因此, CD13又名氨基肽酶N(aminopeptidaseN, APN)。CD13/APN具有多种生物活性, 在抗原加工、神经肽和细胞活性因子的降解、细胞周期的控制和分级、肿瘤侵入以及细胞外基质溶解等过程中起着重要作用[1]。CD13最初主要作为粒细胞谱系的特异性标志物, 用于人类白血病的分级。近年来的研究发现, CD13/APN作为血管发生信号的受体, 在血管发生过程中活化、表达上调, 调节血管发生信号进而调节血管生成[2-3]。CD13/APN在新生血管内皮细胞中的特异性表达为CD13抑制剂、CD13配体及CD13单克隆抗体提供了特异性受体。新生血管在各种炎症和肿瘤的发生、发展过程中起支持作用, 靶向示踪CD13/APN对新生血管所支持的疾病的诊断和治疗提供了新的手段。
CD13/氨基肽酶N在新生血管成像中的应用价值
The application of CD13/aminopeptidase N in the angiogenesis imaging
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摘要: 新生血管的发生在恶性肿瘤发生、发展和转移过程起着关键作用。CD13是人类白血病分级的重要谱系特异性标志物,在新生血管内皮细胞上特异性高表达,在静止血管内皮细胞上不表达。利用荧光、核素标记或磁性纳米颗粒耦联CD13单克隆抗体、配体,通过分子成像技术可有效探测新生血管的发生,为研究血管相关疾病的发生、发展提供影像学依据;CD13的配体——天冬氨酸-甘氨酸-精氨酸与各种抗肿瘤药物构成复合物,然后转运到肿瘤新生血管内皮细胞表面与CD13结合,释放抗肿瘤药物治疗肿瘤。CD13在与新生血管相关的各类疾病的认识、诊断、治疗的研究中有着突破性进展和良好的前景。
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关键词:
- 新生血管化, 病理性 /
- 抗原, CD13 /
- 寡肽类 /
- 靶向追踪 /
- 抗肿瘤药
Abstract: The development and metasis of malignant tumor depend on neovascularization.CD13 is a significant marker of cells commit to myeloid lineage to classify leukemia, meanwhile it expresses on the neovascular endothelial cells specifically but expresses barely in vascular endothelial cells.Coupling CD13 monoclonal antibody or CD13 ligand to CD13 in fluorescence, radionuclide or magnetic nanoparticles to achieve molecular imaging to probe angiogenesis and provide imaging evidence of the development of angiogenesis associated disease.Asn-Gly-Arg peptide motif compound with different anticancer drugs targeted deliver to neovascular endothelial cells and release the anticancer drugs to treat the tumor.The research of CD13 to understand, diagnose and treat the angiogenesis associated diseases has gotten breakthrough and have a promising future.-
Key words:
- Neovascularization, pathologic /
- Antigens, CD13 /
- Oligopeptides /
- Target homing /
- Antineoplastic agents
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