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PET imaging of VEGFR and integrins in glioma tumor xenografts using 89Zr labelled heterodimeric peptide.

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机构: [1]Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, PR China [2]Department of Nuclear Medicine, Laboratory of Clinical Nuclear Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, PR China
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Vascular endothelial growth factor receptor (VEGFR) and integrin αv are over-expressed in angiogenesis of variety malignant tumors with key roles in angiogenesis, and have been proven as valuable targets for cancer imaging and treatment. In this study, a heterodimeric peptide targeting VEGFR and integrin was designed, and radiolabeled with zirconium-89 (89Zr) for PET imaging of glioma. 89Zr-DFO-heterodimeric peptide, a the newly developed probe, was prepared with radiochemical yield of 88.7 ± 2.4%. Targeted binding capability of 89Zr-DFO-heterodimeric peptide towards U87MG cells was investigated in murine glioma xenograft models, which shows that the designed probe has good binding ability to both targeting sites. Biodistribution indicated that kidney metabolism is the main pathway and tumor uptake of 89Zr-DFO-heterodimeric peptide reached the peak of 0.62 ± 0.10% ID/g . U87MG xenograft could be clearly visualized by microPET/CT imaging through 1 to 3 h post-injection of 89Zr-DFO-heterodimeric peptide. Importantly, the tumor radiouptake was significantly reduced after blocking, and the imaging effect of this radioactive compound was more obvious than that of monomeric peptide probes. 89Zr-DFO-heterodimeric peptide has been demonstrated to show potential as a new radiopharmaceutical probe towards glioma, and multi-target probes do have advantages in tumor imaging.Copyright © 2022 Elsevier Ltd. All rights reserved.

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出版当年[2022]版:
大类 | 3 区 医学
小类 | 2 区 有机化学 3 区 药物化学 3 区 生化与分子生物学
最新[2023]版:
大类 | 3 区 医学
小类 | 2 区 有机化学 3 区 生化与分子生物学 3 区 药物化学
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第一作者机构: [1]Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, PR China
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