Synthesis of Gd and<sup>68</sup>Ga Complexes in Conjugation with a Conformationally Optimized RGD Sequence as Potential MRI and PET Tumor-Imaging Probes
作者:Leonardo Manzoni、Laura Belvisi、Daniela Arosio、Maria Paola Bartolomeo、Aldo Bianchi、Chiara Brioschi、Federica Buonsanti、Claudia Cabella、Cesare Casagrande、Monica Civera、Marilenia De Matteo、Lorenza Fugazza、Luciano Lattuada、Federico Maisano、Luigi Miragoli、Cristina Neira、Michael Pilkington-Miksa、Carlo Scolastico
DOI:10.1002/cmdc.201200043
日期:2012.6
ανβ3 is involved in neo‐angiogenesis in solid tumors and is also directly expressed in cancer cells (e.g. glioblastomas, melanomas) and ovarian, breast, and prostate cancers, these constructs could prove useful as molecular imaging probes in cancer diagnosis by MRI or PET techniques. Molecular modeling, integrin binding assays, and relaxivity assessments allowed the selection of compounds suitable for
我们报告了用DPTA,DOTA,HP-DOA3以及由我们的研究小组开发的新型螯合剂AAZTA合成Gd和68 Ga的新型螯合物的方法。这些螯合剂得到适当缀合之前,金属络合,用DB58中,RGD肽模拟物,构象受限上的氮杂双环支架和用于整合素α高亲和力赋予ν β 3。因为α ν β 3它参与实体瘤的新血管生成,并直接在癌细胞(例如成胶质细胞瘤,黑色素瘤)以及卵巢癌,乳腺癌和前列腺癌中表达,这些构建体可以证明是通过MRI或PET技术在癌症诊断中的分子成像探针。分子建模,整联蛋白结合测定和弛豫性评估允许选择适合在树枝状或纳米粒子结构上多次表达的化合物。这些结果也使我们对有前途的68 Ga-PET技术进行了68 Ga络合物的探索性研究。AAZTA复合体15(68Ga)在胶质母细胞瘤的异种移植模型中表现出摄取,表明具有改善亲和力的新探针的潜在有用发展。